/*
* jQuery Cycle Lite Plugin
* http://malsup.com/jquery/cycle/lite/
* Copyright (c) 2008 M. Alsup
* Version: 1.0 (06/08/2008)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* Requires: jQuery v1.2.3 or later
*/
; (function($) {

  var ver = 'Lite-1.0';

  $.fn.cycle = function(options) {
    return this.each(function() {
      options = options || {};

      if (this.cycleTimeout) clearTimeout(this.cycleTimeout);
      this.cycleTimeout = 0;
      this.cyclePause = 0;

      var $cont = $(this);
      var $slides = options.slideExpr ? $(options.slideExpr, this) : $cont.children();
      var els = $slides.get();
      if (els.length < 2) {
        if (window.console && window.console.log)
          window.console.log('terminating; too few slides: ' + els.length);
        return; // don't bother
      }

      // support metadata plugin (v1.0 and v2.0)
      var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});

      opts.before = opts.before ? [opts.before] : [];
      opts.after = opts.after ? [opts.after] : [];
      opts.after.unshift(function() { opts.busy = 0; });

      // allow shorthand overrides of width, height and timeout
      var cls = this.className;
      opts.width = parseInt((cls.match(/w:(\d+)/) || [])[1]) || opts.width;
      opts.height = parseInt((cls.match(/h:(\d+)/) || [])[1]) || opts.height;
      opts.timeout = parseInt((cls.match(/t:(\d+)/) || [])[1]) || opts.timeout;

      if ($cont.css('position') == 'static')
        $cont.css('position', 'relative');
      if (opts.width)
        $cont.width(opts.width);
      if (opts.height && opts.height != 'auto')
        $cont.height(opts.height);

      var first = 0;
      $slides.css({ position: 'absolute', top: 0, left: 0 }).hide().each(function(i) {
        $(this).css('z-index', els.length - i)
      });

      $(els[first]).css('opacity', 1).show(); // opacity bit needed to handle reinit case
      if ($.browser.msie) els[first].style.removeAttribute('filter');

      if (opts.fit && opts.width)
        $slides.width(opts.width);
      if (opts.fit && opts.height && opts.height != 'auto')
        $slides.height(opts.height);
      if (opts.pause)
        $cont.hover(function() { this.cyclePause = 1; }, function() { this.cyclePause = 0; });

      $.fn.cycle.transitions.fade($cont, $slides, opts);

      $slides.each(function() {
        var $el = $(this);
        this.cycleH = (opts.fit && opts.height) ? opts.height : $el.height();
        this.cycleW = (opts.fit && opts.width) ? opts.width : $el.width();
      });

      $slides.not(':eq(' + first + ')').css({ opacity: 0 });
      if (opts.cssFirst)
        $($slides[first]).css(opts.cssFirst);

      if (opts.timeout) {
        // ensure that timeout and speed settings are sane
        if (opts.speed.constructor == String)
          opts.speed = { slow: 600, fast: 200}[opts.speed] || 400;
        if (!opts.sync)
          opts.speed = opts.speed / 2;
        while ((opts.timeout - opts.speed) < 250)
          opts.timeout += opts.speed;
      }
      opts.speedIn = opts.speed;
      opts.speedOut = opts.speed;

      opts.slideCount = els.length;
      opts.currSlide = first;
      opts.nextSlide = 1;

      // fire artificial events
      var e0 = $slides[first];
      if (opts.before.length)
        opts.before[0].apply(e0, [e0, e0, opts, true]);
      if (opts.after.length > 1)
        opts.after[1].apply(e0, [e0, e0, opts, true]);

      if (opts.click && !opts.next)
        opts.next = opts.click;
      if (opts.next)
        $(opts.next).bind('click', function() { return advance(els, opts, opts.rev ? -1 : 1) });
      if (opts.prev)
        $(opts.prev).bind('click', function() { return advance(els, opts, opts.rev ? 1 : -1) });

      if (opts.timeout)
        this.cycleTimeout = setTimeout(function() {
          go(els, opts, 0, !opts.rev)
        }, opts.timeout + (opts.delay || 0));
    });
  };

  function go(els, opts, manual, fwd) {
    if (opts.busy) return;
    var p = els[0].parentNode, curr = els[opts.currSlide], next = els[opts.nextSlide];
    if (p.cycleTimeout === 0 && !manual)
      return;

    if (manual || !p.cyclePause) {
      if (opts.before.length)
        $.each(opts.before, function(i, o) { o.apply(next, [curr, next, opts, fwd]); });
      var after = function() {
        if ($.browser.msie)
          this.style.removeAttribute('filter');
        $.each(opts.after, function(i, o) { o.apply(next, [curr, next, opts, fwd]); });
      };

      if (opts.nextSlide != opts.currSlide) {
        opts.busy = 1;
        $.fn.cycle.custom(curr, next, opts, after);
      }
      var roll = (opts.nextSlide + 1) == els.length;
      opts.nextSlide = roll ? 0 : opts.nextSlide + 1;
      opts.currSlide = roll ? els.length - 1 : opts.nextSlide - 1;
    }
    if (opts.timeout)
      p.cycleTimeout = setTimeout(function() { go(els, opts, 0, !opts.rev) }, opts.timeout);
  };

  // advance slide forward or back
  function advance(els, opts, val) {
    var p = els[0].parentNode, timeout = p.cycleTimeout;
    if (timeout) {
      clearTimeout(timeout);
      p.cycleTimeout = 0;
    }
    opts.nextSlide = opts.currSlide + val;
    if (opts.nextSlide < 0) {
      opts.nextSlide = els.length - 1;
    }
    else if (opts.nextSlide >= els.length) {
      opts.nextSlide = 0;
    }
    go(els, opts, 1, val >= 0);
    return false;
  };

  $.fn.cycle.custom = function(curr, next, opts, cb) {
    var $l = $(curr), $n = $(next);
    $n.css({ opacity: 0 });
    var fn = function() { $n.animate({ opacity: 1 }, opts.speedIn, opts.easeIn, cb) };
    $l.animate({ opacity: 0 }, opts.speedOut, opts.easeOut, function() {
      $l.css({ display: 'none' });
      if (!opts.sync) fn();
    });
    if (opts.sync) fn();
  };

  $.fn.cycle.transitions = {
    fade: function($cont, $slides, opts) {
      $slides.not(':eq(0)').css('opacity', 0);
      opts.before.push(function() { $(this).show() });
    }
  };

  $.fn.cycle.ver = function() { return ver; };

  // @see: http://malsup.com/jquery/cycle/lite/
  $.fn.cycle.defaults = {
    timeout: 6000,
    speed: 1000,
    next: null,
    prev: null,
    before: null,
    after: null,
    height: 'auto',
    sync: 1,
    fit: 0,
    pause: 0,
    delay: 0,
    slideExpr: null
  };

})(jQuery);