<?php
/* Copyright (C) 2016		Marcos García			<marcosgdf@gmail.com>
 * Copyright (C) 2022   	Open-Dsi				<support@open-dsi.fr>
 * Copyright (C) 2024		Frédéric France			<frederic.france@free.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */

/**
 *	\file       htdocs/variants/class/ProductCombination2ValuePair.class.php
 *	\ingroup    variants
 *	\brief      File of the ProductCombination2ValuePair class
 */


/**
 * Class ProductCombination2ValuePair
 * Used to represent the relation between a variant and its attributes.
 *
 * Example: a product "shirt" has a variant "shirt XL white" linked to the attributes "size: XL" and "color: white".
 * This is represented with two ProductCombination2ValuePair objects:
 * - One for "size: XL":
 *     * $object->fk_prod_combination    ID of the ProductCombination object between product "shirt" and its variant "shirt XL white"
 *     * $object->fk_prod_attr           ID of the ProductAttribute object "size"
 *     * $object->fk_prod_attr_val       ID of the ProductAttributeValue object "XL"
 * - Another for "color: white":
 *     * $object->fk_prod_combination    ID of the ProductCombination object between product "shirt" and its variant "shirt XL white"
 *     * $object->fk_prod_attr           ID of the ProductAttribute object "color"
 *     * $object->fk_prod_attr_val       ID of the ProductAttributeValue object "white"
 */
class ProductCombination2ValuePair
{
	/**
	 * Database handler
	 * @var DoliDB
	 */
	private $db;

	/**
	 * ID of this ProductCombination2ValuePair
	 * @var int
	 */
	public $id;

	/**
	 * ID of the ProductCombination linked to this object
	 * (ex: ID of the ProductCombination between product "shirt" and its variant "shirt XL white")
	 * @var int
	 */
	public $fk_prod_combination;

	/**
	 * ID of the ProductAttribute linked to this object
	 * (ex: ID of the ProductAttribute "color")
	 * @var int
	 */
	public $fk_prod_attr;

	/**
	 * ID of the ProductAttributeValue linked to this object
	 * (ex: ID of the ProductAttributeValue "white")
	 * @var int
	 */
	public $fk_prod_attr_val;

	/**
	 * Error message
	 * @var string
	 */
	public $error;

	/**
	 * Array of error messages
	 * @var string[]
	 */
	public $errors = array();

	/**
	 * Constructor
	 *
	 * @param   DoliDB $db     Database handler
	 */
	public function __construct(DoliDB $db)
	{
		$this->db = $db;
	}

	/**
	 * Translates this class to a human-readable string
	 *
	 * @return string
	 */
	public function __toString()
	{
		require_once DOL_DOCUMENT_ROOT . '/variants/class/ProductAttributeValue.class.php';
		require_once DOL_DOCUMENT_ROOT . '/variants/class/ProductAttribute.class.php';

		$prodattr = new ProductAttribute($this->db);
		$prodattrval = new ProductAttributeValue($this->db);

		$prodattr->fetch($this->fk_prod_attr);
		$prodattrval->fetch($this->fk_prod_attr_val);

		return $prodattr->label . ': ' . $prodattrval->value;
	}

	/**
	 * Create a ProductCombination2ValuePair
	 *
	 * @param	User		$user		User that creates		//not used
	 * @return 	int						Return 1 if OK, -1 if KO
	 */
	public function create($user)
	{
		$sql = "INSERT INTO " . MAIN_DB_PREFIX . "product_attribute_combination2val
		(fk_prod_combination, fk_prod_attr, fk_prod_attr_val)
		VALUES(" . (int) $this->fk_prod_combination . ", " . (int) $this->fk_prod_attr . ", " . (int) $this->fk_prod_attr_val . ")";

		$query = $this->db->query($sql);

		if ($query) {
			$this->id = $this->db->last_insert_id(MAIN_DB_PREFIX . 'product_attribute_combination2val');

			return 1;
		}

		return -1;
	}

	/**
	 * Retrieve all ProductCombination2ValuePair linked to a given ProductCombination ID.
	 *
	 * @param   int          $fk_combination           ID of the ProductCombination
	 * @return  -1|ProductCombination2ValuePair[]      Return <0 if KO, array of ProductCombination2ValuePair if OK
	 */
	public function fetchByFkCombination($fk_combination)
	{
		$sql = "SELECT
        c.rowid,
        c2v.fk_prod_attr_val,
        c2v.fk_prod_attr,
        c2v.fk_prod_combination
        FROM " . MAIN_DB_PREFIX . "product_attribute c LEFT JOIN " . MAIN_DB_PREFIX . "product_attribute_combination2val c2v ON c.rowid = c2v.fk_prod_attr
        WHERE c2v.fk_prod_combination = " . (int) $fk_combination;

		$sql .= $this->db->order('c.position', 'asc');

		$query = $this->db->query($sql);

		if (!$query) {
			return -1;
		}

		$return = array();

		while ($obj = $this->db->fetch_object($query)) {
			$tmp = new ProductCombination2ValuePair($this->db);
			$tmp->fk_prod_attr_val = $obj->fk_prod_attr_val;
			$tmp->fk_prod_attr = $obj->fk_prod_attr;
			$tmp->fk_prod_combination = $obj->fk_prod_combination;
			$tmp->id = $obj->rowid;

			$return[] = $tmp;
		}

		return $return;
	}

	/**
	 * Delete all ProductCombination2ValuePair linked to a given ProductCombination ID.
	 *
	 * @param       int					$fk_combination	ID of the ProductCombination
	 * @return      int<-1,-1>|int<1,1>					-1 if KO, 1 if OK
	 */
	public function deleteByFkCombination($fk_combination)
	{
		$sql = "DELETE FROM " . MAIN_DB_PREFIX . "product_attribute_combination2val WHERE fk_prod_combination = " . (int) $fk_combination;

		if ($this->db->query($sql)) {
			return 1;
		}

		return -1;
	}
}