/*

 * 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) {

		var zindex = 100;

		return this.each(function() {

			new jQuery.SelectBox(this, options, zindex);

			zindex--;

		});

	}

});





/* pawel maziarz: work around for ie logging */

if (!window.console) {

	var console = {

		log: function(msg) {

	 }

	}

}

/* */



jQuery.SelectBox = function(selectobj, options, zindex) {



	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;

	opt.defaultwidth = opt.defaultwidth || 200;



	var elm_id = selectobj.id;

	var active = -1;

	var inFocus = false;

	var hasfocus = 0;

	//jquery object for select element

	var $select = jQuery(selectobj);

	// jquery container object

	var $container = setupContainer(opt);

	//jquery input object

	var $input = setupInput(opt);

	// hide select and append newly created elements

	var $input_container = jQuery(document.createElement("div"));

	$input_container.attr('class','selectbox_element');

	$input_container.append($input);

	$select.wrap('<div class="select_wrapper" style="z-index:'+zindex+'"></div>');

	$select.hide().before($input_container).before($container);



	init();



	var fn = $select.attr('onchange');



	$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 !

				jQuery('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() {

		var $ul = getSelectOptions($input.attr('id'));

		$container.append($ul).hide();

		if (jQuery($ul).css('width') > opt.defaultwidth) {
			var width = jQuery($ul).css('width');

		} else {
			var width = opt.defaultwidth;

		}

		$container.width(width);

    }



	function setupContainer(options) {

		var container = document.createElement("div");

		$container = jQuery(container);

		$container.attr('id', elm_id+'_container');

		$container.addClass(options.containerClass);

		return $container;

	}



	function setupInput(options) {

		var input = document.createElement("input");

		var $input = jQuery(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

		var div = document.createElement("div");

		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);



		jQuery(lis[active]).addClass(opt.hoverClass);

	}



	function setCurrent() {

		var li = jQuery("li."+opt.currentClass, $container).get(0);

		var ar = (''+li.id).split('_input_');

		var el = ar[ar.length-1];

		$select.val(el);

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

		$input.attr('class', opt.inputClass+' '+jQuery(li).attr('class'));

		$input.css('background-image', jQuery(li).css('background-image'));

		fn ? fn() : '';

		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');

		jQuery(ul).addClass(jQuery($select).attr('class'));

		$select.children('option').each(function() {

			var li = document.createElement('li');

			li.setAttribute('id', parentid + '_' + jQuery(this).val());

			li.style.backgroundImage = jQuery(this).css('background-image');

			jQuery(li).addClass(jQuery(this).attr('class'));

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

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

				jQuery(li).addClass(opt.currentClass);

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

				$input.attr('class', opt.inputClass+' '+jQuery(li).attr('class'));

				$input.css('background-image', li.style.backgroundImage);

			}

			ul.appendChild(li);

			jQuery(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 = jQuery('li.'+opt.hoverClass, $container).get(0);

				if (opt.debug) console.log('click on :'+this.id);

				jQuery('li.'+opt.currentClass).removeClass(opt.currentClass);

				jQuery(this).addClass(opt.currentClass);

				setCurrent();

				hideMe();

			});

		});

		return ul;

	}



};