/**
 * Convert a single file-input element into a 'multiple' input list
 *
 * Usage:
 *
 *   1. Create a file input element (no name)
 *      eg. <input type="file" id="first_file_element">
 *
 *   2. Create a DIV for the output to be written to
 *      eg. <div id="files_list"></div>
 *
 *   3. Instantiate a MultiSelector object, passing in the DIV and an (optional) maximum number of files
 *      eg. var multi_selector = new MultiSelector( document.getElementById( 'files_list' ), 3 );
 *
 *   4. Add the first element
 *      eg. multi_selector.addElement( document.getElementById( 'first_file_element' ) );
 *
 *   5. That's it.
 *
 *   You might (will) want to play around with the addListRow() method to make the output prettier.
 *
 *   You might also want to change the line 
 *       element.name = 'file_' + this.count;
 *   ...to a naming convention that makes more sense to you.
 * 
 * Licence:
 *   Use this however/wherever you like, just don't blame me if it breaks anything.
 *
 * 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 ,count,title_div){
	// Where to write the list
	this.list_target = list_target;
	// How many elements?
	if(count > 0){
			this.count = count;
	}else{
		this.count = 0;
	}
	// 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,element_1){
		// Make sure it's a file input element
		if(element.tagName == 'INPUT'){ // && element.type == 'file'
			// Element name -- what number am I?
			var new_id = this.id-1;
			element.name = 'data[Image][name' + this.id++ + ']';			
			//var new_id = this.id-1;
			element_1.name = 'data[VacationhomesClient][title' + new_id ++ + ']';			
			//alert(element_1.name +' :  '+ this.id + ' new id : '+new_id+' Name : '+element.name);
			// Add reference to this object
			element.multi_selector = this;
			element_1.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';
				
				var new_element_1 = document.createElement('input');
				new_element_1.type = 'hidden';
				new_element_1.id = 'VacationhomesClientTitle'+new_id;				
				// insert title value to [title1] 
				new_element_1.value = document.getElementById('VacationhomesClientTitle1').value;
				document.getElementById('VacationhomesClientTitle1').value = '';
				// Add new element
				this.parentNode.insertBefore(new_element, this);
				this.parentNode.insertBefore(new_element_1, this);	
				//Apply 'update' to element
				this.multi_selector.addElement(new_element,new_element_1);
				// Update list
				this.multi_selector.addListRow(this,new_element_1);
				// Hide this: we can't use display:none because Safari doesn't like it
				this.style.position = 'absolute';
				this.style.left = '-1000px';
			};
			// If we've reached maximum number, disable input element
			//if( this.max != -1 && this.count >= this.max )
			if(this.max != -1 && this.count >= this.max)
			{				
				element.disabled = true;
				element_1.disabled = true;
			}else{
				element_1.disabled = false;
			}
			// File element counter 
			this.count++;
			// Most recent element
			this.current_element = element;
			this.current_element_1 = element_1;
		} 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,element_1){
		// 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.value = 'Delete';

		// References
		new_row.element = element;
		// Delete function
		new_row_button.onclick= function()
		{
			// Remove element from form
			this.parentNode.element.parentNode.removeChild(this.parentNode.element);
			// this.parentNode.element.parentNode.removeChild(this.parentNode.element_1);			
			// blank title textbox value 
			element_1.value = '';
			// 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.disabled = false;
			
			// 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 = element.value;
		// Add button
		new_row.appendChild(new_row_button);
		// Add it to the list
		this.list_target.appendChild(new_row);	
	};
	this.decreaseCount = function(){
		// Remove element from form
		this.count = this.count-1;
		this.current_element.disabled = false;
		//return false;
	};
};