/**
 * 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).html();
					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).html();
						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);