/*
 * 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(); 
    }
  });


  function hideMe() { 
    hasfocus = 0;
    $container.hide(); 
  }
  
  function init() {
    $container.append(getSelectOptions($input.attr('id'))).hide();
    var paddingLeft = parseInt($input.css('padding-left').replace("px", ""));
    var paddingRight = parseInt($input.css('padding-right').replace("px", ""));
    var width = parseInt($input.css('width').replace("px", ""));
    $container.width(parseInt(width + paddingLeft + paddingRight) + "px");
    }
  
  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;
  }
  
};