/*
 * 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();     
              }*/

        .blur(function () {

            if ($container.is(':visible') && hasfocus > 0) {

                if (opt.debug) console.log('container visible and has focus')

            } else {

                if ((jQuery.browser.msie && jQuery.browser.version.substr(0, 1) < 8) || jQuery.browser.safari) {

                    if (document.activeElement.getAttribute('id').indexOf('_container') == -1) {

                        hideMe();

                    } else {

                        $input.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', parentid + '_' + $(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();
                           hideMe();
                     });
              });
              return ul;
       }
       
};