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

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


class PaymentDeductionLine(models.Model):
    _name = 'payment.deduction.line'
    _description = 'Payment Deduction Line'
    _order = 'sequence, id'

    sequence = fields.Integer(string='Sequence', default=10)
    payment_id = fields.Many2one(
        'account.payment',
        string='Payment',
        ondelete='cascade',
        index=True,
    )
    batch_payment_line_id = fields.Many2one(
        'account.batch.payment.line',
        string='Batch Payment Line',
        ondelete='cascade',
        index=True,
    )
    company_id = fields.Many2one(
        'res.company',
        compute='_compute_company_currency',
        store=True,
        readonly=True,
    )
    currency_id = fields.Many2one(
        'res.currency',
        compute='_compute_company_currency',
        store=True,
        readonly=True,
    )

    @api.depends('payment_id.company_id', 'payment_id.currency_id', 
                 'batch_payment_line_id.currency_id')
    def _compute_company_currency(self):
        for line in self:
            if line.payment_id:
                line.company_id = line.payment_id.company_id
                line.currency_id = line.payment_id.currency_id
            elif line.batch_payment_line_id:
                line.company_id = line.batch_payment_line_id.batch_payment_id.journal_id.company_id
                line.currency_id = line.batch_payment_line_id.currency_id
            else:
                line.company_id = self.env.company
                line.currency_id = self.env.company.currency_id
    amount_substract = fields.Monetary(
        string='Deduction Amount',
        currency_field='currency_id',
        required=True,
        help='Amount to be deducted from the payment (e.g., withholding tax, fees)',
    )
    substract_account_id = fields.Many2one(
        'account.account',
        string='Deduction Account',
        required=True,
        domain="[('account_type', 'not in', ['asset_cash', 'asset_cash_bank', 'asset_receivable', 'liability_payable']), ('deprecated', '=', False)]",
        help='Account where the deduction will be recorded (use tax payable or expense accounts, NOT payable/receivable accounts)',
    )
    name = fields.Char(
        string='Description',
        help='Optional description for this deduction',
    )

    @api.constrains('amount_substract')
    def _check_amount_substract(self):
        for line in self:
            if line.amount_substract <= 0:
                raise ValidationError(_("Deduction amount must be greater than zero."))

    @api.onchange('substract_account_id')
    def _onchange_substract_account_id(self):
        """Auto-fill description based on account name if not set"""
        if self.substract_account_id and not self.name:
            self.name = self.substract_account_id.name