/**
* Stylish Select 0.4.5 - jQuery plugin to replace a select drop down box with a stylable unordered list
* http://github.com/sko77sun/Stylish-Select
* 
* Requires: jQuery 1.3 or newer
* 
* Contributions from Justin Beasley: http://www.harvest.org/ Anatoly Ressin: http://www.artazor.lv/ Wilfred Hughes: https://github.com/Wilfred
* 
* Dual licensed under the MIT and GPL licenses.
*/
(function($)
{
	//add class to html tag
	$('html').addClass('stylish-select');

	//Cross-browser implementation of indexOf from MDN: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/indexOf
	if (!Array.prototype.indexOf)
	{
		Array.prototype.indexOf = function(searchElement /*, fromIndex */)
		{
			if (this === void 0 || this === null)
				throw new TypeError();

			var t = Object(this);
			var len = t.length >>> 0;
			if (len === 0)
				return -1;

			var n = 0;
			if (arguments.length > 0)
			{
				n = Number(arguments[1]);
				if (n !== n) // shortcut for verifying if it's NaN
					n = 0;
				else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0))
					n = (n > 0 || -1) * Math.floor(Math.abs(n));
			}

			if (n >= len)
				return -1;

			var k = n >= 0
			? n
			: Math.max(len - Math.abs(n), 0);

			for (; k < len; k++)
			{
				if (k in t && t[k] === searchElement)
					return k;
			}
			return -1;
		};
	}

	//utility methods
	$.fn.extend(
	{
		getSetSSValue: function(value)
		{
			if (value)
			{
				//set value and trigger change event
				$(this).val(value).change();
				return this;
			}
			else
			{
				return $(this).find(':selected').val();
			}
		},
		//added by Justin Beasley
		resetSS: function()
		{
			var oldOpts = $(this).data('ssOpts');
			$this = $(this);
			$this.next().remove();
			//unbind all events and redraw
			$this.unbind('.sSelect').sSelect(oldOpts);
		}
	});

	$.fn.sSelect = function(options)
	{
		return this.each(function()
		{
			var defaults = {
				defaultText:    'Please select',
				animationSpeed: 0, //set speed of dropdown
				ddMaxHeight:    '', //set css max-height value of dropdown
				containerClass: '' //additional classes for container div
			};

			//initial variables
			var opts = $.extend(defaults, options),
			$input = $(this),
			$containerDivText    = $('<div class="selectedTxt"></div>'),
			$containerDiv        = $('<div class="newListSelected ' + opts.containerClass + '"></div>'),
			$containerDivWrapper = $('<div class="SSContainerDivWrapper" style="visibility:hidden;"></div>'),
			$newUl               = $('<ul class="newList"></ul>'),
			itemIndex            = -1,
			currentIndex         = -1,
			prevIndex            = -1,
			keys                 = [],
			prevKey              = false,
			prevented            = false,
			$newLi;

			//added by Justin Beasley
			$(this).data('ssOpts',options);

			//build new list
			$containerDiv.insertAfter($input);
			$containerDiv.attr("tabindex", $input.attr("tabindex") || "0");
			$containerDivText.prependTo($containerDiv);
			$newUl.appendTo($containerDiv);
			$newUl.wrap($containerDivWrapper);
			$containerDivWrapper = $newUl.parent();
			$input.hide();

			//added by Justin Beasley (used for lists initialized while hidden)
			$containerDivText.data('ssReRender',!$containerDivText.is(':visible'));

			//test for optgroup
			if ($input.children('optgroup').length == 0)
			{
				$input.children().each(function(i)
				{
					var option = $(this).text();
					var key = $(this).val();

					//add first letter of each word to array
					keys.push(option.charAt(0).toLowerCase());
					if ($(this).attr('selected') == 'selected' || $(this).attr('selected') == true)
					{
						opts.defaultText = option;
						currentIndex = prevIndex = i;
					}
					$newUl.append($('<li><a href="JavaScript:void(0);">'+option+'</a></li>').data('key', key));

				});
				//cache list items object
				$newLi = $newUl.children().children();

			}
			else //optgroup
			{
				$input.children('optgroup').each(function()
				{
					var optionTitle = $(this).attr('label'),
					$optGroup = $('<li class="newListOptionTitle">'+optionTitle+'</li>'),
					$optGroupList = $('<ul></ul>');

					$optGroup.appendTo($newUl);
					$optGroupList.appendTo($optGroup);

					$(this).children().each(function()
					{
						++itemIndex;
						var option = $(this).text();
						var key = $(this).val();
						//add first letter of each word to array
						keys.push(option.charAt(0).toLowerCase());
						if ($(this).attr('selected') == 'selected' || $(this).attr('selected') == true)
						{
							opts.defaultText = option;
							currentIndex = prevIndex = itemIndex;
						}
						$optGroupList.append($('<li><a href="JavaScript:void(0);">'+option+'</a></li>').data('key',key));
					})
				});
				//cache list items object
				$newLi = $newUl.find('ul li a');
			}

			//get heights of new elements for use later
			var newUlHeight = $newUl.height(),
			containerHeight = $containerDiv.height(),
			newLiLength     = $newLi.length;


			//check if a value is selected
			if (currentIndex != -1)
			{
				navigateList(currentIndex);
			}
			else
			{
				//set placeholder text
				$containerDivText.text(opts.defaultText);
			}

			//decide if to place the new list above or below the drop-down
			function newUlPos()
			{
				var containerPosY = $containerDiv.offset().top,
				docHeight         = $(window).height(),
				scrollTop         = $(window).scrollTop();

				//if height of list is greater then max height, set list height to max height value
				if (newUlHeight > parseInt(opts.ddMaxHeight))
				{
					newUlHeight = parseInt(opts.ddMaxHeight);
				}

				containerPosY = containerPosY-scrollTop;
				if (containerPosY+newUlHeight >= docHeight)
				{
					$newUl.css(
					{
						height: newUlHeight
					});
					$containerDivWrapper.css({
						top:    '-'+newUlHeight+'px',
						height: newUlHeight
					});
					$input.onTop = true;
				}
				else
				{
					$newUl.css(
					{
						height: newUlHeight
					});
					$containerDivWrapper.css(
					{
						top:     containerHeight+'px',
						height: newUlHeight
					});
					$input.onTop = false;
				}
			}

			//run function on page load
			newUlPos();

			//run function on browser window resize
			$(window).bind('resize.sSelect scroll.sSelect', newUlPos);

			//positioning
			function positionFix()
			{
				$containerDiv.css('position','relative');
			}

			function positionHideFix()
			{
				$containerDiv.css(
				{
					position: 'static'
				});
			}

			$containerDivText.bind('click.sSelect',function(event)
			{
				event.stopPropagation();

				//added by Justin Beasley
				if($(this).data('ssReRender'))
				{
					newUlHeight = $newUl.height('').height();
					$containerDivWrapper.height('');
					containerHeight = $containerDiv.height();
					$(this).data('ssReRender',false);
					newUlPos();
				}
				
				//hide all menus apart from this one
				$('.SSContainerDivWrapper')
				.not($(this).next())
				.hide()
				.parent()
				.css('position', 'static')
				.removeClass('newListSelFocus');
					
				//show/hide this menu
				$containerDivWrapper.toggle();
				positionFix();
				
				//scroll list to selected item
				if(currentIndex == -1) currentIndex = 0;
				$newLi.eq(currentIndex).focus();
			});

			function closeDropDown(fireChange, resetText)
			{
				if(fireChange == true)
				{
					prevIndex = currentIndex;
					$input.change();
				}
				
				if(resetText == true)
				{
					currentIndex = prevIndex;
					navigateList(currentIndex);
				}
				
				$containerDivWrapper.hide();
				positionHideFix();
			}

			$newLi.bind('click.sSelect',function(e)
			{
				var $clickedLi = $(e.target);

				//update counter
				currentIndex = $newLi.index($clickedLi);

				//remove all hilites, then add hilite to selected item
				prevented = true;
				navigateList(currentIndex, true);
				closeDropDown();
			});

			$newLi.bind('mouseenter.sSelect',
				function(e)
				{
					var $hoveredLi = $(e.target);
					$hoveredLi.addClass('newListHover');
				}
				).bind('mouseleave.sSelect',
				function(e)
				{
					var $hoveredLi = $(e.target);
					$hoveredLi.removeClass('newListHover');
				}
				);

			function navigateList(currentIndex, fireChange)
			{
				if(currentIndex == -1)
				{
					$containerDivText.text(opts.defaultText);
					$newLi.removeClass('hiLite');
				}
				else
				{
					$newLi.removeClass('hiLite')
					.eq(currentIndex)
					.addClass('hiLite');

					var text = $newLi.eq(currentIndex).text(),
					val = $newLi.eq(currentIndex).parent().data('key');

					try
					{
						$input.val(val)
					}
					catch(ex)
					{
						// handle ie6 exception
						$input[0].selectedIndex = currentIndex;
					}

					$containerDivText.text(text);
				
					//only fire change event if specified
					if(fireChange == true)
					{
						prevIndex = currentIndex;
						$input.change();
					}
				
					if ($containerDivWrapper.is(':visible'))
					{
						$newLi.eq(currentIndex).focus();
					}
				}
			}

			$input.bind('change.sSelect',function(event)
			{
				var $targetInput = $(event.target);
				//stop change function from firing
				if (prevented == true)
				{
					prevented = false;
					return false;
				}
				var $currentOpt  = $targetInput.find(':selected');
				currentIndex = $targetInput.find('option').index($currentOpt);
				navigateList(currentIndex);
			});

			//handle up and down keys
			function keyPress(element)
			{
				//when keys are pressed
				$(element).unbind('keydown.sSelect').bind('keydown.sSelect',function(e)
				{
					var keycode = e.which;

					//prevent change function from firing
					prevented = true;

					switch(keycode)
					{
						case 40: //down
						case 39: //right
							incrementList();
							return false;
							break;
						case 38: //up
						case 37: //left
							decrementList();
							return false;
							break;
						case 33: //page up
						case 36: //home
							gotoFirst();
							return false;
							break;
						case 34: //page down
						case 35: //end
							gotoLast();
							return false;
							break;
						case 13: //enter
						case 27: //esc
							closeDropDown(true);
							return false;
							break;
					}

					//check for keyboard shortcuts
					keyPressed = String.fromCharCode(keycode).toLowerCase();

					var currentKeyIndex = keys.indexOf(keyPressed);

					if (typeof currentKeyIndex != 'undefined')
					{ //if key code found in array
						++currentIndex;
						currentIndex = keys.indexOf(keyPressed, currentIndex); //search array from current index

						if (currentIndex == -1 || currentIndex == null || prevKey != keyPressed)
						{
							// if no entry was found or new key pressed search from start of array
							currentIndex = keys.indexOf(keyPressed);
						}

						navigateList(currentIndex);
						//store last key pressed
						prevKey = keyPressed;
						return false;
					}
				});
			}

			function incrementList()
			{
				if (currentIndex < (newLiLength-1))
				{
					++currentIndex;
					navigateList(currentIndex);
				}
			}

			function decrementList()
			{
				if (currentIndex > 0)
				{
					--currentIndex;
					navigateList(currentIndex);
				}
			}

			function gotoFirst()
			{
				currentIndex = 0;
				navigateList(currentIndex);
			}

			function gotoLast()
			{
				currentIndex = newLiLength-1;
				navigateList(currentIndex);
			}

			$containerDiv.bind('click.sSelect',function(e)
			{
				e.stopPropagation();
				keyPress(this);
			});

			$containerDiv.bind('focus.sSelect',function()
			{
				$(this).addClass('newListSelFocus');
				keyPress(this);
			});

			$containerDiv.bind('blur.sSelect',function()
			{
				$(this).removeClass('newListSelFocus');
			});

			//hide list on blur
			$(document).bind('click.sSelect',function()
			{
				$containerDiv.removeClass('newListSelFocus');
				
				if ($containerDivWrapper.is(':visible'))
				{
					closeDropDown(false, true);
				}
				else
				{
					closeDropDown(false);
				}
			});

			//add classes on hover
			$containerDivText.bind('mouseenter.sSelect',
				function(e)
				{
					var $hoveredTxt = $(e.target);
					$hoveredTxt.parent().addClass('newListSelHover');
				}
				).bind('mouseleave.sSelect',
				function(e)
				{
					var $hoveredTxt = $(e.target);
					$hoveredTxt.parent().removeClass('newListSelHover');
				}
				);

			//reset left property and hide
			$containerDivWrapper.css(
			{
				left: '0',
				display: 'none',
				visibility: 'visible'
			});

		});

	};

})(jQuery);