# -*- coding: utf-8 -*-
from odoo import models, fields, api, _
from odoo.exceptions import UserError

class C2CRepackOrder(models.Model):
    _name = 'c2c.repack.order'
    _description = 'C2C Repacking Order'
    _order = 'create_date desc'

    name = fields.Char('Reference', default='New', readonly=True)
    state = fields.Selection([('draft', 'Draft'), ('done', 'Done')], default='draft', readonly=True)
    
    company_id = fields.Many2one('res.company', string='Company', default=lambda self: self.env.company)
    location_id = fields.Many2one('stock.location', string='Location', domain="[('usage', '=', 'internal')]", required=True)
    
    # Source (Bulk)
    source_product_id = fields.Many2one('product.product', string='Bulk Product', required=True)
    source_qty = fields.Float('Bulk Qty to Repack', required=True, default=1.0)
    source_uom_id = fields.Many2one('uom.uom', string='Bulk UoM', related='source_product_id.uom_id')
    source_lot_id = fields.Many2one('stock.lot', string='Bulk Lot', domain="[('product_id', '=', source_product_id)]")
    
    # Destination (Retail)
    dest_product_id = fields.Many2one('product.product', string='Retail Pack Product', required=True)
    dest_qty = fields.Float('Number of Retail Packs', required=True)
    dest_uom_id = fields.Many2one('uom.uom', string='Retail UoM', related='dest_product_id.uom_id')
    dest_lot_id = fields.Many2one('stock.lot', string='New Retail Lot', domain="[('product_id', '=', dest_product_id)]")
    
    move_ids = fields.One2many('stock.move', 'repack_id', string='Stock Moves')

    @api.model_create_multi
    def create(self, vals_list):
        for vals in vals_list:
            if vals.get('name', 'New') == 'New':
                vals['name'] = self.env['ir.sequence'].next_by_code('c2c.repack.order') or 'REPACK'
        return super().create(vals_list)

    def action_confirm_repack(self):
        """Consume bulk and create retail packs."""
        self.ensure_one()
        if self.state == 'done':
            return
            
        if self.source_qty <= 0 or self.dest_qty <= 0:
            raise UserError('Quantities must be strictly positive.')
            
        prod_location = self.location_id
        scrap_location = self.env['stock.location'].search([('scrap_location', '=', True), ('company_id', '=', self.company_id.id)], limit=1)
        if not scrap_location:
            # Fallback to standard production loction usually handled via standard routes, but we can do a simple virtual production loc
            scrap_location = self.env.ref('stock.location_production')

        # 1. Consume Bulk (Move from Internal to Production)
        consume_move = self.env['stock.move'].create({
            'name': 'Repack Consume %s' % self.name,
            'product_id': self.source_product_id.id,
            'product_uom_qty': self.source_qty,
            'product_uom': self.source_uom_id.id,
            'location_id': prod_location.id,
            'location_dest_id': scrap_location.id,
            'repack_id': self.id,
            'state': 'draft',
            'company_id': self.company_id.id,
        })
        consume_move._action_confirm()
        if self.source_lot_id:
            self.env['stock.move.line'].create({
                'move_id': consume_move.id,
                'product_id': self.source_product_id.id,
                'product_uom_id': self.source_uom_id.id,
                'quantity': self.source_qty,
                'lot_id': self.source_lot_id.id,
                'location_id': prod_location.id,
                'location_dest_id': scrap_location.id,
            })
        else:
            consume_move.quantity = self.source_qty
        consume_move._action_done()

        # 2. Produce Retail Packs (Move from Production to Internal)
        produce_move = self.env['stock.move'].create({
            'name': 'Repack Produce %s' % self.name,
            'product_id': self.dest_product_id.id,
            'product_uom_qty': self.dest_qty,
            'product_uom': self.dest_uom_id.id,
            'location_id': scrap_location.id,
            'location_dest_id': prod_location.id,
            'repack_id': self.id,
            'state': 'draft',
            'company_id': self.company_id.id,
        })
        produce_move._action_confirm()
        if self.dest_lot_id:
            self.env['stock.move.line'].create({
                'move_id': produce_move.id,
                'product_id': self.dest_product_id.id,
                'product_uom_id': self.dest_uom_id.id,
                'quantity': self.dest_qty,
                'lot_id': self.dest_lot_id.id,
                'location_id': scrap_location.id,
                'location_dest_id': prod_location.id,
            })
        else:
            produce_move.quantity = self.dest_qty
        produce_move._action_done()

        self.write({'state': 'done'})

class StockMove(models.Model):
    _inherit = 'stock.move'
    repack_id = fields.Many2one('c2c.repack.order', string='Repack Order', copy=False)