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<?php

namespace WPGMZA;

/**
 * This module loads the Google Maps API unconditionally (as opposed to the GoogleMapsAPILoader)
 * @deprecated This functionality will be merged into one class with GoogleMapsAPILoader
 * @see GoogleMapsAPILoader
 */
class GoogleMapsLoader
{
    private static $googleAPILoadCalled = false;
    
    /**
     * This will be handled by the Factory class
     * @deprecated
     */
    public static function _createInstance()
    {
        return new GoogleMapsLoader();
    }
    
    /**
     * This will be handled by the Factory class
     * @deprecated
     */
    public static function createInstance()
    {
        return static::_createInstance();
    }
    
    /**
     * Gets the parameters to be sent to the Google Maps API load call
     * @return array An array of key value parameters to be passed to the load URL
     */
    protected function getGoogleMapsAPIParams()
    {
        global $wpgmza;
        
        // Locale
        $locale = get_locale();
        $suffix = '.com';
        
        switch($locale)
        {
            case 'he_IL':
                // Hebrew correction
                $locale = 'iw';
                break;
            
            case 'zh_CN':
                // Chinese integration
                $suffix = '.cn';
                break;
        }
        
        
        $locale = substr($locale, 0, 2);
        
        // Default params for google maps
        $params = array(
            'v'         => 'quarterly',
            'language'  => $locale,
            'suffix'    => $suffix
        );
        
        // Libraries
        $libraries = array('geometry', 'places', 'visualization');
        $params['libraries'] = implode(',', $libraries);
        
        // API Version
        /*if(!empty(Plugin::$settings->api_version))
        {
            // Force 3.28 if the user has a setting below this
            if(version_compare(Plugin::$settings->api_version, '3.29', '<'))
            {
                $params['v'] = '3.29';
                
                // Force greedy gesture behaviour (the default before 3.27) if the user had this set
                if(version_compare(Plugin::$settings->api_version, '3.27', '<'))
                    Plugin::$settings->force_greedy_gestures = true;
            }
            else
                $params['v'] = Plugin::$settings->api_version;
        }
        
        */
        
        // API Key
        //if(!empty($wpgmza->settings->google_maps_api_key))
            //$params['key'] = $wpgmza->settings->google_maps_api_key;
        
        //if($wpgmza->getCurrentPage() == 'map-edit')
            //$params['libraries'] = 'drawing';
        
        $key = get_option('wpgmza_google_maps_api_key');
        if(!empty($key))
            $params['key'] = $key;

        $params = apply_filters( 'wpgmza_google_maps_api_params', $params );
        
        return $params;
    }
    
    /**
     * This function loads the Google API if it hasn't been called already
     * @return void
     */
    public function loadGoogleMaps()
    {
        global $wpgmza;
        
        if(GoogleMapsLoader::$googleAPILoadCalled)
            return;
        
        $apiLoader = new GoogleMapsAPILoader();
        if(!$apiLoader->isIncludeAllowed())
            return;
        
        $params = $this->getGoogleMapsAPIParams();
        
        $suffix = $params['suffix'];
        unset($params['suffix']);
        
        $url = '//maps.google' . $suffix . '/maps/api/js?' . http_build_query($params);
        
        wp_enqueue_script('wpgmza_api_call', $url);
        
        GoogleMapsLoader::$googleAPILoadCalled = true;
        
        add_filter('script_loader_tag', array($this, 'preventOtherGoogleMapsTag'), 9999999, 3);
    }
    
    /**
     * Gets the HTML for the settings panel for this module, which appears in the general settings tab.
     * @return string The HTML string for the settings panel
     */
    public function preventOtherGoogleMapsTag($tag, $handle, $src)
    {
        if(preg_match('/maps\.google/i', $src))
        {
            if($handle != 'wpgmza_api_call') {
                return '';
            }
            
            if(!preg_match('/\?.+$/', $src))
                return str_replace($src, $src . '?' . http_build_query($this->getGoogleMapsAPIParams()), $tag);
        }

        return $tag;
    }
    
}