# -*- coding: utf-8 -*-
# Copyright 2026 Nexa Systems Inc.
# License OPL-1 (Odoo Proprietary License v1.0)
# Part of the Fusion Plating product family.

from odoo import fields, models


class FpBatch(models.Model):
    """Extend batch with M2M link to MRP work orders.

    GAP 6: Batch ↔ Work Order linkage so the shop knows which WOs
    were processed in which tank batch (rack/barrel load).
    """
    _inherit = 'fusion.plating.batch'

    workorder_ids = fields.Many2many(
        'mrp.workorder',
        'fp_batch_mrp_workorder_rel',
        'batch_id',
        'workorder_id',
        string='Work Orders',
        help='MRP work orders processed in this batch.',
    )
    workorder_count = fields.Integer(
        string='WO Count',
        compute='_compute_workorder_count',
    )

    def _compute_workorder_count(self):
        for rec in self:
            rec.workorder_count = len(rec.workorder_ids)