(function($) { // Compliant with jquery.noConflict()
  $.fn.jCarouselLite = function(o) {
    o = $.extend({
      btnPrev: null,
      btnNext: null,
      btnGo: null,
      mouseWheel: false,
      auto: null,

      speed: 200,
      easing: null,

      vertical: false,
      circular: true,
      visible: 3,
      start: 0,
      scroll: 1,
      rows: 1, // MIG: HACK!: Property to allow multiple rows

      beforeStart: null,
      afterEnd: null
    }, o || {});

    return this.each(function() { // Returns the element collection. Chainable.

      var running = false, animCss = o.vertical ? "top" : "left", sizeCss = o.vertical ? "height" : "width";
      var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;
      var rowCss = o.vertical ? "width" : "height"; // MIG: HACK!: rowCss is used to set the height/width of the viewport based on how many rows are showing

      if (o.circular) {
        ul.prepend(tLi.slice(tl - v - 1 + 1).clone()).append(tLi.slice(0, v).clone());
        o.start += v;
      }

      var li = $("li", ul), itemLength = li.size(), curr = o.start;
      div.css("visibility", "visible");

      li.css({ overflow: "hidden", float: o.vertical ? "none" : "left" });
      ul.css({ margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1" });
      div.css({ overflow: "hidden", position: "relative", "z-index": "2", left: "0px" });

      var liSize = o.vertical ? height(li) : width(li);               // Full li size(incl margin)-Used for animation
      var liRowSize = o.vertical ? width(li) : height(li);            // MIG: HACK!: size of the li's row
      var ulSize = ((liSize * itemLength) / o.rows) + (liSize / 1.5); // size of full ul(total length, not just for the visible items)
      var divSize = liSize * v;                                       // size of entire div(total length for just the visible items)
      var rowSize = liRowSize * o.rows;                               // MIG: HACK!: gets the size in pixels of the height/width of the viewport

      li.css({ width: li.width(), height: li.height() });
      ul.css(sizeCss, ulSize + "px").css(animCss, -(curr * liSize));

      div.css(sizeCss, divSize + "px"); // Width of the DIV. length of visible images
      div.css(rowCss, rowSize + "px");  // MIG: HACK!: Height of the DIV

      // MIG: HACK!: special consideration for vertical carousels with multiple rows
      if (o.vertical && o.rows > 1) {
        ul.children().filter(function(index) {
          return ((index + 1) % o.rows > 0);
        }).css({ float: "left", width: "" });
      }

      if (o.btnPrev)
      $(o.btnPrev).click(function() {
        return go(curr - (o.scroll));
      });

      if (o.btnNext)
      $(o.btnNext).click(function() {
        return go(curr + (o.scroll));
      });

      if (o.btnGo)
      $.each(o.btnGo, function(i, val) {
        $(val).click(function() {
          return go(o.circular ? o.visible + i : i);
        });
      });

      if (o.mouseWheel && div.mousewheel)
      div.mousewheel(function(e, d) {
        return d > 0 ? go(curr - o.scroll) : go(curr + o.scroll);
      });

      if (o.auto)
      setInterval(function() {
        go(curr + o.scroll);
      }, o.auto + o.speed);

      function vis() {
        return li.slice(curr).slice(0, v);
      };

      function go(to) {
        if (!running) {
          if (o.beforeStart)
          o.beforeStart.call(this, vis());

          if (o.circular) { // If circular we are in first or last, then goto the other end
            if (to <= o.start - v - 1) { // If first, then goto last
              ul.css(animCss, -((itemLength - (v * 2)) * liSize) + "px");
              // If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements.
              curr = to == o.start - v - 1 ? itemLength - (v * 2) - 1 : itemLength - (v * 2) - o.scroll;
            } else if (to >= itemLength - v + 1) { // If last, then goto first
              ul.css(animCss, -((v) * liSize) + "px");
              // If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements.
              curr = to == itemLength - v + 1 ? v + 1 : v + o.scroll;
            } else curr = to;
          } else { // If non-circular and to points to first or last, we just return.
            // MIG: HACK!: This determines when to stop scrolling when more than 1 row is viewable
            if (to < 0 || to > ((itemLength - v) / o.rows)) return;
              else curr = to;
          } // If neither overrides it, the curr will still be "to" and we can proceed.

          running = true;

          ul.animate(
            animCss == "left" ? { left: -(curr * liSize)} : { top: -(curr * liSize) }, o.speed, o.easing,
            function() {
              if (o.afterEnd)
              o.afterEnd.call(this, vis());
              running = false;
            }
          );
          // Disable buttons when the carousel reaches the last/first, and enable when not
          if (!o.circular) {
            $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
            // MIG: HACK!: This determines when to add the disabled class to the link when more than 1 row is viewable
            $((curr - o.scroll < 0 && o.btnPrev) ||
              (curr + o.scroll > ((itemLength - v) / o.rows) && o.btnNext) || []
          ).addClass("disabled");
        }

      }
      return false;
    };
  });
};

function css(el, prop) {
  return parseInt($.css(el[0], prop)) || 0;
};
function width(el) {
  return el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
};
function height(el) {
  return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
};

})(jQuery);