/*
Queue Plug-in
	
Features:
*Adds a cancelQueue() method for cancelling the entire queue.
*All queued files are uploaded when startUpload() is called.
*If false is returned from uploadComplete then the queue upload is stopped.
If false is not returned (strict comparison) then the queue upload is continued.
*Adds a QueueComplete event that is fired when all the queued files have finished uploading.
Set the event handler with the queue_complete_handler setting.
		
*/

var i18nConfig = {
    pending: "Pending...",
    tooMany: "You have attempted to queue too many files.",
    uploadLimit: "You have reached the upload limit.",
    selectOne: "You may select one file.",
    selectMany: "You may select up to {%} files.",
    errTooBig: "File is too big.",
    errEmpty: "Cannot upload Zero Byte files.",
    errMime: "Invalid File Type.",
    errUnk: "Unhandled Error",
    uploading: "Uploading...",
    complete: "Complete.",
    cancelled: "Cancelled",
    stopped: "Stopped",
    filesUploaded: "file(s) uploaded."
};

var SWFUpload;
if (typeof (SWFUpload) === "function") {
    SWFUpload.queue = {};

    SWFUpload.prototype.initSettings = (function(oldInitSettings) {
        return function() {
            if (typeof (oldInitSettings) === "function") {
                oldInitSettings.call(this);
            }

            this.queueSettings = {};

            this.queueSettings.queue_cancelled_flag = false;
            this.queueSettings.queue_upload_count = 0;

            this.queueSettings.user_upload_complete_handler = this.settings.upload_complete_handler;
            this.queueSettings.user_upload_start_handler = this.settings.upload_start_handler;
            this.settings.upload_complete_handler = SWFUpload.queue.uploadCompleteHandler;
            this.settings.upload_start_handler = SWFUpload.queue.uploadStartHandler;

            this.settings.queue_complete_handler = this.settings.queue_complete_handler || null;
        };
    })(SWFUpload.prototype.initSettings);

    SWFUpload.prototype.startUpload = function(fileID) {
        this.queueSettings.queue_cancelled_flag = false;
        this.callFlash("StartUpload", [fileID]);
    };

    SWFUpload.prototype.cancelQueue = function() {
        this.queueSettings.queue_cancelled_flag = true;
        this.stopUpload();

        var stats = this.getStats();
        while (stats.files_queued > 0) {
            this.cancelUpload();
            stats = this.getStats();
        }
    };

    SWFUpload.queue.uploadStartHandler = function(file) {
        var returnValue;
        if (typeof (this.queueSettings.user_upload_start_handler) === "function") {
            returnValue = this.queueSettings.user_upload_start_handler.call(this, file);
        }

        // To prevent upload a real "FALSE" value must be returned, otherwise default to a real "TRUE" value.
        returnValue = (returnValue === false) ? false : (true && totNumKBytesUploaded < this.customSettings.maxTotalSize);

        this.queueSettings.queue_cancelled_flag = !returnValue;

        return returnValue;
    };

    SWFUpload.queue.uploadCompleteHandler = function(file) {
        var user_upload_complete_handler = this.queueSettings.user_upload_complete_handler;
        var continueUpload;

        if (file.filestatus === SWFUpload.FILE_STATUS.COMPLETE) {
            this.queueSettings.queue_upload_count++;
        }

        if (typeof (user_upload_complete_handler) === "function") {
            continueUpload = (user_upload_complete_handler.call(this, file) === false) ? false : true;
        } else if (file.filestatus === SWFUpload.FILE_STATUS.QUEUED) {
            // If the file was stopped and re-queued don't restart the upload
            continueUpload = false;
        } else {
            continueUpload = true;
        }

        if (continueUpload) {
            var stats = this.getStats();
            if (stats.files_queued > 0 && this.queueSettings.queue_cancelled_flag === false) {
                this.startUpload();
            } else if (this.queueSettings.queue_cancelled_flag === false) {
                this.queueEvent("queue_complete_handler", [this.queueSettings.queue_upload_count]);
                this.queueSettings.queue_upload_count = 0;
            } else {
                this.queueSettings.queue_cancelled_flag = false;
                this.queueSettings.queue_upload_count = 0;
            }
        }
    };
}


/*
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(progressStatus);
        this.fileProgressElement.appendChild(progressBar);

        this.fileProgressWrapper.appendChild(this.fileProgressElement);

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

    this.height = this.fileProgressWrapper.offsetHeight;
    this.setTimer(null);


}

FileProgress.prototype.setTimer = function(timer) {
    this.fileProgressElement["FP_TIMER"] = timer;
};
FileProgress.prototype.getTimer = function(timer) {
    return this.fileProgressElement["FP_TIMER"] || null;
};

FileProgress.prototype.reset = function() {
    this.fileProgressElement.className = "progressContainer";

    this.fileProgressElement.childNodes[2].innerHTML = "&nbsp;";
    this.fileProgressElement.childNodes[2].className = "progressBarStatus";

    this.fileProgressElement.childNodes[3].className = "progressBarInProgress";
    this.fileProgressElement.childNodes[3].style.width = "0%";

    this.appear();
};

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

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

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

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

    var oSelf = this;
    this.setTimer(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;
        };
    }
};

FileProgress.prototype.appear = function() {
    if (this.getTimer() !== null) {
        clearTimeout(this.getTimer());
        this.setTimer(null);
    }

    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;
        this.setTimer(setTimeout(function() {
            oSelf.disappear();
        }, rate));
    } else {
        this.fileProgressWrapper.style.display = "none";
        this.setTimer(null);
    }
};


/**************/
function fileDialogStart() {
    /* I don't need to do anything here */
}

function fileQueued(file) {
    try {
        // You might include code here that prevents the form from being submitted while the upload is in
        // progress.  Then you'll want to put code in the Queue Complete handler to "unblock" the form
        var progress = new FileProgress(file, this.customSettings.progressTarget);
        progress.setStatus(i18nConfig.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(i18nConfig.tooMany + "\n" + (message === 0 ? i18nConfig.uploadLimit : (message > 1 ? i18nConfig.selectMany.replace("{%}", message) : i18nConfig.selectOne)));
            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(i18nConfig.errTooBig);
                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(i18nConfig.errEmpty);
                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(i18nConfig.errMime);
                this.debug("Error Code: Invalid File Type, File name: " + file.name + ", File size: " + file.size + ", Message: " + message);
                break;
            default:
                if (file !== null) {
                    progress.setStatus(i18nConfig.errUnk);
                }
                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(i18nConfig.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(i18nConfig.uploading);
    } catch (ex) {
        this.debug(ex);
    }
}

function uploadSuccess(file, serverData) {
    try {
        var size = parseInt(serverData);
        totNumKBytesUploaded += (size / 1024);
        totNumFilesUploaded += 1;
        serverData = serverData.replace(size + "/", "");
        var progress = new FileProgress(file, this.customSettings.progressTarget);
        progress.setComplete();
        progress.setStatus(i18nConfig.complete);
        if (totNumKBytesUploaded >= this.customSettings.maxTotalSize)
            this.cancelQueue();
        progress.toggleCancel(false);
        setMsgStatus();
    } catch (ex) {
        this.debug(ex);
    }
}

function uploadComplete(file) {
    try {
        /*  I want the next upload to continue automatically so I'll call startUpload here */
        if (this.getStats().files_queued === 0) {
            document.getElementById(this.customSettings.cancelButtonId).disabled = true;
        } else {
            this.startUpload();
        }
    } 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(i18nConfig.cancelled);
                progress.setCancelled();
                break;
            case SWFUpload.UPLOAD_ERROR.UPLOAD_STOPPED:
                progress.setStatus(i18nConfig.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) {
    if (this.getStats().files_queued === 0) {
        document.getElementById(this.customSettings.cancelButtonId).disabled = true;
    }
}

var totNumFilesUploaded = 0;
var totNumKBytesUploaded = 0;
function setMsgStatus() {
    var status = document.getElementById("divStatus");
    status.innerHTML = totNumFilesUploaded + " " + i18nConfig.filesUploaded + " (" + Math.round(totNumKBytesUploaded) + "Kb)";
}

// This event comes from the Queue Plugin
function queueComplete(numFilesUploaded) {
}