(function($) {

  jQuery('input[name^="cache"]').tipTip({'delay' : 0, 'fadeIn' : 200, 'fadeOut' : 200});
  $('div.infos').delay(4000).slideUp('slow', function() { $('div.infos').hide(); });

  var loader = new ImageLoader( {onChanged: loaderChanged, maxRequests:1 } )
    , pending_next_page = null
    , last_image_show_time = 0
    , allDoneDfd, urlDfd;

  jQuery.gdThumb_start = function () {

    allDoneDfd = jQuery.Deferred();
    urlDfd = jQuery.Deferred();

    allDoneDfd.always( function() {
      jQuery("#startLink").removeAttr('disabled').css("opacity", 1);
      jQuery("#pauseLink,#stopLink").attr('disabled', true).css("opacity", 0.5);
    });

    urlDfd.always( function() {
      if (loader.remaining()==0)
        allDoneDfd.resolve();
    });

    setTimeout( function() {
      jQuery('#generate_cache').show();
      jQuery("#startLink").attr('disabled', true).css("opacity", 0.5);
      jQuery("#pauseLink,#stopLink").removeAttr('disabled').css("opacity", 1);
      },
    0 );

    loader.pause(false);
    updateStats();
    getUrls(0);

  }

  jQuery.gdThumb_pause = function () {
    loader.pause( !loader.pause() );
  }

  jQuery.gdThumb_stop = function () {
    loader.clear();
    urlDfd.resolve();
  }

function getUrls(page_token) {
  data = {prev_page: page_token, max_urls: 500, types: []};
  jQuery.post( 'admin.php?page=plugin-GDThumb&getMissingDerivative=',
    data, wsData, "json").fail( wsError );
}

function wsData(data) {
  loader.add( data.urls );
  if (data.next_page) {
    if (loader.pause() || loader.remaining() > 100) {
      pending_next_page = data.next_page;
    }
    else {
      getUrls(data.next_page);
    }
  }
}

function wsError() {
  urlDfd.reject();
}

function updateStats() {
  jQuery("#loaded").text( loader.loaded );
  jQuery("#errors").text( loader.errors );
  jQuery("#remaining").text( loader.remaining() );

  if (loader.remaining() == 0) {
    jQuery("#startLink").attr('disabled', false).css("opacity", 1);
    jQuery("#pauseLink,#stopLink").attr('disabled', true).css("opacity", 0.5);
  }
}

function loaderChanged(type, img) {
  updateStats();
  if (img) {
    if (type==="load") {
      var now = jQuery.now();
      if (now - last_image_show_time > 3000) {
        last_image_show_time = now;
        var h=img.height, url=img.src;
        jQuery("#feedbackWrap").hide("slide", {direction:'down'}, function() {
          last_image_show_time = jQuery.now();
          if (h > 300 )
            jQuery("#feedbackImg").attr("height", 300);
          else
            jQuery("#feedbackImg").removeAttr("height");
          jQuery("#feedbackImg").attr("src", url);
          jQuery("#feedbackWrap").show("slide", {direction:'up'} );
          } );
      }
    }
    else {
      jQuery("#errorList").prepend( '<a href="'+img.src+'">'+img.src+'</a>' + "<br>");
    }
  }
  if (pending_next_page && 100 > loader.remaining() ) {
    getUrls(pending_next_page);
    pending_next_page = null;
  }
  else if (loader.remaining() == 0 && jQuery.isFunction(urlDfd.isResolved) && (urlDfd.isResolved() || urlDfd.isRejected())) {
    allDoneDfd.resolve();
  }
}

})(jQuery);