function strip(str) {
  return str && str.replace(/^\s+|\s+$/g, '');
}

google.load("language", "1");
google.setOnLoadCallback(function() {

  function translate(input_lang, output_lang, text, ele) {
    if (input_lang == output_lang) return ele.text(text);
    if (input_lang == "en" || output_lang == "en") {
      google.language.translate(text, input_lang, output_lang, function(result) {
        ele.html(strip((result.error && result.error.message) || result.translation));
      });

    } else {
      google.language.translate(text, input_lang, "en", function(result) {
        text = strip((result.error && result.error.message) || result.translation);
        google.language.translate(text, "en", output_lang, function(result) {
          ele.html(strip((result.error && result.error.message) || result.translation));
        });
      });
    }
  }

  function translate_textarea() {
    var text_src = document.getElementById("foreign").value;
    if (strip(text_src) == "") return;
    
    var output_lang = getViewerLanguage();    
    var div = jQuery('<div><p class="input"></p><p class="result"></p></div>').insertBefore(document.getElementById('output').firstChild);
    var result_p = jQuery('.result', div);
    var input_p = jQuery('.input', div);
    input_p.text(text_src);
    result_p.text(jQuery('#plswait').text());
    google.language.detect(input_p.text(), function(result) {
      translate(result.language, output_lang, input_p.text(), result_p);
      //translate("lt", output_lang, input_p.text(), result_p);
      input_p.addClass(result.language)[0].title = jQuery("#otherlang a[href='#" + result.language + "']").text() + " " + result.language;
      result_p.addClass(output_lang)[0].title = jQuery("#otherlang a[href='#" + output_lang + "']").text() + " " + output_lang;
      jQuery('#otherlang a').removeClass('current');
      jQuery("#otherlang a[href='#" + output_lang + "']").addClass('current');
    });
  }

  function Set_Cookie( name, value, expires, path, domain, secure )
{

    var today = new Date();
    today.setTime( today.getTime() );

    if ( expires )
    {
    expires = expires * 1000 * 60 * 60 * 24;
    }
    var expires_date = new Date( today.getTime() + (expires) );

    document.cookie = name + "=" +escape( value ) +
    ( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
    ( ( path ) ? ";path=" + path : "" ) +
    ( ( domain ) ? ";domain=" + domain : "" ) +
    ( ( secure ) ? ";secure" : "" );
}
  
  function Get_Cookie( check_name ) {
	// first we'll split this cookie up into name/value pairs
	// note: document.cookie only returns name=value, not the other components
	var a_all_cookies = document.cookie.split( ';' );
	var a_temp_cookie = '';
	var cookie_name = '';
	var cookie_value = '';
	var b_cookie_found = false; // set boolean t/f default f

	for ( i = 0; i < a_all_cookies.length; i++ )
	{
		// now we'll split apart each name=value pair
		a_temp_cookie = a_all_cookies[i].split( '=' );
		// and trim left/right whitespace while we're at it
		cookie_name = a_temp_cookie[0].replace(/^\s+|\s+$/g, '');

		// if the extracted name matches passed check_name
		if ( cookie_name == check_name )
		{
			b_cookie_found = true;
			// we need to handle case where cookie has no value but exists (no = sign, that is):
			if ( a_temp_cookie.length > 1 )
			{
				cookie_value = unescape( a_temp_cookie[1].replace(/^\s+|\s+$/g, '') );
			}
			// note that in cases where cookie is initialized but no value, null is returned
			return cookie_value;
			break;
		}
		a_temp_cookie = null;
		cookie_name = '';
	}
	if ( !b_cookie_found )
	{
		return null;
	}
}

  function setViewerLanguage(newlang) {  
    if ( newlang ) {
        Set_Cookie( 'vertimas_lang', newlang, 5, '/' );
    }   
    var cookie_val = Get_Cookie( 'vertimas_lang' );
    if ( !newlang ) {      
        newlang = cookie_val;
    }   
    if (newlang) {   
        window.location.hash = '#' + newlang;
    }
    translate_textarea();
  }
  
  jQuery('#foreign').val((getViewerLanguage().match(/^lt/) ? "Hello, I am your online translator." : "Sveiki, aš esu Jūsų internetinis vertėjas.")).focus().select();
  
  setViewerLanguage();
  jQuery.each(languages, function(index, pair) {
     jQuery('<a href="#' + pair[0] + '">' + pair[1] + '</a>').appendTo('#otherlang').click(function() {
       setViewerLanguage(pair[0]);
       return false;
     });
     if (languages[index+1]) {
       jQuery('<span> | </span>').appendTo('#otherlang');
     }
  });
  
  var old_text = jQuery('#foreign').val();
  var old_timer = null;
  function watch() {
    var new_text = jQuery('#foreign').val();
    if (! old_text) {
      old_text = new_text;
    } else if (new_text != old_text) {
      if (old_timer) clearTimeout(old_timer);
      old_text = new_text;
      if (strip(new_text) != "") {
        old_timer = setTimeout(translate_textarea, 1300);
      }
    }
  }
  setInterval(watch, 400);  
});