/*
Stylish Select 0.4.1 - $ plugin to replace a select drop down box with a stylable unordered list
http://scottdarby.com/

Requires: jQuery 1.3 or newer

Contributions from Justin Beasley: http://www.harvest.org/ & Anatoly Ressin: http://www.artazor.lv/

Dual licensed under the MIT and GPL licenses.

*/
(function($){

	//add class of js to html tag
	$('html').addClass('stylish-select');

	//create cross-browser indexOf
	Array.prototype.indexOf = function (obj, start) {
		for (var i = (start || 0); i < this.length; i++) {
			if (this[i] == obj) {
				return i;
			}
		}
	}

	//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(options){
			var oldOpts = $(this).data('ssOpts');

            if (typeof(options) == undefined) {
                options = oldOpts;
            }

			$this = $(this);
			$this.next().remove();
			//unbind all events and redraw
			$this.unbind().sSelect(options);
			return this;
		}
	});

	$.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
			};

			//initial variables
			var opts = $.extend(defaults, options),
			$input = $(this),
			$containerDivText = $('<div class="selectedTxt"></div>'),
			$containerDiv = $('<div class="newListSelected" tabindex="0"></div>'),
			$newUl = $('<ul class="newList"></ul>'),
			itemIndex = -1,
			currentIndex = -1,
			keys = [],
			prevKey = false,
			prevented = false,
			$newLi;

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

			//build new list
			$html_class = $input.attr('class');

			if ($html_class != false) {
				$containerDiv.addClass($html_class);
			}

			$containerDiv.insertAfter($input);
			$containerDivText.prependTo($containerDiv);
			$newUl.appendTo($containerDiv);
			$input.hide();

			//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') != false){
						opts.defaultText = option;
						currentIndex = 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>');

					$optGroup.appendTo($newUl);

					var $optGroupList = $('<ul></ul>');

					$optGroupList.appendTo($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') != false){
							opts.defaultText = option;
							currentIndex = 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, true);
			} 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 = jQuery(window).height(),
				scrollTop = jQuery(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({
						top: '-'+newUlHeight+'px',
						height: newUlHeight
					});
					$input.onTop = true;
				} else {
					$newUl.css({
						top: containerHeight+'px',
						height: newUlHeight
					});
					$input.onTop = false;
				}
			}

			//run function on page load
			newUlPos();

			//run function on browser window resize
			$(window).resize(function(){
				newUlPos();
			});

			$(window).scroll(function(){
				newUlPos();
			});

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

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

			$containerDivText.click(function(event){

				event.stopPropagation();

				//hide all menus apart from this one
				$('.newList').not($(this).next()).hide().parent().removeClass('newListSelFocus');

				//show/hide this menu
				$newUl.toggle();
				positionFix();
				//scroll list to selected item
				$newLi.eq(currentIndex).focus();


			});

			$newLi.click(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);
				$newUl.hide();
				$containerDiv.css('position','static');//ie

			});

			$newLi.hover(
				function(e) {
					var $hoveredLi = $(e.target);
					$hoveredLi.addClass('newListHover');
				},
				function(e) {
					var $hoveredLi = $(e.target);
					$hoveredLi.removeClass('newListHover');
				}
				);

			function navigateList(currentIndex, init){
				$newLi.removeClass('hiLite')
				.eq(currentIndex)
				.addClass('hiLite');

				if ($newUl.is(':visible')){
					$newLi.eq(currentIndex).focus();
				}

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

				//page load
				if (init == true){
					$input.val(val);
					$containerDivText.text(text);
					return false;
				}

				$input.val(val)
				$input.change();
				$containerDivText.text(text);
			};

			$input.change(function(event){
				$targetInput = $(event.target);
				//stop change function from firing
				if (prevented == true){
					prevented = false;
					return false;
				}
				$currentOpt = $targetInput.find(':selected');

				//currentIndex = $targetInput.find('option').index($currentOpt);
				currentIndex = $targetInput.find('option').index($currentOpt);


				navigateList(currentIndex, true);
			}
			);

			//handle up and down keys
			function keyPress(element) {
				//when keys are pressed
				element.onkeydown = function(e){
					var keycode;
					if (e == null) { //ie
						keycode = event.keyCode;
					} else { //everything else
						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:
						case 27:
							$newUl.hide();
							positionHideFix();
							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) currentIndex = keys.indexOf(keyPressed); //if no entry was found or new key pressed search from start of array


						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.click(function(){
				keyPress(this);
			});

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

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

			//hide list on blur
			$('body').click(function(){
				$containerDiv.removeClass('newListSelFocus');
				$newUl.hide();
				positionHideFix();
			});

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

			//reset left property and hide
			$newUl.css('left','0').hide();

		});

	};

})(jQuery);