/**
 * @name		Album Module
 * @description	Takes care of every action an album can handle and execute.
 * @author		Tobias Reich
 * @copyright	2014 by Tobias Reich
 */

upload = {

	show: function(title, files, callback) {

		upload.close(true);
		$("body").append(build.uploadModal(title, files));

		if (callback!=null&&callback!=undefined) callback();

	},

	setIcon: function(icon) {

		$(".upload_message a").remove();
		$(".upload_message").prepend("<a class='icon-" + icon + "'></a>");

	},

	setProgress: function(progress) {

		$(".progressbar div").css("width", progress + "%");

	},

	setText: function(text) {

		$(".progressbar").remove();
		$(".upload_message").append("<p>" + text + "</p>");

	},

	notify: function(title) {

		var popup;

		if (!window.webkitNotifications) return false;

		if (window.webkitNotifications.checkPermission()!==0) window.webkitNotifications.requestPermission();

		if (window.webkitNotifications.checkPermission()===0&&title) {
			popup = window.webkitNotifications.createNotification("", title, "You can now manage your new photo(s).");
			popup.show();
		}

	},

	start: {

		local: function(files) {

			var albumID = album.getID(),
				process = function(files, file) {

					var formData = new FormData(),
						xhr = new XMLHttpRequest(),
						pre_progress = 0,
						progress,
						finish = function() {

							window.onbeforeunload = null;

							$("#upload_files").val("");

							upload.close();
							upload.notify("Upload complete");

							if (album.getID()===false) lychee.goto("0");
							else album.load(albumID);

						};

					// Check if file is supported
					if (file.supported===false) {

						// Skip file
						if (file.next!==null) process(files, file.next);
						else {

							// Look for supported files
							// If zero files are supported, hide the upload after a delay

							var hasSupportedFiles = false;

							for (var i = 0; i < files.length; i++) {

								if (files[i].supported===true) {
									hasSupportedFiles = true;
									break;
								}

							}

							if (hasSupportedFiles===false) setTimeout(finish, 2000);

						}

						return false;

					}

					formData.append("function", "upload");
					formData.append("albumID", albumID);
					formData.append(0, file);

					xhr.open("POST", lychee.api_path);

					xhr.onload = function() {

						var wait = false;

						file.ready = true;

						// Set status
						if (xhr.status===200&&xhr.responseText==="1") {

							// Success
							$(".upload_message .rows .row:nth-child(" + (file.num+1) + ") .status")
								.html("Finished")
								.addClass("success");

						} else {

							// Error
							$(".upload_message .rows .row:nth-child(" + (file.num+1) + ") .status")
								.html("Error")
								.addClass("error");
							$(".upload_message .rows .row:nth-child(" + (file.num+1) + ") p.notice")
								.html("Server returned the status code " + xhr.status)
								.show();

							// Throw error
							lychee.error("Upload failed. Server returned the status code " + xhr.status + "!", xhr, xhr.responseText);

						}

						// Check if there are file which are not finished
						for (var i = 0; i < files.length; i++) {

							if (files[i].ready===false) {
								wait = true;
								break;
							}

						}

						// Finish upload when all files are finished
						if (wait===false) finish();

					};

					xhr.upload.onprogress = function(e) {

						if (e.lengthComputable) {

							// Calculate progress
							progress = (e.loaded / e.total * 100 | 0);

							// Set progress when progress has changed
							if (progress>pre_progress) {
								$(".upload_message .rows .row:nth-child(" + (file.num+1) + ") .status").html(progress + "%");
								pre_progress = progress;
							}

							if (progress>=100) {

								// Scroll to the uploading file
								var scrollPos = 0;
								if ((file.num+1)>4) scrollPos = (file.num + 1 - 4) * 40
								$(".upload_message .rows").scrollTop(scrollPos);

								// Set status to processing
								$(".upload_message .rows .row:nth-child(" + (file.num+1) + ") .status").html("Processing");

								// Upload next file
								if (file.next!==null) process(files, file.next);

							}

						}

					};

					xhr.send(formData);

				};

			if (files.length<=0) return false;
			if (albumID===false||visible.albums()===true) albumID = 0;

			for (var i = 0; i < files.length; i++) {

				files[i].num = i;
				files[i].ready = false;
				files[i].supported = true;

				if (i < files.length-1) files[i].next = files[i+1];
				else files[i].next = null;

				// Check if file is supported
				if (files[i].type!=="image/jpeg"&&files[i].type!=="image/jpg"&&files[i].type!=="image/png"&&files[i].type!=="image/gif") {

					files[i].ready = true;
					files[i].supported = false;

				}

			}

			window.onbeforeunload = function() { return "Lychee is currently uploading!"; };

			upload.show("Uploading", files);

			// Upload first file
			process(files, files[0]);

		},

		url: function() {

			var albumID = album.getID(),
				params,
				extension,
				buttons,
				link,
				files = [];

			if (albumID===false) albumID = 0;

			buttons = [
				["Import", function() {

					link = $(".message input.text").val();

					if (link&&link.length>3) {

						extension = link.split('.').pop();
						if (extension!=="jpeg"&&extension!=="jpg"&&extension!=="png"&&extension!=="gif"&&extension!=="webp") {
							loadingBar.show("error", "The file format of this link is not supported.");
							return false;
						}

						files[0] = {
							name: link,
							supported: true
						}

						upload.show("Importing URL", files, function() {
							$(".upload_message .rows .row .status").html("Importing");
						});

						params = "importUrl&url=" + escape(encodeURI(link)) + "&albumID=" + albumID;
						lychee.api(params, function(data) {

							upload.close();
							upload.notify("Import complete");

							if (album.getID()===false) lychee.goto("0");
							else album.load(albumID);

							if (data!==true) lychee.error(null, params, data);

						});

					} else loadingBar.show("error", "Link to short or too long. Please try another one!");

				}],
				["Cancel", function() {}]
			];

			modal.show("Import from Link", "Please enter the direct link to a photo to import it: <input class='text' type='text' placeholder='http://' value='http://'>", buttons);

		},

		server: function() {

			var albumID = album.getID(),
				params,
				buttons,
				files = [],
				path;

			if (albumID===false) albumID = 0;

			buttons = [
				["Import", function() {

					path = $(".message input.text").val();

					files[0] = {
						name: path,
						supported: true
					};

					upload.show("Importing from server", files, function() {
						$(".upload_message .rows .row .status").html("Importing");
					});

					params = "importServer&albumID=" + albumID + "&path=" + escape(encodeURI(path));
					lychee.api(params, function(data) {

						upload.close();
						upload.notify("Import complete");

						if (data==="Notice: Import only contains albums!") {
							if (visible.albums()) lychee.load();
							else lychee.goto("");
						}
						else if (album.getID()===false) lychee.goto("0");
						else album.load(albumID);

						if (data==="Notice: Import only contains albums!") return true;
						else if (data==="Warning: Folder empty!") lychee.error("Folder empty. No photos imported!", params, data);
						else if (data!==true) lychee.error(null, params, data);

					});

				}],
				["Cancel", function() {}]
			];

			modal.show("Import from Server", "This action will import all photos, folders and sub-folders which are located in the following directory. The <b>original files will be deleted</b> after the import when possible. <input class='text' type='text' maxlength='100' placeholder='Absolute path to directory' value='" + lychee.location + "uploads/import/'>", buttons);

		},

		dropbox: function() {

			var albumID = album.getID(),
				params,
				links = "";

			if (albumID===false) albumID = 0;

			lychee.loadDropbox(function() {
				Dropbox.choose({
					linkType: "direct",
					multiselect: true,
					success: function(files) {

						for (var i = 0; i < files.length; i++) {

							links += files[i].link + ",";

							files[i] = {
								name: files[i].link,
								supported: true
							};

						}

						// Remove last comma
						links = links.substr(0, links.length-1);

						upload.show("Importing from Dropbox", files, function() {
							$(".upload_message .rows .row .status").html("Importing");
						});

						params = "importUrl&url=" + escape(links) + "&albumID=" + albumID;
						lychee.api(params, function(data) {

							upload.close();
							upload.notify("Import complete");

							if (album.getID()===false) lychee.goto("0");
							else album.load(albumID);

							if (data!==true) lychee.error(null, params, data);

						});

					}
				});
			});

		}

	},

	close: function(force) {

		if (force===true) {
			$(".upload_overlay").remove();
		} else {
			upload.setProgress(100);
			$(".upload_overlay").removeClass("fadeIn").css("opacity", 0);
			setTimeout(function() { $(".upload_overlay").remove() }, 300);
		}

	}

};