/*
 * jQuery selectbox plugin
 *
 * Copyright (c) 2007 Sadri Sahraoui (brainfault.com)
 * Licensed under the GPL license and MIT:
 *   http://www.opensource.org/licenses/GPL-license.php
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * The code is inspired from Autocomplete plugin (http://www.dyve.net/jquery/?autocomplete)
 *
 * Revision: $Id$
 * Version: 0.5
 * 
 * Changelog :
 *  Version 0.5 
 *  - separate css style for current selected element and hover element which solve the highlight issue 
 *  Version 0.4
 *  - Fix width when the select is in a hidden div   @Pawel Maziarz
 *  - Add a unique id for generated li to avoid conflict with other selects and empty values @Pawel Maziarz
 */
(function($) { 
	jQuery.fn.extend({
		selectbox: function(options) {
			return this.each(function() {
				new jQuery.SelectBox(this, options);
			});
		}
	});


	/* pawel maziarz: work around for ie logging */
	if (!window.console) {
		var console = {
			log: function(msg) { 
		 }
		}
	}
	/* */

	jQuery.SelectBox = function(selectobj, options) {
		
		var opt = options || {};
		opt.inputClass = opt.inputClass || "selectbox";
		opt.containerClass = opt.containerClass || "selectbox-wrapper";
		opt.hoverClass = opt.hoverClass || "current";
		opt.currentClass = opt.selectedClass || "selected"
		opt.debug = opt.debug || false;
		
		var elm_id = selectobj.id;
		var active = -1;
		var inFocus = false;
		var hasfocus = 0;
		//jquery object for select element
		var $select = $(selectobj);
		// jquery container object
		var $container = setupContainer(opt);
		//jquery input object 
		var $input = setupInput(opt);
		// hide select and append newly created elements
		$select.hide().before($input).before($container);
		
		
		init();
		
		$input
		.click(function(){
		if (!inFocus) {
			  $container.toggle();
			}
		})
		.focus(function(){
		   if ($container.not(':visible')) {
			   inFocus = true;
			   $container.show();
		   }
		})
		.keydown(function(event) {	   
			switch(event.keyCode) {
				case 38: // up
					event.preventDefault();
					moveSelect(-1);
					break;
				case 40: // down
					event.preventDefault();
					moveSelect(1);
					break;
				//case 9:  // tab 
				case 13: // return
					event.preventDefault(); // seems not working in mac !
					$('li.'+opt.hoverClass).trigger('click');
					break;
				case 27: //escape
				  hideMe();
				  break;
			}
		})
		.blur(function() {
			if ($container.is(':visible') && hasfocus > 0 ) {
				if(opt.debug) console.log('container visible and has focus')
			} else {
				hideMe();	
			}
		});

		$container
		.mouseover(function(event) {
			hasfocus = 1;
		})
		.mouseout(function(event) {
			hasfocus = -1;
		})
		.scroll(function() {
			$input.focus();
		});

		function hideMe() { 
			hasfocus = 0;
			$container.hide(); 
		}
		
		function init() {
			$container.append(getSelectOptions($input.attr('id'))).hide();
			var width = $input.css('width');
			$container.width(width);
		}
		
		function setupContainer(options) {
			var container = document.createElement("div");
			$container = $(container);
			$container.attr('id', elm_id+'_container');
			$container.addClass(options.containerClass);
			
			return $container;
		}
		
		function setupInput(options) {
			var input = document.createElement("input");
			var $input = $(input);
			$input.attr("id", elm_id+"_input");
			$input.attr("type", "text");
			$input.addClass(options.inputClass);
			$input.attr("autocomplete", "off");
			$input.attr("readonly", "readonly");
			$input.attr("tabIndex", $select.attr("tabindex")); // "I" capital is important for ie
			
			return $input;	
		}
		
		function moveSelect(step) {
			var lis = $("li", $container);
			if (!lis) return;

			active += step;

			if (active < 0) {
				active = 0;
			} else if (active >= lis.size()) {
				active = lis.size() - 1;
			}

			lis.removeClass(opt.hoverClass);

			$(lis[active]).addClass(opt.hoverClass);
		}
		
		function setCurrent() {	
			var li = $("li."+opt.currentClass, $container).get(0);
			var ar = (''+li.id).split('_');
			var el = ar[ar.length-1];
			$select.val(el);
			$select.change();
			$input.val($(li).html().replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>'));
			return true;
		}
		
		// select value
		function getCurrentSelected() {
			return $select.val();
		}
		
		// input value
		function getCurrentValue() {
			return $input.val();
		}
		
		function getSelectOptions(parentid) {
			var select_options = new Array();
			var ul = document.createElement('ul');
			$select.children('option').each(function() {
				var li = document.createElement('li');
				li.setAttribute('id', parentid + '_' + $(this).val());
				li.innerHTML = $(this).html();
				if ($(this).is(':selected')) {
					$input.val($(this).html().replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>'));
					$(li).addClass(opt.currentClass);
				}
				ul.appendChild(li);
				$(li)
				.mouseover(function(event) {
					//hasfocus = 1;
					if (opt.debug) console.log('over on : '+this.id);
					jQuery(event.target, $container).addClass(opt.hoverClass);
				})
				.mouseout(function(event) {
					//hasfocus = -1;
					if (opt.debug) console.log('out on : '+this.id);
					jQuery(event.target, $container).removeClass(opt.hoverClass);
				})
				.click(function(event) {
				  var fl = $('li.'+opt.hoverClass, $container).get(0);
					if (opt.debug) console.log('click on :'+this.id);
					$('li.'+opt.currentClass).removeClass(opt.currentClass); 
					$(this).addClass(opt.currentClass);
					setCurrent();
					hideMe();
				});
			});
			return ul;
		}
		
	};
})(jQuery);