# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

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


class Product(models.Model):
    _inherit = "product.product"
    _mail_post_access = 'read'

    website_id = fields.Many2one(related='product_tmpl_id.website_id', readonly=False)

    product_variant_image_ids = fields.One2many('product.image', 'product_variant_id', string="Extra Variant Images")

    website_url = fields.Char('Website URL', compute='_compute_product_website_url', help='The full URL to access the document through the website.')

    base_unit_count = fields.Float('Base Unit Count', required=True, default=1, help="Display base unit price on your eCommerce pages. Set to 0 to hide it for this product.")
    base_unit_id = fields.Many2one('website.base.unit', string='Custom Unit of Measure', help="Define a custom unit to display in the price per unit of measure field.")
    base_unit_price = fields.Monetary("Price Per Unit", currency_field="currency_id", compute="_compute_base_unit_price")
    base_unit_name = fields.Char(compute='_compute_base_unit_name', help='Displays the custom unit for the products if defined or the selected unit of measure otherwise.')

    def _get_base_unit_price(self, price):
        self.ensure_one()
        return self.base_unit_count and price / self.base_unit_count

    @api.depends('lst_price', 'base_unit_count')
    def _compute_base_unit_price(self):
        for product in self:
            if not product.id:
                product.base_unit_price = 0
            else:
                product.base_unit_price = product._get_base_unit_price(product.lst_price)

    @api.depends('uom_name', 'base_unit_id')
    def _compute_base_unit_name(self):
        for product in self:
            product.base_unit_name = product.base_unit_id.name or product.uom_name

    @api.constrains('base_unit_count')
    def _check_base_unit_count(self):
        if any(product.base_unit_count < 0 for product in self):
            raise ValidationError(_('The value of Base Unit Count must be greater than 0. Use 0 to hide the price per unit on this product.'))

    @api.depends_context('lang')
    @api.depends('product_tmpl_id.website_url', 'product_template_attribute_value_ids')
    def _compute_product_website_url(self):
        for product in self:
            attributes = ','.join(str(x) for x in product.product_template_attribute_value_ids.ids)
            product.website_url = "%s#attr=%s" % (product.product_tmpl_id.website_url, attributes)

    def _prepare_variant_values(self, combination):
        variant_dict = super()._prepare_variant_values(combination)
        variant_dict['base_unit_count'] = self.base_unit_count
        return variant_dict

    def website_publish_button(self):
        self.ensure_one()
        return self.product_tmpl_id.website_publish_button()

    def open_website_url(self):
        self.ensure_one()
        res = self.product_tmpl_id.open_website_url()
        res['url'] = self.website_url
        return res

    def _get_images(self):
        """Return a list of records implementing `image.mixin` to
        display on the carousel on the website for this variant.

        This returns a list and not a recordset because the records might be
        from different models (template, variant and image).

        It contains in this order: the main image of the variant (which will fall back on the main
        image of the template, if unset), the Variant Extra Images, and the Template Extra Images.
        """
        self.ensure_one()
        variant_images = list(self.product_variant_image_ids)
        template_images = list(self.product_tmpl_id.product_template_image_ids)
        return [self] + variant_images + template_images


    def _website_show_quick_add(self):
        website = self.env['website'].get_current_website()
        return self.sale_ok and (not website.prevent_zero_price_sale or self._get_contextual_price())

    def _is_add_to_cart_allowed(self):
        self.ensure_one()
        return self.user_has_groups('base.group_system') or (self.active and self.sale_ok and self.website_published)

    def _get_contextual_price_tax_selection(self):
        self.ensure_one()
        fpos_id = self.env['website'].sudo()._get_current_fiscal_position_id(self.env.user.partner_id)
        fiscal_position_sudo = self.env['account.fiscal.position'].sudo().browse(fpos_id)
        product_taxes = self.sudo().taxes_id.filtered(lambda x: x.company_id == self.env.company)
        return self.env['product.template']._price_with_tax_computed(
            self._get_contextual_price(),
            product_taxes,
            fiscal_position_sudo.map_tax(product_taxes),
            self.env.company.id,
            self.env['product.template']._get_contextual_pricelist(),
            self,
            self.env.user.partner_id,
        )