# -*- coding: utf-8 -*-

from odoo import models, fields, api, _


class PaymentAmountFixWizard(models.TransientModel):
    _name = 'payment.amount.fix.wizard'
    _description = 'Fix Payment Amount Calculation'

    payment_ids = fields.Many2many(
        'account.payment',
        string='Payments to Fix',
        domain=[('amount_substract', '>', 0), ('state', '=', 'posted')],
        help='Payments with deductions that may have incorrect amounts'
    )
    
    @api.model
    def default_get(self, fields_list):
        """Pre-select payments that need fixing."""
        res = super().default_get(fields_list)
        
        # Find payments that might need fixing
        payments = self.env['account.payment'].search([
            ('amount_substract', '>', 0),
            ('state', '=', 'posted'),
        ])
        
        payments_to_fix = []
        for payment in payments:
            if payment.move_id:
                counterpart_lines = payment.move_id.line_ids.filtered(
                    lambda l: l.debit > 0 and l.account_id.account_type in ('liability_payable', 'expense')
                )
                if counterpart_lines:
                    correct_amount = counterpart_lines[0].debit
                    if abs(payment.amount - correct_amount) > 0.01:
                        payments_to_fix.append(payment.id)
        
        res['payment_ids'] = [(6, 0, payments_to_fix)]
        return res
    
    def action_fix_amounts(self):
        """Fix the selected payments."""
        fixed_count = 0
        
        for payment in self.payment_ids:
            if payment.move_id:
                counterpart_lines = payment.move_id.line_ids.filtered(
                    lambda l: l.debit > 0 and l.account_id.account_type in ('liability_payable', 'expense')
                )
                
                if counterpart_lines:
                    correct_amount = counterpart_lines[0].debit
                    if abs(payment.amount - correct_amount) > 0.01:
                        # Fix using SQL to avoid sync issues
                        payment.env.cr.execute(
                            "UPDATE account_payment SET amount = %s WHERE id = %s",
                            (correct_amount, payment.id)
                        )
                        payment.invalidate_recordset(['amount'])
                        payment._compute_final_payment_amount()
                        fixed_count += 1
        
        return {
            'type': 'ir.actions.client',
            'tag': 'display_notification',
            'params': {
                'title': _('Fix Complete'),
                'message': _('Fixed %d payments with incorrect amounts.') % fixed_count,
                'type': 'success',
            }
        }