/**
 * Convert a single file-input element into a 'multiple' input list
 *
 * Credit:
 *   If you're nice, you'll leave this bit:
 *
 *   Class by Stickman -- http://www.the-stickman.com
 *      with thanks to:
 *      [for Safari fixes]
 *         Luis Torrefranca -- http://www.law.pitt.edu
 *         and
 *         Shawn Parker & John Pennypacker -- http://www.fuzzycoconut.com
 *      [for duplicate name bug]
 *         'neal'
 */


function MultiSelector( list_target, max, file_id, attributs, edit , i18n){

  // Where to write the list
  this.list_target = list_target;
  // How many elements?
  this.count = 0;
  this.file_id=file_id;
  this.attributs=attributs;
  this.edit=edit;
  this.i18n=i18n;
  // How many elements?
  this.id = 0;
  // Is there a maximum?
  if( max ){
    this.max = max;
  } else {
    this.max = -1;
  };

  /**
   * Add a new file input element
   */
  this.addElement = function( element ){

    // Make sure it's a file input element
    if( element.tagName == 'INPUT' && element.type == 'file' ){

      // Element name -- what number am I?
      element.name = this.file_id+'file_'+this.id++;

      // Add reference to this object
      element.multi_selector = this;

      // What to do when a file is selected
      element.onchange = function(){

        // New file input
        var new_element = document.createElement( 'input' );
        new_element.type = 'file';

        // Add new element
        this.parentNode.insertBefore( new_element, this );

        // Apply 'update' to element
        this.multi_selector.addElement( new_element );

        // Update list
        this.multi_selector.addListRow( this );

        // Hide this: we can't use display:none because Safari doesn't like it
        this.style.position = 'absolute';
        this.style.left = '-5000px';

      };
      // If we've reached maximum number, disable input element
      if( this.max != -1 && this.count >= this.max ){
        element.style.position = 'absolute';
        element.style.visibility = 'hidden';
      };

      // File element counter
      this.count++;
      // Most recent element
      this.current_element = element;
      for(key in this.attributs)
        this.current_element.setAttribute(key, attributs[key]);

    } else {
      // This can only be applied to file input elements!
      alert( 'Error: not a file input element' );
    };

  };

  /**
   * Add a new row to the list of files
   */
  this.addListRow = function( element ){

    // Activate Leave Message
    YAHOO.mzag.util.activateLeaveMessage();
    
    // Row div
    var new_row = document.createElement( 'div' );

    // Delete button
    var new_row_button = document.createElement( 'input' );
    new_row_button.type = 'button';
    new_row_button.className = 'mzag_gui_filemulti_delete';
    new_row_button.value = this.i18n['deleteText'];
    // Input for File Name
    var new_filename_input = document.createElement( 'input' );
    new_filename_input.type = 'text';
    new_filename_input.name = element.name+'_name';
    new_filename_input.className = 'mzag_gui_filemulti_name';
    new_filename_input.value = this.extractFileName(element.value);
    for(key in this.attributs)
      new_filename_input.setAttribute(key, attributs[key]);
    if(this.edit==0)
    {
      new_filename_input.readOnly='readonly';
      new_filename_input.style.background ='#DDD';
    }
    var new_tooltip = document.createElement( 'div' );

    var new_info_label = document.createElement( 'img' );
    new_info_label.src = '/mzag/gui/www/images/icons/infolabel.gif';
    new_info_label.alt = '';
    new_info_label.id  = this.file_id+this.id;

    /*new_info_label.onmousemove = function(e)
    {
      // position where mousemove fired
        var xPos = e? e.pageX : window.event.x;
        var yPos = e? e.pageY : window.event.y;

        // for ie add scroll position
        if (document.all && !document.captureEvents) {
            xPos += document[docEl].scrollLeft;
            yPos += document[docEl].scrollTop;
        }

      new_tooltip.style.display = "block";
      new_tooltip.style.left = (xPos + 15) + "px";
      new_tooltip.style.top   = (yPos) + "px";
    }

    new_info_label.onmouseout = function(){
      new_tooltip.style.display = "none";
    }*/

    // References
    new_row.element = element;

    // Delete function
    new_row_button.onclick= function(){

      // Remove element from form
      this.parentNode.element.parentNode.removeChild( this.parentNode.element );

      // Remove this row from the list
      this.parentNode.parentNode.removeChild( this.parentNode );

      // Decrement counter
      this.parentNode.element.multi_selector.count--;

      // Re-enable input element (if it's disabled)
      this.parentNode.element.multi_selector.current_element.style.position = 'relative';
      this.parentNode.element.multi_selector.current_element.style.visibility = 'visible';

      // Appease Safari
      //    without it Safari wants to reload the browser window
      //    which nixes your already queued uploads
      return false;
    };

    // Set row value
    //new_row.innerHTML = this.extractFileName(element.value);

    // Add button/input
    new_row.appendChild( new_filename_input );
    new_row.appendChild( new_row_button );
    new_row.appendChild( new_info_label );
    //new_row.appendChild ( new_tooltip );

    // Add it to the list
    this.list_target.appendChild( new_row );

    var tooltip=new YAHOO.widget.Tooltip(new_tooltip, {context:new_info_label.id,  text:element.value});

  };

  this.extractFileName = function(value){
    value = value.replace(/\\/g, '/');
    splitted = value.split("/");
    return splitted[splitted.length -1];
  }
};