# -*- coding: utf-8 -*-
from odoo import api, models, _

class MailThread(models.AbstractModel):
    _inherit = 'mail.thread'

    def unlink(self):
        """ Override unlink to create a persistent audit log record before deletion.
        The audit log will have res_id=0 to ensure it survives the standard unlink process.
        """
        audit_models = (
            'account.move', 'account.account', 'account.tax', 'res.partner', 'res.company',
            'mrp.production', 'mrp.bom', 'stock.picking', 'stock.move', 'product.template', 'product.product',
            'purchase.order', 'sale.order', 'hr.employee', 'product.category', 'stock.lot'
        )
        
        if self._name in audit_models:
            for record in self:
                # Get basic info while record still exists
                record_id = record.id
                record_name = record.display_name or _('Unknown Record')
                company_id = getattr(record, 'company_id', self.env.company).id
                
                # Create the persistent audit log
                self.env['mail.message'].sudo().create({
                    'model': self._name,
                    'res_id': 0, # Persistent ID (not linked to an existing record)
                    'message_type': 'notification',
                    'subject': _('Record Unlinked: %s', record_name),
                    'body': _(
                        '<p>The following record was unlinked by <b>%s</b>:</p>'
                        '<ul>'
                        '<li><b>Model:</b> %s</li>'
                        '<li><b>Technical ID:</b> %s</li>'
                        '<li><b>Display Name:</b> %s</li>'
                        '</ul>',
                        self.env.user.name,
                        self._name,
                        record_id,
                        record_name
                    ),
                    'author_id': self.env.user.partner_id.id,
                    'record_company_id': company_id,
                })
        
        return super(MailThread, self).unlink()