<?php

namespace MGModule\DNSManager2\mgLibs;
use MGModule\DNSManager2\mgLibs\custom\helpers as helpers;
use MGModule\DNSManager2 as main;

/**
 * Simple class to translating languages
 * 
 * @author Michal Czech <michael@modulesgarden.com>
 */
class lang
{
   private static $instance;
   private $dir;
   private $langs = array();
   private $currentLang;
   
   private $fillLangFile = true;
   public $context = array();
   private $staggedContext = array();
   private $missingLangs = array();
   
   private function __construct() {} 
   private function __clone(){}
 
   /**
    * Get Single-ton Instance
    * 
    * @author Michal Czech <michael@modulesgarden.com>
    * @param type $dir
    * @param type $lang
    * @return lang
    */
   public static function getInstance ($dir = null, $lang = null)
   {
        if (self::$instance === null) 
        {
            self::$instance = new self();
            self::$instance->dir = $dir;
            self::$instance->loadLang('english');
            
            self::$instance->fillLangFile = process\mainInstance::I()->isDebug();
            
            if(!$lang)
            {
               $lang = self::getLang();
            }
            
            if($lang && $lang != 'english')
            {
                self::$instance->loadLang($lang);
            }
        }
        return self::$instance;
   }
   
   public static function getMissingLangs(){
       return self::$instance->missingLangs;
   }

   /**
    * Get Current Lang Name
    * 
    * @author Michal Czech <michael@modulesgarden.com>
    * @return string
    */
    public static function getLang()
    {

        //TODO
        $language = '';
        if(main\addon::isAdminArea() && $_SESSION['adminid'])
        {
            $row = main\mgLibs\MySQL\query::query("SELECT language FROM tbladmins WHERE id = ".$_SESSION['adminid'])->fetch();
            if($row['language'])
            {
                $language = $row['language'];
            }
        }
        elseif(isset($_SESSION['Language'])) // GET LANG FROM SESSION
        { 
            $language = strtolower($_SESSION['Language']);
        }
        elseif(isset($_SESSION['uid']))
        {
            $row = main\mgLibs\MySQL\query::query("SELECT language FROM tblclients WHERE id = ".$_SESSION['uid'])->fetch();
            if($row['language'])
            {
                $language = $row['language'];
            }
        }

        if(!$language)
        {
            $row = main\mgLibs\MySQL\query::query("SELECT value FROM tblconfiguration WHERE setting = 'Language' LIMIT 1")->fetch();
            $language = $row['value'];
        }

        if(!$language)
        {
            $language = 'english';
        }

        return strtolower($language);
    }
   
    /**
     * Get Avaiable Translations
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     * @return type
     */
    public static function getAvaiable()
    {
       $langArray = array();
       $handle = opendir(self::$instance->dir);

       while (false !== ($entry = readdir($handle))) {
            list($lang,$ext) = explode('.',$entry);
            if($lang && isset($ext) && strtolower($ext) == 'php')
            {
                $langArray[] = $lang;
            }
       }
       
       return $langArray;
    }

    /**
     * Load Lang File
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     * @param string $lang Lang Name
     */
    public static function loadLang($lang)
    {       
       $file = self::getInstance()->dir.DS.$lang.'.php';
       if(file_exists($file))
       {
            include $file;
            self::getInstance()->langs = array_merge(self::getInstance()->langs,$_LANG);
            self::getInstance()->currentLang = $lang;
       }
    }
   
    /**
     * Set Lang Context
     * 
     * Given parameters are lang levels
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     */
    public static function setContext(){
       self::getInstance()->context = array();
       foreach(func_get_args() as $name)
       {
           self::getInstance()->context[] = $name;
       }
    }
   
    /**
     * Add levels at stack upwards 
     * 
     * Given parameters are lang levels
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     */
    public static function addToContext(){
       foreach(func_get_args() as $name)
       {
           self::getInstance()->context[] = $name;
       }
    }
   
    /**
     * Stag Current levels stack
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     * @param string $stagName
     */
    public static function stagCurrentContext($stagName){
        self::getInstance()->staggedContext[$stagName] = self::getInstance()->context;
    }
   
    /**
     * Restore Lang levels from stag
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     * @param string $stagName
     */
    public static function unstagContext($stagName){
       if(isset(self::getInstance()->staggedContext[$stagName]))
       {
           self::getInstance()->context = self::getInstance()->staggedContext[$stagName];
           unset(self::getInstance()->staggedContext[$stagName]);
       }
    }

    /**
     * Get Translated Lang
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     * @return string
     */
    public static function T()
    {
       $lang = self::getInstance()->langs;

       $history = array();

       foreach(self::getInstance()->context as $name)
       {
           if(isset($lang[$name]))
           {
               $lang = $lang[$name];
           }
           $history[] = $name;
       }
       
       $returnLangArray = false;
       
       foreach(func_get_args() as $find)
       {
           if($find == 'you_cannot_edit_this_zone_because_it_is_terminated_on_server')
           {
               $t = true;
           }
           
           
           $history[] = $find;
           if(isset($lang[$find]))
           {
               if(is_array($lang[$find]))
               {
                   $lang = $lang[$find];
               }
               else
               {
                   return htmlentities($lang[$find]);
               }
           }
           else
           {
               
               if(self::getInstance()->fillLangFile)
               {
                   $returnLangArray = true;
               }
               else
               {
                   return htmlentities($find);
               }
           }
       }

       if($returnLangArray)
       {
           $last = end($history); //reset($history) 
           $exp = explode("_", $last);
           array_walk($exp, function(&$item){$item = ucfirst($item);});
           self::getInstance()->missingLangs['$'."_LANG['".implode("']['", $history)."']"] = "\"" . implode(" ", $exp) . '";';
           return '$'."_LANG['".implode("']['", $history)."']";
           //self::getInstance()->missingLangs['$'."_LANG['".implode("']['", $history)."']"] = implode(" ", array_slice($history, -3, 3, true));
           //return '$'."_LANG['".implode("']['", $history)."']";
       }

       if(is_array($lang) && self::getInstance()->fillLangFile)
       {
           self::getInstance()->missingLangs['$'."_LANG['".implode("']['", $history)."']"] = implode(" ", array_slice($history, -3, 3, true));
           return '$'."_LANG['".implode("']['", $history)."']";
       }
       
       return htmlentities($find);
   }
   
    /**
     * Get Translated Absolute Lang 
     * 
     * @author Michal Czech <michael@modulesgarden.com>
     * @return string
     */
   public static function absoluteT(){
       $lang = self::getInstance()->langs;
       
       $returnLangArray = false;
       
       foreach(func_get_args() as $find)
       {
           $history[] = $find;
           if(isset($lang[$find]))
           {
               if(is_array($lang[$find]))
               {
                   $lang = $lang[$find];
               }
               else
               {
                   return htmlentities($lang[$find]);
               }
           }
           else
           {
               
               if(self::getInstance()->fillLangFile)
               {
                   $returnLangArray = true;
               }
               else
               {
                    return htmlentities($find);
               }
           }
       }
       
       if($returnLangArray)
       {
           $last = end($history); //reset($history) 
           $exp = explode("_", $last);
           array_walk($exp, function(&$item){$item = ucfirst($item);});
           self::getInstance()->missingLangs['$'."_LANG['".implode("']['", $history)."']"] = "\"" . implode(" ", $exp) . '";';
           return '$'."_LANG['".implode("']['", $history)."']";
           //self::getInstance()->missingLangs['$'."_LANG['".implode("']['", $history)."']"] = implode(" ", array_slice($history, -3, 3, true));
           //return '$'."_LANG['".implode("']['", $history)."']";
       }
       
//       if($returnLangArray)
//       {
//           self::getInstance()->missingLangs['$'."_LANG['".implode("']['", $history)."']"] = implode(" ", array_slice($history, -3, 3, true));
//           return '$'."_LANG['".implode("']['", $history)."']";
//       }
       
       return htmlentities($lang);
   }
}