# -*- 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 api, fields, models


class FpCertificate(models.Model):
    """Add Specification linkage + auto-fill spec_reference from it.

    Lives in fusion_plating_quality because customer.spec lives here.
    Quality already depends on certificates, so the inverse direction
    works.
    """
    _inherit = 'fp.certificate'

    customer_spec_id = fields.Many2one(
        'fusion.plating.customer.spec',
        string='Specification',
        help='Snapshot of the specification the cert was issued against. '
             'Drives the spec_reference printed on the CoC.',
    )

    @api.model_create_multi
    def create(self, vals_list):
        """Auto-fill spec_reference from the SO line's customer_spec_id.

        Resolution order (first match wins):
          1. Explicit spec_reference passed in vals.
          2. customer_spec_id (this field) → format "code Rev rev".
          3. SO line x_fc_customer_spec_id (with print_on_cert=True).
          4. Existing legacy fall-back lives in the parent module
             (reads x_fc_coating_config_id.spec_reference). Untouched.
        """
        SaleOrder = self.env['sale.order']
        for vals in vals_list:
            if vals.get('spec_reference'):
                continue
            spec = False
            # 2. Explicit spec on the cert.
            if vals.get('customer_spec_id'):
                spec = self.env['fusion.plating.customer.spec'].browse(
                    vals['customer_spec_id'],
                ).exists()
            # 3. SO line's spec.
            if not spec and vals.get('sale_order_id'):
                so = SaleOrder.browse(vals['sale_order_id'])
                if 'x_fc_customer_spec_id' in so.order_line._fields:
                    spec = so.order_line.mapped(
                        'x_fc_customer_spec_id',
                    ).filtered('print_on_cert')[:1]
                    if spec and not vals.get('customer_spec_id'):
                        vals['customer_spec_id'] = spec.id
            if spec:
                ref = spec.code or ''
                if spec.revision:
                    ref = f'{ref} Rev {spec.revision}' if ref else f'Rev {spec.revision}'
                if ref:
                    vals['spec_reference'] = ref
        return super().create(vals_list)