var UPLOAD = 'upload';
var UPLOAD_COMPLETED = 'uploadCompleted';
var UPLOAD_EDIT = 'uploadEdit';
var UPLOAD_MESSAGE = 'uploadMessage';
var UPLOAD_VIEW_CONTAINER = 'uploadViewContainer';
var UPLOAD_BUSY = 'uploadBusy';
var UPLOAD_FRAME = 'uploadFrame';
var UPLOAD_ALERT_MESSAGE = 'uploadAlertMessage';
var UPLOAD_FILE = 'uploadFile';
var UPLOAD_VIEW = 'uploadView';
var UPLOAD_REMOTE_SCRIPTING = 'uploadRemoteScripting';
var UPLOAD_GET_PROGRESS = 'getProgress';
var UPLOAD_PROGRESS_BAR = 'uploadProgressBar';
var UPLOAD_MANAGER = 'uploadManager';
var UPLOAD_CHECK = 'uploadCheck';
var UPLOAD_MESSAGE_CONTAINER = 'uploadMessageContainer';
var UPLOAD_ACTIONS_CONTAINER = 'uploadActionsContainer';
var UPLOAD_DEFAULT_KEY = 'default';

function UploadManager()
{
	var uploadManager =
	{
  		add :
			function( name )
			{
				//this method adds another upload to the manager to be uploaded later
				this.uploads.put( name, new Upload() );
				
				if ( !this.onsubmit )
				{
					//only modify the submit once
					this.onsubmit = true;
					this.oldSubmit = document.forms[0].onsubmit;
					//change the submit of the form to first upload all the files
					document.forms[0].onsubmit = function()
					{
						uploadManager.oldSubmit();
						uploadManager.upload();
						return false;
					}
				}
			},
		complete :
			function( name )
			{
				//this method is called when an upload is complete
				this.uploads[ name ].complete = true;
				var next = this.getNext();
				var errors = this.hasErrors();
				
				if ( !next && !errors )
				{
					//uploaded all files with no errors, submit the form
					//note - do not call submitForm(...) here because then
					//the onsubmit actions will be run again
					document.forms[0].submit();
				}
				else if ( next )
				{
					//else move on to the next upload
					this.upload( next );
				}
			},
		upload :
			function( name )
			{
				if ( !name )
				{
					name = this.getNext();
				}
				
				//this method actually uploads a file
				//by calling uploadFile(...) in the frame of the upload control
				if ( name )
				{
					frames[getUnique( UPLOAD_FRAME, name )].uploadFile( name );
				}
			},
		getNext :
			function()
			{
				var upload;
				var keys = this.uploads.getKeys();				
				
				for ( var i = 0; i < keys.length; i++ )
				{
					upload = this.uploads.get( keys[i] );
					if ( !upload.complete && !upload.error )
					{
						return keys[i];
					}
				}
			},
  		error :
			function( name )
			{
				//this method is called when an upload errors
				this.uploads.get( name ).error = true;
				
				var next = this.getNext();
				
				if ( next )
				{
					//upload the next file
					this.upload( next );
				}
			},			
		cancel :
			function()
			{
				if ( this.onsubmit )
				{
					//change the submit of the form back to what it was
					document.forms[0].onsubmit = function()
					{
						uploadManager.oldSubmit();
					}					
				}
			},
		hasErrors :
			function()
			{
				var keys = this.uploads.getKeys();				
				
				for ( var i = 0; i < keys.length; i++ )
				{
					if ( this.uploads.get( keys[i] ).error )
					{
						return true;
					}
				}
				
				return false;	
			}
	}
		
	uploadManager.uploads = new HashMap();
	
	return uploadManager;
}

var uploadManager = new UploadManager();

function Upload()
{
	var upload =
	{		
	}
	
	return upload;
}

function findUploadManager( count )
{
	//find the upload manager in this frame or a parent frame
	var foundUploadManager = uploadManager;
	
	if ( !foundUploadManager && count != 5 && parent )
	{
		//keep going up until you don't have a parent or you've gone up five times
		foundUploadManager = parent.findUploadManager( ++count );
	}
	
	return foundUploadManager;
}

function uploadOnLoad( uniqueIdentifier, showControls )
{
	if ( showControls )
	{
		//hide the upload control
		$( '#' + getUnique( UPLOAD_FILE, uniqueIdentifier ) ).hide( 0 );
		
		//show the add/replace action link
		$( '#' + getUnique( UPLOAD_ACTIONS_CONTAINER, uniqueIdentifier ) ).show( 0 );		
		$( '#' + getUnique( UPLOAD_EDIT, uniqueIdentifier ) ).show( 0 );
	}
	else		
	{
		//resize the frame because we are showing it
		setIFrameHeight( getUnique( UPLOAD_FRAME, uniqueIdentifier ) );		
	}

    //set busy indicator off (this is turned on when uploading)
    $( '#' + getUnique( UPLOAD_BUSY, uniqueIdentifier ) ).hide( 500 );	
}

function complete( uniqueIdentifier, repositoryFileId, viewURL, edit  )
{
	//show the view action link
	$( '#' + getUnique( UPLOAD_VIEW_CONTAINER, uniqueIdentifier ) ).show( 0 );
	
	//get the upload hidden field that stored the repositoryFileId
	var upload = get( getUnique( UPLOAD, uniqueIdentifier ) );
	
	if ( upload )
	{
		//if we have one, then set the repositoryFileId
		upload.value = repositoryFileId;				
	}
	
	if ( viewURL )
	{
		//change the view URL to the new file
		get( getUnique( UPLOAD_VIEW, uniqueIdentifier ) ).href = viewURL;
	}
    
    if ( edit )
    {
    	//we have an edit string (this changes "Add" to "Replace", for instance)
    	showMessage( get( getUnique( UPLOAD_EDIT, uniqueIdentifier ) ), edit );
    }
    
    //show success check
    $( '#' + getUnique( UPLOAD_CHECK, uniqueIdentifier ) ).show( 0 );
    
    //set busy indicator off (this is turned on when uploading)
    $( '#' + getUnique( UPLOAD_BUSY, uniqueIdentifier ) ).hide( 500 );    
}

function showMessages( uniqueIdentifier, message, alertMessage )
{	
	$( '#' + getUnique( UPLOAD_MESSAGE_CONTAINER, uniqueIdentifier ) ).show( 0 );
	
    if ( message )
    {    	    	
    	//show the message
	    $( '#' + getUnique( UPLOAD_MESSAGE, uniqueIdentifier ) ).show( 0 );
	    showMessage( get( getUnique( UPLOAD_MESSAGE, uniqueIdentifier ) ), message );
    }
    else
    {
    	//hide it
    	$( '#' + getUnique( UPLOAD_MESSAGE, uniqueIdentifier ) ).hide( 0 );
    }	
	
    if ( alertMessage )
    {    	    	
    	//show the alert message
    	$( '#' + getUnique( UPLOAD_ALERT_MESSAGE, uniqueIdentifier ) ).show( 0 );
	    showMessage( get( getUnique( UPLOAD_ALERT_MESSAGE, uniqueIdentifier ) ), alertMessage );
    }
    else
    {
    	//hide it
    	$( '#' + getUnique( UPLOAD_ALERT_MESSAGE, uniqueIdentifier ) ).hide( 0 );
    }	
}

function editUpload( uniqueIdentifier )
{
	//hide the action links
	$( '#' + getUnique( UPLOAD_ACTIONS_CONTAINER, uniqueIdentifier ) ).hide( 0 );
	
	//hide any current messages
	$( '#' + getUnique( UPLOAD_MESSAGE_CONTAINER, uniqueIdentifier ) ).hide( 0 );
	$( '#' + getUnique( UPLOAD_MESSAGE, uniqueIdentifier ) ).hide( 0 );
	
	//show the file control
	$( '#' + getUnique( UPLOAD_FILE, uniqueIdentifier ) ).show( 0 );
	
	//hide the upload progress bar
	$( '#' + getUnique( UPLOAD_PROGRESS_BAR, uniqueIdentifier ) ).hide( 500 );	
	
	//resize the frame because we are showing it
	setIFrameHeight( getUnique( UPLOAD_FRAME, uniqueIdentifier ) );	
}

function removeUpload( uniqueIdentifier )
{
	// blank out value
	$( '#' + getUnique( UPLOAD, uniqueIdentifier ) ).val( '' )

	//hide the action links
	$( '#' + getUnique( UPLOAD_ACTIONS_CONTAINER, uniqueIdentifier ) ).hide( 0 );
	
	//hide any current messages
	$( '#' + getUnique( UPLOAD_MESSAGE_CONTAINER, uniqueIdentifier ) ).hide( 0 );
	$( '#' + getUnique( UPLOAD_MESSAGE, uniqueIdentifier ) ).hide( 0 );
	
	//show the file control
	$( '#' + getUnique( UPLOAD_FILE, uniqueIdentifier ) ).show( 0 );
	
	//hide the upload progress bar
	$( '#' + getUnique( UPLOAD_PROGRESS_BAR, uniqueIdentifier ) ).hide( 500 );	
	
	//resize the frame because we are showing it
	setIFrameHeight( getUnique( UPLOAD_FRAME, uniqueIdentifier ) );	
}

function checkUploadProgress( uniqueIdentifier, start )
{
	if ( start )
	{
		//we are starting the progress indicator, so show it
		$( '#' + getUnique( UPLOAD_PROGRESS_BAR, uniqueIdentifier ) ).progressbar({ value: 0 });
		$( '#' + getUnique( UPLOAD_PROGRESS_BAR, uniqueIdentifier ) ).show( 500 );
	}
	
	//get the progress for this upload
	var parameters = '';
	
	if ( uniqueIdentifier )
	{
		parameters = Array( uniqueIdentifier );
	}
	
	jsrsExecute( value( UPLOAD_REMOTE_SCRIPTING ), getUploadProgress, UPLOAD_GET_PROGRESS, parameters );
}

function getUploadProgress( results )
{
	var uploadInfo = getItems( results );		
	var progress = parseInt( uploadInfo[0] );	
	var uniqueIdentifier = uploadInfo[1];
	var error = uploadInfo[3];	
	var instant = false;
	
	if ( uploadInfo[2] === 'true' )
	{
		instant = true;
	}			
	
	if ( error )
	{
		$( '#' + getUnique( UPLOAD_PROGRESS_BAR, uniqueIdentifier ) ).hide( 500 );		
		
		if ( !instant )
		{
			uploadManager.error( uniqueIdentifier );
			//reset the buttons so the user can save again, since the form did not submit because of the error
			resetButtons();
		}
	}
	else
	{
		if ( progress != 0 ) 
		{
			//update the progress bar if it's not 0
			//set the percentage of the progress in the bar
			$( '#' + getUnique( UPLOAD_PROGRESS_BAR, uniqueIdentifier ) ).progressbar( 'option', 'value', progress );
		}	
			
		if ( progress != 100 )
		{			
			//keep updating the progress until we are at 100%
			setTimeout( 'checkUploadProgress( \'' + uniqueIdentifier + '\' );', 1000 );
		}
		else if ( !instant )
		{
			//at 100% so finishing this upload AND
			//not an instant upload, so use the uploadManager
			uploadManager.complete( uniqueIdentifier );
		}
	}
}

function uploadFile( uniqueIdentifier )
{
	//show that the upload is busy 
	$( '#' + getUnique( UPLOAD_BUSY, uniqueIdentifier ) ).show( 500 );
	
	//hide any messages
	$( '#' + getUnique( UPLOAD_MESSAGE, uniqueIdentifier ) ).hide( 500 );
	
	//resize the frame because hiding the messages will resize the frame
	setIFrameHeight( getUnique( UPLOAD_FRAME, uniqueIdentifier ) );
		
	//start the progress indicator
	checkUploadProgress( uniqueIdentifier, true );
}

this.uploadManagerReady = true;