# -*- coding: utf-8 -*-
# Part of Odoo, Flectra. See LICENSE file for full copyright and licensing details.

from flectra import api, fields, models, _
from flectra.addons import decimal_precision as dp
from flectra.exceptions import UserError
from flectra.tools import float_is_zero
import math

class ChangeProductionQty(models.TransientModel):
    _name = 'change.production.qty'
    _description = 'Change Quantity of Products'

    # TDE FIXME: add production_id field
    mo_id = fields.Many2one('mrp.production', 'Manufacturing Order', required=True)
    product_qty = fields.Float(
        'Quantity To Produce',
        digits=dp.get_precision('Product Unit of Measure'), required=True)

    @api.model
    def default_get(self, fields):
        res = super(ChangeProductionQty, self).default_get(fields)
        if 'mo_id' in fields and not res.get('mo_id') and self._context.get('active_model') == 'mrp.production' and self._context.get('active_id'):
            res['mo_id'] = self._context['active_id']
        if 'product_qty' in fields and not res.get('product_qty') and res.get('mo_id'):
            res['product_qty'] = self.env['mrp.production'].browse(res['mo_id']).product_qty
        return res

    @api.model
    def _update_product_to_produce(self, production, qty):
        production_move = production.move_finished_ids.filtered(lambda x:x.product_id.id == production.product_id.id and x.state not in ('done', 'cancel'))
        if production_move:
            production_move.write({'product_uom_qty': qty})
        else:
            production_move = production._generate_finished_moves()
            production_move = production.move_finished_ids.filtered(lambda x : x.state not in ('done', 'cancel') and production.product_id.id == x.product_id.id)
            production_move.write({'product_uom_qty': qty})

    @api.multi
    def change_prod_qty(self):
        precision = self.env['decimal.precision'].precision_get('Product Unit of Measure')
        for wizard in self:
            production = wizard.mo_id
            produced = sum(production.move_finished_ids.filtered(lambda m: m.product_id == production.product_id).mapped('quantity_done'))
            if wizard.product_qty < produced:
                format_qty = '%.{precision}f'.format(precision=precision)
                raise UserError(_("You have already processed %s. Please input a quantity higher than %s ") % (format_qty % produced, format_qty % produced))
            production.write({'product_qty': wizard.product_qty})
            done_moves = production.move_finished_ids.filtered(lambda x: x.state == 'done' and x.product_id == production.product_id)
            qty_produced = production.product_id.uom_id._compute_quantity(sum(done_moves.mapped('product_qty')), production.product_uom_id)
            factor = production.product_uom_id._compute_quantity(production.product_qty - qty_produced, production.bom_id.product_uom_id) / production.bom_id.product_qty
            boms, lines = production.bom_id.explode(production.product_id, factor, picking_type=production.bom_id.picking_type_id)
            for line, line_data in lines:
                production._update_raw_move(line, line_data)
            operation_bom_qty = {}
            for bom, bom_data in boms:
                for operation in bom.routing_id.operation_ids:
                    operation_bom_qty[operation.id] = bom_data['qty']
            self._update_product_to_produce(production, production.product_qty - qty_produced)
            moves = production.move_raw_ids.filtered(lambda x: x.state not in ('done', 'cancel'))
            moves._action_assign()
            for wo in production.workorder_ids:
                operation = wo.operation_id
                if operation_bom_qty.get(operation.id):
                    cycle_number = math.ceil(operation_bom_qty[operation.id] / operation.workcenter_id.capacity)  # TODO: float_round UP
                    wo.duration_expected = (operation.workcenter_id.time_start +
                                 operation.workcenter_id.time_stop +
                                 cycle_number * operation.time_cycle * 100.0 / operation.workcenter_id.time_efficiency)
                quantity = wo.qty_production - wo.qty_produced
                if production.product_id.tracking == 'serial':
                    quantity = 1.0 if not float_is_zero(quantity, precision_digits=precision) else 0.0
                else:
                    quantity = quantity if (quantity > 0) else 0
                if float_is_zero(quantity, precision_digits=precision):
                    wo.final_lot_id = False
                    wo.active_move_line_ids.unlink()
                wo.qty_producing = quantity
                if wo.qty_produced < wo.qty_production and wo.state == 'done':
                    wo.state = 'progress'
                # assign moves; last operation receive all unassigned moves
                # TODO: following could be put in a function as it is similar as code in _workorders_create
                # TODO: only needed when creating new moves
                moves_raw = production.move_raw_ids.filtered(lambda move: move.operation_id == operation and move.state not in ('done', 'cancel'))
                if wo == production.workorder_ids[-1]:
                    moves_raw |= production.move_raw_ids.filtered(lambda move: not move.operation_id)
                moves_finished = production.move_finished_ids.filtered(lambda move: move.operation_id == operation) #TODO: code does nothing, unless maybe by_products?
                moves_raw.mapped('move_line_ids').write({'workorder_id': wo.id})
                (moves_finished + moves_raw).write({'workorder_id': wo.id})
                if quantity > 0 and wo.move_raw_ids.filtered(lambda x: x.product_id.tracking != 'none') and not wo.active_move_line_ids:
                    wo._generate_lot_ids()
        return {}