flectra/addons/account/models/account_move.py

# -*- coding: utf-8 -*-

import time
from collections import OrderedDict
from flectra import api, fields, models, _
from flectra.osv import expression
from flectra.exceptions import RedirectWarning, UserError, ValidationError
from flectra.tools.misc import formatLang
from flectra.tools import float_is_zero, float_compare
from flectra.tools.safe_eval import safe_eval
from flectra.addons import decimal_precision as dp
from lxml import etree

#----------------------------------------------------------
# Entries
#----------------------------------------------------------

class AccountMove(models.Model):
    _name = "account.move"
    _description = "Account Entry"
    _order = 'date desc, id desc'
    _inherit = ['ir.branch.company.mixin']

    @api.multi
    @api.depends('name', 'state')
    def name_get(self):
        result = []
        for move in self:
            if move.state == 'draft':
                name = '* ' + str(move.id)
            else:
                name = move.name
            result.append((move.id, name))
        return result

    @api.multi
    @api.depends('line_ids.debit', 'line_ids.credit')
    def _amount_compute(self):
        for move in self:
            total = 0.0
            for line in move.line_ids:
                total += line.debit
            move.amount = total

    @api.depends('line_ids.debit', 'line_ids.credit', 'line_ids.matched_debit_ids.amount', 'line_ids.matched_credit_ids.amount', 'line_ids.account_id.user_type_id.type')
    def _compute_matched_percentage(self):
        """Compute the percentage to apply for cash basis method. This value is relevant only for moves that
        involve journal items on receivable or payable accounts.
        """
        for move in self:
            total_amount = 0.0
            total_reconciled = 0.0
            for line in move.line_ids:
                if line.account_id.user_type_id.type in ('receivable', 'payable'):
                    amount = abs(line.debit - line.credit)
                    total_amount += amount
                    for partial_line in (line.matched_debit_ids + line.matched_credit_ids):
                        total_reconciled += partial_line.amount
            precision_currency = move.currency_id or move.company_id.currency_id
            if float_is_zero(total_amount, precision_rounding=precision_currency.rounding):
                move.matched_percentage = 1.0
            else:
                move.matched_percentage = total_reconciled / total_amount

    @api.one
    @api.depends('company_id')
    def _compute_currency(self):
        self.currency_id = self.company_id.currency_id or self.env.user.company_id.currency_id

    @api.multi
    def _get_default_journal(self):
        if self.env.context.get('default_journal_type'):
            return self.env['account.journal'].search([('company_id', '=', self.env.user.company_id.id), ('type', '=', self.env.context['default_journal_type'])], limit=1).id

    @api.multi
    @api.depends('line_ids.partner_id')
    def _compute_partner_id(self):
        for move in self:
            partner = move.line_ids.mapped('partner_id')
            move.partner_id = partner.id if len(partner) == 1 else False

    @api.onchange('date')
    def _onchange_date(self):
        '''On the form view, a change on the date will trigger onchange() on account.move
        but not on account.move.line even the date field is related to account.move.
        Then, trigger the _onchange_amount_currency manually.
        '''
        self.line_ids._onchange_amount_currency()

    name = fields.Char(string='Number', required=True, copy=False, default='/')
    ref = fields.Char(string='Reference', copy=False)
    date = fields.Date(required=True, states={'posted': [('readonly', True)]}, index=True, default=fields.Date.context_today)
    journal_id = fields.Many2one('account.journal', string='Journal', required=True, states={'posted': [('readonly', True)]}, default=_get_default_journal)
    currency_id = fields.Many2one('res.currency', compute='_compute_currency', store=True, string="Currency")
    state = fields.Selection([('draft', 'Unposted'), ('posted', 'Posted')], string='Status',
      required=True, readonly=True, copy=False, default='draft',
      help='All manually created new journal entries are usually in the status \'Unposted\', '
           'but you can set the option to skip that status on the related journal. '
           'In that case, they will behave as journal entries automatically created by the '
           'system on document validation (invoices, bank statements...) and will be created '
           'in \'Posted\' status.')
    line_ids = fields.One2many('account.move.line', 'move_id', string='Journal Items',
        states={'posted': [('readonly', True)]}, copy=True)
    partner_id = fields.Many2one('res.partner', compute='_compute_partner_id', string="Partner", store=True, readonly=True)
    amount = fields.Monetary(compute='_amount_compute', store=True)
    narration = fields.Text(string='Internal Note')
    company_id = fields.Many2one('res.company', related='journal_id.company_id', string='Company', store=True, readonly=True)
    matched_percentage = fields.Float('Percentage Matched', compute='_compute_matched_percentage', digits=0, store=True, readonly=True, help="Technical field used in cash basis method")
    # Dummy Account field to search on account.move by account_id
    dummy_account_id = fields.Many2one('account.account', related='line_ids.account_id', string='Account', store=False, readonly=True)
    tax_cash_basis_rec_id = fields.Many2one(
        'account.partial.reconcile',
        string='Tax Cash Basis Entry of',
        help="Technical field used to keep track of the tax cash basis reconciliation. "
        "This is needed when cancelling the source: it will post the inverse journal entry to cancel that part too.")

    @api.model
    def fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):
        res = super(AccountMove, self).fields_view_get(
            view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)
        if self._context.get('vat_domain'):
            res['fields']['line_ids']['views']['tree']['fields']['tax_line_id']['domain'] = [('tag_ids', 'in', [self.env.ref(self._context.get('vat_domain')).id])]
        return res

    @api.model
    def create(self, vals):
        move = super(AccountMove, self.with_context(check_move_validity=False, partner_id=vals.get('partner_id'))).create(vals)
        move.assert_balanced()
        return move

    @api.multi
    def write(self, vals):
        if 'line_ids' in vals:
            res = super(AccountMove, self.with_context(check_move_validity=False)).write(vals)
            self.assert_balanced()
        else:
            res = super(AccountMove, self).write(vals)
        return res

    @api.multi
    def post(self):
        invoice = self._context.get('invoice', False)
        self._post_validate()
        for move in self:
            move.line_ids.create_analytic_lines()
            if move.name == '/':
                new_name = False
                journal = move.journal_id

                if invoice and invoice.move_name and invoice.move_name != '/':
                    new_name = invoice.move_name
                else:
                    if journal.sequence_id:
                        # If invoice is actually refund and journal has a refund_sequence then use that one or use the regular one
                        sequence = journal.sequence_id
                        if invoice and invoice.type in ['out_refund', 'in_refund'] and journal.refund_sequence:
                            if not journal.refund_sequence_id:
                                raise UserError(_('Please define a sequence for the credit notes'))
                            sequence = journal.refund_sequence_id

                        new_name = sequence.with_context(ir_sequence_date=move.date).next_by_id()
                    else:
                        raise UserError(_('Please define a sequence on the journal.'))

                if new_name:
                    move.name = new_name
        return self.write({'state': 'posted'})

    @api.multi
    def button_cancel(self):
        for move in self:
            if not move.journal_id.update_posted:
                raise UserError(_('You cannot modify a posted entry of this journal.\nFirst you should set the journal to allow cancelling entries.'))
        if self.ids:
            self.check_access_rights('write')
            self.check_access_rule('write')
            self._check_lock_date()
            self._cr.execute('UPDATE account_move '\
                       'SET state=%s '\
                       'WHERE id IN %s', ('draft', tuple(self.ids),))
            self.invalidate_cache()
        self._check_lock_date()
        return True

    @api.multi
    def unlink(self):
        for move in self:
            #check the lock date + check if some entries are reconciled
            move.line_ids._update_check()
            move.line_ids.unlink()
        return super(AccountMove, self).unlink()

    @api.multi
    def _post_validate(self):
        for move in self:
            if move.line_ids:
                if not all([x.company_id.id == move.company_id.id for x in move.line_ids]):
                    raise UserError(_("Cannot create moves for different companies."))
        self.assert_balanced()
        return self._check_lock_date()

    @api.multi
    def _check_lock_date(self):
        for move in self:
            lock_date = max(move.company_id.period_lock_date or '0000-00-00', move.company_id.fiscalyear_lock_date or '0000-00-00')
            if self.user_has_groups('account.group_account_manager'):
                lock_date = move.company_id.fiscalyear_lock_date
            if move.date <= (lock_date or '0000-00-00'):
                if self.user_has_groups('account.group_account_manager'):
                    message = _("You cannot add/modify entries prior to and inclusive of the lock date %s") % (lock_date)
                else:
                    message = _("You cannot add/modify entries prior to and inclusive of the lock date %s. Check the company settings or ask someone with the 'Adviser' role") % (lock_date)
                raise UserError(message)
        return True

    @api.multi
    def assert_balanced(self):
        if not self.ids:
            return True
        prec = self.env['decimal.precision'].precision_get('Account')

        self._cr.execute("""\
            SELECT      move_id
            FROM        account_move_line
            WHERE       move_id in %s
            GROUP BY    move_id
            HAVING      abs(sum(debit) - sum(credit)) > %s
            """, (tuple(self.ids), 10 ** (-max(5, prec))))
        if len(self._cr.fetchall()) != 0:
            raise UserError(_("Cannot create unbalanced journal entry."))
        return True

    @api.multi
    def _reverse_move(self, date=None, journal_id=None):
        self.ensure_one()
        reversed_move = self.copy(default={
            'date': date,
            'journal_id': journal_id.id if journal_id else self.journal_id.id,
            'ref': _('reversal of: ') + self.name})
        for acm_line in reversed_move.line_ids.with_context(check_move_validity=False):
            acm_line.write({
                'debit': acm_line.credit,
                'credit': acm_line.debit,
                'amount_currency': -acm_line.amount_currency
            })
        return reversed_move

    @api.multi
    def reverse_moves(self, date=None, journal_id=None):
        date = date or fields.Date.today()
        reversed_moves = self.env['account.move']
        for ac_move in self:
            #unreconcile all lines reversed
            aml = ac_move.line_ids.filtered(lambda x: x.account_id.reconcile or x.account_id.internal_type == 'liquidity')
            aml.remove_move_reconcile()
            reversed_move = ac_move._reverse_move(date=date,
                                                  journal_id=journal_id)
            reversed_moves |= reversed_move
            #unreconcile all lines reversed
            aml = ac_move.line_ids.filtered(lambda x: x.account_id.reconcile or x.account_id.internal_type == 'liquidity')
            aml.remove_move_reconcile()
            #reconcile together the reconciliable (or the liquidity aml) and their newly created counterpart
            for account in list(set([x.account_id for x in aml])):
                to_rec = aml.filtered(lambda y: y.account_id == account)
                to_rec |= reversed_move.line_ids.filtered(lambda y: y.account_id == account)
                #reconciliation will be full, so speed up the computation by using skip_full_reconcile_check in the context
                to_rec.with_context(skip_full_reconcile_check=True).reconcile()
                to_rec.force_full_reconcile()
        if reversed_moves:
            reversed_moves._post_validate()
            reversed_moves.post()
            return [x.id for x in reversed_moves]
        return []

    @api.multi
    def open_reconcile_view(self):
        return self.line_ids.open_reconcile_view()


class AccountMoveLine(models.Model):
    _name = "account.move.line"
    _description = "Journal Item"
    _order = "date desc, id desc"

    @api.model_cr
    def init(self):
        """ change index on partner_id to a multi-column index on (partner_id, ref), the new index will behave in the
            same way when we search on partner_id, with the addition of being optimal when having a query that will
            search on partner_id and ref at the same time (which is the case when we open the bank reconciliation widget)
        """
        cr = self._cr
        cr.execute('DROP INDEX IF EXISTS account_move_line_partner_id_index')
        cr.execute('SELECT indexname FROM pg_indexes WHERE indexname = %s', ('account_move_line_partner_id_ref_idx',))
        if not cr.fetchone():
            cr.execute('CREATE INDEX account_move_line_partner_id_ref_idx ON account_move_line (partner_id, ref)')

    @api.depends('debit', 'credit', 'amount_currency', 'currency_id', 'matched_debit_ids', 'matched_credit_ids', 'matched_debit_ids.amount', 'matched_credit_ids.amount', 'move_id.state')
    def _amount_residual(self):
        """ Computes the residual amount of a move line from a reconciliable account in the company currency and the line's currency.
            This amount will be 0 for fully reconciled lines or lines from a non-reconciliable account, the original line amount
            for unreconciled lines, and something in-between for partially reconciled lines.
        """
        for line in self:
            if not line.account_id.reconcile and line.account_id.internal_type != 'liquidity':
                line.reconciled = False
                line.amount_residual = 0
                line.amount_residual_currency = 0
                continue
            #amounts in the partial reconcile table aren't signed, so we need to use abs()
            amount = abs(line.debit - line.credit)
            amount_residual_currency = abs(line.amount_currency) or 0.0
            sign = 1 if (line.debit - line.credit) > 0 else -1
            if not line.debit and not line.credit and line.amount_currency and line.currency_id:
                #residual for exchange rate entries
                sign = 1 if float_compare(line.amount_currency, 0, precision_rounding=line.currency_id.rounding) == 1 else -1

            for partial_line in (line.matched_debit_ids + line.matched_credit_ids):
                # If line is a credit (sign = -1) we:
                #  - subtract matched_debit_ids (partial_line.credit_move_id == line)
                #  - add matched_credit_ids (partial_line.credit_move_id != line)
                # If line is a debit (sign = 1), do the opposite.
                sign_partial_line = sign if partial_line.credit_move_id == line else (-1 * sign)

                amount += sign_partial_line * partial_line.amount
                #getting the date of the matched item to compute the amount_residual in currency
                if line.currency_id:
                    if partial_line.currency_id and partial_line.currency_id == line.currency_id:
                        amount_residual_currency += sign_partial_line * partial_line.amount_currency
                    else:
                        if line.balance and line.amount_currency:
                            rate = line.amount_currency / line.balance
                        else:
                            date = partial_line.credit_move_id.date if partial_line.debit_move_id == line else partial_line.debit_move_id.date
                            rate = line.currency_id.with_context(date=date).rate
                        amount_residual_currency += sign_partial_line * line.currency_id.round(partial_line.amount * rate)

            #computing the `reconciled` field.
            reconciled = False
            digits_rounding_precision = line.company_id.currency_id.rounding
            if float_is_zero(amount, precision_rounding=digits_rounding_precision):
                if line.currency_id and line.amount_currency:
                    if float_is_zero(amount_residual_currency, precision_rounding=line.currency_id.rounding):
                        reconciled = True
                else:
                    reconciled = True
            line.reconciled = reconciled

            line.amount_residual = line.company_id.currency_id.round(amount * sign)
            line.amount_residual_currency = line.currency_id and line.currency_id.round(amount_residual_currency * sign) or 0.0

    @api.depends('debit', 'credit')
    def _store_balance(self):
        for line in self:
            line.balance = line.debit - line.credit

    @api.model
    def _get_currency(self):
        currency = False
        context = self._context or {}
        if context.get('default_journal_id', False):
            currency = self.env['account.journal'].browse(context['default_journal_id']).currency_id
        return currency

    @api.depends('debit', 'credit', 'move_id.matched_percentage', 'move_id.journal_id')
    def _compute_cash_basis(self):
        for move_line in self:
            if move_line.journal_id.type in ('sale', 'purchase'):
                move_line.debit_cash_basis = move_line.debit * move_line.move_id.matched_percentage
                move_line.credit_cash_basis = move_line.credit * move_line.move_id.matched_percentage
            else:
                move_line.debit_cash_basis = move_line.debit
                move_line.credit_cash_basis = move_line.credit
            move_line.balance_cash_basis = move_line.debit_cash_basis - move_line.credit_cash_basis

    @api.depends('move_id.line_ids', 'move_id.line_ids.tax_line_id', 'move_id.line_ids.debit', 'move_id.line_ids.credit')
    def _compute_tax_base_amount(self):
        for move_line in self:
            if move_line.tax_line_id:
                base_lines = move_line.move_id.line_ids.filtered(lambda line: move_line.tax_line_id in line.tax_ids)
                move_line.tax_base_amount = abs(sum(base_lines.mapped('balance')))
            else:
                move_line.tax_base_amount = 0

    @api.depends('move_id')
    def _compute_parent_state(self):
        for record in self.filtered('move_id'):
            record.parent_state = record.move_id.state

    @api.one
    @api.depends('move_id.line_ids')
    def _get_counterpart(self):
        counterpart = set()
        for line in self.move_id.line_ids:
            if (line.account_id.code != self.account_id.code):
                counterpart.add(line.account_id.code)
        if len(counterpart) > 2:
            counterpart = list(counterpart)[0:2] + ["..."]
        self.counterpart = ",".join(counterpart)

    name = fields.Char(string="Label")
    quantity = fields.Float(digits=dp.get_precision('Product Unit of Measure'),
        help="The optional quantity expressed by this line, eg: number of product sold. The quantity is not a legal requirement but is very useful for some reports.")
    product_uom_id = fields.Many2one('product.uom', string='Unit of Measure')
    product_id = fields.Many2one('product.product', string='Product')
    debit = fields.Monetary(default=0.0, currency_field='company_currency_id')
    credit = fields.Monetary(default=0.0, currency_field='company_currency_id')
    balance = fields.Monetary(compute='_store_balance', store=True, currency_field='company_currency_id',
        help="Technical field holding the debit - credit in order to open meaningful graph views from reports")
    debit_cash_basis = fields.Monetary(currency_field='company_currency_id', compute='_compute_cash_basis', store=True)
    credit_cash_basis = fields.Monetary(currency_field='company_currency_id', compute='_compute_cash_basis', store=True)
    balance_cash_basis = fields.Monetary(compute='_compute_cash_basis', store=True, currency_field='company_currency_id',
        help="Technical field holding the debit_cash_basis - credit_cash_basis in order to open meaningful graph views from reports")
    amount_currency = fields.Monetary(default=0.0, help="The amount expressed in an optional other currency if it is a multi-currency entry.")
    company_currency_id = fields.Many2one('res.currency', related='company_id.currency_id', string="Company Currency", readonly=True,
        help='Utility field to express amount currency', store=True)
    currency_id = fields.Many2one('res.currency', string='Currency', default=_get_currency,
        help="The optional other currency if it is a multi-currency entry.")
    amount_residual = fields.Monetary(compute='_amount_residual', string='Residual Amount', store=True, currency_field='company_currency_id',
        help="The residual amount on a journal item expressed in the company currency.")
    amount_residual_currency = fields.Monetary(compute='_amount_residual', string='Residual Amount in Currency', store=True,
        help="The residual amount on a journal item expressed in its currency (possibly not the company currency).")
    tax_base_amount = fields.Monetary(string="Base Amount", compute='_compute_tax_base_amount', currency_field='company_currency_id', store=True)
    account_id = fields.Many2one('account.account', string='Account', required=True, index=True,
        ondelete="cascade", domain=[('deprecated', '=', False)], default=lambda self: self._context.get('account_id', False))
    move_id = fields.Many2one('account.move', string='Journal Entry', ondelete="cascade",
        help="The move of this entry line.", index=True, required=True, auto_join=True)
    narration = fields.Text(related='move_id.narration', string='Narration')
    ref = fields.Char(related='move_id.ref', string='Reference', store=True, copy=False, index=True)
    payment_id = fields.Many2one('account.payment', string="Originator Payment", help="Payment that created this entry", copy=False)
    statement_line_id = fields.Many2one('account.bank.statement.line', index=True, string='Bank statement line reconciled with this entry', copy=False, readonly=True)
    statement_id = fields.Many2one('account.bank.statement', related='statement_line_id.statement_id', string='Statement', store=True,
        help="The bank statement used for bank reconciliation", index=True, copy=False)
    reconciled = fields.Boolean(compute='_amount_residual', store=True)
    full_reconcile_id = fields.Many2one('account.full.reconcile', string="Matching Number", copy=False)
    matched_debit_ids = fields.One2many('account.partial.reconcile', 'credit_move_id', String='Matched Debits',
        help='Debit journal items that are matched with this journal item.')
    matched_credit_ids = fields.One2many('account.partial.reconcile', 'debit_move_id', String='Matched Credits',
        help='Credit journal items that are matched with this journal item.')
    journal_id = fields.Many2one('account.journal', related='move_id.journal_id', string='Journal',
        index=True, store=True, copy=False)  # related is required
    blocked = fields.Boolean(string='No Follow-up', default=False,
        help="You can check this box to mark this journal item as a litigation with the associated partner")
    date_maturity = fields.Date(string='Due date', index=True, required=True,
        help="This field is used for payable and receivable journal entries. You can put the limit date for the payment of this line.")
    date = fields.Date(related='move_id.date', string='Date', index=True, store=True, copy=False)  # related is required
    analytic_line_ids = fields.One2many('account.analytic.line', 'move_id', string='Analytic lines', oldname="analytic_lines")
    tax_ids = fields.Many2many('account.tax', string='Taxes', domain=['|', ('active', '=', False), ('active', '=', True)])
    tax_line_id = fields.Many2one('account.tax', string='Originator tax', ondelete='restrict')
    analytic_account_id = fields.Many2one('account.analytic.account', string='Analytic Account')
    analytic_tag_ids = fields.Many2many('account.analytic.tag', string='Analytic tags')
    company_id = fields.Many2one('res.company', related='account_id.company_id', string='Company', store=True, readonly=True)
    branch_id = fields.Many2one(related='move_id.branch_id', string='Branch',
                                store=True)
    counterpart = fields.Char("Counterpart", compute='_get_counterpart', help="Compute the counter part accounts of this journal item for this journal entry. This can be needed in reports.")

    # TODO: put the invoice link and partner_id on the account_move
    invoice_id = fields.Many2one('account.invoice', oldname="invoice")
    partner_id = fields.Many2one('res.partner', string='Partner', ondelete='restrict')
    user_type_id = fields.Many2one('account.account.type', related='account_id.user_type_id', index=True, store=True, oldname="user_type")
    tax_exigible = fields.Boolean(string='Appears in VAT report', default=True,
        help="Technical field used to mark a tax line as exigible in the vat report or not (only exigible journal items are displayed). By default all new journal items are directly exigible, but with the feature cash_basis on taxes, some will become exigible only when the payment is recorded.")
    parent_state = fields.Char(compute="_compute_parent_state", help="State of the parent account.move")

    #Needed for setup, as a decoration attribute needs to know that for a tree view in one of the popups, and there's no way to reference directly a xml id from there
    is_unaffected_earnings_line = fields.Boolean(string="Is Unaffected Earnings Line", compute="_compute_is_unaffected_earnings_line", help="Tells whether or not this line belongs to an unaffected earnings account")

    _sql_constraints = [
        ('credit_debit1', 'CHECK (credit*debit=0)', 'Wrong credit or debit value in accounting entry !'),
        ('credit_debit2', 'CHECK (credit+debit>=0)', 'Wrong credit or debit value in accounting entry !'),
    ]

    @api.constrains('move_id', 'branch_id')
    def _check_branch(self):
        for order in self:
            move_branch_id = order.move_id.branch_id
            if order.branch_id and move_branch_id != order.branch_id:
                raise ValidationError(
                    _('Configuration Error of Branch:\n'
                      'The Move Line Branch (%s) and '
                      'the Branch (%s) of Journal Entry must '
                      'be the same branch!') % (order.branch_id.name,
                                                move_branch_id.name)
                )

    @api.constrains('company_id', 'branch_id')
    def _check_company(self):
        for order in self:
            if order.branch_id and order.company_id != order.branch_id.company_id:
                raise ValidationError(
                    _('Configuration Error of Company:\n'
                      'The Move Line Company (%s) and '
                      'the Company (%s) of Branch must '
                      'be the same company!') % (order.company_id.name,
                                                order.branch_id.company_id.name)
                )

    @api.model
    def default_get(self, fields):
        rec = super(AccountMoveLine, self).default_get(fields)
        if 'line_ids' not in self._context:
            return rec

        #compute the default credit/debit of the next line in case of a manual entry
        balance = 0
        for line in self._context['line_ids']:
            if line[2]:
                balance += line[2].get('debit', 0) - line[2].get('credit', 0)
        if balance < 0:
            rec.update({'debit': -balance})
        if balance > 0:
            rec.update({'credit': balance})
        return rec

    @api.multi
    @api.constrains('currency_id', 'account_id')
    def _check_currency(self):
        for line in self:
            account_currency = line.account_id.currency_id
            if account_currency and account_currency != line.company_id.currency_id:
                if not line.currency_id or line.currency_id != account_currency:
                    raise ValidationError(_('The selected account of your Journal Entry forces to provide a secondary currency. You should remove the secondary currency on the account.'))

    @api.multi
    @api.constrains('currency_id', 'amount_currency')
    def _check_currency_and_amount(self):
        for line in self:
            if (line.amount_currency and not line.currency_id):
                raise ValidationError(_("You cannot create journal items with a secondary currency without filling both 'currency' and 'amount currency' field."))

    @api.multi
    @api.constrains('amount_currency', 'debit', 'credit')
    def _check_currency_amount(self):
        for line in self:
            if line.amount_currency:
                if (line.amount_currency > 0.0 and line.credit > 0.0) or (line.amount_currency < 0.0 and line.debit > 0.0):
                    raise ValidationError(_('The amount expressed in the secondary currency must be positive when account is debited and negative when account is credited.'))

    @api.depends('account_id.user_type_id')
    def _compute_is_unaffected_earnings_line(self):
        for record in self:
            unaffected_earnings_type = self.env.ref("account.data_unaffected_earnings")
            record.is_unaffected_earnings_line = unaffected_earnings_type == record.account_id.user_type_id

    @api.onchange('amount_currency', 'currency_id')
    def _onchange_amount_currency(self):
        '''Recompute the debit/credit based on amount_currency/currency_id and date.
        However, date is a related field on account.move. Then, this onchange will not be triggered
        by the form view by changing the date on the account.move.
        To fix this problem, see _onchange_date method on account.move.
        '''
        for line in self:
            amount = line.amount_currency
            if line.currency_id and line.currency_id != line.company_currency_id:
                amount = line.currency_id.with_context(date=line.date).compute(amount, line.company_currency_id)
                line.debit = amount > 0 and amount or 0.0
                line.credit = amount < 0 and -amount or 0.0

    ####################################################
    # Reconciliation interface methods
    ####################################################

    @api.model
    def get_data_for_manual_reconciliation_widget(self, partner_ids, account_ids):
        """ Returns the data required for the invoices & payments matching of partners/accounts.
            If an argument is None, fetch all related reconciliations. Use [] to fetch nothing.
        """
        return {
            'customers': self.get_data_for_manual_reconciliation('partner', partner_ids, 'receivable'),
            'suppliers': self.get_data_for_manual_reconciliation('partner', partner_ids, 'payable'),
            'accounts': self.get_data_for_manual_reconciliation('account', account_ids),
        }

    @api.model
    def get_data_for_manual_reconciliation(self, res_type, res_ids=None, account_type=None):
        """ Returns the data required for the invoices & payments matching of partners/accounts (list of dicts).
            If no res_ids is passed, returns data for all partners/accounts that can be reconciled.

            :param res_type: either 'partner' or 'account'
            :param res_ids: ids of the partners/accounts to reconcile, use None to fetch data indiscriminately
                of the id, use [] to prevent from fetching any data at all.
            :param account_type: if a partner is both customer and vendor, you can use 'payable' to reconcile
                the vendor-related journal entries and 'receivable' for the customer-related entries.
        """
        if res_ids is not None and len(res_ids) == 0:
            # Note : this short-circuiting is better for performances, but also required
            # since postgresql doesn't implement empty list (so 'AND id in ()' is useless)
            return []
        res_ids = res_ids and tuple(res_ids)

        assert res_type in ('partner', 'account')
        assert account_type in ('payable', 'receivable', None)
        is_partner = res_type == 'partner'
        res_alias = is_partner and 'p' or 'a'

        query = ("""
            SELECT {0} account_id, account_name, account_code, max_date,
                   to_char(last_time_entries_checked, 'YYYY-MM-DD') AS last_time_entries_checked
            FROM (
                    SELECT {1}
                        {res_alias}.last_time_entries_checked AS last_time_entries_checked,
                        a.id AS account_id,
                        a.name AS account_name,
                        a.code AS account_code,
                        MAX(l.write_date) AS max_date
                    FROM
                        account_move_line l
                        RIGHT JOIN account_account a ON (a.id = l.account_id)
                        RIGHT JOIN account_account_type at ON (at.id = a.user_type_id)
                        {2}
                    WHERE
                        a.reconcile IS TRUE
                        AND l.full_reconcile_id is NULL
                        {3}
                        {4}
                        {5}
                        AND l.company_id = {6}
                        AND EXISTS (
                            SELECT NULL
                            FROM account_move_line l
                            WHERE l.account_id = a.id
                            {7}
                            AND l.amount_residual > 0
                        )
                        AND EXISTS (
                            SELECT NULL
                            FROM account_move_line l
                            WHERE l.account_id = a.id
                            {7}
                            AND l.amount_residual < 0
                        )
                    GROUP BY {8} a.id, a.name, a.code, {res_alias}.last_time_entries_checked
                    ORDER BY {res_alias}.last_time_entries_checked
                ) as s
            WHERE (last_time_entries_checked IS NULL OR max_date > last_time_entries_checked)
        """.format(
                is_partner and 'partner_id, partner_name,' or ' ',
                is_partner and 'p.id AS partner_id, p.name AS partner_name,' or ' ',
                is_partner and 'RIGHT JOIN res_partner p ON (l.partner_id = p.id)' or ' ',
                is_partner and ' ' or "AND at.type <> 'payable' AND at.type <> 'receivable'",
                account_type and "AND at.type = %(account_type)s" or '',
                res_ids and 'AND ' + res_alias + '.id in %(res_ids)s' or '',
                self.env.user.company_id.id,
                is_partner and 'AND l.partner_id = p.id' or ' ',
                is_partner and 'l.partner_id, p.id,' or ' ',
                res_alias=res_alias
            ))
        self.env.cr.execute(query, locals())

        # Apply ir_rules by filtering out
        rows = self.env.cr.dictfetchall()
        ids = [x['account_id'] for x in rows]
        allowed_ids = set(self.env['account.account'].browse(ids).ids)
        rows = [row for row in rows if row['account_id'] in allowed_ids]
        if is_partner:
            ids = [x['partner_id'] for x in rows]
            allowed_ids = set(self.env['res.partner'].browse(ids).ids)
            rows = [row for row in rows if row['partner_id'] in allowed_ids]

        # Fetch other data
        for row in rows:
            account = self.env['account.account'].browse(row['account_id'])
            row['currency_id'] = account.currency_id.id or account.company_id.currency_id.id
            partner_id = is_partner and row['partner_id'] or None
            row['reconciliation_proposition'] = self.get_reconciliation_proposition(account.id, partner_id)
        return rows

    @api.model
    def get_reconciliation_proposition(self, account_id, partner_id=False):
        """ Returns two lines whose amount are opposite """
        
        target_currency = (self.currency_id and self.amount_currency) and self.currency_id or self.company_id.currency_id
        partner_id_condition = partner_id and 'AND a.partner_id = %(partner_id)s' or ''

        rec_prop = self.env['account.move.line']
        # Get pairs
        move_line_id = self.env.context.get('move_line_id', False)
        if move_line_id:
            move_line = self.env['account.move.line'].browse(move_line_id)
            amount = move_line.amount_residual;
            rec_prop = move_line
            query = """
                    SELECT a.id, a.id FROM account_move_line a
                    WHERE a.amount_residual = -%(amount)s
                    AND NOT a.reconciled
                    AND a.account_id = %(account_id)s
                    AND a.id != %(move_line_id)s
                    {partner_id_condition}
                    ORDER BY a.date desc
                    LIMIT 10
                """.format(**locals())
        else:
            partner_id_condition = partner_id_condition and partner_id_condition+' AND b.partner_id = %(partner_id)s' or ''
            query = """
                    SELECT a.id, b.id
                    FROM account_move_line a, account_move_line b
                    WHERE a.amount_residual = -b.amount_residual
                    AND NOT a.reconciled AND NOT b.reconciled
                    AND a.account_id = %(account_id)s AND b.account_id = %(account_id)s
                    {partner_id_condition}
                    ORDER BY a.date desc
                    LIMIT 10
                """.format(**locals())

        self.env.cr.execute(query, locals())
        pairs = self.env.cr.fetchall()

        # Apply ir_rules by filtering out
        all_pair_ids = [element for tupl in pairs for element in tupl]
        allowed_ids = set(self.env['account.move.line'].browse(all_pair_ids).ids)
        pairs = [pair for pair in pairs if pair[0] in allowed_ids and pair[1] in allowed_ids]

        if len(pairs) > 0:
            rec_prop += self.browse(list(set(pairs[0])))

        if len(rec_prop) > 0:
            # Return lines formatted
            return rec_prop.prepare_move_lines_for_reconciliation_widget(target_currency=target_currency)
        return []

    @api.model
    def domain_move_lines_for_reconciliation(self, str):
        """ Returns the domain from the str search
            :param str: search string
        """
        if not str:
            return []
        str_domain = [
            '|', ('move_id.name', 'ilike', str),
            '|', ('move_id.ref', 'ilike', str),
            '|', ('date_maturity', 'like', str),
            '&', ('name', '!=', '/'), ('name', 'ilike', str)
        ]
        if str[0] in ['-', '+']:
            try:
                amounts_str = str.split('|')
                for amount_str in amounts_str:
                    amount = amount_str[0] == '-' and float(amount_str) or float(amount_str[1:])
                    amount_domain = [
                        '|', ('amount_residual', '=', amount),
                        '|', ('amount_residual_currency', '=', amount),
                        '|', (amount_str[0] == '-' and 'credit' or 'debit', '=', float(amount_str[1:])),
                        ('amount_currency', '=', amount),
                    ]
                    str_domain = expression.OR([str_domain, amount_domain])
            except:
                pass
        else:
            try:
                amount = float(str)
                amount_domain = [
                    '|', ('amount_residual', '=', amount),
                    '|', ('amount_residual_currency', '=', amount),
                    '|', ('amount_residual', '=', -amount),
                    '|', ('amount_residual_currency', '=', -amount),
                    '&', ('account_id.internal_type', '=', 'liquidity'),
                    '|', '|', '|', ('debit', '=', amount), ('credit', '=', amount),
                        ('amount_currency', '=', amount),
                        ('amount_currency', '=', -amount),
                ]
                str_domain = expression.OR([str_domain, amount_domain])
            except:
                pass
        return str_domain

    def _domain_move_lines_for_manual_reconciliation(self, account_id, partner_id=False, excluded_ids=None, str=False):
        """ Create domain criteria that are relevant to manual reconciliation. """
        domain = ['&', ('reconciled', '=', False), ('account_id', '=', account_id)]
        if partner_id:
            domain = expression.AND([domain, [('partner_id', '=', partner_id)]])
        if excluded_ids:
            domain = expression.AND([[('id', 'not in', excluded_ids)], domain])
        if str:
            str_domain = self.domain_move_lines_for_reconciliation(str=str)
            domain = expression.AND([domain, str_domain])
        return domain

    @api.model
    def get_move_lines_for_manual_reconciliation(self, account_id, partner_id=False, excluded_ids=None, str=False, offset=0, limit=None, target_currency_id=False):
        """ Returns unreconciled move lines for an account or a partner+account, formatted for the manual reconciliation widget """
        domain = self._domain_move_lines_for_manual_reconciliation(account_id, partner_id, excluded_ids, str)
        lines = self.search(domain, offset=offset, limit=limit, order="date_maturity desc, id desc")
        if target_currency_id:
            target_currency = self.env['res.currency'].browse(target_currency_id)
        else:
            account = self.env['account.account'].browse(account_id)
            target_currency = account.currency_id or account.company_id.currency_id
        return lines.prepare_move_lines_for_reconciliation_widget(target_currency=target_currency)

    @api.multi
    def prepare_move_lines_for_reconciliation_widget(self, target_currency=False, target_date=False):
        """ Returns move lines formatted for the manual/bank reconciliation widget

            :param target_currency: currency (Model or ID) you want the move line debit/credit converted into
            :param target_date: date to use for the monetary conversion
        """
        context = dict(self._context or {})
        ret = []

        if target_currency:
            # re-browse in case we were passed a currency ID via RPC call
            target_currency = self.env['res.currency'].browse(int(target_currency))

        for line in self:
            company_currency = line.account_id.company_id.currency_id
            line_currency = (line.currency_id and line.amount_currency) and line.currency_id or company_currency
            ret_line = {
                'id': line.id,
                'name': line.name and line.name != '/' and line.move_id.name + ': ' + line.name or line.move_id.name,
                'ref': line.move_id.ref or '',
                # For reconciliation between statement transactions and already registered payments (eg. checks)
                # NB : we don't use the 'reconciled' field because the line we're selecting is not the one that gets reconciled
                'account_id': [line.account_id.id, line.account_id.display_name],
                'already_paid': line.account_id.internal_type == 'liquidity',
                'account_code': line.account_id.code,
                'account_name': line.account_id.name,
                'account_type': line.account_id.internal_type,
                'date_maturity': line.date_maturity,
                'date': line.date,
                'journal_id': [line.journal_id.id, line.journal_id.display_name],
                'partner_id': line.partner_id.id,
                'partner_name': line.partner_id.name,
                'currency_id': line_currency.id,
            }

            debit = line.debit
            credit = line.credit
            amount = line.amount_residual
            amount_currency = line.amount_residual_currency

            # For already reconciled lines, don't use amount_residual(_currency)
            if line.account_id.internal_type == 'liquidity':
                amount = debit - credit
                amount_currency = line.amount_currency

            target_currency = target_currency or company_currency
            
            ctx = context.copy()
            ctx.update({'date': target_date or line.date})
            # Use case:
            # Let's assume that company currency is in USD and that we have the 3 following move lines
            #      Debit  Credit  Amount currency  Currency
            # 1)    25      0            0            NULL
            # 2)    17      0           25             EUR
            # 3)    33      0           25             YEN
            # 
            # If we ask to see the information in the reconciliation widget in company currency, we want to see
            # The following informations
            # 1) 25 USD (no currency information)
            # 2) 17 USD [25 EUR] (show 25 euro in currency information, in the little bill)
            # 3) 33 USD [25 YEN] (show 25 yen in currencu information)
            # 
            # If we ask to see the information in another currency than the company let's say EUR
            # 1) 35 EUR [25 USD]
            # 2) 25 EUR (no currency information)
            # 3) 50 EUR [25 YEN]
            # In that case, we have to convert the debit-credit to the currency we want and we show next to it
            # the value of the amount_currency or the debit-credit if no amount currency
            if target_currency == company_currency:
                if line_currency == target_currency:
                    amount = amount
                    amount_currency = ""
                    total_amount = debit - credit
                    total_amount_currency = ""
                else:
                    amount = amount
                    amount_currency = amount_currency
                    total_amount = debit - credit
                    total_amount_currency = line.amount_currency

            if target_currency != company_currency:
                if line_currency == target_currency:
                    amount = amount_currency
                    amount_currency = ""
                    total_amount = line.amount_currency
                    total_amount_currency = ""
                else:
                    amount_currency = line.currency_id and amount_currency or amount
                    amount = company_currency.with_context(ctx).compute(amount, target_currency)
                    total_amount = company_currency.with_context(ctx).compute((line.debit - line.credit), target_currency)
                    total_amount_currency = line.currency_id and line.amount_currency or (line.debit - line.credit)

            ret_line['debit'] = amount > 0 and amount or 0
            ret_line['credit'] = amount < 0 and -amount or 0
            ret_line['amount_currency'] = amount_currency
            ret_line['amount_str'] = formatLang(self.env, abs(amount), currency_obj=target_currency)
            ret_line['total_amount_str'] = formatLang(self.env, abs(total_amount), currency_obj=target_currency)
            ret_line['amount_currency_str'] = amount_currency and formatLang(self.env, abs(amount_currency), currency_obj=line_currency) or ""
            ret_line['total_amount_currency_str'] = total_amount_currency and formatLang(self.env, abs(total_amount_currency), currency_obj=line_currency) or ""
            ret.append(ret_line)
        return ret

    @api.model
    def process_reconciliations(self, data):
        """ Used to validate a batch of reconciliations in a single call
            :param data: list of dicts containing:
                - 'type': either 'partner' or 'account'
                - 'id': id of the affected res.partner or account.account
                - 'mv_line_ids': ids of exisiting account.move.line to reconcile
                - 'new_mv_line_dicts': list of dicts containing values suitable for account_move_line.create()
        """
        for datum in data:
            if len(datum['mv_line_ids']) >= 1 or len(datum['mv_line_ids']) + len(datum['new_mv_line_dicts']) >= 2:
                self.browse(datum['mv_line_ids']).process_reconciliation(datum['new_mv_line_dicts'])

            if datum['type'] == 'partner':
                partners = self.env['res.partner'].browse(datum['id'])
                partners.mark_as_reconciled()
            if datum['type'] == 'account':
                accounts = self.env['account.account'].browse(datum['id'])
                accounts.mark_as_reconciled()

    @api.multi
    def process_reconciliation(self, new_mv_line_dicts):
        """ Create new move lines from new_mv_line_dicts (if not empty) then call reconcile_partial on self and new move lines

            :param new_mv_line_dicts: list of dicts containing values suitable fot account_move_line.create()
        """
        if len(self) < 1 or len(self) + len(new_mv_line_dicts) < 2:
            raise UserError(_('A reconciliation must involve at least 2 move lines.'))

        # Create writeoff move lines
        if len(new_mv_line_dicts) > 0:
            writeoff_lines = self.env['account.move.line']
            company_currency = self[0].account_id.company_id.currency_id
            writeoff_currency = self[0].currency_id or company_currency
            for mv_line_dict in new_mv_line_dicts:
                if writeoff_currency != company_currency:
                    mv_line_dict['debit'] = writeoff_currency.compute(mv_line_dict['debit'], company_currency)
                    mv_line_dict['credit'] = writeoff_currency.compute(mv_line_dict['credit'], company_currency)
                writeoff_lines += self._create_writeoff(mv_line_dict)

            (self + writeoff_lines).reconcile()
        else:
            self.reconcile()

    ####################################################
    # Reconciliation methods
    ####################################################

    def _get_pair_to_reconcile(self):
        #field is either 'amount_residual' or 'amount_residual_currency' (if the reconciled account has a secondary currency set)
        company_currency_id = self[0].account_id.company_id.currency_id
        account_curreny_id = self[0].account_id.currency_id
        field = (account_curreny_id and company_currency_id != account_curreny_id) and 'amount_residual_currency' or 'amount_residual'
        #reconciliation on bank accounts are special cases as we don't want to set them as reconciliable
        #but we still want to reconcile entries that are reversed together in order to clear those lines
        #in the bank reconciliation report.
        if not self[0].account_id.reconcile and self[0].account_id.internal_type == 'liquidity':
            field = 'balance'
        rounding = self[0].company_id.currency_id.rounding
        if self[0].currency_id and all([x.amount_currency and x.currency_id == self[0].currency_id for x in self]):
            #or if all lines share the same currency
            field = 'amount_residual_currency'
            rounding = self[0].currency_id.rounding
        if self._context.get('skip_full_reconcile_check') == 'amount_currency_excluded':
            field = 'amount_residual'
        elif self._context.get('skip_full_reconcile_check') == 'amount_currency_only':
            field = 'amount_residual_currency'
        #target the pair of move in self that are the oldest
        sorted_moves = sorted(self, key=lambda a: a.date_maturity or a.date)
        debit = credit = False
        for aml in sorted_moves:
            if credit and debit:
                break
            if float_compare(aml[field], 0, precision_rounding=rounding) == 1 and not debit:
                debit = aml
            elif float_compare(aml[field], 0, precision_rounding=rounding) == -1 and not credit:
                credit = aml
        return debit, credit

    def auto_reconcile_lines(self):
        """ This function iterates recursively on the recordset given as parameter as long as it
            can find a debit and a credit to reconcile together. It returns the recordset of the
            account move lines that were not reconciled during the process.
        """
        if not self.ids:
            return self
        sm_debit_move, sm_credit_move = self._get_pair_to_reconcile()
        #there is no more pair to reconcile so return what move_line are left
        if not sm_credit_move or not sm_debit_move:
            return self
        company_currency_id = self[0].account_id.company_id.currency_id
        account_curreny_id = self[0].account_id.currency_id
        field = (account_curreny_id and company_currency_id != account_curreny_id) and 'amount_residual_currency' or 'amount_residual'
        if not sm_debit_move.debit and not sm_debit_move.credit:
            #both debit and credit field are 0, consider the amount_residual_currency field because it's an exchange difference entry
            field = 'amount_residual_currency'
        if self[0].currency_id and all([x.currency_id == self[0].currency_id for x in self]):
            #all the lines have the same currency, so we consider the amount_residual_currency field
            field = 'amount_residual_currency'
        if self._context.get('skip_full_reconcile_check') == 'amount_currency_excluded':
            field = 'amount_residual'
        elif self._context.get('skip_full_reconcile_check') == 'amount_currency_only':
            field = 'amount_residual_currency'
        #Reconcile the pair together
        amount_reconcile = min(sm_debit_move[field], -sm_credit_move[field])
        #Remove from recordset the one(s) that will be totally reconciled
        if amount_reconcile == sm_debit_move[field]:
            self -= sm_debit_move
        if amount_reconcile == -sm_credit_move[field]:
            self -= sm_credit_move

        #Check for the currency and amount_currency we can set
        currency = False
        amount_reconcile_currency = 0
        if sm_debit_move.currency_id == sm_credit_move.currency_id and sm_debit_move.currency_id.id:
            currency = sm_credit_move.currency_id.id
            amount_reconcile_currency = min(sm_debit_move.amount_residual_currency, -sm_credit_move.amount_residual_currency)

        amount_reconcile = min(sm_debit_move.amount_residual, -sm_credit_move.amount_residual)

        if self._context.get('skip_full_reconcile_check') == 'amount_currency_excluded':
            amount_reconcile_currency = 0.0

        self.env['account.partial.reconcile'].create({
            'debit_move_id': sm_debit_move.id,
            'credit_move_id': sm_credit_move.id,
            'amount': amount_reconcile,
            'amount_currency': amount_reconcile_currency,
            'currency_id': currency,
        })

        #Iterate process again on self
        return self.auto_reconcile_lines()

    @api.multi
    def reconcile(self, writeoff_acc_id=False, writeoff_journal_id=False):
        # Empty self can happen if the user tries to reconcile entries which are already reconciled.
        # The calling method might have filtered out reconciled lines.
        if not self:
            return True

        #Perform all checks on lines
        company_ids = set()
        all_accounts = []
        partners = set()
        for line in self:
            company_ids.add(line.company_id.id)
            all_accounts.append(line.account_id)
            if (line.account_id.internal_type in ('receivable', 'payable')):
                partners.add(line.partner_id.id)
            if line.reconciled:
                raise UserError(_('You are trying to reconcile some entries that are already reconciled!'))
        if len(company_ids) > 1:
            raise UserError(_('To reconcile the entries company should be the same for all entries!'))
        if len(set(all_accounts)) > 1:
            raise UserError(_('Entries are not of the same account!'))
        if not (all_accounts[0].reconcile or all_accounts[0].internal_type == 'liquidity'):
            raise UserError(_('The account %s (%s) is not marked as reconciliable !') % (all_accounts[0].name, all_accounts[0].code))

        #reconcile everything that can be
        remaining_moves = self.auto_reconcile_lines()

        #if writeoff_acc_id specified, then create write-off move with value the remaining amount from move in self
        if writeoff_acc_id and writeoff_journal_id and remaining_moves:
            all_aml_share_same_currency = all([x.currency_id == self[0].currency_id for x in self])
            writeoff_vals = {
                'account_id': writeoff_acc_id.id,
                'journal_id': writeoff_journal_id.id
            }
            if not all_aml_share_same_currency:
                writeoff_vals['amount_currency'] = False
            writeoff_to_reconcile = remaining_moves._create_writeoff(writeoff_vals)
            #add writeoff line to reconcile algo and finish the reconciliation
            remaining_moves = (remaining_moves + writeoff_to_reconcile).auto_reconcile_lines()
            return writeoff_to_reconcile
        return True

    def _create_writeoff(self, vals):
        """ Create a writeoff move for the account.move.lines in self. If debit/credit is not specified in vals,
            the writeoff amount will be computed as the sum of amount_residual of the given recordset.

            :param vals: dict containing values suitable fot account_move_line.create(). The data in vals will
                be processed to create bot writeoff acount.move.line and their enclosing account.move.
        """
        # Check and complete vals
        if 'account_id' not in vals or 'journal_id' not in vals:
            raise UserError(_("It is mandatory to specify an account and a journal to create a write-off."))
        if ('debit' in vals) ^ ('credit' in vals):
            raise UserError(_("Either pass both debit and credit or none."))
        if 'date' not in vals:
            vals['date'] = self._context.get('date_p') or time.strftime('%Y-%m-%d')
        if 'name' not in vals:
            vals['name'] = self._context.get('comment') or _('Write-Off')
        if 'analytic_account_id' not in vals:
            vals['analytic_account_id'] = self.env.context.get('analytic_id', False)
        #compute the writeoff amount if not given
        if 'credit' not in vals and 'debit' not in vals:
            amount = sum([r.amount_residual for r in self])
            vals['credit'] = amount > 0 and amount or 0.0
            vals['debit'] = amount < 0 and abs(amount) or 0.0
        vals['partner_id'] = self.env['res.partner']._find_accounting_partner(self[0].partner_id).id
        company_currency = self[0].account_id.company_id.currency_id
        writeoff_currency = self[0].currency_id or company_currency
        if not self._context.get('skip_full_reconcile_check') == 'amount_currency_excluded' and 'amount_currency' not in vals and writeoff_currency != company_currency:
            vals['currency_id'] = writeoff_currency.id
            sign = 1 if vals['debit'] > 0 else -1
            vals['amount_currency'] = sign * abs(sum([r.amount_residual_currency for r in self]))

        # Writeoff line in the account of self
        first_line_dict = self._prepare_writeoff_first_line_values(vals)

        # Writeoff line in specified writeoff account
        second_line_dict = self._prepare_writeoff_second_line_values(vals)

        # Create the move
        writeoff_move = self.env['account.move'].with_context(apply_taxes=True).create({
            'journal_id': vals['journal_id'],
            'date': vals['date'],
            'state': 'draft',
            'line_ids': [(0, 0, first_line_dict), (0, 0, second_line_dict)],
        })
        writeoff_move.post()

        # Return the writeoff move.line which is to be reconciled
        return writeoff_move.line_ids.filtered(lambda r: r.account_id == self[0].account_id)

    @api.multi
    def _prepare_writeoff_first_line_values(self, values):
        line_values = values.copy()
        line_values['account_id'] = self[0].account_id.id
        if 'analytic_account_id' in line_values:
            del line_values['analytic_account_id']
        if 'tax_ids' in line_values:
            tax_ids = []
            # vals['tax_ids'] is a list of commands [[4, tax_id, None], ...]
            for tax_id in values['tax_ids']:
                tax_ids.append(tax_id[1])
            amount = line_values['credit'] - line_values['debit']
            amount_tax = self.env['account.tax'].browse(tax_ids).compute_all(amount)['total_included']
            line_values['credit'] = amount_tax > 0 and amount_tax or 0.0
            line_values['debit'] = amount_tax < 0 and abs(amount_tax) or 0.0
            del line_values['tax_ids']
        return line_values

    @api.multi
    def _prepare_writeoff_second_line_values(self, values):
        line_values = values.copy()
        line_values['debit'], line_values['credit'] = line_values['credit'], line_values['debit']
        if 'amount_currency' in values:
            line_values['amount_currency'] = -line_values['amount_currency']
        return line_values

    def force_full_reconcile(self):
        """ After running the manual reconciliation wizard and making full reconciliation, we need to run this method to create
            potentially exchange rate entries that will balance the remaining amount_residual_currency (possibly several aml in
            different currencies).

            This ensure that all aml in the full reconciliation are reconciled (amount_residual = amount_residual_currency = 0).
        """
        aml_to_balance_currency = {}
        partial_rec_set = self.env['account.partial.reconcile']
        maxdate = '0000-00-00'

        # gather the max date for the move creation, and all aml that are unbalanced
        for aml in self:
            maxdate = max(aml.date, maxdate)
            if aml.amount_residual_currency:
                if aml.currency_id not in aml_to_balance_currency:
                    aml_to_balance_currency[aml.currency_id] = [self.env['account.move.line'], 0]
                aml_to_balance_currency[aml.currency_id][0] |= aml
                aml_to_balance_currency[aml.currency_id][1] += aml.amount_residual_currency
            partial_rec_set |= aml.matched_debit_ids | aml.matched_credit_ids

        #create an empty move that will hold all the exchange rate adjustments
        exchange_move = False
        if aml_to_balance_currency and any([residual for dummy, residual in aml_to_balance_currency.values()]):
            exchange_move = self.env['account.move'].create(
                self.env['account.full.reconcile']._prepare_exchange_diff_move(move_date=maxdate, company=self[0].company_id))

        for currency, values in aml_to_balance_currency.items():
            aml_to_balance = values[0]
            total_amount_currency = values[1]
            if total_amount_currency:
                #eventually create journal entries to book the difference due to foreign currency's exchange rate that fluctuates
                aml_recs, partial_recs = self.env['account.partial.reconcile'].create_exchange_rate_entry(aml_to_balance, 0.0, total_amount_currency, currency, exchange_move)

                #add the ecxhange rate line and the exchange rate partial reconciliation in the et of the full reconcile
                self |= aml_recs
                partial_rec_set |= partial_recs
            else:
                aml_to_balance.reconcile()

        if exchange_move:
            exchange_move.post()

        #mark the reference on the partial reconciliations and the entries
        #Note that we should always have all lines with an amount_residual and an amount_residual_currency equal to 0
        partial_rec_ids = [x.id for x in list(partial_rec_set)]
        self.env['account.full.reconcile'].create({
            'partial_reconcile_ids': [(6, 0, partial_rec_ids)],
            'reconciled_line_ids': [(6, 0, self.ids)],
            'exchange_move_id': exchange_move.id if exchange_move else False,
        })

    @api.multi
    def remove_move_reconcile(self):
        """ Undo a reconciliation """
        if not self:
            return True
        rec_move_ids = self.env['account.partial.reconcile']
        for account_move_line in self:
            for invoice in account_move_line.payment_id.invoice_ids:
                if invoice.id == self.env.context.get('invoice_id') and account_move_line in invoice.payment_move_line_ids:
                    account_move_line.payment_id.write({'invoice_ids': [(3, invoice.id, None)]})
            rec_move_ids += account_move_line.matched_debit_ids
            rec_move_ids += account_move_line.matched_credit_ids
        if self.env.context.get('invoice_id'):
            current_invoice = self.env['account.invoice'].browse(self.env.context['invoice_id'])
            aml_to_keep = current_invoice.move_id.line_ids | current_invoice.move_id.line_ids.mapped('full_reconcile_id.exchange_move_id.line_ids')
            rec_move_ids = rec_move_ids.filtered(
                lambda r: (r.debit_move_id + r.credit_move_id) & aml_to_keep
            )
        return rec_move_ids.unlink()

    ####################################################
    # CRUD methods
    ####################################################

    #TODO: to check/refactor
    @api.model
    def create(self, vals):
        """ :context's key apply_taxes: set to True if you want vals['tax_ids'] to result in the creation of move lines for taxes and eventual
                adjustment of the line amount (in case of a tax included in price).

            :context's key `check_move_validity`: check data consistency after move line creation. Eg. set to false to disable verification that the move
                debit-credit == 0 while creating the move lines composing the move.

        """
        context = dict(self._context or {})
        amount = vals.get('debit', 0.0) - vals.get('credit', 0.0)
        if not vals.get('partner_id') and context.get('partner_id'):
            vals['partner_id'] = context.get('partner_id')
        move = self.env['account.move'].browse(vals['move_id'])
        account = self.env['account.account'].browse(vals['account_id'])
        if account.deprecated:
            raise UserError(_('The account %s (%s) is deprecated !') %(account.name, account.code))
        if 'journal_id' in vals and vals['journal_id']:
            context['journal_id'] = vals['journal_id']
        if 'date' in vals and vals['date']:
            context['date'] = vals['date']
        if 'journal_id' not in context:
            context['journal_id'] = move.journal_id.id
            context['date'] = move.date
        #we need to treat the case where a value is given in the context for period_id as a string
        if not context.get('journal_id', False) and context.get('search_default_journal_id', False):
            context['journal_id'] = context.get('search_default_journal_id')
        if 'date' not in context:
            context['date'] = fields.Date.context_today(self)
        journal = vals.get('journal_id') and self.env['account.journal'].browse(vals['journal_id']) or move.journal_id
        vals['date_maturity'] = vals.get('date_maturity') or vals.get('date') or move.date
        ok = not (journal.type_control_ids or journal.account_control_ids)

        if journal.type_control_ids:
            type = account.user_type_id
            for t in journal.type_control_ids:
                if type == t:
                    ok = True
                    break
        if journal.account_control_ids and not ok:
            for a in journal.account_control_ids:
                if a.id == vals['account_id']:
                    ok = True
                    break
        # Automatically convert in the account's secondary currency if there is one and
        # the provided values were not already multi-currency
        if account.currency_id and 'amount_currency' not in vals and account.currency_id.id != account.company_id.currency_id.id:
            vals['currency_id'] = account.currency_id.id
            if self._context.get('skip_full_reconcile_check') == 'amount_currency_excluded':
                vals['amount_currency'] = 0.0
            else:
                ctx = {}
                if 'date' in vals:
                    ctx['date'] = vals['date']
                vals['amount_currency'] = account.company_id.currency_id.with_context(ctx).compute(amount, account.currency_id)

        if not ok:
            raise UserError(_('You cannot use this general account in this journal, check the tab \'Entry Controls\' on the related journal.'))

        # Create tax lines
        tax_lines_vals = []
        if context.get('apply_taxes') and vals.get('tax_ids'):
            # Get ids from triplets : https://www.flectra.com/documentation/10.0/reference/orm.html#flectra.models.Model.write
            tax_ids = [tax['id'] for tax in self.resolve_2many_commands('tax_ids', vals['tax_ids']) if tax.get('id')]
            # Since create() receives ids instead of recordset, let's just use the old-api bridge
            taxes = self.env['account.tax'].browse(tax_ids)
            currency = self.env['res.currency'].browse(vals.get('currency_id'))
            partner = self.env['res.partner'].browse(vals.get('partner_id'))
            res = taxes.with_context(dict(self._context, round=True)).compute_all(amount,
                currency, 1, vals.get('product_id'), partner)
            # Adjust line amount if any tax is price_include
            if abs(res['total_excluded']) < abs(amount):
                if vals['debit'] != 0.0: vals['debit'] = res['total_excluded']
                if vals['credit'] != 0.0: vals['credit'] = -res['total_excluded']
                if vals.get('amount_currency'):
                    vals['amount_currency'] = self.env['res.currency'].browse(vals['currency_id']).round(vals['amount_currency'] * (res['total_excluded']/amount))
            # Create tax lines
            for tax_vals in res['taxes']:
                if tax_vals['amount']:
                    tax = self.env['account.tax'].browse([tax_vals['id']])
                    account_id = (amount > 0 and tax_vals['account_id'] or tax_vals['refund_account_id'])
                    if not account_id: account_id = vals['account_id']
                    temp = {
                        'account_id': account_id,
                        'name': vals['name'] + ' ' + tax_vals['name'],
                        'tax_line_id': tax_vals['id'],
                        'move_id': vals['move_id'],
                        'partner_id': vals.get('partner_id'),
                        'statement_id': vals.get('statement_id'),
                        'debit': tax_vals['amount'] > 0 and tax_vals['amount'] or 0.0,
                        'credit': tax_vals['amount'] < 0 and -tax_vals['amount'] or 0.0,
                        'analytic_account_id': vals.get('analytic_account_id') if tax.analytic else False,
                    }
                    bank = self.env["account.bank.statement"].browse(vals.get('statement_id'))
                    if bank.currency_id != bank.company_id.currency_id:
                        ctx = {}
                        if 'date' in vals:
                            ctx['date'] = vals['date']
                        temp['currency_id'] = bank.currency_id.id
                        temp['amount_currency'] = bank.company_id.currency_id.with_context(ctx).compute(tax_vals['amount'], bank.currency_id, round=True)
                    tax_lines_vals.append(temp)

        #Toggle the 'tax_exigible' field to False in case it is not yet given and the tax in 'tax_line_id' or one of
        #the 'tax_ids' is a cash based tax.
        taxes = False
        if vals.get('tax_line_id'):
            taxes = [{'tax_exigibility': self.env['account.tax'].browse(vals['tax_line_id']).tax_exigibility}]
        if vals.get('tax_ids'):
            taxes = self.env['account.move.line'].resolve_2many_commands('tax_ids', vals['tax_ids'])
        if taxes and any([tax['tax_exigibility'] == 'on_payment' for tax in taxes]) and not vals.get('tax_exigible'):
            vals['tax_exigible'] = False

        new_line = super(AccountMoveLine, self).create(vals)
        for tax_line_vals in tax_lines_vals:
            # TODO: remove .with_context(context) once this context nonsense is solved
            self.with_context(context).create(tax_line_vals)

        if self._context.get('check_move_validity', True):
            move.with_context(context)._post_validate()

        return new_line

    @api.multi
    def unlink(self):
        self._update_check()
        move_ids = set()
        for line in self:
            if line.move_id.id not in move_ids:
                move_ids.add(line.move_id.id)
        result = super(AccountMoveLine, self).unlink()
        if self._context.get('check_move_validity', True) and move_ids:
            self.env['account.move'].browse(list(move_ids))._post_validate()
        return result

    @api.multi
    def write(self, vals):
        if ('account_id' in vals) and self.env['account.account'].browse(vals['account_id']).deprecated:
            raise UserError(_('You cannot use deprecated account.'))
        if any(key in vals for key in ('account_id', 'journal_id', 'date', 'move_id', 'debit', 'credit')):
            self._update_check()
        if not self._context.get('allow_amount_currency') and any(key in vals for key in ('amount_currency', 'currency_id')):
            #hackish workaround to write the amount_currency when assigning a payment to an invoice through the 'add' button
            #this is needed to compute the correct amount_residual_currency and potentially create an exchange difference entry
            self._update_check()
        #when we set the expected payment date, log a note on the invoice_id related (if any)
        if vals.get('expected_pay_date') and self.invoice_id:
            msg = _('New expected payment date: ') + vals['expected_pay_date'] + '.\n' + vals.get('internal_note', '')
            self.invoice_id.message_post(body=msg) #TODO: check it is an internal note (not a regular email)!
        #when making a reconciliation on an existing liquidity journal item, mark the payment as reconciled
        for record in self:
            if 'statement_line_id' in vals and record.payment_id:
                # In case of an internal transfer, there are 2 liquidity move lines to match with a bank statement
                if all(line.statement_id for line in record.payment_id.move_line_ids.filtered(lambda r: r.id != record.id and r.account_id.internal_type=='liquidity')):
                    record.payment_id.state = 'reconciled'

        result = super(AccountMoveLine, self).write(vals)
        if self._context.get('check_move_validity', True) and any(key in vals for key in ('account_id', 'journal_id', 'date', 'move_id', 'debit', 'credit')):
            move_ids = set()
            for line in self:
                if line.move_id.id not in move_ids:
                    move_ids.add(line.move_id.id)
            self.env['account.move'].browse(list(move_ids))._post_validate()
        return result

    @api.multi
    def _update_check(self):
        """ Raise Warning to cause rollback if the move is posted, some entries are reconciled or the move is older than the lock date"""
        move_ids = set()
        for line in self:
            err_msg = _('Move name (id): %s (%s)') % (line.move_id.name, str(line.move_id.id))
            if line.move_id.state != 'draft':
                raise UserError(_('You cannot do this modification on a posted journal entry, you can just change some non legal fields. You must revert the journal entry to cancel it.\n%s.') % err_msg)
            if line.reconciled and not (line.debit == 0 and line.credit == 0):
                raise UserError(_('You cannot do this modification on a reconciled entry. You can just change some non legal fields or you must unreconcile first.\n%s.') % err_msg)
            if line.move_id.id not in move_ids:
                move_ids.add(line.move_id.id)
        self.env['account.move'].browse(list(move_ids))._check_lock_date()
        return True

    ####################################################
    # Misc / utility methods
    ####################################################

    @api.multi
    @api.depends('ref', 'move_id')
    def name_get(self):
        result = []
        for line in self:
            if line.ref:
                result.append((line.id, (line.move_id.name or '') + '(' + line.ref + ')'))
            else:
                result.append((line.id, line.move_id.name))
        return result

    def _get_matched_percentage(self):
        """ This function returns a dictionary giving for each move_id of self, the percentage to consider as cash basis factor.
        This is actuallty computing the same as the matched_percentage field of account.move, except in case of multi-currencies
        where we recompute the matched percentage based on the amount_currency fields.
        Note that this function is used only by the tax cash basis module since we want to consider the matched_percentage only
        based on the company currency amounts in reports.
        """
        matched_percentage_per_move = {}
        for line in self:
            if not matched_percentage_per_move.get(line.move_id.id, False):
                lines_to_consider = line.move_id.line_ids.filtered(lambda x: x.account_id.internal_type in ('receivable', 'payable'))
                total_amount_currency = 0.0
                total_reconciled_currency = 0.0
                all_same_currency = False
                #if all receivable/payable aml and their payments have the same currency, we can safely consider
                #the amount_currency fields to avoid including the exchange rate difference in the matched_percentage
                if lines_to_consider and all([x.currency_id.id == lines_to_consider[0].currency_id.id for x in lines_to_consider]):
                    all_same_currency = lines_to_consider[0].currency_id.id
                    for line in lines_to_consider:
                        if all_same_currency:
                            total_amount_currency += abs(line.amount_currency)
                            for partial_line in (line.matched_debit_ids + line.matched_credit_ids):
                                if partial_line.currency_id and partial_line.currency_id.id == all_same_currency:
                                    total_reconciled_currency += partial_line.amount_currency
                                else:
                                    all_same_currency = False
                                    break
                if not all_same_currency:
                    #we cannot rely on amount_currency fields as it is not present on all partial reconciliation
                    matched_percentage_per_move[line.move_id.id] = line.move_id.matched_percentage
                else:
                    #we can rely on amount_currency fields, which allow us to post a tax cash basis move at the initial rate
                    #to avoid currency rate difference issues.
                    if total_amount_currency == 0.0:
                        matched_percentage_per_move[line.move_id.id] = 1.0
                    else:
                        matched_percentage_per_move[line.move_id.id] = total_reconciled_currency / total_amount_currency
        return matched_percentage_per_move

    @api.model
    def compute_amount_fields(self, amount, src_currency, company_currency, invoice_currency=False):
        """ Helper function to compute value for fields debit/credit/amount_currency based on an amount and the currencies given in parameter"""
        amount_currency = False
        currency_id = False
        if src_currency and src_currency != company_currency:
            amount_currency = amount
            amount = src_currency.with_context(self._context).compute(amount, company_currency)
            currency_id = src_currency.id
        debit = amount > 0 and amount or 0.0
        credit = amount < 0 and -amount or 0.0
        if invoice_currency and invoice_currency != company_currency and not amount_currency:
            amount_currency = src_currency.with_context(self._context).compute(amount, invoice_currency)
            currency_id = invoice_currency.id
        return debit, credit, amount_currency, currency_id

    @api.multi
    def create_analytic_lines(self):
        """ Create analytic items upon validation of an account.move.line having an analytic account. This
            method first remove any existing analytic item related to the line before creating any new one.
        """
        self.mapped('analytic_line_ids').unlink()
        for obj_line in self:
            if obj_line.analytic_account_id:
                vals_line = obj_line._prepare_analytic_line()[0]
                self.env['account.analytic.line'].create(vals_line)

    @api.one
    def _prepare_analytic_line(self):
        """ Prepare the values used to create() an account.analytic.line upon validation of an account.move.line having
            an analytic account. This method is intended to be extended in other modules.
        """
        amount = (self.credit or 0.0) - (self.debit or 0.0)
        return {
            'name': self.name,
            'date': self.date,
            'branch_id': self.branch_id and self.branch_id.id,
            'account_id': self.analytic_account_id.id,
            'tag_ids': [(6, 0, self.analytic_tag_ids.ids)],
            'unit_amount': self.quantity,
            'product_id': self.product_id and self.product_id.id or False,
            'product_uom_id': self.product_uom_id and self.product_uom_id.id or False,
            'amount': self.company_currency_id.with_context(date=self.date or fields.Date.context_today(self)).compute(amount, self.analytic_account_id.currency_id) if self.analytic_account_id.currency_id else amount,
            'general_account_id': self.account_id.id,
            'ref': self.ref,
            'move_id': self.id,
            'user_id': self.invoice_id.user_id.id or self._uid,
        }

    @api.model
    def _query_get(self, domain=None):
        context = dict(self._context or {})
        domain = domain or []
        if not isinstance(domain, (list, tuple)):
            domain = safe_eval(domain)
        date_field = 'date'
        if context.get('aged_balance'):
            date_field = 'date_maturity'
        if context.get('date_to'):
            domain += [(date_field, '<=', context['date_to'])]
        if context.get('date_from'):
            if not context.get('strict_range'):
                domain += ['|', (date_field, '>=', context['date_from']), ('account_id.user_type_id.include_initial_balance', '=', True)]
            elif context.get('initial_bal'):
                domain += [(date_field, '<', context['date_from'])]
            else:
                domain += [(date_field, '>=', context['date_from'])]

        if context.get('journal_ids'):
            domain += [('journal_id', 'in', context['journal_ids'])]

        state = context.get('state')
        if state and state.lower() != 'all':
            domain += [('move_id.state', '=', state)]

        if context.get('company_id'):
            domain += [('company_id', '=', context['company_id'])]

        if context.get('branch_id', False):
            domain += [('branch_id', '=', context['branch_id'][0])]

        if 'company_ids' in context:
            domain += [('company_id', 'in', context['company_ids'])]

        if context.get('reconcile_date'):
            domain += ['|', ('reconciled', '=', False), '|', ('matched_debit_ids.max_date', '>', context['reconcile_date']), ('matched_credit_ids.max_date', '>', context['reconcile_date'])]

        if context.get('account_tag_ids'):
            domain += [('account_id.tag_ids', 'in', context['account_tag_ids'].ids)]

        if context.get('account_ids'):
            domain += [('account_id', 'in', context['account_ids'].ids)]

        if context.get('analytic_tag_ids'):
            domain += ['|', ('analytic_account_id.tag_ids', 'in', context['analytic_tag_ids'].ids), ('analytic_tag_ids', 'in', context['analytic_tag_ids'].ids)]

        if context.get('analytic_account_ids'):
            domain += [('analytic_account_id', 'in', context['analytic_account_ids'].ids)]

        where_clause = ""
        where_clause_params = []
        tables = ''
        if domain:
            query = self._where_calc(domain)
            tables, where_clause, where_clause_params = query.get_sql()
        return tables, where_clause, where_clause_params

    @api.multi
    def open_reconcile_view(self):
        [action] = self.env.ref('account.action_account_moves_all_a').read()
        ids = []
        for aml in self:
            if aml.account_id.reconcile:
                ids.extend([r.debit_move_id.id for r in aml.matched_debit_ids] if aml.credit > 0 else [r.credit_move_id.id for r in aml.matched_credit_ids])
                ids.append(aml.id)
        action['domain'] = [('id', 'in', ids)]
        return action


class AccountPartialReconcile(models.Model):
    _name = "account.partial.reconcile"
    _description = "Partial Reconcile"

    debit_move_id = fields.Many2one('account.move.line', index=True, required=True)
    credit_move_id = fields.Many2one('account.move.line', index=True, required=True)
    amount = fields.Monetary(currency_field='company_currency_id', help="Amount concerned by this matching. Assumed to be always positive")
    amount_currency = fields.Monetary(string="Amount in Currency")
    currency_id = fields.Many2one('res.currency', string='Currency')
    company_currency_id = fields.Many2one('res.currency', related='company_id.currency_id', readonly=True,
        help='Utility field to express amount currency')
    company_id = fields.Many2one('res.company', related='debit_move_id.company_id', store=True, string='Currency')
    branch_id = fields.Many2one(related='debit_move_id.branch_id', store=True,
                                 string='Branch')
    full_reconcile_id = fields.Many2one('account.full.reconcile', string="Full Reconcile", copy=False)
    max_date = fields.Date(string='Max Date of Matched Lines', compute='_compute_max_date',
        readonly=True, copy=False, store=True,
        help='Technical field used to determine at which date this reconciliation needs to be shown on the aged receivable/payable reports.')

    @api.multi
    @api.depends('debit_move_id.date', 'credit_move_id.date')
    def _compute_max_date(self):
        for rec in self:
            rec.max_date = max(
                fields.Datetime.from_string(rec.debit_move_id.date),
                fields.Datetime.from_string(rec.credit_move_id.date)
            )

    @api.model
    def _prepare_exchange_diff_partial_reconcile(self, aml, line_to_reconcile, currency):
        return {
            'debit_move_id': aml.credit and line_to_reconcile.id or aml.id,
            'credit_move_id': aml.debit and line_to_reconcile.id or aml.id,
            'amount': abs(aml.amount_residual),
            'amount_currency': abs(aml.amount_residual_currency),
            'currency_id': currency.id,
        }

    @api.model
    def create_exchange_rate_entry(self, aml_to_fix, amount_diff, diff_in_currency, currency, move):
        """
        Automatically create a journal items to book the exchange rate
        differences that can occure in multi-currencies environment. That
        new journal item will be made into the given `move` in the company
        `currency_exchange_journal_id`, and one of its journal items is
        matched with the other lines to balance the full reconciliation.

        :param aml_to_fix: recordset of account.move.line (possible several
            but sharing the same currency)
        :param amount_diff: float. Amount in company currency to fix
        :param diff_in_currency: float. Amount in foreign currency `currency`
            to fix
        :param currency: res.currency
        :param move: account.move
        :return: tuple.
            [0]: account.move.line created to balance the `aml_to_fix`
            [1]: recordset of account.partial.reconcile created between the
                tuple first element and the `aml_to_fix`
        """
        partial_rec = self.env['account.partial.reconcile']
        aml_model = self.env['account.move.line']

        amount_diff = move.company_id.currency_id.round(amount_diff)
        diff_in_currency = currency and currency.round(diff_in_currency) or 0

        created_lines = self.env['account.move.line']
        for aml in aml_to_fix:
            #create the line that will compensate all the aml_to_fix
            line_to_rec = aml_model.with_context(check_move_validity=False).create({
                'name': _('Currency exchange rate difference'),
                'debit': amount_diff < 0 and -aml.amount_residual or 0.0,
                'credit': amount_diff > 0 and aml.amount_residual or 0.0,
                'account_id': aml.account_id.id,
                'move_id': move.id,
                'currency_id': currency.id,
                'amount_currency': diff_in_currency and -aml.amount_residual_currency or 0.0,
                'partner_id': aml.partner_id.id,
            })
            #create the counterpart on exchange gain/loss account
            exchange_journal = move.company_id.currency_exchange_journal_id
            aml_model.with_context(check_move_validity=False).create({
                'name': _('Currency exchange rate difference'),
                'debit': amount_diff > 0 and aml.amount_residual or 0.0,
                'credit': amount_diff < 0 and -aml.amount_residual or 0.0,
                'account_id': amount_diff > 0 and exchange_journal.default_debit_account_id.id or exchange_journal.default_credit_account_id.id,
                'move_id': move.id,
                'currency_id': currency.id,
                'amount_currency': diff_in_currency and aml.amount_residual_currency or 0.0,
                'partner_id': aml.partner_id.id,
            })

            #reconcile all aml_to_fix
            partial_rec |= self.with_context(skip_full_reconcile_check=True).create(
                self._prepare_exchange_diff_partial_reconcile(
                        aml=aml,
                        line_to_reconcile=line_to_rec,
                        currency=currency)
            )
            created_lines |= line_to_rec
        return created_lines, partial_rec

    def _get_tax_cash_basis_base_account(self, line, tax):
        ''' Get the account of lines that will contain the base amount of taxes.

        :param line: An account.move.line record
        :param tax: An account.tax record
        :return: An account record
        '''
        return line.account_id

    def create_tax_cash_basis_entry(self, percentage_before_rec):
        self.ensure_one()
        move_date = self.debit_move_id.date
        newly_created_move = self.env['account.move']
        for move in (self.debit_move_id.move_id, self.credit_move_id.move_id):
            #move_date is the max of the 2 reconciled items
            if move_date < move.date:
                move_date = move.date
            for line in move.line_ids:
                #TOCHECK: normal and cash basis taxes shoudn't be mixed together (on the same invoice line for example) as it will
                # create reporting issues. Not sure of the behavior to implement in that case, though.
                if not line.tax_exigible:
                    percentage_before = percentage_before_rec[move.id]
                    percentage_after = line._get_matched_percentage()[move.id]
                    #amount is the current cash_basis amount minus the one before the reconciliation
                    amount = line.balance * percentage_after - line.balance * percentage_before
                    rounded_amt = line.company_id.currency_id.round(amount)
                    if float_is_zero(rounded_amt, precision_rounding=line.company_id.currency_id.rounding):
                        continue
                    if line.tax_line_id and line.tax_line_id.tax_exigibility == 'on_payment':
                        if not newly_created_move:
                            newly_created_move = self._create_tax_basis_move()
                        #create cash basis entry for the tax line
                        to_clear_aml = self.env['account.move.line'].with_context(check_move_validity=False).create({
                            'name': line.move_id.name,
                            'debit': abs(rounded_amt) if rounded_amt < 0 else 0.0,
                            'credit': rounded_amt if rounded_amt > 0 else 0.0,
                            'account_id': line.account_id.id,
                            'tax_exigible': True,
                            'amount_currency': self.amount_currency and line.currency_id.round(-line.amount_currency * amount / line.balance) or 0.0,
                            'currency_id': line.currency_id.id,
                            'move_id': newly_created_move.id,
                            'partner_id': line.partner_id.id,
                            })
                        # Group by cash basis account and tax
                        self.env['account.move.line'].with_context(check_move_validity=False).create({
                            'name': line.name,
                            'debit': rounded_amt if rounded_amt > 0 else 0.0,
                            'credit': abs(rounded_amt) if rounded_amt < 0 else 0.0,
                            'account_id': line.tax_line_id.cash_basis_account.id,
                            'tax_line_id': line.tax_line_id.id,
                            'tax_exigible': True,
                            'amount_currency': self.amount_currency and line.currency_id.round(line.amount_currency * amount / line.balance) or 0.0,
                            'currency_id': line.currency_id.id,
                            'move_id': newly_created_move.id,
                            'partner_id': line.partner_id.id,
                        })
                        if line.account_id.reconcile:
                            #setting the account to allow reconciliation will help to fix rounding errors
                            to_clear_aml |= line
                            to_clear_aml.reconcile()

                    if any([tax.tax_exigibility == 'on_payment' for tax in line.tax_ids]):
                        if not newly_created_move:
                            newly_created_move = self._create_tax_basis_move()
                        #create cash basis entry for the base
                        for tax in line.tax_ids:
                            account_id = self._get_tax_cash_basis_base_account(line, tax)
                            self.env['account.move.line'].with_context(check_move_validity=False).create({
                                'name': line.name,
                                'debit': rounded_amt > 0 and rounded_amt or 0.0,
                                'credit': rounded_amt < 0 and abs(rounded_amt) or 0.0,
                                'account_id': account_id.id,
                                'tax_exigible': True,
                                'tax_ids': [(6, 0, [tax.id])],
                                'move_id': newly_created_move.id,
                                'currency_id': line.currency_id.id,
                                'amount_currency': self.amount_currency and line.currency_id.round(line.amount_currency * amount / line.balance) or 0.0,
                                'partner_id': line.partner_id.id,
                            })
                            self.env['account.move.line'].with_context(check_move_validity=False).create({
                                'name': line.name,
                                'credit': rounded_amt > 0 and rounded_amt or 0.0,
                                'debit': rounded_amt < 0 and abs(rounded_amt) or 0.0,
                                'account_id': account_id.id,
                                'tax_exigible': True,
                                'move_id': newly_created_move.id,
                                'currency_id': line.currency_id.id,
                                'amount_currency': self.amount_currency and line.currency_id.round(-line.amount_currency * amount / line.balance) or 0.0,
                                'partner_id': line.partner_id.id,
                            })
            if newly_created_move:
                if move_date > (self.company_id.period_lock_date or '0000-00-00') and newly_created_move.date != move_date:
                    # The move date should be the maximum date between payment and invoice (in case
                    # of payment in advance). However, we should make sure the move date is not
                    # recorded before the period lock date as the tax statement for this period is
                    # probably already sent to the estate.
                    newly_created_move.write({'date': move_date})
                # post move
                newly_created_move.post()

    def _create_tax_basis_move(self):
        # Check if company_journal for cash basis is set if not, raise exception
        if not self.company_id.tax_cash_basis_journal_id:
            raise UserError(_('There is no tax cash basis journal defined '
                              'for this company: "%s" \nConfigure it in Accounting/Configuration/Settings') %
                            (self.company_id.name))
        move_vals = {
            'journal_id': self.company_id.tax_cash_basis_journal_id.id,
            'tax_cash_basis_rec_id': self.id,
            'ref': self.credit_move_id.move_id.name if self.credit_move_id.payment_id else self.debit_move_id.move_id.name,
        }
        return self.env['account.move'].create(move_vals)

    def _compute_partial_lines(self):
        if self._context.get('skip_full_reconcile_check'):
            #when running the manual reconciliation wizard, don't check the partials separately for full
            #reconciliation or exchange rate because it is handled manually after the whole processing
            return self
        #check if the reconcilation is full
        #first, gather all journal items involved in the reconciliation just created
        aml_set = aml_to_balance = self.env['account.move.line']
        total_debit = 0
        total_credit = 0
        total_amount_currency = 0
        #make sure that all partial reconciliations share the same secondary currency otherwise it's not
        #possible to compute the exchange difference entry and it has to be done manually.
        currency = self[0].currency_id
        maxdate = '0000-00-00'

        seen = set()
        todo = set(self)
        while todo:
            partial_rec = todo.pop()
            seen.add(partial_rec)
            if partial_rec.currency_id != currency:
                #no exchange rate entry will be created
                currency = None
            for aml in [partial_rec.debit_move_id, partial_rec.credit_move_id]:
                if aml not in aml_set:
                    if aml.amount_residual or aml.amount_residual_currency:
                        aml_to_balance |= aml
                    maxdate = max(aml.date, maxdate)
                    total_debit += aml.debit
                    total_credit += aml.credit
                    aml_set |= aml
                    if aml.currency_id and aml.currency_id == currency:
                        total_amount_currency += aml.amount_currency
                    elif partial_rec.currency_id and partial_rec.currency_id == currency:
                        #if the aml has no secondary currency but is reconciled with other journal item(s) in secondary currency, the amount
                        #currency is recorded on the partial rec and in order to check if the reconciliation is total, we need to convert the
                        #aml.balance in that foreign currency
                        total_amount_currency += aml.company_id.currency_id.with_context(date=aml.date).compute(aml.balance, partial_rec.currency_id)

                for x in aml.matched_debit_ids | aml.matched_credit_ids:
                    if x not in seen:
                        todo.add(x)

        partial_rec_ids = [x.id for x in seen]
        aml_ids = aml_set.ids
        #then, if the total debit and credit are equal, or the total amount in currency is 0, the reconciliation is full
        digits_rounding_precision = aml_set[0].company_id.currency_id.rounding
        if (currency and float_is_zero(total_amount_currency, precision_rounding=currency.rounding)) or float_compare(total_debit, total_credit, precision_rounding=digits_rounding_precision) == 0:
            exchange_move_id = False
            if currency and aml_to_balance:
                exchange_move = self.env['account.move'].create(
                    self.env['account.full.reconcile']._prepare_exchange_diff_move(move_date=maxdate, company=aml_to_balance[0].company_id))
                #eventually create a journal entry to book the difference due to foreign currency's exchange rate that fluctuates
                rate_diff_amls, rate_diff_partial_rec = self.create_exchange_rate_entry(aml_to_balance, total_debit - total_credit, total_amount_currency, currency, exchange_move)
                aml_ids += rate_diff_amls.ids
                partial_rec_ids += rate_diff_partial_rec.ids
                exchange_move.post()
                exchange_move_id = exchange_move.id
            #mark the reference of the full reconciliation on the partial ones and on the entries
            self.env['account.full.reconcile'].create({
                'partial_reconcile_ids': [(6, 0, partial_rec_ids)],
                'reconciled_line_ids': [(6, 0, aml_ids)],
                'exchange_move_id': exchange_move_id,
            })

    @api.model
    def create(self, vals):
        aml = []
        if vals.get('debit_move_id', False):
            aml.append(vals['debit_move_id'])
        if vals.get('credit_move_id', False):
            aml.append(vals['credit_move_id'])
        # Get value of matched percentage from both move before reconciliating
        lines = self.env['account.move.line'].browse(aml)
        if lines[0].account_id.internal_type in ('receivable', 'payable'):
            percentage_before_rec = lines._get_matched_percentage()
        # Reconcile
        res = super(AccountPartialReconcile, self).create(vals)
        # if the reconciliation is a matching on a receivable or payable account, eventually create a tax cash basis entry
        if lines[0].account_id.internal_type in ('receivable', 'payable'):
            res.create_tax_cash_basis_entry(percentage_before_rec)
        res._compute_partial_lines()
        return res

    @api.multi
    def unlink(self):
        """ When removing a partial reconciliation, also unlink its full reconciliation if it exists """
        full_to_unlink = self.env['account.full.reconcile']
        for rec in self:
            #without the deleted partial reconciliations, the full reconciliation won't be full anymore
            if rec.full_reconcile_id:
                full_to_unlink |= rec.full_reconcile_id
        #reverse the tax basis move created at the reconciliation time
        move = self.env['account.move'].search([('tax_cash_basis_rec_id', 'in', self._ids)])
        move.reverse_moves()
        res = super(AccountPartialReconcile, self).unlink()
        if full_to_unlink:
            full_to_unlink.unlink()
        return res


class AccountFullReconcile(models.Model):
    _name = "account.full.reconcile"
    _description = "Full Reconcile"

    name = fields.Char(string='Number', required=True, copy=False, default=lambda self: self.env['ir.sequence'].next_by_code('account.reconcile'))
    partial_reconcile_ids = fields.One2many('account.partial.reconcile', 'full_reconcile_id', string='Reconciliation Parts')
    reconciled_line_ids = fields.One2many('account.move.line', 'full_reconcile_id', string='Matched Journal Items')
    exchange_move_id = fields.Many2one('account.move')

    @api.multi
    def unlink(self):
        """ When removing a full reconciliation, we need to revert the eventual journal entries we created to book the
            fluctuation of the foreign currency's exchange rate.
            We need also to reconcile together the origin currency difference line and its reversal in order to completly
            cancel the currency difference entry on the partner account (otherwise it will still appear on the aged balance
            for example).
        """
        for rec in self:
            if rec.exchange_move_id:
                # reverse the exchange rate entry after de-referencing it to avoid looping
                # (reversing will cause a nested attempt to drop the full reconciliation)
                to_reverse = rec.exchange_move_id
                rec.exchange_move_id = False
                to_reverse.reverse_moves()
        return super(AccountFullReconcile, self).unlink()

    @api.model
    def _prepare_exchange_diff_move(self, move_date, company):
        if not company.currency_exchange_journal_id:
            raise UserError(_("You should configure the 'Exchange Rate Journal' in the accounting settings, to manage automatically the booking of accounting entries related to differences between exchange rates."))
        if not company.income_currency_exchange_account_id.id:
            raise UserError(_("You should configure the 'Gain Exchange Rate Account' in the accounting settings, to manage automatically the booking of accounting entries related to differences between exchange rates."))
        if not company.expense_currency_exchange_account_id.id:
            raise UserError(_("You should configure the 'Loss Exchange Rate Account' in the accounting settings, to manage automatically the booking of accounting entries related to differences between exchange rates."))
        res = {'journal_id': company.currency_exchange_journal_id.id}
        # The move date should be the maximum date between payment and invoice
        # (in case of payment in advance). However, we should make sure the
        # move date is not recorded after the end of year closing.
        if move_date > (company.fiscalyear_lock_date or '0000-00-00'):
            res['date'] = move_date
        return res