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

from odoo import models, fields, api
from odoo.fields import Domain

class LoyaltyReward(models.Model):
    _inherit = 'loyalty.reward'

    reward_product_applicability = fields.Selection([
        ('specific', 'Specific Product(s)'),
        ('cheapest', 'Cheapest Product on Order')
    ], string='Reward Product Applicability', default='specific', required=True)

    reward_product_category_id = fields.Many2one(
        'product.category', string='Reward Product Category',
        help='If specified, only products under this category (including subcategories) will be considered for the cheapest product reward.'
    )

    @api.depends('reward_product_id', 'reward_product_tag_id', 'reward_type', 'reward_product_applicability', 'reward_product_category_id')
    def _compute_multi_product(self):
        super()._compute_multi_product()
        for reward in self:
            if reward.reward_type == 'product' and reward.reward_product_applicability == 'cheapest':
                products = reward.reward_product_id + reward.reward_product_tag_id.product_ids.filtered(
                    lambda product: product.type != 'combo'
                )
                if reward.reward_product_category_id:
                    category_ids = self.env['product.category'].search([
                        ('id', 'child_of', reward.reward_product_category_id.ids)
                    ]).ids
                    cat_products = self.env['product.product'].search([
                        ('categ_id', 'in', category_ids)
                    ])
                    products |= cat_products.filtered(lambda product: product.type != 'combo')
                reward.multi_product = False
                reward.reward_product_ids = products

    @api.model
    def _load_pos_data_fields(self, config):
        fields = super()._load_pos_data_fields(config)
        if 'reward_product_applicability' not in fields:
            fields.append('reward_product_applicability')
        if 'reward_product_category_id' not in fields:
            fields.append('reward_product_category_id')
        return fields

    @api.model
    def _load_pos_data_domain(self, data, config):
        reward_product_tag_domain = [
            ('reward_product_tag_id', '!=', False),
            '|',
            ('reward_product_tag_id.product_template_ids.active', '=', True),
            ('reward_product_tag_id.product_product_ids.active', '=', True),
        ]
        return Domain.AND([
            [('program_id', 'in', config._get_program_ids().ids)],
            Domain.OR([
                [('reward_type', '!=', 'product')],
                [('reward_product_id.active', '=', True)],
                [('reward_product_applicability', '=', 'cheapest')],
                reward_product_tag_domain,
            ]),
        ])