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

from odoo import models, fields, _

class PosOrder(models.Model):
    _inherit = 'pos.order'

    def validate_coupon_programs(self, point_changes, new_codes):
        res = super().validate_coupon_programs(point_changes, new_codes)
        if not res.get('successful'):
            return res
        
        point_changes = {int(k): v for k, v in point_changes.items()}
        coupon_ids_from_pos = set(point_changes.keys())
        coupons = self.env['loyalty.card'].browse(coupon_ids_from_pos).exists()
        
        for coupon in coupons:
            if not coupon.limit:
                continue
            
            # Check if this coupon is being used for redemption (points are spent, i.e., point_change < 0)
            # Or if it's 0 (maybe a reward that doesn't cost points?), but wait, point_changes is negative when spent.
            if point_changes.get(coupon.id, 0) >= 0:
                continue
            
            # Calculate usages
            domain = [('card_id', '=', coupon.id), ('used', '>', 0)]
            today = fields.Datetime.now()
            
            if coupon.limit_period == 'day':
                domain.append(('create_date', '>=', today.replace(hour=0, minute=0, second=0, microsecond=0)))
            elif coupon.limit_period == 'month':
                domain.append(('create_date', '>=', today.replace(day=1, hour=0, minute=0, second=0, microsecond=0)))
            elif coupon.limit_period == 'year':
                domain.append(('create_date', '>=', today.replace(month=1, day=1, hour=0, minute=0, second=0, microsecond=0)))
            
            usage_count = self.env['loyalty.history'].search_count(domain)
            
            if usage_count >= coupon.limit_count:
                return {
                    'successful': False,
                    'payload': {
                        'message': _('The loyalty card %s has reached its usage limit of %s per %s.', coupon.code, coupon.limit_count, coupon.limit_period),
                    }
                }
                
        return res