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


class CommunityBenefitRedemption(models.Model):
    _name = 'community.benefit.redemption'
    _description = 'Benefit Redemption'
    _order = 'date desc'

    member_id = fields.Many2one('res.partner', string='Member', required=True)
    benefit_id = fields.Many2one('community.benefit', required=True)
    date = fields.Datetime(default=fields.Datetime.now, required=True)
    verified_by = fields.Many2one('res.users', default=lambda self: self.env.user)
    notes = fields.Text()

    @api.constrains('member_id', 'benefit_id')
    def _check_member_entitled(self):
        for redemption in self:
            member = redemption.member_id
            if member.membership_state not in ('active', 'renewal_due'):
                raise ValidationError(
                    f"{member.name} does not have an active membership - reusing the same check as the "
                    f"membership QR verification page. Redemption refused."
                )
            if not redemption.benefit_id.is_entitled(member):
                raise ValidationError(
                    f"{member.name}'s membership tier is not entitled to this benefit."
                )