from odoo import fields, models


class CommunityBenefit(models.Model):
    _name = 'community.benefit'
    _description = 'Membership Benefit'
    _order = 'name'

    name = fields.Char(required=True)
    benefit_partner_id = fields.Many2one('community.benefit.partner', string='Benefit Centre', required=True)
    description = fields.Html()
    tier_ids = fields.Many2many('community.membership.tier', string='Eligible Tiers')
    discount_type = fields.Selection(
        [('percent', 'Percentage'), ('amount', 'Fixed Amount'), ('perk', 'Perk (non-monetary)')],
        default='percent', required=True,
    )
    value = fields.Float(help="Percentage or fixed amount, depending on Discount Type. Ignored for 'Perk'.")
    valid_from = fields.Date()
    valid_to = fields.Date()
    active = fields.Boolean(default=True)

    def _is_valid_today(self):
        self.ensure_one()
        today = fields.Date.context_today(self)
        if self.valid_from and today < self.valid_from:
            return False
        if self.valid_to and today > self.valid_to:
            return False
        return True

    def is_entitled(self, partner):
        """Whether the given res.partner is entitled to this benefit right now."""
        self.ensure_one()
        if not self.active or not self._is_valid_today():
            return False
        if partner.membership_state not in ('active', 'renewal_due'):
            return False
        return partner.membership_tier_id in self.tier_ids

    @staticmethod
    def _entitled_domain_for_partner(partner):
        return [
            ('tier_ids', 'in', [partner.membership_tier_id.id]),
            ('active', '=', True),
        ]