/*
	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

	Any and all use of this script must be accompanied by this copyright/license notice in its present form.
*/

(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
		var lastOne;

		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);
			}
			// set width of container ul
			if (o.isVertical) {
				container.css({
					width: kwicks.eq(0).css('width'),
					height: (normWoH * kwicks.size()) + (o.spacing * (kwicks.size() - 1)) + 'px'
				});
			} else {
				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] = [];
				// don't need to calculate values for first or last kwick
				for (j = 1; j < kwicks.size() - 1; j++) {
					if (i == j) {
						preCalcLoTs[i][j] = o.isVertical ? j * o.min + (j * o.spacing) : j * o.min + (j * o.spacing);
					} else {
						preCalcLoTs[i][j] = (j <= i ? (j * o.min) : (j - 1) * o.min + o.max) + (j * o.spacing);
					}
				}
			}

			// 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');
				}
				// set all other kwicks
				else {
					if (o.sticky) {
						kwick.css(LoT, preCalcLoTs[o.defaultKwick][i]);
					} else {
						kwick.css(LoT, (i * normWoH) + (i * o.spacing));
					}
				}
				// 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');
					}
				}
				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;

							// adjust 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');

									//Animate padding
									//Decrease it from 40 to 0 on all kwicks except the active one
									if (kwicks.eq(j).find(".sideA").css("padding-left") != "0px") {
										kwicks.eq(j).find(".sideA").css("padding-left", Math.round(40 - (40 * percentage)) + 'px');
									}

								} else if (kwicks.eq(i).find(".sideA").css("padding-left") != "40px") {
									kwicks.eq(i).find(".sideA").css("padding-left", Math.round(40 * 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
					});
					lastOne = i;
				});
			});
			if (!o.sticky) {
				container.bind("mouseleave", function () {

					var prevWoHs = [];
					var prevLoTs = [];
					kwicks.removeClass('active').stop();
					for (i = 0; i < kwicks.size(); i++) {
						prevWoHs[i] = kwicks.eq(i).css(WoH).replace(/px/, '');
						prevLoTs[i] = kwicks.eq(i).css(LoT).replace(/px/, '');
					}
					var aniObj = {};
					aniObj[WoH] = normWoH;
					var normDif = normWoH - prevWoHs[0];
					kwicks.eq(0).animate(aniObj, {
						step: function (now) {
							var percentage = normDif != 0 ? (now - prevWoHs[0]) / normDif : 1;

							if (0 != lastOne) {
								kwicks.eq(0).find(".sideA").css("padding-left", Math.round(40 * percentage) + 'px');
							}

							for (i = 1; i < kwicks.size(); i++) {
								kwicks.eq(i).css(WoH, prevWoHs[i] - ((prevWoHs[i] - normWoH) * percentage) + 'px');

								//Animate padding
								//increase it from 0 to 40 on all kwicks except the hovered one
								if (i != lastOne) {
									kwicks.eq(i).find(".sideA").css("padding-left", Math.round(40 * percentage) + 'px');
								}

								if (i < kwicks.size() - 1) {
									kwicks.eq(i).css(LoT, prevLoTs[i] - ((prevLoTs[i] - ((i * normWoH) + (i * o.spacing))) * percentage) + 'px');
								}
							}
						},
						duration: o.duration,
						easing: o.easing
					});
				});
			}
		});
	};
})(jQuery);