/// jQuery plugin to add support for SwfUpload
/// (c) 2008 Steven Sanderson

(function($) {
	$.fn.makeAsyncUploader = function(options) {
		return this.each(function() {
			// Put in place a new container with a unique ID
			var id = $(this).attr("id");
			var container = $('<span class="asyncUploader"></span>');
			container.append($('<div class="ProgressBar" id="progress1"> <div>&nbsp;</div> </div>'));
			container.append($('<span id="' + id + '_completedMessage"/>'));
			container.append($('<span id="' + id + '_uploading" class="file_upload_cancel"><input type="button" value="Cancel" /></span>'));
			container.append($("<span id='" + id + "_swf'/>"));
			container.append($("<input type='hidden' name='" + id + "_filename'/>"));
			container.append($("<input type='hidden' name='" + id + "_file_id'/>"));
			$(this).before(container).remove();
			$("div.ProgressBar", container).hide();
			$("span[id$=_uploading]", container).hide();


			// Instantiate the uploader SWF
			var swfu;
			var width = 109, height = 22;
			if (options) {
				width = options.width || width;
				height = options.height || height;
			}
			var defaults = {
				flash_url: "swfupload.swf",
				upload_url: "/Home/AsyncUpload",
				file_size_limit: "3 MB",
				file_types: "*.*",
				file_types_description: "All Files",
				debug: false,

				button_image_url: "blankButton.png",
				button_width: width,
				button_height: height,
				button_placeholder_id: id + "_swf",
				button_text: "<font face='Arial' size='13pt'>Choose file</font>",
				button_text_left_padding: (width - 70) / 2,
				button_text_top_padding: 1,

				// Called when the user chooses a new file from the file browser prompt (begins the upload)
				file_queued_handler: function(file) { swfu.startUpload(); },

				// Called when a file doesn't even begin to upload, because of some error
				file_queue_error_handler: function(file, code, msg) { alert("Sorry, your file wasn't uploaded: " + msg); },

				// Called when an error occurs during upload
				upload_error_handler: function(file, code, msg) { alert("Sorry, your file wasn't uploaded: " + msg); },

				// Called when upload is beginning (switches controls to uploading state)
				upload_start_handler: function() {
					swfu.setButtonDimensions(0, height);
					$("input[name$=_filename]", container).val("");
					$("input[name$=_file_id]", container).val("");
					$("div.ProgressBar div", container).css("width", "0px");
					$("div.ProgressBar", container).show();
					$("span[id$=_uploading]", container).show();
					$("span[id$=_completedMessage]", container).html("").hide();

					if (options.disableDuringUpload)
						$(options.disableDuringUpload).attr("disabled", "disabled");
				},

				// Called when upload completed successfully (puts success details into hidden fields)
				upload_success_filelink: function(file_id) {
					return "#";
				},
				
				upload_filesize_text: function(byte_size) {
				
					var KiloByte = 1024;
					var MegaByte = KiloByte * KiloByte;
					var GigaByte = MegaByte * KiloByte;

					if (byte_size >= GigaByte)
						return (byte_size / GigaByte).toFixed(1) + " GB";
					if (byte_size >= MegaByte)
						return (byte_size / MegaByte).toFixed(1) + " MB";
					if (byte_size >= KiloByte)
						return Math.round((byte_size / KiloByte).toString()) + " KB";

					return byte_size.toString() + " Byte";
				},
				
				upload_success_handler: function(file, response) {
					$("input[name$=_filename]", container).val(file.name);
					$("input[name$=_file_id]", container).val(response);
					$("span[id$=_completedMessage]", container).html('<b><a href="{2}">{0}</a></b> ({1})'
									.replace("{0}", file.name)
									.replace("{1}", defaults.upload_filesize_text(file.size))// Math.round(file.size / 1024))
									.replace("{2}", defaults.upload_success_filelink(response))
							   );
				},

				// Called when upload is finished (either success or failure - reverts controls to non-uploading state)
				upload_complete_handler: function() {
					var clearup = function() {
						$("div.ProgressBar", container).hide();
						$("span[id$=_completedMessage]", container).show();
						$("span[id$=_uploading]", container).hide();
						swfu.setButtonDimensions(width, height);
					};

					var tmpfunc = function() { };

					if ($("input[name$=_filename]", container).val() != "") // Success
						$("div.ProgressBar div", container).animate({ width: "100%" }, { queue: false, duration: "fast", complete: clearup });
					//					{
					//						$(".ProgressBar").progressBar(100, { showText: false, boxImage: options.progress_box_url, barImage: options.progress_bar_url });
					//						clearup();
					//					}
					else // Fail
						clearup();

					if (options.disableDuringUpload)
						$(options.disableDuringUpload).removeAttr("disabled");
				},

				// Called periodically during upload (moves the progess bar along)
				upload_progress_handler: function(file, bytes, total) {
					var percent = 100 * bytes / total;
					//$(".ProgressBar").progressBar(percent, { showText: false, boxImage: options.progress_box_url, barImage: options.progress_bar_url });
					//$("div.ProgressBar div", container).animate({ width: percent + "%" });
					$("div.ProgressBar div", container).width(percent + "%");
				}
			};
			swfu = new SWFUpload($.extend(defaults, options || {}));

			// Called when user clicks "cancel" (forces the upload to end, and eliminates progress bar immediately)
			$("span[id$=_uploading] input[type='button']", container).click(function() {
				swfu.cancelUpload(null, false);
			});

			// Give the effect of preserving state, if requested
			if (options.existingFilename || "" != "") {
				$("span[id$=_completedMessage]", container).html("<b>{0}</b> ({1} KB)"
                                .replace("{0}", options.existingFilename)
                                .replace("{1}", options.existingFileSize ? Math.round(options.existingFileSize / 1024) : "?")
                            ).show();
				$("input[name$=_filename]", container).val(options.existingFilename);
			}
			if (options.existingGuid || "" != "")
				$("input[name$=_file_id]", container).val(options.existingGuid);
		});
	}
})(jQuery);