/*
	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
		
		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) 
				{
				    
				    if((o.defaultKwick==0)&&(o.sticky))
				    {
				        //fix for end caps not displaying correctly when sticky
				        kwick.children('a').addClass('active');
				    }
				    
					kwick.css(LoT, '0px');
				} 
				// set last kwick
				else if(i == kwicks.size() - 1) 
				{
				    if((o.defaultKwick==kwicks.size()-1)&&(o.sticky)){kwick.children('a').addClass('active');}
				    
					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;
					
					//fix for sticky end caps
					kwicks.eq(0).children('a').removeClass('active');
					kwicks.eq(kwicks.size()-1).children('a').removeClass('active');	
					//end fix	
					
					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
					});
				});
			});
			
			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;
							for(i = 1; i < kwicks.size(); i++) {
								kwicks.eq(i).css(WoH, prevWoHs[i] - ((prevWoHs[i] - normWoH) * 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
						
						
					});
					
				});
			}
			else
			{
			    for(i = 0; i < kwicks.size(); i++) {
			        if(i==0)
			        {
			            //fix for sticky end caps
			            kwicks.eq(0).bind("mouseleave",function()
			            {
			                if(o.defaultKwick==0){kwicks.eq(0).children('a').addClass('active');}
			                
			                //DGK animation if the leave event is on the first or last node
			                var prevWoHs = [];
					        var prevLoTs = [];
			                kwicks.removeClass('active').stop();
			                kwicks.eq(0).children('a').removeClass('active');
			                
			                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;
							    for(i = 1; i < kwicks.size(); i++) {
								    kwicks.eq(i).css(WoH, prevWoHs[i] - ((prevWoHs[i] - normWoH) * 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
    						
    						
					        });
			                
			                //dgk
						    kwicks.eq(o.defaultKwick).addClass('active');
						    if((o.defaultKwick==0)|(o.defaultKwick==(kwicks.size()-1)))
						    {
						        kwicks.eq(o.defaultKwick).children('a').addClass('active');
						    }
						    kwicks.eq(o.defaultKwick).trigger('mouseover'); //DGK sticky fix
			            });
			        }
			        else
			        {
			        
			              kwicks.eq(i).bind("mouseleave",function()
			              {
			               //DGK animation if the leave event is on the first or last node
			                    var prevWoHs = [];
					            var prevLoTs = [];
			                      kwicks.eq(0).children('a').removeClass('active'); 
			                      kwicks.eq(kwicks.size()-1).children('a').removeClass('active'); 
			                      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;
							        for(i = 1; i < kwicks.size(); i++) {
								        kwicks.eq(i).css(WoH, prevWoHs[i] - ((prevWoHs[i] - normWoH) * 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
        						
        						
					            });

						       //dgk
						        kwicks.eq(o.defaultKwick).addClass('active');
    						     
						        if((o.defaultKwick==0)|(o.defaultKwick==(kwicks.size()-1)))
						        {
    						         kwicks.eq(o.defaultKwick).children('a').addClass('active');
						            
						        }
						        kwicks.eq(o.defaultKwick).trigger('mouseover'); //DGK sticky fix
				          });
				         
			        }
			        
			    }
			    kwicks.eq(0).bind("mouseover",function()
			    {
			        kwicks.eq(0).children('a').addClass('active');
			    });
			    
			    kwicks.eq(kwicks.size()-1).bind("mouseover",function()
			    {
			        kwicks.eq(kwicks.size()-1).children('a').addClass('active');
			    });
			    
			    
			}
		});
	};
	
})(jQuery);