(function() {

var Status = {
	 NONE      : 0
	,WAITING   : 1
	,UPLOADING : 2
	,UPLOADED  : 3
};

Hedera.Photos = new Class
({
	Extends: Hedera.Form
	,filesData: []
	,uploadCount: 0
	,errors: false
	,uploadQueue: []
	,isUploading: false

	,activate: function ()
	{
		this.$('schema').value = 'catalog';
	}

	,addFiles: function (files)
	{
		if (!files)
			return;

		for (var i = 0; i < files.length; i++)
			this.addFile (files[i]);
	}

	,addFile: function (file)
	{
		var doc = document;
		var div = doc.createElement ('div');

		var button = new Htk.Button ({
			tip: 'Remove',
			icon: 'delete'
		});
		button.on ('click', this.onFileRemove, this);
		div.appendChild (button.node);

		var thumb = doc.createElement ('img');
		thumb.file = file;
		thumb.className = 'thumb';
		div.appendChild (thumb);

		var reader = new FileReader ();
		reader.onload = function (e) { thumb.src = e.target.result; };
		reader.readAsDataURL(file);

		var name = doc.createElement ('input');
		name.type = 'text';
		name.value = getFileName (file.name);
		div.appendChild (name);

		var statusNode = doc.createElement ('span');
		statusNode.className = 'status';
		div.appendChild (statusNode);

		var fileData = {
			div: div,
			file: file,
			name: name,
			statusNode: statusNode,
			status: Status.NONE
		};
		this.filesData.push (fileData);
		button.value = fileData;

		this.$('file-list').appendChild (div);
	}

	,onUploadClick: function ()
	{
		var filesData = this.filesData;
		var count = 0;

		for (var i = 0; i < filesData.length; i++)
		{
			var fileData = filesData[i];

			if (fileData.status === Status.NONE)
			{
				this.setImageStatus (
					fileData, Status.WAITING, 'cloud-upload', _('Waiting for upload'));
				fileData.name.disabled = true;
				this.uploadQueue.push (fileData);
				count++;
			}
		}

		if (count === 0)
			Htk.Toast.showWarning (_('There are no files to upload'));
		else
			this.uploadNextFile ();
	}

	,uploadNextFile: function ()
	{
		if (this.isUploading)
			return;

		this.isUploading = true;

		var fileData = this.uploadQueue.shift ();
		this.setImageStatus (
			fileData, Status.UPLOADING, 'upload', _('Uploading file'));

		var formData = new FormData();
		formData.append ('image', fileData.file);
		formData.append ('name', fileData.name.value);
		formData.append ('schema', this.$('schema').value);
		formData.append ('srv', 'json:image/upload');
		this.conn.sendFormData (formData,
			this.onFileUpload.bind (this, fileData));
	}

	,onFileUpload: function (fileData, data, error)
	{
		this.isUploading = false;

		if (data)
		{
			this.setImageStatus (
				fileData, Status.UPLOADED, 'ok', _('Image uploaded'));
		}
		else
		{
			this.setImageStatus (
				fileData, Status.NONE, 'error', error.message);
			fileData.name.disabled = false;
			this.errors = true;
		}

		if (this.uploadQueue.length === 0)
		{
			if (this.errors)
				Htk.Toast.showError (_('Some errors happened on upload'));
			else
				Htk.Toast.showMessage (_('Upload finished successfully'));

			this.errors = false;
		}
		else
			this.uploadNextFile ();
	}

	,setImageStatus: function (fileData, status, icon, title)
	{
		fileData.status = status;

		var statusNode = fileData.statusNode;
		Vn.Node.removeChilds (statusNode);
	
		var iconNode = new Htk.Icon ({icon: icon});
		statusNode.appendChild (iconNode.node);
		statusNode.title = title ? title : '';
	}

	,onFileRemove: function (button)
	{
		var fileData = button.value;
		this.$('file-list').removeChild (fileData.div);

		for (var i = 0; i < this.filesData.length; i++)
		if (this.filesData[i] === fileData)
		{
			this.filesData.splice (i, 1);
			break;
		}
	}

	,onClearClick: function ()
	{
		this.filesData = [];
		Vn.Node.removeChilds (this.$('file-list'));
	}

	,onDropzoneClick: function ()
	{
		this.$('file').click ();
	}

	,onFileChange: function ()
	{
		this.addFiles (this.$('file').files);
	}

	,onDragEnter: function (event)
	{
		Vn.Node.addClass (this.$('dropzone'), 'dragover');
	}

	,onDragLeave: function (event)
	{
		Vn.Node.removeClass (this.$('dropzone'), 'dragover');
	}

	,onDragOver: function (event)
	{
		event.preventDefault ();
	}

	,onDragEnd: function (event)
	{
		Vn.Node.removeClass (this.$('dropzone'), 'dragover');
		event.dataTransfer.clearData ();
	}

	,onDrop: function (event)
	{
		event.preventDefault ();
		this.addFiles (event.dataTransfer.files);
	}
});

function getFileName (path)
{
	var barIndex = path.lastIndexOf ('/');
	if (barIndex === -1)
		barIndex = path.lastIndexOf ('\\');
	if (barIndex === -1)
		barIndex = 0;

	var dotIndex = path.lastIndexOf ('.');
	if (dotIndex === -1)
		dotIndex = 0;

	return path.substr (barIndex, dotIndex);
}

})();