/*

 * 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

 */

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();	

		}

	});





	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);

		$input.val($(li).html());

		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', $(this).val());

			li.innerHTML = $(this).html();

			if ($(this).is(':selected')) {

				$input.val($(this).html());

				$(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();
				document.location.href = "index.php?ln="+this.id;
				hideMe();

			});

		});

		return ul;

	}

	

};