<?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
*/

/**
 * @since 1.5.0
 */
class SupplyOrderCore extends ObjectModel
{
	/**
	 * @var int Supplier
	 */
	public $id_supplier;

	/**
	 * @var string Supplier Name
	 */
	public $supplier_name;

	/**
	 * @var int The language id used on the delivery note
	 */
	public $id_lang;

	/**
	 * @var int Warehouse where products will be delivered
	 */
	public $id_warehouse;

	/**
	 * @var int Current state of the order
	 */
	public $id_supply_order_state;

	/**
	 * @var int Currency used for the order
	 */
	public $id_currency;

	/**
	 * @var int Currency used by default in main global configuration (i.e. by default for all shops)
	 */
	public $id_ref_currency;

	/**
	 * @var string Reference of the order
	 */
	public $reference;

	/**
	 * @var string Date when added
	 */
	public $date_add;

	/**
	 * @var string Date when updated
	 */
	public $date_upd;

	/**
	 * @var string Expected delivery date
	 */
	public $date_delivery_expected;

	/**
	 * @var float Total price without tax
	 */
	public $total_te = 0;

	/**
	 * @var float Total price after discount, without tax
	 */
	public $total_with_discount_te = 0;

	/**
	 * @var float Total price with tax
	 */
	public $total_ti = 0;

	/**
	 * @var float Total tax value
	 */
	public $total_tax = 0;

	/**
	 * @var float Supplier discount rate (for the whole order)
	 */
	public $discount_rate = 0;

	/**
	 * @var float Supplier discount value without tax (for the whole order)
	 */
	public $discount_value_te = 0;

	/**
	 * @var int Tells if this order is a template
	 */
	public $is_template = 0;

	/**
	 * @see ObjectModel::$definition
	 */
	public static $definition = array(
		'table' => 'supply_order',
		'primary' => 'id_supply_order',
		'fields' => array(
			'id_supplier' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'supplier_name' => 			array('type' => self::TYPE_STRING, 'validate' => 'isCatalogName', 'required' => false),
			'id_lang' => 				array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_warehouse' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_supply_order_state' => 	array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_currency' => 			array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'id_ref_currency' => 		array('type' => self::TYPE_INT, 'validate' => 'isUnsignedId', 'required' => true),
			'reference' => 				array('type' => self::TYPE_STRING, 'validate' => 'isGenericName', 'required' => true),
			'date_delivery_expected' => array('type' => self::TYPE_DATE, 'validate' => 'isDate', 'required' => true),
			'total_te' => 				array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice'),
			'total_with_discount_te' => array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice'),
			'total_ti' => 				array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice'),
			'total_tax' =>				array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice'),
			'discount_rate' => 			array('type' => self::TYPE_FLOAT, 'validate' => 'isFloat', 'required' => false),
			'discount_value_te' => 		array('type' => self::TYPE_FLOAT, 'validate' => 'isPrice'),
			'is_template' => 			array('type' => self::TYPE_BOOL, 'validate' => 'isBool'),
			'date_add' => 				array('type' => self::TYPE_DATE, 'validate' => 'isDate'),
			'date_upd' => 				array('type' => self::TYPE_DATE, 'validate' => 'isDate'),
		),
	);

	/**
	 * @see ObjectModel::$webserviceParameters
	 */
 	protected $webserviceParameters = array(
 		'fields' => array(
 			'id_supplier' => array('xlink_resource' => 'suppliers'),
 			'id_lang' => array('xlink_resource' => 'languages'),
 			'id_warehouse' => array('xlink_resource' => 'warehouses'),
 			'id_supply_order_state' => array('xlink_resource' => 'supply_order_states'),
 			'id_currency' => array('xlink_resource' => 'currencies'),
 		),
 		'hidden_fields' => array(
 			'id_ref_currency',
 		),
 		'associations' => array(
			'supply_order_details' => array(
				'resource' => 'supply_order_details',
				'fields' => array(
					'id' => array(),
 					'id_product' => array(),
 					'id_product_attribute' => array(),
 					'supplier_reference' => array(),
 					'product_name' => array(),
				),
			),
		),
 	);

	/**
	 * @see ObjectModel::update()
	 */
	public function update($null_values = false)
	{
		$this->calculatePrices();

		$res = parent::update($null_values);

		if ($res && !$this->is_template)
			$this->addHistory();

		return $res;
	}

	/**
	 * @see ObjectModel::add()
	 */
	public function add($autodate = true, $null_values = false)
	{
		$this->calculatePrices();

		$res = parent::add($autodate, $null_values);

		if ($res && !$this->is_template)
			$this->addHistory();

		return $res;
	}

	/**
	 * Checks all products in this order and calculate prices
	 * Applies the global discount if necessary
	 */
	protected function calculatePrices()
	{
		$this->total_te = 0;
		$this->total_with_discount_te = 0;
		$this->total_tax = 0;
		$this->total_ti = 0;
		$is_discount = false;

		if (is_numeric($this->discount_rate) && (float)$this->discount_rate >= 0)
			$is_discount = true;

		// gets all product entries in this order
		$entries = $this->getEntriesCollection();

		foreach ($entries as $entry)
		{
			// applys global discount rate on each product if possible
			if ($is_discount)
				$entry->applyGlobalDiscount((float)$this->discount_rate);

			// adds new prices to the total
			$this->total_te += $entry->price_with_discount_te;
			$this->total_with_discount_te += $entry->price_with_order_discount_te;
			$this->total_tax += $entry->tax_value_with_order_discount;
			$this->total_ti = $this->total_tax + $this->total_with_discount_te;
		}

		// applies global discount rate if possible
		if ($is_discount)
			$this->discount_value_te = $this->total_te - $this->total_with_discount_te;
	}

	/**
	 * Retrieves the product entries for the current order
	 *
	 * @param int $id_lang Optional Id Lang - Uses Context::language::id by default
	 * @return array
	 */
	public function getEntries($id_lang = null)
	{
		if ($id_lang == null)
			$id_lang = Context::getContext()->language->id;

		// build query
		$query = new DbQuery();

		$query->select('
			s.*,
			IFNULL(CONCAT(pl.name, \' : \', GROUP_CONCAT(agl.name, \' - \', al.name SEPARATOR \', \')), pl.name) as name_displayed');

		$query->from('supply_order_detail', 's');

		$query->innerjoin('product_lang', 'pl', 'pl.id_product = s.id_product AND pl.id_lang = '.$id_lang);

		$query->leftjoin('product', 'p', 'p.id_product = s.id_product');
		$query->leftjoin('product_attribute_combination', 'pac', 'pac.id_product_attribute = s.id_product_attribute');
		$query->leftjoin('attribute', 'atr', 'atr.id_attribute = pac.id_attribute');
		$query->leftjoin('attribute_lang', 'al', 'al.id_attribute = atr.id_attribute AND al.id_lang = '.$id_lang);
		$query->leftjoin('attribute_group_lang', 'agl', 'agl.id_attribute_group = atr.id_attribute_group AND agl.id_lang = '.$id_lang);

		$query->where('s.id_supply_order = '.(int)$this->id);

		$query->groupBy('s.id_supply_order_detail');

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

	/**
	 * Retrieves the details entries (i.e. products) collection for the current order
	 *
	 * @return PrestaShopCollection Collection of SupplyOrderDetail
	 */
	public function getEntriesCollection()
	{
		$details = new PrestaShopCollection('SupplyOrderDetail');
		$details->where('id_supply_order', '=', $this->id);
		return $details;
	}


	/**
	 * Check if the order has entries
	 *
	 * @return bool Has/Has not
	 */
	public function hasEntries()
	{
		$query = new DbQuery();
		$query->select('COUNT(*)');
		$query->from('supply_order_detail', 's');
		$query->where('s.id_supply_order = '.(int)$this->id);

		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query) > 0);
	}

	/**
	 * Check if the current state allows to edit the current order
	 *
	 * @return bool
	 */
	public function isEditable()
	{
		$query = new DbQuery();
		$query->select('s.editable');
		$query->from('supply_order_state', 's');
		$query->where('s.id_supply_order_state = '.(int)$this->id_supply_order_state);

		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query) == 1);
	}

	/**
	 * Checks if the current state allows to generate a delivery note for this order
	 *
	 * @return bool
	 */
	public function isDeliveryNoteAvailable()
	{
		$query = new DbQuery();
		$query->select('s.delivery_note');
		$query->from('supply_order_state', 's');
		$query->where('s.id_supply_order_state = '.(int)$this->id_supply_order_state);

		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query) == 1);
	}

	/**
	 * Checks if the current state allows to add products in stock
	 *
	 * @return bool
	 */
	public function isInReceiptState()
	{
		$query = new DbQuery();
		$query->select('s.receipt_state');
		$query->from('supply_order_state', 's');
		$query->where('s.id_supply_order_state = '.(int)$this->id_supply_order_state);

		return (Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query) == 1);
	}

	/**
	 * Historizes the order : its id, its state, and the employee responsible for the current action
	 */
	protected function addHistory()
	{
		$context = Context::getContext();
		$history = new SupplyOrderHistory();
		$history->id_supply_order = $this->id;
		$history->id_state = $this->id_supply_order_state;
		$history->id_employee = (int)$context->employee->id;
		$history->employee_firstname = pSQL($context->employee->firstname);
		$history->employee_lastname = pSQL($context->employee->lastname);

		$history->save();
	}

	/**
	 * Removes all products from the order
	 */
	public function resetProducts()
	{
		$products = $this->getEntriesCollection();

		foreach ($products as $p)
			$p->delete();
	}

	/**
	 * For a given $id_warehouse, tells if it has pending supply orders
	 *
	 * @param int $id_warehouse
	 * @return bool
	 */
	public static function warehouseHasPendingOrders($id_warehouse)
	{
		if (!$id_warehouse)
			return false;

		$query = new DbQuery();
		$query->select('COUNT(so.id_supply_order) as supply_orders');
		$query->from('supply_order', 'so');
		$query->leftJoin('supply_order_state', 'sos', 'so.id_supply_order_state = sos.id_supply_order_state');
		$query->where('sos.enclosed != 1');
		$query->where('so.id_warehouse = '.(int)$id_warehouse);

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);
		return ($res > 0);
	}

	/**
	 * For a given $id_supplier, tells if it has pending supply orders
	 *
	 * @param int $id_supplier Id Supplier
	 * @return bool
	 */
	public static function supplierHasPendingOrders($id_supplier)
	{
		if (!$id_supplier)
			return false;

		$query = new DbQuery();
		$query->select('COUNT(so.id_supply_order) as supply_orders');
		$query->from('supply_order', 'so');
		$query->leftJoin('supply_order_state', 'sos', 'so.id_supply_order_state = sos.id_supply_order_state');
		$query->where('sos.enclosed != 1');
		$query->where('so.id_supplier = '.(int)$id_supplier);

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);
		return ($res > 0);
	}

	/**
	 * For a given id or reference, tells if the supply order exists
	 *
	 * @param int|string $match Either the reference of the order, or the Id of the order
	 * @return int SupplyOrder Id
	 */
	public static function exists($match)
	{
		if (!$match)
			return false;

		$query = new DbQuery();
		$query->select('id_supply_order');
		$query->from('supply_order', 'so');
		$query->where('so.id_supply_order = '.(int)$match.' OR so.reference = "'.pSQL($match).'"');

		$res = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);
		return ((int)$res);
	}

	/**
	 * For a given reference, returns the corresponding supply order
	 *
	 * @param string $reference Reference of the order
	 * @return bool|SupplyOrder
	 */
	public static function getSupplyOrderByReference($reference)
	{
		if (!$reference)
			return false;

		$query = new DbQuery();
		$query->select('id_supply_order');
		$query->from('supply_order', 'so');
		$query->where('so.reference = "'.pSQL($reference).'"');
		$id_supply_order = (int)Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);

		if (!$id_supply_order)
			return false;

		$supply_order = new SupplyOrder($id_supply_order);
		return $supply_order;
	}

	/**
	 * @see ObjectModel::hydrate()
	 */
	public function hydrate(array $data, $id_lang = null)
	{
		$this->id_lang = $id_lang;
		if (isset($data[$this->def['primary']]))
			$this->id = $data[$this->def['primary']];
		foreach ($data as $key => $value)
		{
			if (array_key_exists($key, $this))
			{
				// formats prices and floats
				if ($this->def['fields'][$key]['validate'] == 'isFloat' ||
					$this->def['fields'][$key]['validate'] == 'isPrice')
					$value = Tools::ps_round($value, 6);
				$this->$key = $value;
			}
		}
	}


	/**
	 * Gets the reference of a given order
	 *
	 * @param int $id_supply_order
	 * @return bool|string
	 */
	public static function getReferenceById($id_supply_order)
	{
		if (!$id_supply_order)
			return false;

		$query = new DbQuery();
		$query->select('so.reference');
		$query->from('supply_order', 'so');
		$query->where('so.id_supply_order = '.(int)$id_supply_order);
		$ref = Db::getInstance(_PS_USE_SQL_SLAVE_)->getValue($query);

		return (pSQL($ref));
	}

	public function getAllExpectedQuantity()
	{
		return Db::getInstance()->getValue('
			SELECT SUM(`quantity_expected`)
			FROM `'._DB_PREFIX_.'supply_order_detail`
			WHERE `id_supply_order` = '.(int)$this->id
		);
	}

	public function getAllReceivedQuantity()
	{
		return Db::getInstance()->getValue('
			SELECT SUM(`quantity_received`)
			FROM `'._DB_PREFIX_.'supply_order_detail`
			WHERE `id_supply_order` = '.(int)$this->id
		);
	}

	public function getAllPendingQuantity()
	{
		return Db::getInstance()->getValue('
			SELECT (SUM(`quantity_expected`) - SUM(`quantity_received`))
			FROM `'._DB_PREFIX_.'supply_order_detail`
			WHERE `id_supply_order` = '.(int)$this->id
		);
	}

	/*********************************\
	 *
	 * Webservices Specific Methods
	 *
	 *********************************/

	/**
	 * Webservice : gets the ids supply_order_detail associated to this order
	 *
	 * @return array
	 */
	public function getWsSupplyOrderDetails()
	{
		$query = new DbQuery();
		$query->select('sod.id_supply_order_detail as id, sod.id_product,
						sod.id_product_attribute,
					    sod.name as product_name, supplier_reference');
		$query->from('supply_order_detail', 'sod');
		$query->where('id_supply_order = '.(int)$this->id);

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

}