<?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
*/

function migrate_orders()
{
	$array_errors = array();
	$res = true;
	if (!defined('PS_TAX_EXC'))
		 define('PS_TAX_EXC', 1);

	if (!defined('PS_TAX_INC'))
		 define('PS_TAX_INC', 0);

	$col_order_detail_old = Db::getInstance()->executeS('SHOW FIELDS FROM `'._DB_PREFIX_.'order_detail`');
	foreach ($col_order_detail_old as $k => $field)
		if ($field['Field'] != 'id_order_invoice')
			$col_order_detail[$k] = $field['Field'];

	if (!$col_order_detail_old)
		return array('error' => 1, 'msg' => 'unable to get fields list from order_detail table');

	$insert_order_detail = 'INSERT INTO `'._DB_PREFIX_.'order_detail_2` (`'.implode('`, `', $col_order_detail).'`) VALUES ';

	$col_orders = array();
	$col_orders_old = Db::getInstance()->executeS('SHOW FIELDS FROM `'._DB_PREFIX_.'orders`');

	if (!$col_orders_old)
		return array('error' => 1, 'msg' => 'unable to get fields list from orders table');

	foreach ($col_orders_old as $k => $field)
		$col_orders[$k] = $field['Field'];

	$insert_order = 'INSERT INTO `'._DB_PREFIX_.'orders_2` (`'.implode('`, `', $col_orders).'`) VALUES ';

	// create temporary tables
	$res = mo_duplicateTables();
	if (!$res)
		$array_errors[] = 'unable to duplicate tables orders and order_detail';

	// this was done like that previously
	$wrapping_tax_rate = 1 + ((float)Db::getInstance()->getValue('SELECT value
		FROM `'._DB_PREFIX_.'configuration`
		WHERE name = "PS_GIFT_WRAPPING_TAX"') / 100);

	$step = 3000;
	$count_orders = Db::getInstance()->getValue('SELECT count(id_order) FROM '._DB_PREFIX_.'orders');
	$nb_loop = $start = 0;
	if($count_orders > 0)
		$nb_loop = ceil($count_orders / $step);
	for($i = 0; $i < $nb_loop; $i++)
	{
		$order_res = Db::getInstance()->query('SELECT * FROM `'._DB_PREFIX_.'orders` LIMIT '.(int)$start.', '.(int)$step);
		$start = intval(($i+1) * $step);
		$cpt = 0;
		$flush_limit = 200;
		while ($order = Db::getInstance()->nextRow($order_res))
		{
			$sum_total_products = 0;
			$sum_tax_amount = 0;
			$default_group_id = mo_getCustomerDefaultGroup((int)$order['id_customer']);
			$price_display_method = mo_getPriceDisplayMethod((int)$default_group_id);
			$order_details_list = Db::getInstance()->query('
			SELECT od.*
			FROM `'._DB_PREFIX_.'order_detail` od
			WHERE od.`id_order` = '.(int)$order['id_order']);
			while ($order_details = Db::getInstance()->nextRow($order_details_list))
			{
				$values_order_detail = array();
				$values_order = array();
				$col_order_detail = array();
				// we don't want to erase order_details data in order to create the insert query
				$products = mo_setProductPrices($order_details, $price_display_method);
				$tax_rate = 1 + ((float)$products['tax_rate'] / 100);
				$reduction_amount_tax_incl = (float)$products['reduction_amount'];
	
				// cart::getTaxesAverageUsed equivalent
				$sum_total_products += $products['total_price'];
				
				$sum_tax_amount += $products['total_wt'] - $products['total_price'];
	
				$order_details['reduction_amount_tax_incl'] = $reduction_amount_tax_incl;
				$order_details['reduction_amount_tax_excl'] = (float)mo_ps_round($reduction_amount_tax_incl / $tax_rate);
				$order_details['total_price_tax_incl'] = (float)$products['total_wt'];
				$order_details['total_price_tax_excl'] = (float)$products['total_price'];
				$order_details['unit_price_tax_incl'] = (float)$products['product_price_wt'];
				$order_details['unit_price_tax_excl'] = (float)$products['product_price'];
				foreach (array_keys($order_details) as $k)
					if (!in_array($k, $col_order_detail))
						unset($order_details[$k]);
					else
					{
						if (in_array($order_details[$k], array('product_price', 'reduction_percent', 'reduction_amount', 'group_reduction', 'product_quantity_discount', 'tax_rate', 'ecotax', 'ecotax_tax_rate')))
							$order_details[$k] = (float)$order_details[$k];
						else
							$order_details[$k] = Db::getInstance()->escape($order_details[$k]);
					}
				if (count($order_details))
					$values_order_detail[] = '(\''.implode('\', \'', $order_details).'\')';
				unset($order_details);
			}
	
			$average_tax_used = 1;
			if ($sum_total_products > 0)
				$average_tax_used +=  $sum_tax_amount / $sum_total_products;
			$average_tax_used = round($average_tax_used, 4);
			$carrier_tax_rate = 1;
			if (isset($order['carrier_tax_rate']))
				$carrier_tax_rate + ((float)$order['carrier_tax_rate'] / 100);
	
			$total_discount_tax_excl = $order['total_discounts'] / $average_tax_used;
			$order['total_discounts_tax_incl'] = (float)$order['total_discounts'];
			$order['total_discounts_tax_excl'] = (float)$total_discount_tax_excl;
	
			$order['total_shipping_tax_incl'] = (float)$order['total_shipping'];
			$order['total_shipping_tax_excl'] = (float)($order['total_shipping'] / $carrier_tax_rate);
			$shipping_taxes = $order['total_shipping_tax_incl'] - $order['total_shipping_tax_excl'];
	
			$order['total_wrapping_tax_incl'] = (float)$order['total_wrapping'];
			$order['total_wrapping_tax_excl'] = ((float)$order['total_wrapping'] / $wrapping_tax_rate);
			$wrapping_taxes = $order['total_wrapping_tax_incl'] - $order['total_wrapping_tax_excl'];
	
			$product_taxes = $order['total_products_wt'] - $order['total_products'];
			$order['total_paid_tax_incl'] = (float)$order['total_paid'];
			$order['total_paid_tax_excl'] = (float)$order['total_paid'] - $shipping_taxes - $wrapping_taxes - $product_taxes;
			// protect text and varchar fields
			$order['gift_message'] = Db::getInstance()->escape($order['gift_message']);
			$order['payment'] = Db::getInstance()->escape($order['payment']);
			$order['module'] = Db::getInstance()->escape($order['module']);
	
			$values_order[] = '(\''.implode('\', \'', $order).'\')';
	
			unset($order);
			$cpt++;
			
			// limit to $cpt 
			if ($cpt >= $flush_limit)
			{
				$cpt = 0;
				if (isset($values_order_detail) && count($values_order_detail) && !Db::getInstance()->execute($insert_order_detail. implode(',', $values_order_detail)))
				{
					$res = false;
					$array_errors[] = '[insert order detail 1] - '.Db::getInstance()->getMsgError();
				}
				if (isset($values_order) && count($values_order) && !Db::getInstance()->execute($insert_order. implode(',', $values_order)))
				{
					$res = false;
					$array_errors[] = '[insert order 2] - '.Db::getInstance()->getMsgError();
				}
				if (isset($values_order))
					unset($values_order);
				if (isset($values_order_detail))
					unset($values_order_detail);
			}
		}
	}

	if (isset($values_order_detail) && count($values_order_detail) && !Db::getInstance()->execute($insert_order_detail. implode(',', $values_order_detail)))
	{
		$res = false;
		$array_errors[] = '[insert order detail 3] - '.Db::getInstance()->getMsgError();
	}
	if (isset($values_order) && count($values_order) && !Db::getInstance()->execute($insert_order. implode(',', $values_order)))
	{
		$res = false;
		$array_errors[] = '[insert order 4] - '.Db::getInstance()->getMsgError();
	}
	if (!mo_renameTables())
	{
		$res = false;
		$array_errors[] = 'unable to rename tables orders_2 and order_detail_2 to orders and order_detail';
	}

	if (!$res)
		return array('error' => 1, 'msg' => count($array_errors).' error(s) : <br/>'.implode('<br/>', $array_errors));
}

/**
 * mo_ps_round is a simplification of Tools::ps_round:
 * - round is always 2
 * - no call to Configuration class
 *
 * @param mixed $val
 * @return void
 */
function mo_ps_round($val)
{
	static $ps_price_round_mode;
	if (empty($ps_price_round_mode))
	{
		$ps_price_round_mode = Db::getInstance()->getValue('SELECT value
			FROM `'._DB_PREFIX_.'configuration`
			WHERE name = "PS_PRICE_ROUND_MODE"');
	}

	switch ($ps_price_round_mode)
	{
		case 0:
			return ceil($val * 100)/100;
		case 1:
			return floor($val * 100)/100;
		default:
			return round($val, 2);
	}
}

function mo_duplicateTables()
{
	$res = true;
	$res &= Db::getInstance()->execute('CREATE TABLE
		`'._DB_PREFIX_.'orders_2` LIKE `'._DB_PREFIX_.'orders`');
	$res &= Db::getInstance()->execute('CREATE TABLE
		`'._DB_PREFIX_.'order_detail_2` LIKE `'._DB_PREFIX_.'order_detail`');
	return $res;
}

function mo_renameTables()
{
	$res = true;
	$res &= Db::getInstance()->execute('DROP TABLE `'._DB_PREFIX_.'orders`');
	$res &= Db::getInstance()->execute('DROP TABLE `'._DB_PREFIX_.'order_detail`');

	$res &= Db::getInstance()->execute('RENAME TABLE `'._DB_PREFIX_.'orders_2` TO `'._DB_PREFIX_.'orders`');
	$res &= Db::getInstance()->execute('RENAME TABLE `'._DB_PREFIX_.'order_detail_2` TO `'._DB_PREFIX_.'order_detail`');
	return $res;
}

function mo_getCustomerDefaultGroup($id_customer)
{
	static $cache;
	if (!isset($cache[$id_customer]))
		$cache[$id_customer] = Db::getInstance()->getValue('SELECT `id_default_group` FROM `'._DB_PREFIX_.'customer` WHERE `id_customer` = '.(int)$id_customer);

	return $cache[$id_customer];
}

function mo_getPriceDisplayMethod($id_group)
{
	static $cache;

	if (!isset($cache[$id_group]))
    $cache[$id_group] = Db::getInstance()->getValue('
			SELECT `price_display_method`
			FROM `'._DB_PREFIX_.'group`
			WHERE `id_group` = '.(int)$id_group);

	return $cache[$id_group];
}

function mo_setProductPrices($row, $tax_calculation_method)
{
    if ($tax_calculation_method == PS_TAX_EXC)
        $row['product_price'] = mo_ps_round($row['product_price']);
    else
        $row['product_price_wt'] = mo_ps_round($row['product_price'] * (1 + $row['tax_rate'] / 100));

    $group_reduction = 1;
    if ($row['group_reduction'] > 0)
        $group_reduction =  1 - $row['group_reduction'] / 100;

    if ($row['reduction_percent'] != 0)
    {
        if ($tax_calculation_method == PS_TAX_EXC)
            $row['product_price'] = ($row['product_price'] - $row['product_price'] * ($row['reduction_percent'] * 0.01));
        else
        {
            $reduction = mo_ps_round($row['product_price_wt'] * ($row['reduction_percent'] * 0.01));
            $row['product_price_wt'] = mo_ps_round(($row['product_price_wt'] - $reduction));
        }
    }

    if ($row['reduction_amount'] != 0)
    {
        if ($tax_calculation_method == PS_TAX_EXC)
            $row['product_price'] = ($row['product_price'] - ($row['reduction_amount'] / (1 + $row['tax_rate'] / 100)));
        else
            $row['product_price_wt'] = mo_ps_round(($row['product_price_wt'] - $row['reduction_amount']));
    }

    if ($row['group_reduction'] > 0)
    {
        if ($tax_calculation_method == PS_TAX_EXC)
            $row['product_price'] = $row['product_price'] * $group_reduction;
        else
            $row['product_price_wt'] = mo_ps_round($row['product_price_wt'] * $group_reduction);
    }

    if (($row['reduction_percent'] OR $row['reduction_amount'] OR $row['group_reduction']) AND $tax_calculation_method == PS_TAX_EXC)
        $row['product_price'] = mo_ps_round($row['product_price']);

    if ($tax_calculation_method == PS_TAX_EXC)
        $row['product_price_wt'] = mo_ps_round($row['product_price'] * (1 + ($row['tax_rate'] * 0.01))) + mo_ps_round($row['ecotax'] * (1 + $row['ecotax_tax_rate'] / 100));
    else
    {
        $row['product_price_wt_but_ecotax'] = $row['product_price_wt'];
        $row['product_price_wt'] = mo_ps_round($row['product_price_wt'] + $row['ecotax'] * (1 + $row['ecotax_tax_rate'] / 100));
    }

	 if ($tax_calculation_method != PS_TAX_EXC)
	 	$row['product_price'] = $row['product_price_wt'] / (1 + $row['tax_rate'] / 100);

    $row['total_wt'] = $row['product_quantity'] * $row['product_price_wt'];
    $row['total_price'] = $row['product_quantity'] * $row['product_price'];

    return $row;
}