/* **********************
   Event Handlers
   These are my custom event handlers to make my
   web application behave the way I went when SWFUpload
   completes different tasks.  These aren't part of the SWFUpload
   package.  They are part of my application.  Without these none
   of the actions SWFUpload makes will show up in my application.
   ********************** */

var swfu_submit_ok = true;

function fileQueued(file) {
	try {
		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setStatus("Pending...");
		//progress.toggleCancel(true, this);

		update_swfu_counts(this);

	} catch (ex) {
		this.debug(ex);
	}

}

function fileQueueError(file, errorCode, message) {
	try {
		if (this.getStats().files_queued === 0) {
			this.queueEvent("queue_complete_handler", [this.customSettings.queue_upload_count]);
		}

		if (errorCode === SWFUpload.QUEUE_ERROR.QUEUE_LIMIT_EXCEEDED) {
			alert("You have attempted to queue too many files.\n" + (message === 0 ? "You have reached the upload limit." : "You may select " + (message > 1 ? "up to " + message + " files." : "one file.")));
			return;
		}

		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setError();
		progress.toggleCancel(false);

		switch (errorCode) {
		case SWFUpload.QUEUE_ERROR.FILE_EXCEEDS_SIZE_LIMIT:
			progress.setStatus("Upload Failed: File must be smaller than " + this.settings['file_size_limit']);
			this.debug("Error Code: File too big, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		case SWFUpload.QUEUE_ERROR.ZERO_BYTE_FILE:
			progress.setStatus("Upload Failed: Cannot upload Zero Byte files.");
			this.debug("Error Code: Zero byte file, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		case SWFUpload.QUEUE_ERROR.INVALID_FILETYPE:
			progress.setStatus("Upload Failed: Invalid File Type.");
			this.debug("Error Code: Invalid File Type, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		default:
			if (file !== null) {
				progress.setStatus("Upload Failed: Unhandled Error");
			}
			this.debug("Error Code: " + errorCode + ", File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		}
	} catch (ex) {
        this.debug(ex);
    }
}

function fileDialogComplete(numFilesSelected, numFilesQueued) {
	try {
		if (numFilesSelected > 0) {
			document.getElementById(this.customSettings.cancelButtonId).style.display = 'block';
			disable_swfu_submit_button();
			/* I want auto start the upload and I can do that here */
			this.startUpload();
		}
	} catch (ex)  {
        this.debug(ex);
	}
}

function uploadStart(file) {
	try {
		/* I don't want to do any file validation or anything,  I'll just update the UI and
		return true to indicate that the upload should start.
		It's important to update the UI here because in Linux no uploadProgress events are called. The best
		we can do is say we are uploading.
		 */
		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setStatus("Uploading...");
		document.getElementById(this.customSettings.cancelButtonId).style.display = 'block';

	}
	catch (ex) {}

	return true;
}

function uploadProgress(file, bytesLoaded, bytesTotal) {
	try {
		var percent = Math.ceil((bytesLoaded / bytesTotal) * 100);

		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setProgress(percent);
		progress.setStatus("Uploading...");
	} catch (ex) {
		this.debug(ex);
	}
}

function uploadSuccess(file, serverData) {
	//we were calling this through another function chain, so make sure
	//we can replicate the bindings
	if(typeof(this.debug) != 'function')
		this_swfu = swfu;
	else
		this_swfu = this;

	try {
		var progress = new FileProgress(file, this_swfu.customSettings.progressTarget);

		if (serverData == "Upload Complete") {
			progress.setComplete();
			progress.setStatus("File Uploaded!");
			if(swfu_small_uploaders)
				swfu.movieElement.setStyle('visibility','hidden');
			if(typeof(swfu_success_custom_function) == "function")
				swfu_success_custom_function(serverData);

			//progress.toggleCancel(false);
		} else {
			progress.setError();
			progress.setStatus('Upload Error: '+serverData);
			//progress.toggleCancel(false);
		}
	} catch (ex) {
		this_swfu.debug(ex);
	}
}

function uploadError(file, errorCode, message) {
	try {
		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setError();
		progress.toggleCancel(false);

		switch (errorCode) {
		case SWFUpload.UPLOAD_ERROR.HTTP_ERROR:
			progress.setStatus("Upload Error: " + message);
			this.debug("Error Code: HTTP Error, File name: " + file.name + ", Message: " + message);
			break;
		case SWFUpload.UPLOAD_ERROR.UPLOAD_FAILED:
			progress.setStatus("Upload Failed.");
			this.debug("Error Code: Upload Failed, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		case SWFUpload.UPLOAD_ERROR.IO_ERROR:
			progress.setStatus("Server (IO) Error");
			this.debug("Error Code: IO Error, File name: " + file.name + ", Message: " + message);
			break;
		case SWFUpload.UPLOAD_ERROR.SECURITY_ERROR:
			progress.setStatus("Security Error");
			this.debug("Error Code: Security Error, File name: " + file.name + ", Message: " + message);
			break;
		case SWFUpload.UPLOAD_ERROR.UPLOAD_LIMIT_EXCEEDED:
			progress.setStatus("Upload limit exceeded.");
			this.debug("Error Code: Upload Limit Exceeded, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		case SWFUpload.UPLOAD_ERROR.FILE_VALIDATION_FAILED:
			progress.setStatus("Failed Validation.  Upload skipped.");
			this.debug("Error Code: File Validation Failed, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		case SWFUpload.UPLOAD_ERROR.FILE_CANCELLED:
			// If there aren't any files left (they were all cancelled) disable the cancel button
			if (this.getStats().files_queued === 0) {
				document.getElementById(this.customSettings.cancelButtonId).style.display = 'none';
			}
			progress.setStatus("Cancelled");
			progress.setCancelled();
			break;
		case SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED:
			progress.setStatus("Stopped");
			break;
		default:
			progress.setStatus("Unhandled Error: " + errorCode);
			this.debug("Error Code: " + errorCode + ", File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
			break;
		}
	} catch (ex) {
        this.debug(ex);
    }
}

function uploadComplete(file) {
	update_swfu_counts(this);
}

// This event comes from the Queue Plugin
function queueComplete(numFilesUploaded) {
	document.getElementById(this.customSettings.cancelButtonId).style.display = 'block';
	enable_swfu_submit_button();

	if (this.getStats().files_queued === 0) {
		document.getElementById(this.customSettings.cancelButtonId).style.display = 'none';
	}

	update_swfu_counts(this);
}

function update_swfu_counts(t){
	var numQueued = t.getStats().files_queued;
	var numCompleted = t.customSettings.queue_upload_count;

	var queued = '';
	var completed = '';

	var arr = new Array();
	if (numQueued) {
		arr.push(numQueued + " file" + (numQueued === 1 ? "" : "s") + " pending");
	}

	if (numCompleted) {
		arr.push(numCompleted + " file" + (numCompleted === 1 ? "" : "s") + " uploaded");
	}

	if(numQueued == 0 && !swfu_small_uploaders) {
		arr.push('Please click the "Upload Complete" button at the <a href="#swfu_upload_submit_button">bottom of the page</a>');
	}

	$('queuestatustop').innerHTML = arr.join(' - ');
	$('queuestatusbottom').innerHTML = arr.join(' - ');

	if((numCompleted + numQueued) > 4){
		$('queuestatusbottom').style.display = 'block';
	}


}

function enable_swfu_submit_button(){
	swfu_submit_ok = true;
}

function disable_swfu_submit_button(){
	swfu_submit_ok = false;
}


function swfu_upload_submit_button_clicked(e){
	if(!swfu_submit_ok){
		alert('Sorry, one or more files are still being processed');
		new Event(e).stop();
	}
}

/*
	A simple class for displaying file information and progress
	Note: This is a demonstration only and not part of SWFUpload.
	Note: Some have had problems adapting this class in IE7. It may not be suitable for your application.
*/

// Constructor
// file is a SWFUpload file object
// targetID is the HTML element id attribute that the FileProgress HTML structure will be added to.
// Instantiating a new FileProgress object with an existing file will reuse/update the existing DOM elements
function FileProgress(file, targetID) {
	this.fileProgressID = file.id;

	this.opacity = 100;
	this.height = 0;

	this.fileProgressWrapper = document.getElementById(this.fileProgressID);
	if (!this.fileProgressWrapper) {
		this.fileProgressWrapper = document.createElement("div");
		this.fileProgressWrapper.className = "progressWrapper";
		this.fileProgressWrapper.id = this.fileProgressID;

		this.fileProgressElement = document.createElement("div");
		this.fileProgressElement.className = "progressContainer";

		var progressCancel = document.createElement("a");
		progressCancel.className = "progressCancel";
		progressCancel.href = "#";
		progressCancel.style.visibility = "hidden";
		progressCancel.appendChild(document.createTextNode(" "));

		var progressText = document.createElement("div");
		progressText.className = "progressName";
		progressText.appendChild(document.createTextNode(file.name));

		var progressBar = document.createElement("div");
		progressBar.className = "progressBarInProgress";

		var progressStatus = document.createElement("div");
		progressStatus.className = "progressBarStatus";
		progressStatus.innerHTML = "&nbsp;";

		//this.fileProgressElement.appendChild(progressCancel);
		this.fileProgressElement.appendChild(progressText);
		this.fileProgressElement.appendChild(progressBar);
		this.fileProgressElement.appendChild(progressStatus);

		this.fileProgressWrapper.appendChild(this.fileProgressElement);

		document.getElementById(targetID).appendChild(this.fileProgressWrapper);
	} else {
		this.fileProgressElement = this.fileProgressWrapper.firstChild;
	}

	this.height = this.fileProgressWrapper.offsetHeight;

}
FileProgress.prototype.setProgress = function (percentage) {
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[1].className = "progressBarInProgress";
	this.fileProgressElement.childNodes[1].style.width = percentage + "%";
};

FileProgress.prototype.setComplete = function () {
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[1].className = "progressBarComplete";
};

FileProgress.prototype.setError = function () {
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[1].className = "progressBarError";
};

FileProgress.prototype.setCancelled = function () {
	this.fileProgressElement.className = "progressContainer";
	this.fileProgressElement.childNodes[1].className = "progressBarError";

	var oSelf = this;
	//setTimeout(function () {
	//	oSelf.disappear();
//	}, 3000);
};

FileProgress.prototype.setStatus = function (status) {
	this.fileProgressElement.childNodes[2].innerHTML = status;
};

// Show/Hide the cancel button
FileProgress.prototype.toggleCancel = function (show, swfUploadInstance) {
	return; // Not currently using cancel button
	this.fileProgressElement.childNodes[0].style.visibility = show ? "visible" : "hidden";
	if (swfUploadInstance) {
		var fileID = this.fileProgressID;
		this.fileProgressElement.childNodes[0].onclick = function () {
			swfUploadInstance.cancelUpload(fileID);
			return false;
		};
	}
};

// Fades out and clips away the FileProgress box.
FileProgress.prototype.disappear = function () {

	var reduceOpacityBy = 15;
	var reduceHeightBy = 4;
	var rate = 30;	// 15 fps

	if (this.opacity > 0) {
		this.opacity -= reduceOpacityBy;
		if (this.opacity < 0) {
			this.opacity = 0;
		}

		if (this.fileProgressWrapper.filters) {
			try {
				this.fileProgressWrapper.filters.item("DXImageTransform.Microsoft.Alpha").opacity = this.opacity;
			} catch (e) {
				// If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
				this.fileProgressWrapper.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=" + this.opacity + ")";
			}
		} else {
			this.fileProgressWrapper.style.opacity = this.opacity / 100;
		}
	}

	if (this.height > 0) {
		this.height -= reduceHeightBy;
		if (this.height < 0) {
			this.height = 0;
		}

		this.fileProgressWrapper.style.height = this.height + "px";
	}

	if (this.height > 0 || this.opacity > 0) {
		var oSelf = this;
		setTimeout(function () {
			oSelf.disappear();
		}, rate);
	} else {
		this.fileProgressWrapper.style.display = "none";
	}
};