/**
* 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
*/
function MultiSelector( list_target, max ){

	// Where to write the list
	this.list_target = list_target;
	// How many elements?
	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 ){

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

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

			element.id = element.name;

			// 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 );

				// Hide this
				this.style.display = 'none';

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

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

			// File element counter
			this.count++;
			// Most recent element
			this.current_element = element;

		} 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 ){

		// Row div
		var tr = document.createElement( 'tr' );

		var td1  = document.createElement('td');
		var td2  = document.createElement('td');

		// Delete button
		var new_row_button = document.createElement( 'input' );
		new_row_button.type = 'button';
		new_row_button.value = 'Remover';

		// References
		this.element = element;

		// Delete function
		new_row_button.onclick= function(){
			// Remove element from form
			this.parentNode.parentNode.parentNode.removeChild( this.parentNode.parentNode );
			// Remove this row from the list
			//this.parentNode.parentNode.removeChild( this.parentNode );
			document.getElementById("dados_cliente").removeChild(document.getElementById(element.id));

			// Decrement counter
			multi_selector.count--;
			// Re-enable input element (if it's disabled)
			multi_selector.current_element.disabled = false;

		};

		// Set row value
		td1.innerHTML = element.value;

		// Add button
		//new_row.appendChild( new_row_button );

		//td1.appendChild(tr);
		td2.appendChild(new_row_button);

		tr.appendChild(td1);
		tr.appendChild(td2);

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


	};


};