<?php
/**
 * Magento
 *
 * 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@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Adminhtml
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Abstract items renderer
 *
 * @category    Mage
 * @package     Mage_Adminhtml
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class  Mage_Adminhtml_Block_Sales_Items_Abstract extends Mage_Adminhtml_Block_Template
{
    /**
     * Renderers with render type key
     * block    => the block name
     * template => the template file
     * renderer => the block object
     *
     * @var array
     */
    protected $_itemRenders = array();

    /**
     * Renderers for other column with column name key
     * block    => the block name
     * template => the template file
     * renderer => the block object
     *
     * @var array
     */
    protected $_columnRenders = array();

    /**
     * Flag - if it is set method canEditQty will return value of it
     *
     * @var boolean | null
     */
    protected $_canEditQty = null;

    /**
     * Init block
     *
     */
    protected function _construct()
    {
        $this->addColumnRender('qty', 'adminhtml/sales_items_column_qty', 'sales/items/column/qty.phtml');
        $this->addColumnRender('name', 'adminhtml/sales_items_column_name', 'sales/items/column/name.phtml');
        parent::_construct();
    }

    /**
     * Add item renderer
     *
     * @param string $type
     * @param string $block
     * @param string $template
     * @return Mage_Adminhtml_Block_Sales_Items_Abstract
     */
    public function addItemRender($type, $block, $template)
    {
        $this->_itemRenders[$type] = array(
            'block'     => $block,
            'template'  => $template,
            'renderer'  => null
        );
        return $this;
    }

    /**
     * Add column renderer
     *
     * @param string $column
     * @param string $block
     * @param string $template
     * @return Mage_Adminhtml_Block_Sales_Items_Abstract
     */
    public function addColumnRender($column, $block, $template, $type=null)
    {
        if (!is_null($type)) {
            $column .= '_' . $type;
        }
        $this->_columnRenders[$column] = array(
            'block'     => $block,
            'template'  => $template,
            'renderer'  => null
        );
        return $this;
    }

    /**
     * Retrieve item renderer block
     *
     * @param string $type
     * @return Mage_Core_Block_Abstract
     */
    public function getItemRenderer($type)
    {
        if (!isset($this->_itemRenders[$type])) {
            $type = 'default';
        }
        if (is_null($this->_itemRenders[$type]['renderer'])) {
            $this->_itemRenders[$type]['renderer'] = $this->getLayout()
                ->createBlock($this->_itemRenders[$type]['block'])
                ->setTemplate($this->_itemRenders[$type]['template']);
            foreach ($this->_columnRenders as $columnType=>$renderer) {
                $this->_itemRenders[$type]['renderer']->addColumnRender($columnType, $renderer['block'], $renderer['template']);
            }
        }
        return $this->_itemRenders[$type]['renderer'];
    }

    /**
     * Retrieve column renderer block
     *
     * @param string $column
     * @param string $compositePart
     * @return Mage_Core_Block_Abstract
     */
    public function getColumnRenderer($column, $compositePart='')
    {
        if (isset($this->_columnRenders[$column . '_' . $compositePart])) {
            $column .= '_' . $compositePart;
        }
        if (!isset($this->_columnRenders[$column])) {
            return false;
        }
        if (is_null($this->_columnRenders[$column]['renderer'])) {
            $this->_columnRenders[$column]['renderer'] = $this->getLayout()
                ->createBlock($this->_columnRenders[$column]['block'])
                ->setTemplate($this->_columnRenders[$column]['template'])
                ->setRenderedBlock($this);
        }
        return $this->_columnRenders[$column]['renderer'];
    }

    /**
     * Retrieve rendered item html content
     *
     * @param Varien_Object $item
     * @return string
     */
    public function getItemHtml(Varien_Object $item)
    {
        if ($item->getOrderItem()) {
            $type = $item->getOrderItem()->getProductType();
        } else {
            $type = $item->getProductType();
        }

        return $this->getItemRenderer($type)
            ->setItem($item)
            ->setCanEditQty($this->canEditQty())
            ->toHtml();
    }

    /**
     * Retrieve rendered item extra info html content
     *
     * @param Varien_Object $item
     * @return string
     */
    public function getItemExtraInfoHtml(Varien_Object $item)
    {
        $extraInfoBlock = $this->getChild('order_item_extra_info');
        if ($extraInfoBlock) {
            return $extraInfoBlock
                ->setItem($item)
                ->toHtml();
        }
        return '';
    }

    /**
     * Retrieve rendered column html content
     *
     * @param Varien_Object $item
     * @param string $column the column key
     * @param string $field the custom item field
     * @return string
     */
    public function getColumnHtml(Varien_Object $item, $column, $field = null)
    {
        if ($item->getOrderItem()) {
            $block = $this->getColumnRenderer($column, $item->getOrderItem()->getProductType());
        } else {
            $block = $this->getColumnRenderer($column, $item->getProductType());
        }

        if ($block) {
            $block->setItem($item);
            if (!is_null($field)) {
                $block->setField($field);
            }
            return $block->toHtml();
        }
        return '&nbsp;';
    }

    public function getCreditmemo()
    {
        return Mage::registry('current_creditmemo');
    }

    /**
     * ######################### SALES ##################################
     */

    /**
     * Retrieve available order
     *
     * @return Mage_Sales_Model_Order
     */
    public function getOrder()
    {
        if ($this->hasOrder()) {
            return $this->getData('order');
        }
        if (Mage::registry('current_order')) {
            return Mage::registry('current_order');
        }
        if (Mage::registry('order')) {
            return Mage::registry('order');
        }
        if ($this->getInvoice())
        {
            return $this->getInvoice()->getOrder();
        }
        if ($this->getCreditmemo())
        {
            return $this->getCreditmemo()->getOrder();
        }
        if ($this->getItem()->getOrder())
        {
            return $this->getItem()->getOrder();
        }

        Mage::throwException(Mage::helper('sales')->__('Cannot get order instance'));
    }

    /**
     * Retrieve price data object
     *
     * @return Mage_Sales_Model_Order
     */
    public function getPriceDataObject()
    {
        $obj = $this->getData('price_data_object');
        if (is_null($obj)) {
            return $this->getOrder();
        }
        return $obj;
    }

    /**
     * Retrieve price attribute html content
     *
     * @param string $code
     * @param bool $strong
     * @param string $separator
     * @return string
     */
    public function displayPriceAttribute($code, $strong = false, $separator = '<br />')
    {
        if ($code == 'tax_amount' && $this->getOrder()->getRowTaxDisplayPrecision()) {
            return $this->displayRoundedPrices(
                $this->getPriceDataObject()->getData('base_'.$code),
                $this->getPriceDataObject()->getData($code),
                $this->getOrder()->getRowTaxDisplayPrecision(),
                $strong,
                $separator
            );
        } else {
            return $this->displayPrices(
                $this->getPriceDataObject()->getData('base_'.$code),
                $this->getPriceDataObject()->getData($code),
                $strong,
                $separator
            );
        }
    }

    /**
     * Retrieve price formated html content
     *
     * @param float $basePrice
     * @param float $price
     * @param bool $strong
     * @param string $separator
     * @return string
     */
    public function displayPrices($basePrice, $price, $strong = false, $separator = '<br />')
    {
        return $this->displayRoundedPrices($basePrice, $price, 2, $strong, $separator);
    }

    /**
     * Display base and regular prices with specified rounding precision
     *
     * @param   float $basePrice
     * @param   float $price
     * @param   int $precision
     * @param   bool $strong
     * @param   string $separator
     * @return  string
     */
    public function displayRoundedPrices($basePrice, $price, $precision=2, $strong = false, $separator = '<br />')
    {
        if ($this->getOrder()->isCurrencyDifferent()) {
            $res = '';
            $res.= $this->getOrder()->formatBasePricePrecision($basePrice, $precision);
            $res.= $separator;
            $res.= $this->getOrder()->formatPricePrecision($price, $precision, true);
        }
        else {
            $res = $this->getOrder()->formatPricePrecision($price, $precision);
            if ($strong) {
                $res = '<strong>'.$res.'</strong>';
            }
        }
        return $res;
    }

    /**
     * Retrieve include tax html formated content
     *
     * @param Varien_Object $item
     * @return string
     */
    public function displayPriceInclTax(Varien_Object $item)
    {
        $qty = ($item->getQtyOrdered() ? $item->getQtyOrdered() : ($item->getQty() ? $item->getQty() : 1));
        $baseTax = ($item->getTaxBeforeDiscount() ? $item->getTaxBeforeDiscount() : ($item->getTaxAmount() ? $item->getTaxAmount() : 0));
        $tax = ($item->getBaseTaxBeforeDiscount() ? $item->getBaseTaxBeforeDiscount() : ($item->getBaseTaxAmount() ? $item->getBaseTaxAmount() : 0));

        $basePriceTax = 0;
        $priceTax = 0;

        if (floatval($qty)) {
            $basePriceTax = $item->getBasePrice()+$baseTax/$qty;
            $priceTax = $item->getPrice()+$tax/$qty;
        }

        return $this->displayPrices(
            $this->getOrder()->getStore()->roundPrice($basePriceTax),
            $this->getOrder()->getStore()->roundPrice($priceTax)
        );
    }

    /**
     * Retrieve subtotal price include tax html formated content
     *
     * @param Varien_Object $item
     * @return string
     */
    public function displaySubtotalInclTax($item)
    {
        $baseTax = ($item->getTaxBeforeDiscount() ? $item->getTaxBeforeDiscount() : ($item->getTaxAmount() ? $item->getTaxAmount() : 0));
        $tax = ($item->getBaseTaxBeforeDiscount() ? $item->getBaseTaxBeforeDiscount() : ($item->getBaseTaxAmount() ? $item->getBaseTaxAmount() : 0));

        return $this->displayPrices(
            $item->getBaseRowTotal()+$baseTax,
            $item->getRowTotal()+$tax
        );
    }

    /**
     * Retrieve tax calculation html content
     *
     * @param Varien_Object $item
     * @return string
     */
    public function displayTaxCalculation(Varien_Object $item)
    {
        if ($item->getTaxPercent() && $item->getTaxString() == '') {
            $percents = array($item->getTaxPercent());
        } else if ($item->getTaxString()) {
            $percents = explode(Mage_Tax_Model_Config::CALCULATION_STRING_SEPARATOR, $item->getTaxString());
        } else {
            return '0%';
        }

        foreach ($percents as &$percent) {
            $percent = sprintf('%.2f%%', $percent);
        }
        return implode(' + ', $percents);
    }

    /**
     * Retrieve tax with persent html content
     *
     * @param Varien_Object $item
     * @return string
     */
    public function displayTaxPercent(Varien_Object $item)
    {
        if ($item->getTaxPercent()) {
            return sprintf('%s%%', $item->getTaxPercent() + 0);
        } else {
            return '0%';
        }
    }

    /**
     *  INVOICES
     */

    /**
     * Check shipment availability for current invoice
     *
     * @return bool
     */
    public function canCreateShipment()
    {
        foreach ($this->getInvoice()->getAllItems() as $item) {
            if ($item->getOrderItem()->getQtyToShip()) {
                return true;
            }
        }
        return false;
    }

    /**
     * Setter for flag _canEditQty
     *
     * @return Mage_Adminhtml_Block_Sales_Items_Abstract
     * @see self::_canEditQty
     * @see self::canEditQty
     */
    public function setCanEditQty($value) {
        $this->_canEditQty = $value;
        return $this;
    }

    /**
     * Check availability to edit quantity of item
     *
     * @return boolean
     */
    public function canEditQty()
    {
        /**
         * If parent block has set
         */
        if (!is_null($this->_canEditQty)) {
            return $this->_canEditQty;
        }

        /**
         * Disable editing of quantity of item if creating of shipment forced
         * and ship partially disabled for order
         */
        if ($this->getOrder()->getForcedDoShipmentWithInvoice()
            && ($this->canShipPartially($this->getOrder()) || $this->canShipPartiallyItem($this->getOrder()))
        ) {
            return false;
        }
        if ($this->getOrder()->getPayment()->canCapture()) {
            return $this->getOrder()->getPayment()->canCapturePartial();
        }
        return true;
    }

    public function canCapture()
    {
        if (Mage::getSingleton('admin/session')->isAllowed('sales/order/actions/capture')) {
            return $this->getInvoice()->canCapture();
        }
        return false;
    }

    public function formatPrice($price)
    {
        return $this->getOrder()->formatPrice($price);
    }

    /**
     * Retrieve source
     *
     * @return Mage_Sales_Model_Order_Invoice
     */
    public function getSource()
    {
        return $this->getInvoice();
    }

    /**
     * Retrieve invoice model instance
     *
     * @return Mage_Sales_Model_Invoice
     */
    public function getInvoice()
    {
        return Mage::registry('current_invoice');
    }

    /**
     * CREDITMEMO
     */

    public function canReturnToStock() {
        $canReturnToStock = Mage::getStoreConfig(Mage_CatalogInventory_Model_Stock_Item::XML_PATH_CAN_SUBTRACT);
        if (Mage::getStoreConfig(Mage_CatalogInventory_Model_Stock_Item::XML_PATH_CAN_SUBTRACT)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * Whether to show 'Return to stock' checkbox for item
     * @param Mage_Sales_Model_Order_Creditmemo_Item $item
     * @return bool
     */
    public function canReturnItemToStock($item=null) {
        $canReturnToStock = Mage::getStoreConfig(Mage_CatalogInventory_Model_Stock_Item::XML_PATH_CAN_SUBTRACT);
        if (!is_null($item)) {
            if (!$item->hasCanReturnToStock()) {
                $product = Mage::getModel('catalog/product')->load($item->getOrderItem()->getProductId());
                if ( $product->getId() && $product->getStockItem()->getManageStock() ) {
                    $item->setCanReturnToStock(true);
                }
                else {
                    $item->setCanReturnToStock(false);
                }
            }
            $canReturnToStock = $item->getCanReturnToStock();
        }
        return $canReturnToStock;
    }
    /**
     * Whether to show 'Return to stock' column for item parent
     * @param Mage_Sales_Model_Order_Creditmemo_Item $item
     * @return bool
     */
    public function canParentReturnToStock($item = null)
    {
        $canReturnToStock = Mage::getStoreConfig(Mage_CatalogInventory_Model_Stock_Item::XML_PATH_CAN_SUBTRACT);
        if (!is_null($item)) {
            if ( $item->getCreditmemo()->getOrder()->hasCanReturnToStock() ) {
                $canReturnToStock = $item->getCreditmemo()->getOrder()->getCanReturnToStock();
            }
        } elseif ( $this->getOrder()->hasCanReturnToStock() ) {
            $canReturnToStock = $this->getOrder()->getCanReturnToStock();
        }
        return $canReturnToStock;
    }

    /**
     * Return true if can ship partially
     *
     * @param Mage_Sales_Model_Order|null $order
     * @return boolean
     */
    public function canShipPartially($order = null)
    {
        if (is_null($order) || !$order instanceof Mage_Sales_Model_Order) {
            $order = Mage::registry('current_shipment')->getOrder();
        }
        $value = $order->getCanShipPartially();
        if (!is_null($value) && !$value) {
            return false;
        }
        return true;
    }

    /**
     * Return true if can ship items partially
     *
     * @param Mage_Sales_Model_Order|null $order
     * @return boolean
     */
    public function canShipPartiallyItem($order = null)
    {
        if (is_null($order) || !$order instanceof Mage_Sales_Model_Order) {
            $order = Mage::registry('current_shipment')->getOrder();
        }
        $value = $order->getCanShipPartiallyItem();
        if (!is_null($value) && !$value) {
            return false;
        }
        return true;
    }

    public function isShipmentRegular()
    {
        if (!$this->canShipPartiallyItem() || !$this->canShipPartially()) {
            return false;
        }
        return true;
    }

}