/** 
 * Copyright (c) 2009 Sylvain Gougouzian (sylvain@gougouzian.fr)
 * MIT (http://www.opensource.org/licenses/mit-license.php) licensed.
 * GNU GPL (http://www.gnu.org/licenses/gpl.html) licensed.
 *
 * jQuery carrousel effects by Sylvain Gougouzian http://sylvain.gougouzian.fr
 *
 * Version: 1.0
 *
 * Requires: jQuery 1.3.2+ 	// http://www.jquery.com
 *			jQuery corner plugin 2.01 // http://jquery.malsup.com/corner/
 *
 * Compatible : Internet Explorer 6+, Firefox 1.5+, Safari 3+, Opera 9+, Chrome 0.9+
 */

jQuery(function($) {
	$.extend($.fn.carrousel.effects.init,{
		corner: function (carrousel) {
			$.fn.corner.defaults.useNative = false;
            $('.carrousel_item',carrousel.container).corner("10px");
		},
		reflection: function (carrousel) {
			if (carrousel.vertical) {
				carrousel.block.height *= 1.33;
			}
			carrousel.container.height(parseInt(carrousel.container.height()) * 1.33);
			$('.carrousel_item > img').load(function () {
				reflect(this);
			});
		},
		relief: function (carrousel){
			carrousel.incrementPercent = parseInt(50 / (parseInt(carrousel.opts.dispNumber) - 3));
			$('.carrousel_item', carrousel.container).each(function () {
				var size = get3Dsize(carrousel, $(this).attr('rel'), 0);
				$('> ' + carrousel.opts.mode, this).load(function (){
					$(this).width(parseInt(carrousel.block.width * (size / 100)) + 'px').height(parseInt(carrousel.block.height * (size / 100)) + 'px');
					$(this).parent().width(parseInt(carrousel.block.width * (size / 100)) + 'px').height(parseInt(carrousel.block.height * (size / 100)) + 'px');
					carrousel._alignItem($(this).parent());
				});
			});
		}
	});
	
	$.extend($.fn.carrousel.effects.before,{
		fade: function (carrousel) {
			$('.carrousel_item',carrousel.container).fadeTo(parseInt(carrousel.opts.speed / 2), 0.5);
		},
		relief: function (carrousel, direction) {
			var move = direction * (carrousel.dep == -1 ? carrousel.opts.scroll : carrousel.dep);
			$('.carrousel_item', carrousel.container).each(function () {
				var size = get3Dsize(carrousel, $(this).attr('rel'), move);
				var nWidth = parseInt(carrousel.block.width * size / 100) + 'px';
	            var nHeight = parseInt(carrousel.block.height * size / 100) + 'px';
				$('.carrousel_item, .carrousel_item > ' + carrousel.opts.mode, $(this).parent()).animate({
					width: nWidth,
					height: nHeight,
					left: carrousel._getAlignWidth(parseInt(nWidth)),
					top: carrousel._getAlignHeight(parseInt(nHeight))
				}, carrousel.opts.speed);
			});
		}
	});

	function reflect(img) {
		var $this = $(img);
		var w = parseInt($this.width());
		var h = parseInt($this.height());
		var r;
		if ($.browser.msie) {
			r = $("<img />").attr('src', $this.attr('src')).css({
				'width': w,
				'height': h,
				'margin-bottom': h - Math.floor(h * 0.33),
				'filter': "flipv progid:DXImageTransform.Microsoft.Alpha(opacity=50, style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy=33)"
			})[0];
		}
		else {
			r = $("<canvas />")[0];
			if (!r.getContext) { return; }
			var f = r.getContext("2d");
			try {
				$(r).attr({
					'width': w,
					'height': Math.floor(h * 0.33)
				});
				f.save();
				f.translate(0, h - 1);
				f.scale(1, -1);
				f.drawImage(img, 0, 0, w, h);
				f.restore();
				f.globalCompositeOperation="destination-out";
				var i = f.createLinearGradient(0, 0, 0, Math.floor(h * 0.33));
				i.addColorStop(0, "rgba(255, 255, 255, 0.5)");
				i.addColorStop(1, "rgba(255, 255, 255, 1.0)");
				f.fillStyle = i;
				f.rect(0, 0, w, Math.floor(h * 0.33));
				f.fill();
			}
			catch (e) {
				return;
			}
		}
		$(r).css('display', 'block');
		$this.parent().css({
			width: w,
			height: h + Math.floor(h * 0.33),
			overflow:"hidden"
		}).append($(r));
		return false;
	}	

	function unreflect($this) {
		var html = $this.parent().html();
		$this.parent().parent().html(html);
		return false;
	}

	$.extend($.fn.carrousel.effects.after,{
		fade: function (carrousel) {
			$('.carrousel_item',carrousel.container).fadeTo(parseInt(carrousel.opts.speed / 2), 1.0);
		}
	});

	function get3Dsize(carrousel, i, add){
	    var min = carrousel.current + add;
		if (min < 0)
			min += (carrousel.nbItems / 2);
	    min = carrousel._realpos(min);
	    var max = parseInt(carrousel.opts.dispNumber) + min - 1;
	    max = carrousel._realpos(max);
	    var moy = parseInt(carrousel.opts.dispNumber / 2) + min;
	    moy = carrousel._realpos(moy);
		var j = i;
	    i = carrousel._realpos(i);
		var res = 0;
		if ((i == min) || (i == max)) {
			res = 50;
		}
		else {
			if (i == moy) {
				res = 100;
			}
			else {
				if (min < max) {
					if ((i > min) && (i < max)) {
						res = 50 + Math.abs(moy - i) * carrousel.incrementPercent;
					}
					else {
						res = 50 - carrousel.incrementPercent;
					}
				}
				else {
					if ((i < (carrousel.nbItems / 2)) && (i > min)) {
						if (moy == 0) {
							moy = (carrousel.nbItems / 2);
						}
						res = 50 + Math.abs(moy - i) * carrousel.incrementPercent;
					}
					else {
						if ((i >= 0) && (i < max)) {
							if (moy == ((carrousel.nbItems / 2) - 1)) {
								moy = 1;
							}
							res = 50 + Math.abs(moy - i) * carrousel.incrementPercent;
						}
						else {
							res = 50 - carrousel.incrementPercent;
						}
					} 
				}
			}
		}
		carrousel.aItems.eq(j).css('z-index', carrousel.opts.dispNumber - Math.abs(moy - i));
	    return res;
	}

});