<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/


class TaxCore extends ObjectModel
{
 	/** @var string Name */
	public $name;

	/** @var float Rate (%) */
	public $rate;

	/** @var bool active state */
	public $active;

	/** @var boolean true if the tax has been historized */
	public $deleted = 0;

	/**
	 * @see ObjectModel::$definition
	 */
	public static $definition = array(
		'table' => 'tax',
		'primary' => 'id_tax',
		'multilang' => true,
		'fields' => array(
			'rate' => 			array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => true),
			'active' => 		array('type' => self::TYPE_BOOL),
			'deleted' => 		array('type' => self::TYPE_BOOL),

			// Lang fields
			'name' => 			array('type' => self::TYPE_STRING, 'lang' => true, 'validate' => 'isGenericName', 'required' => true, 'size' => 32),
		),
	);


	protected static $_product_country_tax = array();
	protected static $_product_tax_via_rules = array();

	protected	$webserviceParameters = array(
		'objectsNodeName' => 'taxes',
	);

	public function delete()
	{
		/* Clean associations */
		TaxRule::deleteTaxRuleByIdTax((int)$this->id);

		if ($this->isUsed())
			return $this->historize();
		else
			return parent::delete();
	}

	/**
	 * Save the object with the field deleted to true
	 *
	 *  @return bool
	 */
	public function historize()
	{
		$this->deleted = true;
		return parent::update();
	}

	public function toggleStatus()
	{
	    if (parent::toggleStatus())
            return $this->_onStatusChange();

        return false;
	}

	public function update($nullValues = false)
	{
		if (!$this->deleted && $this->isUsed())
		{
			$historized_tax = new Tax($this->id);
			$historized_tax->historize();

			// remove the id in order to create a new object
			$this->id = 0;
			$res = $this->add();

			// change tax id in the tax rule table
			$res &= TaxRule::swapTaxId($historized_tax->id, $this->id);
			return $res;
		} 
		elseif (parent::update($nullValues))
			return $this->_onStatusChange();

		return false;
	}

	protected function _onStatusChange()
	{
        if (!$this->active)
            return TaxRule::deleteTaxRuleByIdTax($this->id);

        return true;
	}

	/**
	 * Returns true if the tax is used in an order details
	 *
	 * @return bool
	 */
	public function isUsed()
	{
		return Db::getInstance()->getValue('
		SELECT `id_tax`
		FROM `'._DB_PREFIX_.'order_detail_tax`
		WHERE `id_tax` = '.(int)$this->id
		);
	}

	/**
	* Get all available taxes
	*
	* @return array Taxes
	*/
	public static function getTaxes($id_lang = false, $active_only = true)
	{
		$sql = new DbQuery();
		$sql->select('t.id_tax, t.rate');
		$sql->from('tax', 't');
		$sql->where('t.`deleted` != 1');

		if ($id_lang)
		{
			$sql->select('tl.name, tl.id_lang');
			$sql->leftJoin('tax_lang', 'tl', 't.`id_tax` = tl.`id_tax` AND tl.`id_lang` = '.(int)$id_lang);
			$sql->orderBy('`name` ASC');
		}

		if ($active_only)
			$sql->where('t.`active` = 1');

		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($sql);
	}

	public static function excludeTaxeOption()
	{
		static $ps_tax = null;
		if ($ps_tax === null)
			$ps_tax = Configuration::get('PS_TAX');

		return !$ps_tax;
	}

	/**
	* Return the tax id associated to the specified name
	*
	* @param string $tax_name
	* @param boolean $active (true by default)
	*/
	public static function getTaxIdByName($tax_name, $active = 1)
	{
		$tax = Db::getInstance(_PS_USE_SQL_SLAVE_)->getRow('
			SELECT t.`id_tax`
			FROM `'._DB_PREFIX_.'tax` t
			LEFT JOIN `'._DB_PREFIX_.'tax_lang` tl ON (tl.id_tax = t.id_tax)
			WHERE tl.`name` = \''.pSQL($tax_name).'\' '.
			($active == 1 ? ' AND t.`active` = 1' : ''));

		return $tax ? (int)($tax['id_tax']) : false;
	}

	/**
	* Returns the ecotax tax rate
	*
	* @param id_address
	* @return float $tax_rate
	*/
	public static function getProductEcotaxRate($id_address = null)
	{
		$address = Address::initialize($id_address);

		$tax_manager = TaxManagerFactory::getManager($address, (int)Configuration::get('PS_ECOTAX_TAX_RULES_GROUP_ID'));
		$tax_calculator = $tax_manager->getTaxCalculator();

		return $tax_calculator->getTotalRate();
	}

	/**
	* Returns the carrier tax rate
	*
	* @param id_address
	* @return float $tax_rate
	*/
	public static function getCarrierTaxRate($id_carrier, $id_address = null)
	{
		$address = Address::initialize($id_address);
		$id_tax_rules = (int)Carrier::getIdTaxRulesGroupByIdCarrier((int)$id_carrier);

		$tax_manager = TaxManagerFactory::getManager($address, $id_tax_rules);
		$tax_calculator = $tax_manager->getTaxCalculator();

		return $tax_calculator->getTotalRate();
	}

	/**
	 * Return the product tax rate using the tax rules system
	 *
	 * @param integer $id_product
	 * @param integer $id_country
	 * @return Tax
	 *
	 * @deprecated since 1.5
	 */
	public static function getProductTaxRateViaRules($id_product, $id_country, $id_state, $zipcode)
	{
		Tools::displayAsDeprecated();

		if (!isset(self::$_product_tax_via_rules[$id_product.'-'.$id_country.'-'.$id_state.'-'.$zipcode]))
		{
		    $tax_rate = TaxRulesGroup::getTaxesRate((int)Product::getIdTaxRulesGroupByIdProduct((int)$id_product), (int)$id_country, (int)$id_state, $zipcode);
		    self::$_product_tax_via_rules[$id_product.'-'.$id_country.'-'.$zipcode] = $tax_rate;
		}

		return self::$_product_tax_via_rules[$id_product.'-'.$id_country.'-'.$zipcode];
	}

	/**
	 * Returns the product tax
	 *
	 * @param integer $id_product
	 * @param integer $id_country
	 * @return Tax
	 */
	public static function getProductTaxRate($id_product, $id_address = null, Context $context = null)
	{
		if ($context == null)
			$context = Context::getContext();

		$address = Address::initialize($id_address);
		$id_tax_rules = (int)Product::getIdTaxRulesGroupByIdProduct($id_product, $context);

		$tax_manager = TaxManagerFactory::getManager($address, $id_tax_rules);
		$tax_calculator = $tax_manager->getTaxCalculator();

		return $tax_calculator->getTotalRate();
	}
}