/*
	Based on: "Kwicks for jQuery (version 1.5.1)
	           Copyright (c) 2008 Jeremy Martin
	          http://www.jeremymartin.name/projects.php?project=kwicks
	
				Licensed under the MIT license:
					http://www.opensource.org/licenses/mit-license.php"
*/

(function($){
	$.fn.kwicks = function(options) {
		var defaults = {
			isVertical: false,
			sticky: false,
			defaultKwick: 0,
			event: 'mouseover',
			spacing: 0,
			duration: 500
		};
		var o = $.extend(defaults, options);
		var WoH = (o.isVertical ? 'height' : 'width'); // WoH = Width or Height
		var LoT = (o.isVertical ? 'top' : 'left'); // LoT = Left or Top
		
		return this.each(function() {
			container = $(this);
			var kwicks = container.children('li');
			var normWoH = kwicks.eq(0).css(WoH).replace(/px/,''); // normWoH = Normal Width or Height
			
			if(!o.max) {
				o.max = (normWoH * kwicks.size()) - (o.min * (kwicks.size() - 1));
			} else {
				o.min = ((normWoH * kwicks.size()) - o.max) / (kwicks.size() - 1);
			}
	
			container.css({
				width : (normWoH * kwicks.size()) + (o.spacing * (kwicks.size() - 1)) + 'px',
				height : kwicks.eq(0).css('height')
			});				
	

			// pre calculate left or top values for all kwicks but the first and last
			// i = index of currently hovered kwick, j = index of kwick we're calculating
			var preCalcLoTs = []; // preCalcLoTs = pre-calculated Left or Top's
			for(i = 0; i < kwicks.size(); i++) {
				preCalcLoTs[i] = [];
			}
			
			// loop through all kwick elements
			kwicks.each(function(i) {
				var kwick = $(this);
				// set initial width or height and left or top values
				// set first kwick
				if(i === 0) {
					kwick.css(LoT, '0px');
				} 
				// set last kwick
				else if(i == kwicks.size() - 1) {
					kwick.css(o.isVertical ? 'bottom' : 'right', '0px');
				}
				// correct size in sticky mode
				if(o.sticky) {
					if(o.defaultKwick == i) {
						kwick.css(WoH, o.max + 'px');
						kwick.addClass('active');
					} else {
						kwick.css(WoH, o.min + 'px');
					}
					container.bind("mouseleave", function() {
						if(i==0){
							var prevWoHs = []; // prevWoHs = previous Widths or Heights
							var prevLoTs = []; // prevLoTs = previous Left or Tops
							kwicks.stop().removeClass('active');
							for(j = 0; j < kwicks.size(); j++) {
								prevWoHs[j] = kwicks.eq(j).css(WoH).replace(/px/, '');
								prevLoTs[j] = kwicks.eq(j).css(LoT).replace(/px/, '');
							}
							var aniObj = {};
							aniObj[WoH] = o.max;
							var maxDif = o.max - prevWoHs[i];
							var prevWoHsMaxDifRatio = prevWoHs[i]/maxDif;
							kwick.addClass('active').animate(aniObj, {
								step: function(now) {
									// calculate animation completeness as percentage
									var percentage = maxDif != 0 ? now/maxDif - prevWoHsMaxDifRatio : 1;
									// adjsut other elements based on percentage
									kwicks.each(function(j) {
										if(j != i) {
											kwicks.eq(j).css(WoH, prevWoHs[j] - ((prevWoHs[j] - o.min) * percentage) + 'px');
										}
										if(j > 0 && j < kwicks.size() - 1) { // if not the first or last kwick
											kwicks.eq(j).css(LoT, prevLoTs[j] - ((prevLoTs[j] - preCalcLoTs[i][j]) * percentage) + 'px');
										}
									});
								},
								duration: o.duration,
								easing: o.easing
							});
						}								  
					})
				}
				
				kwick.css({
					margin: 0,
					position: 'absolute'
				});
				
				kwick.bind(o.event, function() {
					// calculate previous width or heights and left or top values
					var prevWoHs = []; // prevWoHs = previous Widths or Heights
					var prevLoTs = []; // prevLoTs = previous Left or Tops
					kwicks.stop().removeClass('active');
					for(j = 0; j < kwicks.size(); j++) {
						prevWoHs[j] = kwicks.eq(j).css(WoH).replace(/px/, '');
						prevLoTs[j] = kwicks.eq(j).css(LoT).replace(/px/, '');
					}
					var aniObj = {};
					aniObj[WoH] = o.max;
					var maxDif = o.max - prevWoHs[i];
					var prevWoHsMaxDifRatio = prevWoHs[i]/maxDif;
					kwick.addClass('active').animate(aniObj, {
						step: function(now) {
							// calculate animation completeness as percentage
							var percentage = maxDif != 0 ? now/maxDif - prevWoHsMaxDifRatio : 1;
							// adjsut other elements based on percentage
							kwicks.each(function(j) {
								if(j != i) {
									kwicks.eq(j).css(WoH, prevWoHs[j] - ((prevWoHs[j] - o.min) * percentage) + 'px');
								}
								if(j > 0 && j < kwicks.size() - 1) { // if not the first or last kwick
									kwicks.eq(j).css(LoT, prevLoTs[j] - ((prevLoTs[j] - preCalcLoTs[i][j]) * percentage) + 'px');
								}
							});
						},
						duration: o.duration,
						easing: o.easing
					});
				});
			});
		});
	};
})(jQuery);