/*
 * jQuery selectbox plugin
 *
 * Copyright (c) 2007 Sadri Sahraoui (brainfault.com)
 * Licensed under the GPL license:
 *   http://www.gnu.org/licenses/gpl.html
 *
 * The code is inspired from Autocomplete plugin (http://www.dyve.net/jquery/?autocomplete)
 *
 * Revision: $Id$
 * Version: 0.3
 */
jQuery.fn.extend({
	selectbox: function(options) {
		return this.each(function() {
			new jQuery.SelectBox(this, options);
		});
	}
});

var ListJqueryBox = "";

jQuery.SelectBox = function(selectobj, options) {

	var opt = options || {};
	opt.inputClass = opt.inputClass || "selectbox";
	opt.containerClass = opt.containerClass || "selectbox-wrapper";
	opt.hoverClass = opt.hoverClass || "selected";
	opt.debug = opt.debug || false;
	opt.onChange = opt.onChange || false;

  if(ListJqueryBox!='') ListJqueryBox += ", ";
  ListJqueryBox += "."+opt.containerClass;

	var elm_id = selectobj.id;
	var active = -1;
	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);
	$("body").append($container);

	init();

	$input
	.click(function(){
    $(ListJqueryBox).not($container).hide();
  	if( $container.is(':hidden') ) $container.show();
  	else $container.hide();
	  SetOffset();
	})
	.keydown(function(event) {
		switch(event.keyCode) {
			case 38: // up
				event.preventDefault();
				moveSelect(-1);
				break;
			case 40: // down
				event.preventDefault();
				moveSelect(1);
				break;
			//case 9:  // tab
			case 13: // return
				event.preventDefault(); // seems not working in mac !
				setCurrent();
				hideMe();
				break;
		}
		SetOffset();
	})
	.blur(function() {
		if ($container.is(':visible') ) {
			if(opt.debug) alert('container visible and has focus')
		} else {
      hideMe();
		}
		SetOffset();
	});


  function SetOffset(){
    var height = $input.height();
		var offset = $input.offset();
		$container.css({top: offset.top+height+10, left: offset.left});
	}

	function hideMe() {
		hasfocus = 0;
		$container.hide();
		SetOffset();
	}

	function init() {
		$container.append(getSelectOptions()).hide();
		var width = $input.width();
		$container.width(width);
		SetOffset();
  }

	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.hoverClass, $container).get(0);
		var text = $(li).text();
		$input.val( text );
		$select.val( text );
		if( opt.onChange ) eval( opt.onChange+'()' );
		return true;
	}

	// select value
	function getCurrentSelected() {
		return $select.val();
	}

	// input value
	function getCurrentValue() {
		return $input.val();
	}

	function getSelectOptions() {
		var select_options = new Array();
		var ul = document.createElement('ul');
		$select.children('option').each(function() {
			var li = document.createElement('li');
			li.setAttribute('id', $container.attr('id')+"_"+$(this).val() );
			li.innerHTML = $(this).html();
			if ( $(this).is(':selected') ) {
				$input.val( $(this).html() );
				$(li).addClass(opt.hoverClass);
			}
			ul.appendChild(li);
			$(li)
			.mouseover(function(event) {
				hasfocus = 1;
				if (opt.debug) alert('out on : '+this.id);
				jQuery(event.target, $container).addClass(opt.hoverClass);
			})
			.mouseout(function(event) {
				hasfocus = -1;
				if (opt.debug) alert('out on : '+this.id);
				jQuery(event.target, $container).removeClass(opt.hoverClass);
			})
			.click(function(event) {
				if (opt.debug) alert('click on :'+this.id);
				$(this).parent().find('li').removeClass(opt.hoverClass);
				$(this).addClass(opt.hoverClass);
				if( $(this).text()=='' ) alert("vide");
				setCurrent();
        hideMe();
			});
		});
		return ul;
	}

};