/*
 * 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;
	}

};