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

from flectra import api, fields, models, _
from flectra.exceptions import UserError


class ProductCategory(models.Model):
    _inherit = "product.category"

    property_account_income_categ_id = fields.Many2one('account.account', company_dependent=True,
        string="Income Account", oldname="property_account_income_categ",
        domain=[('deprecated', '=', False)],
        help="This account will be used when validating a customer invoice.")
    property_account_expense_categ_id = fields.Many2one('account.account', company_dependent=True,
        string="Expense Account", oldname="property_account_expense_categ",
        domain=[('deprecated', '=', False)],
        help="The expense is accounted for when a vendor bill is validated, except in anglo-saxon accounting with perpetual inventory valuation in which case the expense (Cost of Goods Sold account) is recognized at the customer invoice validation.")

#----------------------------------------------------------
# Products
#----------------------------------------------------------
class ProductTemplate(models.Model):
    _inherit = "product.template"

    taxes_id = fields.Many2many('account.tax', 'product_taxes_rel', 'prod_id', 'tax_id', string='Customer Taxes',
        domain=[('type_tax_use', '=', 'sale')])
    supplier_taxes_id = fields.Many2many('account.tax', 'product_supplier_taxes_rel', 'prod_id', 'tax_id', string='Vendor Taxes',
        domain=[('type_tax_use', '=', 'purchase')])
    property_account_income_id = fields.Many2one('account.account', company_dependent=True,
        string="Income Account", oldname="property_account_income",
        domain=[('deprecated', '=', False)],
        help="Keep this field empty to use the default value from the product category.")
    property_account_expense_id = fields.Many2one('account.account', company_dependent=True,
        string="Expense Account", oldname="property_account_expense",
        domain=[('deprecated', '=', False)],
        help="The expense is accounted for when a vendor bill is validated, except in anglo-saxon accounting with perpetual inventory valuation in which case the expense (Cost of Goods Sold account) is recognized at the customer invoice validation. If the field is empty, it uses the one defined in the product category.")

    @api.multi
    def write(self, vals):
        #TODO: really? i don't see the reason we'd need that constraint..
        check = self.ids and 'uom_po_id' in vals
        if check:
            self._cr.execute("SELECT id, uom_po_id FROM product_template WHERE id IN %s", [tuple(self.ids)])
            uoms = dict(self._cr.fetchall())
        res = super(ProductTemplate, self).write(vals)
        if check:
            self._cr.execute("SELECT id, uom_po_id FROM product_template WHERE id IN %s", [tuple(self.ids)])
            if dict(self._cr.fetchall()) != uoms:
                products = self.env['product.product'].search([('product_tmpl_id', 'in', self.ids)])
                if self.env['account.move.line'].search_count([('product_id', 'in', products.ids)]):
                    raise UserError(_('You can not change the unit of measure of a product that has been already used in an account journal item. If you need to change the unit of measure, you may deactivate this product.'))
        return res

    @api.multi
    def _get_product_accounts(self):
        return {
            'income': self.property_account_income_id or self.categ_id.property_account_income_categ_id,
            'expense': self.property_account_expense_id or self.categ_id.property_account_expense_categ_id
        }

    @api.multi
    def _get_asset_accounts(self):
        res = {}
        res['stock_input'] = False
        res['stock_output'] = False
        return res

    @api.multi
    def get_product_accounts(self, fiscal_pos=None):
        accounts = self._get_product_accounts()
        if not fiscal_pos:
            fiscal_pos = self.env['account.fiscal.position']
        return fiscal_pos.map_accounts(accounts)