# pyrefly: ignore [missing-import]
from odoo import api, fields, models
# pyrefly: ignore [missing-import]
from odoo.exceptions import ValidationError


class EducationStudentRefund(models.Model):
    _name = 'education.student.refund'
    _description = 'Student Fee Refund'
    _order = 'id desc'

    student_id = fields.Many2one('education.student', string='Student', compute='_compute_student', store=True, index=True)
    payment_id = fields.Many2one('education.student.payment', string='Original Payment', required=True, domain="[('status', '=', 'confirmed')]", index=True)
    
    currency_id = fields.Many2one(
        'res.currency',
        string='Currency',
        required=True,
        default=lambda self: self.env.company.currency_id,
    )
    amount = fields.Monetary(string='Refund Amount', required=True, currency_field='currency_id', default=0.0)
    reason = fields.Text(string='Reason for Refund', required=True)
    status = fields.Selection([
        ('draft', 'Draft'),
        ('approved', 'Approved'),
        ('rejected', 'Rejected')
    ], string='Status', default='draft', required=True, index=True)
    active = fields.Boolean(default=True)
    company_id = fields.Many2one(
        'res.company',
        string='Company',
        required=True,
        default=lambda self: self.env.company,
        index=True,
    )

    @api.depends('payment_id')
    def _compute_student(self):
        for rec in self:
            rec.student_id = rec.payment_id.student_id if rec.payment_id else False

    @api.constrains('amount', 'payment_id')
    def _check_refund_amount(self):
        for rec in self:
            if rec.amount <= 0:
                raise ValidationError('Refund amount must be positive.')
            if rec.payment_id and rec.amount > rec.payment_id.amount:
                raise ValidationError(f'Refund amount ({rec.amount}) cannot exceed original payment amount ({rec.payment_id.amount}).')

    def action_approve(self):
        for rec in self:
            if rec.status == 'approved':
                continue
            
            # Reversing credit (refund debit)
            self.env['education.student.ledger'].create({
                'student_id': rec.student_id.id,
                'date': fields.Date.today(),
                'ref': f"REF/{rec.id}",
                'description': f"Refund Approved - Original Payment Receipt: {rec.payment_id.receipt_number}",
                'debit': rec.amount,
                'credit': 0.0,
                'status': 'outstanding',
                'company_id': rec.company_id.id,
            })
            rec.status = 'approved'

    def action_reject(self):
        for rec in self:
            rec.status = 'rejected'