/* Form validation */
function validSingle() {
	try {
		title = document.single_form.single_title.value;
		tags = document.single_form.single_tags.value;
 
		valuesOk = true;
		if (title==null||title=="") {
			valuesOk = false;
		}
		document.getElementById('btnSubmit_single').disabled = !valuesOk; 
		//Enable flash overlay, if valid
		if (valuesOk) { 
			var class_items = document.getElementsByClassName('swfupload');
			class_items[0].style.position = "absolute";
			class_items[0].style.zIndex = "1";
		}
		else {
			var class_items = document.getElementsByClassName('swfupload');
			class_items[0].style.position = "static";
			class_items[0].style.zIndex = "0";
		}
	}
	catch (e){
		
	}
}


/* **********************
   Event Handlers modified from overlay demo
   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.
   ********************** */

function swfUploadPreLoad() {
	var self = this;
	var loading = function () {
		//document.getElementById("divSWFUploadUI").style.display = "none";
		document.getElementById("divLoadingContent").style.display = "";

		var longLoad = function () {
			document.getElementById("divLoadingContent").style.display = "none";
			document.getElementById("divLongLoading").style.display = "";
		};
		this.customSettings.loadingTimeout = setTimeout(function () {
				longLoad.call(self)
			},
			15 * 1000
		);
	};
	
	this.customSettings.loadingTimeout = setTimeout(function () {
			loading.call(self);
		},
		1*1000
	);
}
function swfUploadLoaded() {
	var self = this;
	clearTimeout(this.customSettings.loadingTimeout);
	//document.getElementById("divSWFUploadUI").style.visibility = "visible";
	//document.getElementById("divSWFUploadUI").style.display = "block";
	document.getElementById("divLoadingContent").style.display = "none";
	document.getElementById("divLongLoading").style.display = "none";
	document.getElementById("divAlternateContent").style.display = "none";
	
	//document.getElementById("btnBrowse").onclick = function () { self.selectFiles(); };
	//document.getElementById("btnCancel").onclick = function () { self.cancelQueue(); };
	formChecker = window.setInterval(validSingle, 1000); //Check form values every second
	validSingle();
}
   
function swfUploadLoadFailed() {
	clearTimeout(this.customSettings.loadingTimeout);
	//document.getElementById("divSWFUploadUI").style.display = "none";
	document.getElementById("divLoadingContent").style.display = "none";
	document.getElementById("divLongLoading").style.display = "none";
	document.getElementById("divAlternateContent").style.display = "";
}
   
   
function fileQueued(file) {
	try {
		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setStatus("Pending...");
		progress.toggleCancel(true, this);

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

}

function fileQueueError(file, errorCode, message) {
	try {
		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("File is too big.");
			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("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("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("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).disabled = false;
		//}
		
		/* 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...");
		progress.toggleCancel(true, this);
	}
	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) { // *modified
	try {
		this.customSettings.upload_successful = true;
		//store filename in form
		$('#'+this.customSettings.hidFileID).val(serverData);

		var progress = new FileProgress(file, this.customSettings.progressTarget);
		progress.setComplete();
		progress.setStatus("Complete.");
		//progress.toggleCancel(false);

	} catch (ex) {
		this.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).disabled = true;
			}
			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) { // * modified
	if (this.customSettings.upload_successful) {
		try {
			$('#single_form').submit();
		} catch (ex) {
			alert("Error submitting form");
		}
	} else {
		file.id = "singlefile";	// This makes it so FileProgress only makes a single UI element, instead of one for each file
	}
}

// This event comes from the Queue Plugin
function queueComplete(numFilesUploaded) {
	//var status = document.getElementById("divStatus");
	//status.innerHTML = numFilesUploaded + " file" + (numFilesUploaded === 1 ? "" : "s") + " uploaded.";
}



/* ***************
 * 
 * Copied from overlay demo 2.2.0.1
 * 
 * 
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 = " ";

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

	this.fileProgressWrapper.appendChild(this.fileProgressElement);

	document.getElementById(targetID).appendChild(this.fileProgressWrapper);
} else {
	this.fileProgressElement = this.fileProgressWrapper.firstChild;
	this.fileProgressElement.childNodes[1].innerHTML = file.name;
}

this.height = this.fileProgressWrapper.offsetHeight;

}
FileProgress.prototype.setProgress = function (percentage) {
this.fileProgressElement.className = "progressContainer green";
this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
this.fileProgressElement.childNodes[3].style.width = percentage + "%";
};
FileProgress.prototype.setComplete = function () {
this.appear();
this.fileProgressElement.className = "progressContainer blue";
this.fileProgressElement.childNodes[3].className = "progressBarComplete";
this.fileProgressElement.childNodes[3].style.width = "";

var oSelf = this;
setTimeout(function () {
	oSelf.disappear();
}, 10000);
};
FileProgress.prototype.setError = function () {
this.appear();
this.fileProgressElement.className = "progressContainer red";
this.fileProgressElement.childNodes[3].className = "progressBarError";
this.fileProgressElement.childNodes[3].style.width = "";

var oSelf = this;
setTimeout(function () {
	oSelf.disappear();
}, 5000);
};
FileProgress.prototype.setCancelled = function () {
this.appear();
this.fileProgressElement.className = "progressContainer";
this.fileProgressElement.childNodes[3].className = "progressBarError";
this.fileProgressElement.childNodes[3].style.width = "";

var oSelf = this;
setTimeout(function () {
	oSelf.disappear();
}, 2000);
};
FileProgress.prototype.setStatus = function (status) {
this.fileProgressElement.childNodes[2].innerHTML = status;
};

//Show/Hide the cancel button
FileProgress.prototype.toggleCancel = function (show, swfUploadInstance) {
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;
	};
}
};

//Makes sure the FileProgress box is visible
FileProgress.prototype.appear = function () {
	if (this.fileProgressWrapper.filters) {
		try {
			this.fileProgressWrapper.filters.item("DXImageTransform.Microsoft.Alpha").opacity = 100;
		} 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=100)";
		}
	} else {
		this.fileProgressWrapper.style.opacity = 1;
	}
	
	this.fileProgressWrapper.style.height = "";
	this.height = this.fileProgressWrapper.offsetHeight;
	this.opacity = 100;
	this.fileProgressWrapper.style.display = "";

};

//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";
}
};