<?php

namespace WPGMZA;

if(!defined('ABSPATH'))
	return;

class GlobalSettings extends Settings
{
	const TABLE_NAME = 'wpgmza_global_settings';
	const LEGACY_TABLE_NAME = 'WPGMZA_OTHER_SETTINGS';
	
	private $updatingLegacySettings = false;
	
	public function __construct()
	{
		// TODO: Update XML locations here
		
		$self = $this;
		
		$legacy_settings_exist = (get_option(GlobalSettings::LEGACY_TABLE_NAME) ? true : false);
		$settings_exist = (get_option(GlobalSettings::TABLE_NAME) ? true : false);
		
		if($legacy_settings_exist && !$settings_exist)
			$this->migrate();
		
		Settings::__construct(GlobalSettings::TABLE_NAME);
		
		if(!empty(get_option('wpgmza_google_maps_api_key')))
		{
			$this->wpgmza_google_maps_api_key = get_option('wpgmza_google_maps_api_key');
		}
		
		if(!$legacy_settings_exist && !$settings_exist)
			$this->install();
		
		// Defaults for directories
		if (empty(get_option("wpgmza_xml_location")))
		{
			$upload_dir = wp_upload_dir();
			add_option("wpgmza_xml_location",'{uploads_dir}/wp-google-maps/');
		}
		
		if(empty(get_option("wpgmza_xml_url")))
		{
			$upload_dir = wp_upload_dir();
			add_option("wpgmza_xml_url",'{uploads_url}/wp-google-maps/');
		}
		
		$this->wpgmza_marker_xml_location	= $this->getXMLCacheDirPath();
		$this->wpgmza_marker_xml_url		= $this->getXMLCacheDirURL();
		
		// Legacy Pro support. Users with older Pro will lose settings 
		add_filter('pre_update_option_WPGMZA_OTHER_SETTINGS', array($this, 'onPreUpdateLegacySettings'), 10, 2);
	}
	
	public function __set($name, $value)
	{
		switch($name)
		{
			case "wpgmza_google_maps_api_key":
				// NB: Legacy support
				update_option('wpgmza_google_maps_api_key', $value, false);
				break;
				
			case "wpgmza_marker_xml_location":
				
				// NB: Dreadful hack, it seems you can either have slashes constantly doubling up, or no slashes. Suspect fighting with legacy code, no time to fix this now. This should at least stop slashes accumulating on Windows machines.
				$value = preg_replace("#\\{2,}#", "\\", $value);
				update_option('wpgmza_xml_location', $value, false);
				
				break;
			
			case "wpgmza_marker_xml_url":
				update_option('wpgmza_xml_url', $value, false);
				break;
				
			case "wpgmza_maps_engine":
				// NB: Support difference in names
				Settings::__set("engine", $value);
				break;
		}
		
		Settings::__set($name, $value);
	}
	
	public function __get($name)
	{
		if($name == 'useLegacyHTML')
			return true;
		
		return Settings::__get($name);
	}
	
	// TODO: This should inherit from Factory when traits are available
	public static function createInstance()
	{
		$class = get_called_class();
		$args = func_get_args();
		$count = count($args);
		$filter = "wpgmza_create_$class";
		
		if(empty($args))
			$filter_args = array($filter, null);
		else
			$filter_args = array_merge(array($filter), $args);
		
		/* Developer Hook (Filter) - Call global class overrie, which can be used to replace the PHP class, similarly to inheritence. We recommend using Factory for most classes */
		$override = call_user_func_array('apply_filters', $filter_args);
		
		if($override)
			return $override;
		
		$reflect = new \ReflectionClass($class);
		$instance = $reflect->newInstanceArgs($args);
		
		return $instance;
	}
	
	public function getDefaults()
	{
		/* Developer Hook (Filter) - Add or alter default plugin installation settings */
		$settings = apply_filters('wpgmza_plugin_get_default_settings', array(
			'engine' 					=> 'google-maps',
			'internal_engine'			=> InternalEngine::getDefaultEngine(),
			'google_maps_api_key'		=> get_option('wpgmza_google_maps_api_key'),
			'default_marker_icon'		=> Marker::DEFAULT_ICON,
			'developer_mode'			=> false,
			'user_interface_style'		=> "default",
			'image_placeholder_enabled'	=> true,
		));

		return $settings;
	}
	
	private function getXMLCacheDirPath()
	{
		$file = get_option("wpgmza_xml_location");
		$content_dir = WP_CONTENT_DIR;
		$content_dir = trim($content_dir, '/');
		if (defined('WP_PLUGIN_DIR')) {
			$plugin_dir = str_replace(wpgmza_get_document_root(), '', WP_PLUGIN_DIR);
			$plugin_dir = trim($plugin_dir, '/');
		} else {
			$plugin_dir = str_replace(wpgmza_get_document_root(), '', WP_CONTENT_DIR . '/plugins');
			$plugin_dir = trim($plugin_dir, '/');
		}
		$upload_dir = wp_upload_dir();
		$upload_dir = $upload_dir['basedir'];
		$upload_dir = rtrim($upload_dir, '/');
		
		$file = str_replace('{wp_content_dir}', $content_dir, $file);
		$file = str_replace('{plugins_dir}', $plugin_dir, $file);
		$file = str_replace('{uploads_dir}', $upload_dir, $file);
		$file = trim($file);
		

		/* Moving away from realpath implementation, it's unreliable in some environments and thats a deal breaker for us */
		$file = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $file);
		
		$pathParts = explode(DIRECTORY_SEPARATOR, $file);
		$invalidParts = array('.', '..', '~');
		foreach($pathParts as $key => $part){
			$part = trim($part);
			if(in_array($part, $invalidParts)){
				unset($pathParts[$key]);
			}
		}

		/* Rejoin the path, but we will have dropped traversal method */
		if(!empty($pathParts)){
			$file = implode(DIRECTORY_SEPARATOR, $pathParts);
		} else {
			$file = false;
		}
		
		/* Now confirm that path contains either: content, uploads, or plugin directory for storage */
		if(!empty($file)){
			$validRoots = array($content_dir, $upload_dir, $plugin_dir);
			$vRoot = false;
			foreach($validRoots as $root){
				$root = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $root);
				$sample = substr($file, 0, strlen($root));

				if($root === $sample){
					$vRoot = true;
				}
			}
			
			if(empty($vRoot)){
				$file = false;
			}
		}
		
		if (empty($file)) {
			$file = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $upload_dir) . DIRECTORY_SEPARATOR . "wp-google-maps" . DIRECTORY_SEPARATOR;
		}

		if (substr($file, -1) != DIRECTORY_SEPARATOR) { $file = $file . DIRECTORY_SEPARATOR; }

		return $file;
	}
	
	private function getXMLCacheDirURL()
	{
		$url = get_option("wpgmza_xml_url");
		
		$content_url = content_url();
		$content_url = trim($content_url, '/');
		 
		$plugins_url = plugins_url();
		$plugins_url = trim($plugins_url, '/');
		 
		$upload_url = wp_upload_dir();
		$upload_url = $upload_url['baseurl'];
		$upload_url = trim($upload_url, '/');

		$url = str_replace('{wp_content_url}', $content_url, $url);
		$url = str_replace('{plugins_url}', $plugins_url, $url);
		$url = str_replace('{uploads_url}', $upload_url, $url);
		
		$url = str_replace('{wp_content_dir}', $content_url, $url);
		$url = str_replace('{plugins_dir}', $plugins_url, $url);
		$url = str_replace('{uploads_dir}', $upload_url, $url);

		if (empty($url))
			$url = $upload_url."/wp-google-maps/";
		
		if (substr($url, -1) != "/") { $url = $url."/"; }

		return $url;
	}
	
	public function onPreUpdateLegacySettings($new_value, $old_value)
	{
		// Merge legacy settings into this settings
		if(!$this->updatingLegacySettings)
			$this->set($new_value);
		
		return $new_value;
	}
	
	protected function update()
	{
		Settings::update();
		
		// Legacy Pro support
		$this->updatingLegacySettings = true;
		
		$legacy = $this->toArray();
		
		update_option(GlobalSettings::LEGACY_TABLE_NAME, $legacy, false);
		
		$this->updatingLegacySettings = false;
	}
	
	protected function install()
	{
		$this->set( $this->getDefaults() );
	}
	
	protected function migrate()
	{
		$legacy = get_option(GlobalSettings::LEGACY_TABLE_NAME);
		
		$json = json_encode($legacy);
		
		update_option(GlobalSettings::TABLE_NAME, $json, false);
	}
	
	public function jsonSerialize()
	{
		$src = Settings::jsonSerialize();
		$data = clone $src;
		
		if(isset($data->wpgmza_settings_ugm_email_address))
			unset($data->wpgmza_settings_ugm_email_address);
		
		if(isset($data->ugmEmailAddress))
			unset($data->ugmEmailAddress);

		if(isset($data->vgm_google_recaptcha_project)){
			unset($data->vgm_google_recaptcha_project);
		}

		if(isset($data->vgm_google_recaptcha_apikey)){
			unset($data->vgm_google_recaptcha_apikey);
		}

		if(isset($data->wpgmza_marker_xml_location)){
			unset($data->wpgmza_marker_xml_location);
		}

		if(isset($data->markerXmlLocation)){
			unset($data->markerXmlLocation);
		}

		/*
		 * Obscure Google API keys 
		 * 
		 * Google has started sending out emails about exposed keys, this is specifically due to our plugin localizing 
		 * the API keys in settings object, for use in autocomplete requests 
		 * 
		 * This is a false positive, but it does cause confusion with users. We will obscure it, so that, hopefully 
		 * Google no longer flags that in source code. Keys should still be restricted, this is purely a visual thing for source calls 
		 * 
		 * As of 9.0.18 (23-03-13) 
		 */
		$apikeyIndexes = array(
			'googleMapsApiKey', 'wpgmza_google_maps_api_key', 'google_maps_api_key'
		);
		foreach($apikeyIndexes as $key){
			if(!empty($data->{$key})){
				$data->{$key} = base64_encode($data->{$key});
			}
		}

		/* Developer Hook (Filter) - Allow global settings JSON serialize filtering */
		$data = apply_filters("wpgmza_global_settings_json_serialize_filter", $data);
		
		return $data;
	}
	
	public function toArray()
	{
		$src = Settings::toArray();
		$data = (array)$src;
		
		if(isset($data['wpgmza_settings_ugm_email_address']))
			unset($data['wpgmza_settings_ugm_email_address']);
		
		if(isset($data['ugmEmailAddress']))
			unset($data['ugmEmailAddress']);

		if(isset($data['vgm_google_recaptcha_project'])){
			unset($data['vgm_google_recaptcha_project']);
		}

		if(isset($data['vgm_google_recaptcha_apikey'])){
			unset($data['vgm_google_recaptcha_apikey']);
		}


		
		
		return $data;
	}
}
