from odoo import models, fields, api

class PurchaseOrderLine(models.Model):
    _inherit = 'purchase.order.line'

    customer_ids = fields.Many2many(
        related='order_id.requisition_id.customer_ids',
        string='Customers',
        store=True,
        help='Customers associated with this purchase order line'
    )

    requisition_id = fields.Many2one(
        related='order_id.requisition_id',
        string='Purchase Requisition',
        store=True
    )

    def _get_product_purchase_description(self, product_lang):
        name = super()._get_product_purchase_description(product_lang)
        if self.requisition_id:
            name = f"[REQ/{self.requisition_id.name}] {name}"
        if self.customer_ids:
            name = f"[{', '.join(self.customer_ids.mapped('name'))}] {name}"
        return name

    @api.model
    def _prepare_purchase_order_line(self, product_id, product_qty, product_uom, company_id, supplier, po):
        res = super()._prepare_purchase_order_line(product_id, product_qty, product_uom, company_id, supplier, po)
        # Si on a une réquisition, on ne veut pas regrouper les lignes
        if po.requisition_id:
            existing_line = po.order_line.filtered(lambda l: l.product_id == product_id and l.requisition_id == po.requisition_id)
            if existing_line:
                # Créer une nouvelle ligne au lieu de mettre à jour la quantité
                res['product_qty'] = product_qty
            else:
                res['product_qty'] = product_qty
        return res

    @api.model_create_multi
    def create(self, vals_list):
        lines = super().create(vals_list)
        for line in lines:
            if line.name:
                name = line.name
                if line.requisition_id:
                    name = f"[REQ/{line.requisition_id.name}] {name}"
                if line.customer_ids:
                    name = f"[{', '.join(line.customer_ids.mapped('name'))}] {name}"
                line.name = name
        return lines

    def _find_candidate(self, product_id, product_qty, product_uom, location_id, name, origin, company_id, values):
        return super(
            PurchaseOrderLine, self.filtered(lambda line: not line.requisition_id))._find_candidate(
            product_id, 
            product_qty, 
            product_uom, 
            location_id, 
            name, 
            origin, 
            company_id, 
            values
        )