<?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) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Product form price field helper
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Catalog_Product_Helper_Form_Price extends Varien_Data_Form_Element_Text
{

    public function __construct($attributes=array())
    {
        parent::__construct($attributes);
        $this->addClass('validate-zero-or-greater');
    }

    public function getAfterElementHtml()
    {
        $html = parent::getAfterElementHtml();
        /**
         * getEntityAttribute - use __call
         */
        $addJsObserver = false;
        if ($attribute = $this->getEntityAttribute()) {
            if (!($storeId = $attribute->getStoreId())) {
                $storeId = $this->getForm()->getDataObject()->getStoreId();
            }
            $store = Mage::app()->getStore($storeId);
            $html.= '<strong>['.(string)$store->getBaseCurrencyCode().']</strong>';
            if (Mage::helper('tax')->priceIncludesTax($store)) {
                if ($attribute->getAttributeCode()!=='cost') {
                    $addJsObserver = true;
                    $html.= ' <strong>['.Mage::helper('tax')->__('Inc. Tax').'<span id="dynamic-tax-'.$attribute->getAttributeCode().'"></span>]</strong>';
                }
            }
        }
        if ($addJsObserver) {
            $html .= $this->_getTaxObservingCode($attribute);
        }

        return $html;
    }

    protected function _getTaxObservingCode($attribute)
    {
        $spanId = "dynamic-tax-{$attribute->getAttributeCode()}";

        $html = "<script type='text/javascript'>if (dynamicTaxes == undefined) var dynamicTaxes = new Array(); dynamicTaxes[dynamicTaxes.length]='{$attribute->getAttributeCode()}'</script>";
        return $html;
    }

    public function getEscapedValue($index=null)
    {
        $value = $this->getValue();

        if (!is_numeric($value)) {
            return null;
        }

        return number_format($value, 2, null, '');
    }

}