<?php
/*------------------------------------------------------------------------------
  $Id$

  AbanteCart, Ideal OpenSource Ecommerce Solution
  http://www.AbanteCart.com

  Copyright © 2011-2017 Belavier Commerce LLC

  This source file is subject to Open Software License (OSL 3.0)
  License details is bundled with this package in the file LICENSE.txt.
  It is also available at this URL:
  <http://www.opensource.org/licenses/OSL-3.0>

 UPGRADE NOTE:
   Do not edit or add to this file if you wish to upgrade AbanteCart to newer
   versions in the future. If you wish to customize AbanteCart for your
   needs please refer to http://www.AbanteCart.com for more information.
------------------------------------------------------------------------------*/
if (!defined('DIR_CORE')){
	header('Location: static_pages/');
}

final class AConfig{
	public $data;
	private $cnfg = array ();
	/**
	 * @var Registry
	 */
	private $registry;
	public $groups = array ('details', 'general', 'checkout', 'appearance', 'mail', 'im', 'api', 'system');

	public function __construct($registry){
		$this->registry = $registry;
		$this->_load_settings();
	}

	/**
	 * get data from config
	 *
	 * @param $key - data key
	 * @return mixed - requested data; null if no data wit such key
	 */
	public function get($key){
		return (isset($this->cnfg[$key]) ? $this->cnfg[$key] : null);
	}

	/**
	 * add data to config.
	 *
	 * @param $key - access key
	 * @param $value - data to store in config
	 * @return void
	 */
	public function set($key, $value){
		$this->cnfg[$key] = $value;
	}

	/**
	 * check if data exist in config
	 *
	 * @param $key
	 * @return bool
	 */
	public function has($key){
		return isset($this->cnfg[$key]);
	}

	/**
	 * load data from config and merge with current data set
	 *
	 * @throws AException
	 * @param $filename
	 * @return void
	 */
	public function load($filename){
		$file = DIR_CONFIG . $filename . '.php';

		if (file_exists($file)){
			$cfg = array ();

			/** @noinspection PhpIncludeInspection */
			require($file);

			$this->data = array_merge($this->data, $cfg);
		} else{
			throw new AException(AC_ERR_LOAD, 'Error: Could not load config ' . $filename . '!');
		}
	}

	private function _load_settings(){
		/**
		 * @var ACache $cache
		 */
		$cache = $this->registry->get('cache');
		/**
		 * @var ADB
		 */
		$db = $this->registry->get('db');

		//detect URL for the store
		$url = str_replace('www.', '', $_SERVER['HTTP_HOST']) . get_url_path($_SERVER['PHP_SELF']);
		if (defined('INSTALL')){
			$url = str_replace('install/', '', $url);
		}

		//enable cache storage based on configuration
		$cache->enableCache();
		//set configured driver.
		$cache_driver = 'file';
		if (defined('CACHE_DRIVER')){
			$cache_driver = CACHE_DRIVER;
		}
		if (!$cache->setCacheStorageDriver($cache_driver)){
			$error = new AError ('Cache storage driver ' . $cache_driver . ' can not be loaded!');
			$error->toMessages()->toLog()->toDebug();
		}

		// Load default store settings
		$settings = $cache->pull('settings');
		if (empty($settings)){
			// set global settings (without extensions settings)
			$sql = "SELECT se.*
					FROM " . $db->table("settings") . " se
					WHERE se.store_id = '0'
						AND se.`group` NOT IN (SELECT `key` FROM " . $db->table("extensions") . ")";
			$query = $db->query($sql);
			$settings = $query->rows;
			foreach ($settings as &$setting){
				if ($setting['key'] == 'config_url'){
					$parsed_url = parse_url($setting['value']);
					if (empty($parsed_url['scheme'])){
						$parsed_url['scheme'] = "http";
					}
					$setting['value'] = $parsed_url['scheme'] . '://' . $parsed_url['host'] . $parsed_url['path'];
				}
				if ($setting['key'] == 'config_ssl_url' && $setting['value']){
					$parsed_url = parse_url($setting['value']);
					if (empty($parsed_url['scheme'])){
						$parsed_url['scheme'] = "https";
					}
					$setting['value'] = $parsed_url['scheme'] . '://' . $parsed_url['host'] . $parsed_url['path'];
				}
				$this->cnfg[$setting['key']] = $setting['value'];
			}
			unset($setting); //unset temp reference

			//fix for rare issue on a database and creation of empty cache
			if (!empty($settings) && $this->cnfg['config_cache_enable']){
				$cache->push('settings', $settings);
			}

		} else{
			foreach ($settings as $setting){
				$this->cnfg[$setting['key']] = $setting['value'];
			}
		}
		//set current store id as default 0 for now. It will be reset if other store detected below
		$this->cnfg['config_store_id'] = 0;

		// if storefront and not default store try to load setting for given URL
		/* Example: 
			Specific store config -> http://localhost/abantecart123 
			Generic config -> http://localhost
		*/
		$config_url = preg_replace("(^https?://)", "", $this->cnfg['config_url']);
		$config_url = preg_replace("(^://)", "", $config_url);
		if (
				!(is_int(strpos($config_url, $url))) &&
				!(is_int(strpos($url, $config_url)))
		){
			// if requested url not a default store URL - do check other stores.
			$cache_key = 'settings.store.' . md5('http://' . $url);
			$store_settings = $cache->pull($cache_key);

			if (empty($store_settings)){
				$sql = "SELECT se.`key`, se.`value`, st.store_id
		   			  FROM " . $db->table('settings') . " se
		   			  RIGHT JOIN " . $db->table('stores') . " st ON se.store_id = st.store_id
		   			  WHERE se.store_id = (SELECT DISTINCT store_id FROM " . $db->table('settings') . "
		   			                       WHERE `group`='details'
		   			                       AND
		   			                       ( (`key` = 'config_url' AND (`value` LIKE '%" . $db->escape($url) . "'))
		   			                       XOR
		   			                       (`key` = 'config_ssl_url' AND (`value` LIKE '%" . $db->escape($url) . "')) )
		                                   LIMIT 0,1)
		   					AND st.status = 1
		   					AND TRIM(se.`group`) NOT IN
	                                                (SELECT TRIM(`key`) as `key`
	                                                FROM " . $db->table("extensions") . ")";
				$query = $db->query($sql);
				$store_settings = $query->rows;
			}

			if ($store_settings){
				//store found by URL, load settings
				foreach ($store_settings as $row){
					$value = $row['value'];
					$this->cnfg[$row['key']] = $value;
				}

				//fix for rare issue on a database and creation of empty cache
				if ($this->cnfg['config_cache_enable']){
					$cache->push($cache_key, $store_settings);
				}

				$this->cnfg['config_store_id'] = $store_settings[0]['store_id'];
				$this->cnfg['current_store_id'] = $this->cnfg['config_store_id'];
			} else{
				$warning = new AWarning('Warning: Accessing store with non-configured or unknown domain ( ' . $url . ' ).' . "\n" . ' Check setting of your store domain URL in System Settings . Loading default store configuration for now.');
				$warning->toLog()->toMessages();
				//set config url to current domain
				$this->cnfg['config_url'] = 'http://' . REAL_HOST . get_url_path($_SERVER['PHP_SELF']);
			}

			if (!$this->cnfg['config_url']){
				$this->cnfg['config_url'] = 'http://' . REAL_HOST . get_url_path($_SERVER['PHP_SELF']);
			}
		}

		//load specific store if admin and set current_store_id for admin operation on store
		if (IS_ADMIN){
			//Check if admin has specific store in session or selected
			$session = $this->registry->get('session');
			$store_id = $this->registry->get('request')->get['store_id'];
			if (has_value($store_id)){
				$this->cnfg['current_store_id'] = (int)$store_id;
			} else if (has_value($session->data['current_store_id'])){
				$this->cnfg['current_store_id'] = $session->data['current_store_id'];
			} elseif (isset($session->data['config_store_id'])){
				//nothing to do 
				$this->cnfg['current_store_id'] = $session->data['config_store_id'];
			}
			//reload store settings if not what is loaded now
			if ($this->cnfg['current_store_id'] != $this->cnfg['config_store_id']){
				$this->_reload_settings($this->cnfg['current_store_id']);
				$this->cnfg['config_store_id'] = $this->cnfg['current_store_id'];
			}
		}

		//get template for storefront
		$tmpl_id = $this->cnfg['config_storefront_template'];

		//disable cache when it disabled in settings
		if (!$this->cnfg['config_cache_enable']){
			$cache->disableCache();
		}

		// load extension settings
		$cache_suffix = IS_ADMIN ? 'admin' : $this->cnfg['config_store_id'];
		$settings = $cache->pull('settings.extension.' . $cache_suffix);
		if (empty($settings)){
			// all extensions settings of store
			$sql = "SELECT se.*, e.type as extension_type, e.key as extension_txt_id
					FROM " . $db->table('settings') . " se
					LEFT JOIN " . $db->table('extensions') . " e ON se.`group` = e.`key`
					WHERE se.store_id='" . (int)$this->cnfg['config_store_id'] . "' AND e.extension_id IS NOT NULL
					ORDER BY se.store_id ASC, se.group ASC";

			$query = $db->query($sql);
			foreach ($query->rows as $row){
				//skip settings for non-active template except status (needed for extensions list in admin)
				if ($row['extension_type'] == 'template' && $tmpl_id != $row['group'] && $row['key'] != $row['extension_txt_id'] . '_status'){
					continue;
				}
				$settings[] = $row;
			}
			//fix for rare issue on a database and creation of empty cache
			if (!empty($settings)){
				$cache->push('settings.extension.' . $cache_suffix, $settings);
			}
		}

		//add encryption key to settings, otherwise use from database (backwards compatibility)
		if (defined('ENCRYPTION_KEY')){
			$setting['encryption_key'] = ENCRYPTION_KEY;
		}

		foreach ($settings as $setting){
			$this->cnfg[$setting['key']] = $setting['value'];
		}

	}

	private function _reload_settings($store_id = 0){
		//we don't use cache here cause domain may be different and we cannot change cache from control panel
		$db = $this->registry->get('db');
		$sql = "SELECT se.`key`, se.`value`, st.store_id
					FROM " . $db->table('settings') . " se
					RIGHT JOIN " . $db->table('stores') . " st ON se.store_id = st.store_id
					WHERE se.store_id = " . (int)$store_id . " AND st.status = 1
					AND se.`group` NOT IN (SELECT `key` FROM " . $db->table("extensions") . ");";
		$query = $db->query($sql);
		$store_settings = $query->rows;
		foreach ($store_settings as $row){
			if ($row['key'] != 'config_url'){
				$this->cnfg[$row['key']] = $row['value'];
			}
		}
	}
}