/*
 * 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
 *	Usage
 *	    $(document).ready(function() {  
   	        $('#myselectbox').selectbox(  
              {  
                inputClass: 'selectbox', //css class for the input which will replace the select tag, display the background image  
                containerClass: 'selectbox-wrapper', // The list container class (a div element)  
                hoverClass: 'current', // css class for the current element  
                currentClass: 'selected', // css class for the selected element  
                debug: false // debug mode on/off
                onChange: function( name, value, element ) {}
              }  
           );  
       });  
 *	
 *
 *
 */
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;
	opt.onChange = options.onChange || null;

	
	if (selectobj.id)
		var elm_id = selectobj.id;
	else
		var elm_id = selectobj.name;
	
	var active = -1;
	var inFocus = false;
	var hasfocus = 0;

    var curValue = null;
	//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(opt.scrollBar){//load scroll Bar plugin
			$container.find('ul').jScrollPane({showArrows:true, scrollbarWidth: 16, arrowSize: 16, returnFocusTo: $input});
			
		}
        curValue = getCurrentSelected();
    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 !
				$('li.'+opt.hoverClass).trigger('click');
				break;
			case 27: //escape
			  hideMe();
			  break;
		}
	})
	.blur(function(event) {
            //$.each(event, function(k,v) {alert(k + ' ' + v)})
                if (jQuery.browser.msie) {
                    var w = $container.width();
                    var h = $container.height()
                    var offset  = $container.offset();

                    var mouseX = event.clientX + document.body.parentElement.scrollLeft;
                    var mouseY = event.clientY + document.body.parentElement.scrollTop;
                    //alert($container[0].className);
                    //alert("Mouse: " + mouseX + ',' + mouseY + " Offset:" + offset.left + ',' + offset.top);

                     if ( (mouseX >= offset.left && mouseX <= offset.left + w) &&
                         (mouseY >= offset.top && mouseY <= offset.top + h)      )
                    {
                         return;
                    }

                } // end if msie

		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");
		$input.attr("readonly", "readonly");
		console.log($input.val());
		$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);
		(opt.chainTitle) ? $input.val($(li).text() + ' ' + $(li).prevAll('li.title:first').text()) :  $input.val($(li).text());
		
		return true;
	}
	
	// select value
	function getCurrentSelected() {
		return $select.val();
	}
	
	// input value
	function getCurrentValue() {
		return $input.val();
	}
	
	function getSelectOptions(parentid) {
		var selectContainer = parentid.split('_');
		
		
		selectContainer = '#' + selectContainer[0] + '_container';
		
		var select_options = new Array();
		var ul = document.createElement('ul');
		$select.children('option').each(function() {
			var titleLi	= false;
			var li = document.createElement('li');
			li.setAttribute('id', parentid + '_' + $(this).val());
			if($(this).hasClass('title')){
				$(li).addClass( $(this).attr('class'));
				titleLi = true;
				
			}
			li.innerHTML = $(this).html();
			if ($(this).is(':selected')) {
				(opt.chainTitle) ? $input.val($(this).text() + ' ' + $(this).prevAll('option.title:first').text()) :  $input.val($(this).text());
				$(li).addClass(opt.currentClass);
			}
			ul.appendChild(li);
			if(titleLi == false){
				$(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 = $(selectContainer + 'li.'+opt.hoverClass, $container).get(0);
					if (opt.debug) console.log('click on :'+this.id);
					$(selectContainer + ' li.' + opt.currentClass).removeClass(opt.currentClass); 
					$(this).addClass(opt.currentClass);
					setCurrent();
					hideMe();

                    if ( parseInt($(this).attr('id').split('_').slice(2,3)) !== curValue && opt.onChange) {
                    	
                        opt.onChange( getCurrentValue(), parseInt($(this).attr('id').split('_').slice(2,3)) , $input);
                    }
				});
			}
		});
		return ul;
	}
	
};