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

class StockPickingShipmentGroup(models.TransientModel):
    _name = 'stock.picking.shipment_group'
    _description = 'Stock Picking Shipment Group'

class StockPickingShipmentGroup(models.TransientModel):
    _name = 'stock.picking.shipment_group'
    _description = 'Stock Picking Shipment Group'

    def create_shipment_group(self):
        picking_ids = self.env.context.get('picking_ids')
        if not picking_ids:
            raise UserError("No stock picking selected.")

        pickings = self.env['stock.picking'].browse(picking_ids)

        shipment_group = self.env['shipment.group'].create({})

        for picking in pickings:
            if picking.shipment_group_id:
                continue
            picking.shipment_group_id = shipment_group.id

            for move in picking.move_ids_without_package:
                self.env['shipment.group.line'].create({
                    'shipment_id': shipment_group.id,
                    'product_id': move.product_id.id,
                    'carrier': picking.carrier,
                    'invoice_marketplace': picking.invoice_mp,
                    'picking_id': picking.id,
                })

        return {
            'type': 'ir.actions.act_window',
            'res_model': 'shipment.group',
            'view_mode': 'form',
            'res_id': shipment_group.id,
            'target': 'current',
        }