/*!
 * Tiny Carousel 1.8
 * http://www.baijs.nl/tinycarousel
 *
 * CopyoPager 2010, Maarten Baijs
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.opensource.org/licenses/gpl-2.0.php
 *
 * Date: 10 / 11 / 2010
 * Depends on library: jQuery
 */
(function($){
  $.fn.tinycarousel = function(options){
    var defaults = { 
      start: 1, // where should the carousel start?
      display: 1, // how many blocks do you want to move at 1 time?
      axis: 'x', // vertical or horizontal scroller? ( x || y ).
      controls: true, // show left and right navigation buttons.
      interval: false, // move to another block on intervals.
      intervaltime: 3000, // interval time in milliseconds.
      rewind: false, // If interval is true and rewind is true it will play in reverse if the last slide is reached.
      animation: true, // false is instant, true is animate.
      duration: 1000, // how fast must the animation move in ms?
      callback: null // function that executes after every move
    };
    var options = $.extend(defaults, options);  

    var oSlider = $(this);
    var oViewport = $('.viewport:first', oSlider);
    var oContent = $('.overview:first', oSlider);
    var oPages = oContent.children();
    var oBtnNext = $('.next:first', oSlider);
    var oBtnPrev = $('.prev:first', oSlider);
    var iPageSize, iSteps, iCurrent, oTimer, bPause, bForward = true, bAxis = options.axis == 'x';

    return this.each(function(){
      initialize();
    });
    function initialize(){
      iPageSize = bAxis ? $(oPages[0]).outerWidth(true) : $(oPages[0]).outerHeight(true);
      var iLeftover = Math.ceil(((bAxis ? oViewport.outerWidth() : oViewport.outerHeight()) / (iPageSize * options.display)) -1);
      iSteps = Math.max(1, Math.ceil(oPages.length / options.display) - iLeftover);
      iCurrent = Math.min(iSteps, Math.max(1, options.start)) -2;
      oContent.css(bAxis ? 'width' : 'height', (iPageSize * oPages.length));
      move(1);
      setEvents();
    }
    function setEvents(){
      if(options.controls && oBtnPrev.length > 0 && oBtnNext.length > 0){
        oBtnPrev.click(function(){move(-1); return false;});
        oBtnNext.click(function(){move( 1); return false;});
      }
      if(options.interval){
        oSlider.hover(function(){clearTimeout(oTimer); bPause = true},function(){bPause = false; setTimer();});
      }
    }
    function setButtons(){
      if(options.controls){
        oBtnPrev.toggleClass('disable', !(iCurrent > 0));
        oBtnNext.toggleClass('disable', !(iCurrent +1 < iSteps));
      }
    }   
    function setTimer(){
      if(options.interval && !bPause){
        clearTimeout(oTimer);
        oTimer = setTimeout(function(){
          iCurrent = !options.rewind && (iCurrent +1 == iSteps) ? -1 : iCurrent;
          bForward = iCurrent +1 == iSteps ? false : iCurrent == 0 ? true : bForward;
          move((options.rewind ? (bForward ? 1 : -1) : 1));
        }, options.intervaltime);
      }
    }
    function move(iDirection){
      if(iCurrent + iDirection > -1 && iCurrent + iDirection < iSteps){
        iCurrent += iDirection;
        var oPosition = {};
        oPosition[bAxis ? 'left' : 'top'] = -(iCurrent * (iPageSize * options.display));  
        oContent.animate(oPosition,{
          queue: false,
          duration: options.animation ? options.duration : 0,
          complete: function(){
            if(typeof options.callback == 'function')
            options.callback.call(this, oPages[iCurrent], iCurrent);
          }
        });
        // setButtons();
        setTimer();
      }
    }
  };
})(jQuery);