/* =========================================================
// jquery.fufade.js 1.1
// Chris McKee <pcdevils@gmail.com> 2008-10
// chrismckee.co.uk // http://bit.ly/chrisisagit
// re-coded & optimized for size + functionality
// Based on innerfade - see git for details
// ========================================================= */
/*
 * Default Settings
 * | Name            |  Default  | Type                 |
 * | type            | sequence  | sequence or random   |
 * | timeout         | 2 seconds | Microseconds (2000=2)|
 * | containerheight | auto      | Pixels               |
 * | runningclass    | fufade    | class name           |
 * | children        | definer   | null                 |
 * |____________________________________________________|
 */

(function ($) {
  var settings, elements, i, current, last, prev, next, fuTimer, nextbtn, backbtn;

  //Main
  $.fn.fuFade = function (options) {
    return this.each(function () {
      $.fuFade(this, options);
    });
  };

  $.fuFade = function (container, options) {
    settings = {
      'speed': 'normal',
      'type': 'sequence',
      'timeout': 2000,
      'containerheight': 'auto',
      'runningclass': 'fufade',
      'children': null
    };

    if (options) {
      $.extend(settings, options);
    }

    elements = (settings.children === null) ? $(container).children() : elements = $(container).children(settings.children);

    if (elements.length > 1) {

	  nextbtn = $(".nextbtn"); backbtn = $(".backbtn");
	  $(container).css({'position': 'relative', 'height': settings.containerheight}).addClass(settings.runningclass);

      for (i = 0; i < elements.length; i++) {
		$(elements[i]).css({'z-index': String(elements.length - i), 'position': 'absolute'}).hide();
      }

      nextbtn.bind('click', function () {
        fuTimer = setTimeout(function () {
          $.fuFade.next(elements, settings, 1, 0, fuTimer);
        }, 0);
      });
      //wake up back button
      backbtn.fadeTo("fast", 0.5);

      if (settings.type === "sequence") {
        setTimeout(function () {
          $.fuFade.next(elements, settings, 1, 0);
        }, settings.timeout);
        $(elements[0]).show();
      } else if (settings.type === "random") {
        last = Math.floor(Math.random() * (elements.length));
        setTimeout(function () {
          do {
            current = Math.floor(Math.random() * (elements.length));
          } while (last === current);
          $.fuFade.next(elements, settings, current, last);
        }, settings.timeout);
        $(elements[last]).show();
      } else if (settings.type === 'random_start') {
        settings.type = 'sequence';
        current = Math.floor(Math.random() * (elements.length));
        setTimeout(function () {
          $.fuFade.next(elements, settings, (current + 1) % elements.length, current);
        }, settings.timeout);
        $(elements[current]).show();
      } else {
        try {
          console.log('fuFade-Type must either be \'sequence\' or \'random\'');
        } catch (e) {}
      }
    }
  };

  $.fuFade.next = function (elements, settings, current, last, fuTimer) {
    clearTimeout(fuTimer);

    next = current === (elements.length - 1) ? 0 : current + 1;
    prev = current === 0 ? elements.length - 1 : prev = current - 1;

    for (i = 0; i < elements.length; i++) {
      if ((i !== last) && (i !== current)) {
        $(elements[i]).css({ "left": 0, "top":0, "z-index": '1' }).fadeOut(settings.speed);
      }
    }
    $(elements[last]).css('z-index', '190');
    $(elements[current]).css('z-index', '195');


    //Button Binding
    //Next
    nextbtn.unbind('click');
    nextbtn.bind('click', function () {
      clearTimeout(fuTimer);
      $.fuFade.next(elements, settings, next, current, fuTimer);
      return false;
    });
    //Back
    backbtn.unbind('click');
    backbtn.bind('click', function () {
      clearTimeout(fuTimer);
      $.fuFade.next(elements, settings, prev, current, fuTimer);
      return false;
    });

    //Fade Animation
    $(elements[last]).fadeOut(settings.speed);
    $(elements[current]).fadeIn(settings.speed, function () {
      $.fuFade.removeFilter($(this)[0]);
    });
    backbtn.fadeTo("fast", 1);

    //Images in Sequence
    if (settings.type === "sequence") {
      if ((current + 1) < elements.length) {
        current = current + 1;
        last = current - 1;
      } else {
        current = 0;
        last = elements.length - 1;
      }
    }
    //endbutton binding   
    fuTimer = setTimeout(function () {
      $.fuFade.next(elements, settings, next, prev, fuTimer);
    }, settings.timeout);
  };

  // **** remove Opacity-Filter in ie ****
  $.fuFade.removeFilter = function (element) {
    if (element.style.removeAttribute) {
      element.style.removeAttribute('filter');
    }
  };
})(jQuery);