# Part of Odoo. See LICENSE file for full copyright and licensing details.

from werkzeug.urls import url_join

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.')
    ribbon_id = fields.Many2one(string="Variant Ribbon", comodel_name='product.ribbon')

    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)
            url = product.product_tmpl_id.website_url
            if attributes:
                url = url_join(url, f"#attr={attributes}")
            product.website_url = url

    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 _get_combination_info_variant(self, **kwargs):
        """Return the variant info based on its combination.
        See `_get_combination_info` for more information.
        """
        self.ensure_one()
        return self.product_tmpl_id._get_combination_info(
            combination=self.product_template_attribute_value_ids,
            product_id=self.id,
            **kwargs)

    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()
        website = self.env['website'].get_current_website()
        fiscal_position_sudo = website.sudo().fiscal_position_id
        product_taxes = self.sudo().taxes_id._filter_taxes_by_company(self.env.company)
        return self.env['product.template']._apply_taxes_to_price(
            self._get_contextual_price(),
            website.currency_id,
            product_taxes,
            fiscal_position_sudo.map_tax(product_taxes),
            self,
        )