/* global dijit, __ */

let init_params = {};
let _label_base_index = -1024;
let loading_progress = 0;
let notify_hide_timerid = false;

Ajax.Base.prototype.initialize = Ajax.Base.prototype.initialize.wrap(
	function (callOriginal, options) {

		if (getInitParam("csrf_token") != undefined) {
			Object.extend(options, options || { });

			if (Object.isString(options.parameters))
				options.parameters = options.parameters.toQueryParams();
			else if (Object.isHash(options.parameters))
				options.parameters = options.parameters.toObject();

			options.parameters["csrf_token"] = getInitParam("csrf_token");
		}

		return callOriginal(options);
	}
);

/* xhr shorthand helpers */

function xhrPost(url, params, complete) {
	console.log("xhrPost:", params);
	return new Ajax.Request(url, {
		parameters: params,
		onComplete: complete
	});
}

function xhrJson(url, params, complete) {
	return xhrPost(url, params, (reply) => {
		try {
			const obj = JSON.parse(reply.responseText);
			complete(obj);
		} catch (e) {
			console.error("xhrJson", e, reply);
			complete(null);
		}

	})
}

/* add method to remove element from array */
Array.prototype.remove = function(s) {
	for (let i=0; i < this.length; i++) {
		if (s == this[i]) this.splice(i, 1);
	}
};

const Utils = {
	_rpc_seq: 0,
	hotkey_prefix: 0,
	hotkey_prefix_pressed: false,
	hotkey_prefix_timeout: 0,
	next_seq: function() {
		this._rpc_seq += 1;
		return this._rpc_seq;
	},
	get_seq: function() {
		return this._rpc_seq;
	},
	setLoadingProgress: function(p) {
		loading_progress += p;

		if (dijit.byId("loading_bar"))
			dijit.byId("loading_bar").update({progress: loading_progress});

		if (loading_progress >= 90)
			Element.hide("overlay");

	},
	keyeventToAction: function(event) {

		const hotkeys_map = getInitParam("hotkeys");
		const keycode = event.which;
		const keychar = String.fromCharCode(keycode).toLowerCase();

		if (keycode == 27) { // escape and drop prefix
			this.hotkey_prefix = false;
		}

		if (keycode == 16 || keycode == 17) return; // ignore lone shift / ctrl

		if (!this.hotkey_prefix && hotkeys_map[0].indexOf(keychar) != -1) {

			this.hotkey_prefix = keychar;
			$("cmdline").innerHTML = keychar;
			Element.show("cmdline");

			window.clearTimeout(this.hotkey_prefix_timeout);
			this.hotkey_prefix_timeout = window.setTimeout(() => {
				this.hotkey_prefix = false;
				Element.hide("cmdline");
			}, 3 * 1000);

			event.stopPropagation();

			return false;
		}

		Element.hide("cmdline");

		let hotkey_name = keychar.search(/[a-zA-Z0-9]/) != -1 ? keychar : "(" + keycode + ")";

		// ensure ^*char notation
		if (event.shiftKey) hotkey_name = "*" + hotkey_name;
		if (event.ctrlKey) hotkey_name = "^" + hotkey_name;
		if (event.altKey) hotkey_name = "+" + hotkey_name;
		if (event.metaKey) hotkey_name = "%" + hotkey_name;

		const hotkey_full = this.hotkey_prefix ? this.hotkey_prefix + " " + hotkey_name : hotkey_name;
		this.hotkey_prefix = false;

		let action_name = false;

		for (const sequence in hotkeys_map[1]) {
			if (hotkeys_map[1].hasOwnProperty(sequence)) {
				if (sequence == hotkey_full) {
					action_name = hotkeys_map[1][sequence];
					break;
				}
			}
		}

		console.log('keyeventToAction', hotkey_full, '=>', action_name);

		return action_name;
	},
	cleanupMemory: function(root) {
		const dijits = dojo.query("[widgetid]", dijit.byId(root).domNode).map(dijit.byNode);

		dijits.each(function (d) {
			dojo.destroy(d.domNode);
		});

		$$("#" + root + " *").each(function (i) {
			i.parentNode ? i.parentNode.removeChild(i) : true;
		});
	},
	helpDialog: function(topic) {
		const query = "backend.php?op=backend&method=help&topic=" + param_escape(topic);

		if (dijit.byId("helpDlg"))
			dijit.byId("helpDlg").destroyRecursive();

		const dialog = new dijit.Dialog({
			id: "helpDlg",
			title: __("Help"),
			style: "width: 600px",
			href: query,
		});

		dialog.show();
	},
	displayDlg: function(title, id, param, callback) {
		notify_progress("Loading, please wait...", true);

		const query = {op: "dlg", method: id, param: param};

		xhrPost("backend.php", query, (transport) => {
			try {
				const content = transport.responseText;

				let dialog = dijit.byId("infoBox");

				if (!dialog) {
					dialog = new dijit.Dialog({
						title: title,
						id: 'infoBox',
						style: "width: 600px",
						onCancel: function () {
							return true;
						},
						onExecute: function () {
							return true;
						},
						onClose: function () {
							return true;
						},
						content: content
					});
				} else {
					dialog.attr('title', title);
					dialog.attr('content', content);
				}

				dialog.show();

				notify("");

				if (callback) callback(transport);
			} catch (e) {
				exception_error(e);
			}
		});

		return false;
	},
	handleRpcJson: function(transport) {

		const netalert_dijit = dijit.byId("net-alert");
		let netalert = false;

		if (netalert_dijit) netalert = netalert_dijit.domNode;

		try {
			const reply = JSON.parse(transport.responseText);

			if (reply) {

				const error = reply['error'];

				if (error) {
					const code = error['code'];
					const msg = error['msg'];

					console.warn("[handleRpcJson] received fatal error " + code + "/" + msg);

					if (code != 0) {
						fatalError(code, msg);
						return false;
					}
				}

				const seq = reply['seq'];

				if (seq && this.get_seq() != seq) {
					console.log("[handleRpcJson] sequence mismatch: " + seq +
						" (want: " + this.get_seq() + ")");
					return true;
				}

				const message = reply['message'];

				if (message == "UPDATE_COUNTERS") {
					console.log("need to refresh counters...");
					setInitParam("last_article_id", -1);
					Feeds.requestCounters(true);
				}

				const counters = reply['counters'];

				if (counters)
					Feeds.parseCounters(counters);

				const runtime_info = reply['runtime-info'];

				if (runtime_info)
					Utils.parseRuntimeInfo(runtime_info);

				if (netalert) netalert.hide();

				return reply;

			} else {
				if (netalert)
					netalert.show();
				else
					notify_error("Communication problem with server.");
			}

		} catch (e) {
			if (netalert)
				netalert.show();
			else
				notify_error("Communication problem with server.");

			console.error(e);
		}

		return false;
	},
	parseRuntimeInfo: function(data) {

		//console.log("parsing runtime info...");

		for (const k in data) {
			if (data.hasOwnProperty(k)) {
				const v = data[k];

				console.log("RI:", k, "=>", v);

				if (k == "dep_ts" && parseInt(getInitParam("dep_ts")) > 0) {
					if (parseInt(getInitParam("dep_ts")) < parseInt(v) && getInitParam("reload_on_ts_change")) {
						window.location.reload();
					}
				}

				if (k == "daemon_is_running" && v != 1) {
					notify_error("<span onclick=\"Utils.explainError(1)\">Update daemon is not running.</span>", true);
					return;
				}

				if (k == "update_result") {
					const updatesIcon = dijit.byId("updatesIcon").domNode;

					if (v) {
						Element.show(updatesIcon);
					} else {
						Element.hide(updatesIcon);
					}
				}

				if (k == "daemon_stamp_ok" && v != 1) {
					notify_error("<span onclick=\"Utils.explainError(3)\">Update daemon is not updating feeds.</span>", true);
					return;
				}

				if (k == "max_feed_id" || k == "num_feeds") {
					if (init_params[k] != v) {
						console.log("feed count changed, need to reload feedlist.");
						Feeds.reload();
					}
				}

				init_params[k] = v;
			}
		}

		PluginHost.run(PluginHost.HOOK_RUNTIME_INFO_LOADED, data);
	},
	backendSanityCallback: function (transport) {

		const reply = JSON.parse(transport.responseText);

		if (!reply) {
			fatalError(3, "Sanity check: invalid RPC reply", transport.responseText);
			return;
		}

		const error_code = reply['error']['code'];

		if (error_code && error_code != 0) {
			return fatalError(error_code, reply['error']['message']);
		}

		console.log("sanity check ok");

		const params = reply['init-params'];

		if (params) {
			console.log('reading init-params...');

			for (const k in params) {
				if (params.hasOwnProperty(k)) {
					switch (k) {
						case "label_base_index":
							_label_base_index = parseInt(params[k]);
							break;
						case "hotkeys":
							// filter mnemonic definitions (used for help panel) from hotkeys map
							// i.e. *(191)|Ctrl-/ -> *(191)

							const tmp = [];
							for (const sequence in params[k][1]) {
								if (params[k][1].hasOwnProperty(sequence)) {
									const filtered = sequence.replace(/\|.*$/, "");
									tmp[filtered] = params[k][1][sequence];
								}
							}

							params[k][1] = tmp;
							break;
					}

					console.log("IP:", k, "=>", params[k]);
				}
			}

			init_params = params;

			// PluginHost might not be available on non-index pages
			window.PluginHost && PluginHost.run(PluginHost.HOOK_PARAMS_LOADED, init_params);
		}

		App.initSecondStage();
	},
	explainError: function(code) {
		return this.displayDlg(__("Error explained"), "explainError", code);
	},
};

const CommonDialogs = {
	quickAddFeed: function() {
		const query = "backend.php?op=feeds&method=quickAddFeed";

		// overlapping widgets
		if (dijit.byId("batchSubDlg")) dijit.byId("batchSubDlg").destroyRecursive();
		if (dijit.byId("feedAddDlg")) dijit.byId("feedAddDlg").destroyRecursive();

		const dialog = new dijit.Dialog({
			id: "feedAddDlg",
			title: __("Subscribe to Feed"),
			style: "width: 600px",
			show_error: function (msg) {
				const elem = $("fadd_error_message");

				elem.innerHTML = msg;

				if (!Element.visible(elem))
					new Effect.Appear(elem);

			},
			execute: function () {
				if (this.validate()) {
					console.log(dojo.objectToQuery(this.attr('value')));

					const feed_url = this.attr('value').feed;

					Element.show("feed_add_spinner");
					Element.hide("fadd_error_message");

					xhrPost("backend.php", this.attr('value'), (transport) => {
						try {

							try {
								var reply = JSON.parse(transport.responseText);
							} catch (e) {
								Element.hide("feed_add_spinner");
								alert(__("Failed to parse output. This can indicate server timeout and/or network issues. Backend output was logged to browser console."));
								console.log('quickAddFeed, backend returned:' + transport.responseText);
								return;
							}

							const rc = reply['result'];

							notify('');
							Element.hide("feed_add_spinner");

							console.log(rc);

							switch (parseInt(rc['code'])) {
								case 1:
									dialog.hide();
									notify_info(__("Subscribed to %s").replace("%s", feed_url));

									Feeds.reload();
									break;
								case 2:
									dialog.show_error(__("Specified URL seems to be invalid."));
									break;
								case 3:
									dialog.show_error(__("Specified URL doesn't seem to contain any feeds."));
									break;
								case 4:
									const feeds = rc['feeds'];

									Element.show("fadd_multiple_notify");

									const select = dijit.byId("feedDlg_feedContainerSelect");

									while (select.getOptions().length > 0)
										select.removeOption(0);

									select.addOption({value: '', label: __("Expand to select feed")});

									let count = 0;
									for (const feedUrl in feeds) {
										if (feeds.hasOwnProperty(feedUrl)) {
											select.addOption({value: feedUrl, label: feeds[feedUrl]});
											count++;
										}
									}

									Effect.Appear('feedDlg_feedsContainer', {duration: 0.5});

									break;
								case 5:
									dialog.show_error(__("Couldn't download the specified URL: %s").replace("%s", rc['message']));
									break;
								case 6:
									dialog.show_error(__("XML validation failed: %s").replace("%s", rc['message']));
									break;
								case 0:
									dialog.show_error(__("You are already subscribed to this feed."));
									break;
							}

						} catch (e) {
							console.error(transport.responseText);
							exception_error(e);
						}
					});
				}
			},
			href: query
		});

		dialog.show();
	},
	showFeedsWithErrors: function() {
		const query = {op: "pref-feeds", method: "feedsWithErrors"};

		if (dijit.byId("errorFeedsDlg"))
			dijit.byId("errorFeedsDlg").destroyRecursive();

		const dialog = new dijit.Dialog({
			id: "errorFeedsDlg",
			title: __("Feeds with update errors"),
			style: "width: 600px",
			getSelectedFeeds: function () {
				return getSelectedTableRowIds("prefErrorFeedList");
			},
			removeSelected: function () {
				const sel_rows = this.getSelectedFeeds();

				if (sel_rows.length > 0) {
					if (confirm(__("Remove selected feeds?"))) {
						notify_progress("Removing selected feeds...", true);

						const query = {
							op: "pref-feeds", method: "remove",
							ids: sel_rows.toString()
						};

						xhrPost("backend.php", query, () => {
							notify('');
							dialog.hide();
							Feeds.reload();
						});
					}

				} else {
					alert(__("No feeds are selected."));
				}
			},
			execute: function () {
				if (this.validate()) {
					//
				}
			},
			href: "backend.php?" + dojo.objectToQuery(query)
		});

		dialog.show();
	},
	feedBrowser: function() {
		const query = {op: "feeds", method: "feedBrowser"};

		if (dijit.byId("feedAddDlg"))
			dijit.byId("feedAddDlg").hide();

		if (dijit.byId("feedBrowserDlg"))
			dijit.byId("feedBrowserDlg").destroyRecursive();

		// noinspection JSUnusedGlobalSymbols
		const dialog = new dijit.Dialog({
			id: "feedBrowserDlg",
			title: __("More Feeds"),
			style: "width: 600px",
			getSelectedFeedIds: function () {
				const list = $$("#browseFeedList li[id*=FBROW]");
				const selected = [];

				list.each(function (child) {
					const id = child.id.replace("FBROW-", "");

					if (child.hasClassName('Selected')) {
						selected.push(id);
					}
				});

				return selected;
			},
			getSelectedFeeds: function () {
				const list = $$("#browseFeedList li.Selected");
				const selected = [];

				list.each(function (child) {
					const title = child.getElementsBySelector("span.fb_feedTitle")[0].innerHTML;
					const url = child.getElementsBySelector("a.fb_feedUrl")[0].href;

					selected.push([title, url]);

				});

				return selected;
			},

			subscribe: function () {
				const mode = this.attr('value').mode;
				let selected = [];

				if (mode == "1")
					selected = this.getSelectedFeeds();
				else
					selected = this.getSelectedFeedIds();

				if (selected.length > 0) {
					dijit.byId("feedBrowserDlg").hide();

					notify_progress("Loading, please wait...", true);

					const query = {
						op: "rpc", method: "massSubscribe",
						payload: JSON.stringify(selected), mode: mode
					};

					xhrPost("backend.php", query, () => {
						notify('');
						Feeds.reload();
					});

				} else {
					alert(__("No feeds are selected."));
				}

			},
			update: function () {
				Element.show('feed_browser_spinner');

				xhrPost("backend.php", dialog.attr("value"), (transport) => {
					notify('');

					Element.hide('feed_browser_spinner');

					const reply = JSON.parse(transport.responseText);
					const mode = reply['mode'];

					if ($("browseFeedList") && reply['content']) {
						$("browseFeedList").innerHTML = reply['content'];
					}

					dojo.parser.parse("browseFeedList");

					if (mode == 2) {
						Element.show(dijit.byId('feed_archive_remove').domNode);
					} else {
						Element.hide(dijit.byId('feed_archive_remove').domNode);
					}
				});
			},
			removeFromArchive: function () {
				const selected = this.getSelectedFeedIds();

				if (selected.length > 0) {
					if (confirm(__("Remove selected feeds from the archive? Feeds with stored articles will not be removed."))) {
						Element.show('feed_browser_spinner');

						const query = {op: "rpc", method: "remarchive", ids: selected.toString()};

						xhrPost("backend.php", query, () => {
							dialog.update();
						});
					}
				}
			},
			execute: function () {
				if (this.validate()) {
					this.subscribe();
				}
			},
			href: "backend.php?" + dojo.objectToQuery(query)
		});

		dialog.show();
	},
	addLabel: function(select, callback) {
		const caption = prompt(__("Please enter label caption:"), "");

		if (caption != undefined && caption.trim().length > 0) {

			const query = {op: "pref-labels", method: "add", caption: caption.trim()};

			if (select)
				Object.extend(query, {output: "select"});

			notify_progress("Loading, please wait...", true);

			xhrPost("backend.php", query, (transport) => {
				if (callback) {
					callback(transport);
				} else if (App.isPrefs()) {
					updateLabelList();
				} else {
					Feeds.reload();
				}
			});
		}
	},
	unsubscribeFeed: function(feed_id, title) {

		const msg = __("Unsubscribe from %s?").replace("%s", title);

		if (title == undefined || confirm(msg)) {
			notify_progress("Removing feed...");

			const query = {op: "pref-feeds", quiet: 1, method: "remove", ids: feed_id};

			xhrPost("backend.php", query, () => {
				if (dijit.byId("feedEditDlg")) dijit.byId("feedEditDlg").hide();

				if (App.isPrefs()) {
					Feeds.reload();
				} else {
					if (feed_id == Feeds.getActive())
						setTimeout(() => {
								Feeds.open({feed: -5})
							},
							100);

					if (feed_id < 0) Feeds.reload();
				}
			});
		}

		return false;
	},
	editFeed: function (feed) {
		if (feed <= 0)
			return alert(__("You can't edit this kind of feed."));

		const query = {op: "pref-feeds", method: "editfeed", id: feed};

		console.log("editFeed", query);

		if (dijit.byId("filterEditDlg"))
			dijit.byId("filterEditDlg").destroyRecursive();

		if (dijit.byId("feedEditDlg"))
			dijit.byId("feedEditDlg").destroyRecursive();

		const dialog = new dijit.Dialog({
			id: "feedEditDlg",
			title: __("Edit Feed"),
			style: "width: 600px",
			execute: function () {
				if (this.validate()) {
					notify_progress("Saving data...", true);

					xhrPost("backend.php", dialog.attr('value'), () => {
						dialog.hide();
						notify('');
						Feeds.reload();
					});
				}
			},
			href: "backend.php?" + dojo.objectToQuery(query)
		});

		dialog.show();
	},
	genUrlChangeKey: function(feed, is_cat) {
		if (confirm(__("Generate new syndication address for this feed?"))) {

			notify_progress("Trying to change address...", true);

			const query = {op: "pref-feeds", method: "regenFeedKey", id: feed, is_cat: is_cat};

			xhrJson("backend.php", query, (reply) => {
				const new_link = reply.link;
				const e = $('gen_feed_url');

				if (new_link) {
					e.innerHTML = e.innerHTML.replace(/&amp;key=.*$/,
						"&amp;key=" + new_link);

					e.href = e.href.replace(/&key=.*$/,
						"&key=" + new_link);

					new Effect.Highlight(e);

					notify('');

				} else {
					notify_error("Could not change feed URL.");
				}
			});
		}
		return false;
	}
};

function report_error(message, filename, lineno, colno, error) {
	exception_error(error, null, filename, lineno);
}

function exception_error(e, e_compat, filename, lineno, colno) {
	if (typeof e == "string") e = e_compat;

	if (!e) return; // no exception object, nothing to report.

	try {
		console.error(e);
		const msg = e.toString();

		try {
			xhrPost("backend.php",
				{op: "rpc", method: "log",
					file: e.fileName ? e.fileName : filename,
					line: e.lineNumber ? e.lineNumber : lineno,
					msg: msg, context: e.stack},
				(transport) => {
					console.warn(transport.responseText);
				});

		} catch (e) {
			console.error("Exception while trying to log the error.", e);
		}

		let content = "<div class='fatalError'><p>" + msg + "</p>";

		if (e.stack) {
			content += "<div><b>Stack trace:</b></div>" +
				"<textarea name=\"stack\" readonly=\"1\">" + e.stack + "</textarea>";
		}

		content += "</div>";

		content += "<div class='dlgButtons'>";

		content += "<button dojoType=\"dijit.form.Button\" "+
				"onclick=\"dijit.byId('exceptionDlg').hide()\">" +
				__('Close') + "</button>";
		content += "</div>";

		if (dijit.byId("exceptionDlg"))
			dijit.byId("exceptionDlg").destroyRecursive();

		const dialog = new dijit.Dialog({
			id: "exceptionDlg",
			title: "Unhandled exception",
			style: "width: 600px",
			content: content});

		dialog.show();

	} catch (ei) {
		console.error("Exception while trying to report an exception:", ei);
		console.error("Original exception:", e);

		alert("Exception occured while trying to report an exception.\n" +
			ei.stack + "\n\nOriginal exception:\n" + e.stack);
	}

}

function param_escape(arg) {
	return encodeURIComponent(arg);
}

function notify_real(msg, no_hide, n_type) {

	const n = $("notify");

	if (!n) return;

	if (notify_hide_timerid) {
		window.clearTimeout(notify_hide_timerid);
	}

	if (msg == "") {
		if (n.hasClassName("visible")) {
			notify_hide_timerid = window.setTimeout(function() {
				n.removeClassName("visible") }, 0);
		}
		return;
	}

	/* types:

		1 - generic
		2 - progress
		3 - error
		4 - info

	*/

	msg = "<span class=\"msg\"> " + __(msg) + "</span>";

	if (n_type == 2) {
		msg = "<span><img src=\""+getInitParam("icon_indicator_white")+"\"></span>" + msg;
		no_hide = true;
	} else if (n_type == 3) {
		msg = "<span><img src=\""+getInitParam("icon_alert")+"\"></span>" + msg;
	} else if (n_type == 4) {
		msg = "<span><img src=\""+getInitParam("icon_information")+"\"></span>" + msg;
	}

	msg += " <span><img src=\""+getInitParam("icon_cross")+"\" class=\"close\" title=\"" +
		__("Click to close") + "\" onclick=\"notify('')\"></span>";

	n.innerHTML = msg;

	window.setTimeout(function() {
		// goddamnit firefox
		if (n_type == 2) {
		n.className = "notify notify_progress visible";
			} else if (n_type == 3) {
			n.className = "notify notify_error visible";
			msg = "<span><img src='images/alert.png'></span>" + msg;
		} else if (n_type == 4) {
			n.className = "notify notify_info visible";
		} else {
			n.className = "notify visible";
		}

		if (!no_hide) {
			notify_hide_timerid = window.setTimeout(function() {
				n.removeClassName("visible") }, 5*1000);
		}

	}, 10);

}

function notify(msg, no_hide) {
	notify_real(msg, no_hide, 1);
}

function notify_progress(msg, no_hide) {
	notify_real(msg, no_hide, 2);
}

function notify_error(msg, no_hide) {
	notify_real(msg, no_hide, 3);

}

function notify_info(msg, no_hide) {
	notify_real(msg, no_hide, 4);
}

function setCookie(name, value, lifetime, path, domain, secure) {

	let d = false;

	if (lifetime) {
		d = new Date();
		d.setTime(d.getTime() + (lifetime * 1000));
	}

	console.log("setCookie: " + name + " => " + value + ": " + d);

	int_setCookie(name, value, d, path, domain, secure);

}

function int_setCookie(name, value, expires, path, domain, secure) {
	document.cookie= name + "=" + escape(value) +
		((expires) ? "; expires=" + expires.toGMTString() : "") +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "") +
		((secure) ? "; secure" : "");
}

function delCookie(name, path, domain) {
	if (getCookie(name)) {
		document.cookie = name + "=" +
		((path) ? ";path=" + path : "") +
		((domain) ? ";domain=" + domain : "" ) +
		";expires=Thu, 01-Jan-1970 00:00:01 GMT";
	}
}


function getCookie(name) {

	const dc = document.cookie;
	const prefix = name + "=";
	let begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) return null;
	}
	else {
		begin += 2;
	}
	let end = document.cookie.indexOf(";", begin);
	if (end == -1) {
		end = dc.length;
	}
	return unescape(dc.substring(begin + prefix.length, end));
}

function toggleSelectRowById(sender, id) {
	const row = $(id);
	return toggleSelectRow(sender, row);
}

/* this is for dijit Checkbox */
function toggleSelectListRow2(sender) {
	const row = sender.domNode.parentNode;
	return toggleSelectRow(sender, row);
}

/* this is for dijit Checkbox */
function toggleSelectRow2(sender, row, is_cdm) {

	if (!row)
		if (!is_cdm)
			row = sender.domNode.parentNode.parentNode;
		else
			row = sender.domNode.parentNode.parentNode.parentNode; // oh ffs

	if (sender.checked && !row.hasClassName('Selected'))
		row.addClassName('Selected');
	else
		row.removeClassName('Selected');

	if (typeof Headlines != "undefined")
		Headlines.updateSelectedPrompt();
}


function toggleSelectRow(sender, row) {

	if (!row) row = sender.parentNode.parentNode;

	if (sender.checked && !row.hasClassName('Selected'))
		row.addClassName('Selected');
	else
		row.removeClassName('Selected');

	if (typeof Headlines != "undefined")
		Headlines.updateSelectedPrompt();
}

// noinspection JSUnusedGlobalSymbols
function displayIfChecked(checkbox, elemId) {
	if (checkbox.checked) {
		Effect.Appear(elemId, {duration : 0.5});
	} else {
		Effect.Fade(elemId, {duration : 0.5});
	}
}

function getURLParam(param){
	return String(window.location.href).parseQuery()[param];
}

// noinspection JSUnusedGlobalSymbols
function closeInfoBox() {
	const dialog = dijit.byId("infoBox");

	if (dialog)	dialog.hide();

	return false;
}

function getInitParam(key) {
	return init_params[key];
}

function setInitParam(key, value) {
	init_params[key] = value;
}

function fatalError(code, msg, ext_info) {
	if (code == 6) {
		window.location.href = "index.php";
	} else if (code == 5) {
		window.location.href = "public.php?op=dbupdate";
	} else {

		if (msg == "") msg = "Unknown error";

		if (ext_info) {
			if (ext_info.responseText) {
				ext_info = ext_info.responseText;
			}
		}

		/* global ERRORS */
		if (ERRORS && ERRORS[code] && !msg) {
			msg = ERRORS[code];
		}

		let content = "<div><b>Error code:</b> " + code + "</div>" +
			"<p>" + msg + "</p>";

		if (ext_info) {
			content = content + "<div><b>Additional information:</b></div>" +
				"<textarea style='width: 100%' readonly=\"1\">" +
				ext_info + "</textarea>";
		}

		const dialog = new dijit.Dialog({
			title: "Fatal error",
			style: "width: 600px",
			content: content});

		dialog.show();

	}

	return false;

}

const Filters = {
	filterDlgCheckAction: function(sender) {
		const action = sender.value;

		const action_param = $("filterDlg_paramBox");

		if (!action_param) {
			console.log("filterDlgCheckAction: can't find action param box!");
			return;
		}

		// if selected action supports parameters, enable params field
		if (action == 4 || action == 6 || action == 7 || action == 9) {
			new Effect.Appear(action_param, {duration: 0.5});

			Element.hide(dijit.byId("filterDlg_actionParam").domNode);
			Element.hide(dijit.byId("filterDlg_actionParamLabel").domNode);
			Element.hide(dijit.byId("filterDlg_actionParamPlugin").domNode);

			if (action == 7) {
				Element.show(dijit.byId("filterDlg_actionParamLabel").domNode);
			} else if (action == 9) {
				Element.show(dijit.byId("filterDlg_actionParamPlugin").domNode);
			} else {
				Element.show(dijit.byId("filterDlg_actionParam").domNode);
			}

		} else {
			Element.hide(action_param);
		}
	},
	createNewRuleElement: function(parentNode, replaceNode) {
		const form = document.forms["filter_new_rule_form"];
		const query = {op: "pref-filters", method: "printrulename", rule: dojo.formToJson(form)};

		xhrPost("backend.php", query, (transport) => {
			try {
				const li = dojo.create("li");

				const cb = dojo.create("input", {type: "checkbox"}, li);

				new dijit.form.CheckBox({
					onChange: function () {
						this.domNode.up("li").toggleClassName("Selected");
					},
				}, cb);

				dojo.create("input", {
					type: "hidden",
					name: "rule[]",
					value: dojo.formToJson(form)
				}, li);

				dojo.create("span", {
					onclick: function () {
						dijit.byId('filterEditDlg').editRule(this);
					},
					innerHTML: transport.responseText
				}, li);

				if (replaceNode) {
					parentNode.replaceChild(li, replaceNode);
				} else {
					parentNode.appendChild(li);
				}
			} catch (e) {
				exception_error(e);
			}
		});
	},
	createNewActionElement: function(parentNode, replaceNode) {
		const form = document.forms["filter_new_action_form"];

		if (form.action_id.value == 7) {
			form.action_param.value = form.action_param_label.value;
		} else if (form.action_id.value == 9) {
			form.action_param.value = form.action_param_plugin.value;
		}

		const query = {
			op: "pref-filters", method: "printactionname",
			action: dojo.formToJson(form)
		};

		xhrPost("backend.php", query, (transport) => {
			try {
				const li = dojo.create("li");

				const cb = dojo.create("input", {type: "checkbox"}, li);

				new dijit.form.CheckBox({
					onChange: function () {
						this.domNode.up("li").toggleClassName("Selected");
					},
				}, cb);

				dojo.create("input", {
					type: "hidden",
					name: "action[]",
					value: dojo.formToJson(form)
				}, li);

				dojo.create("span", {
					onclick: function () {
						dijit.byId('filterEditDlg').editAction(this);
					},
					innerHTML: transport.responseText
				}, li);

				if (replaceNode) {
					parentNode.replaceChild(li, replaceNode);
				} else {
					parentNode.appendChild(li);
				}

			} catch (e) {
				exception_error(e);
			}
		});
	},
	addFilterRule: function(replaceNode, ruleStr) {
		if (dijit.byId("filterNewRuleDlg"))
			dijit.byId("filterNewRuleDlg").destroyRecursive();

		const query = "backend.php?op=pref-filters&method=newrule&rule=" +
			param_escape(ruleStr);

		const rule_dlg = new dijit.Dialog({
			id: "filterNewRuleDlg",
			title: ruleStr ? __("Edit rule") : __("Add rule"),
			style: "width: 600px",
			execute: function () {
				if (this.validate()) {
					Filters.createNewRuleElement($("filterDlg_Matches"), replaceNode);
					this.hide();
				}
			},
			href: query
		});

		rule_dlg.show();
	},
	addFilterAction: function(replaceNode, actionStr) {
		if (dijit.byId("filterNewActionDlg"))
			dijit.byId("filterNewActionDlg").destroyRecursive();

		const query = "backend.php?op=pref-filters&method=newaction&action=" +
			param_escape(actionStr);

		const rule_dlg = new dijit.Dialog({
			id: "filterNewActionDlg",
			title: actionStr ? __("Edit action") : __("Add action"),
			style: "width: 600px",
			execute: function () {
				if (this.validate()) {
					Filters.createNewActionElement($("filterDlg_Actions"), replaceNode);
					this.hide();
				}
			},
			href: query
		});

		rule_dlg.show();
	},
	editFilterTest: function(query) {

		if (dijit.byId("filterTestDlg"))
			dijit.byId("filterTestDlg").destroyRecursive();

		const test_dlg = new dijit.Dialog({
			id: "filterTestDlg",
			title: "Test Filter",
			style: "width: 600px",
			results: 0,
			limit: 100,
			max_offset: 10000,
			getTestResults: function (query, offset) {
				const updquery = query + "&offset=" + offset + "&limit=" + test_dlg.limit;

				console.log("getTestResults:" + offset);

				xhrPost("backend.php", updquery, (transport) => {
					try {
						const result = JSON.parse(transport.responseText);

						if (result && dijit.byId("filterTestDlg") && dijit.byId("filterTestDlg").open) {
							test_dlg.results += result.length;

							console.log("got results:" + result.length);

							$("prefFilterProgressMsg").innerHTML = __("Looking for articles (%d processed, %f found)...")
								.replace("%f", test_dlg.results)
								.replace("%d", offset);

							console.log(offset + " " + test_dlg.max_offset);

							for (let i = 0; i < result.length; i++) {
								const tmp = new Element("table");
								tmp.innerHTML = result[i];
								dojo.parser.parse(tmp);

								$("prefFilterTestResultList").innerHTML += tmp.innerHTML;
							}

							if (test_dlg.results < 30 && offset < test_dlg.max_offset) {

								// get the next batch
								window.setTimeout(function () {
									test_dlg.getTestResults(query, offset + test_dlg.limit);
								}, 0);

							} else {
								// all done

								Element.hide("prefFilterLoadingIndicator");

								if (test_dlg.results == 0) {
									$("prefFilterTestResultList").innerHTML = "<tr><td align='center'>No recent articles matching this filter have been found.</td></tr>";
									$("prefFilterProgressMsg").innerHTML = "Articles matching this filter:";
								} else {
									$("prefFilterProgressMsg").innerHTML = __("Found %d articles matching this filter:")
										.replace("%d", test_dlg.results);
								}

							}

						} else if (!result) {
							console.log("getTestResults: can't parse results object");

							Element.hide("prefFilterLoadingIndicator");

							notify_error("Error while trying to get filter test results.");

						} else {
							console.log("getTestResults: dialog closed, bailing out.");
						}
					} catch (e) {
						exception_error(e);
					}

				});
			},
			href: query
		});

		dojo.connect(test_dlg, "onLoad", null, function (e) {
			test_dlg.getTestResults(query, 0);
		});

		test_dlg.show();
	},
	quickAddFilter: function() {
		let query;

		if (!App.isPrefs()) {
			query = {
				op: "pref-filters", method: "newfilter",
				feed: Feeds.getActive(), is_cat: Feeds.activeIsCat()
			};
		} else {
			query = {op: "pref-filters", method: "newfilter"};
		}

		console.log('quickAddFilter', query);

		if (dijit.byId("feedEditDlg"))
			dijit.byId("feedEditDlg").destroyRecursive();

		if (dijit.byId("filterEditDlg"))
			dijit.byId("filterEditDlg").destroyRecursive();

		const dialog = new dijit.Dialog({
			id: "filterEditDlg",
			title: __("Create Filter"),
			style: "width: 600px",
			test: function () {
				const query = "backend.php?" + dojo.formToQuery("filter_new_form") + "&savemode=test";

				Filters.editFilterTest(query);
			},
			selectRules: function (select) {
				$$("#filterDlg_Matches input[type=checkbox]").each(function (e) {
					e.checked = select;
					if (select)
						e.parentNode.addClassName("Selected");
					else
						e.parentNode.removeClassName("Selected");
				});
			},
			selectActions: function (select) {
				$$("#filterDlg_Actions input[type=checkbox]").each(function (e) {
					e.checked = select;

					if (select)
						e.parentNode.addClassName("Selected");
					else
						e.parentNode.removeClassName("Selected");

				});
			},
			editRule: function (e) {
				const li = e.parentNode;
				const rule = li.getElementsByTagName("INPUT")[1].value;
				Filters.addFilterRule(li, rule);
			},
			editAction: function (e) {
				const li = e.parentNode;
				const action = li.getElementsByTagName("INPUT")[1].value;
				Filters.addFilterAction(li, action);
			},
			addAction: function () {
				Filters.addFilterAction();
			},
			addRule: function () {
				Filters.addFilterRule();
			},
			deleteAction: function () {
				$$("#filterDlg_Actions li[class*=Selected]").each(function (e) {
					e.parentNode.removeChild(e)
				});
			},
			deleteRule: function () {
				$$("#filterDlg_Matches li[class*=Selected]").each(function (e) {
					e.parentNode.removeChild(e)
				});
			},
			execute: function () {
				if (this.validate()) {

					const query = dojo.formToQuery("filter_new_form");

					xhrPost("backend.php", query, () => {
						if (App.isPrefs()) {
							updateFilterList();
						}

						dialog.hide();
					});
				}
			},
			href: "backend.php?" + dojo.objectToQuery(query)
		});

		if (!App.isPrefs()) {
			const selectedText = getSelectionText();

			const lh = dojo.connect(dialog, "onLoad", function () {
				dojo.disconnect(lh);

				if (selectedText != "") {

					const feed_id = Feeds.activeIsCat() ? 'CAT:' + parseInt(Feeds.getActive()) :
						Feeds.getActive();

					const rule = {reg_exp: selectedText, feed_id: [feed_id], filter_type: 1};

					Filters.addFilterRule(null, dojo.toJson(rule));

				} else {

					const query = {op: "rpc", method: "getlinktitlebyid", id: Article.getActive()};

					xhrPost("backend.php", query, (transport) => {
						const reply = JSON.parse(transport.responseText);

						let title = false;

						if (reply && reply.title) title = reply.title;

						if (title || Feeds.getActive() || Feeds.activeIsCat()) {

							console.log(title + " " + Feeds.getActive());

							const feed_id = Feeds.activeIsCat() ? 'CAT:' + parseInt(Feeds.getActive()) :
								Feeds.getActive();

							const rule = {reg_exp: title, feed_id: [feed_id], filter_type: 1};

							Filters.addFilterRule(null, dojo.toJson(rule));
						}
					});
				}
			});
		}

		dialog.show();
	},
};

/* function strip_tags(s) {
	return s.replace(/<\/?[^>]+(>|$)/g, "");
} */

// noinspection JSUnusedGlobalSymbols
function uploadIconHandler(rc) {
	switch (rc) {
		case 0:
			notify_info("Upload complete.");
			if (App.isPrefs()) {
				Feeds.reload();
			} else {
				setTimeout('Feeds.reload(false, false)', 50);
			}
			break;
		case 1:
			notify_error("Upload failed: icon is too big.");
			break;
		case 2:
			notify_error("Upload failed.");
			break;
	}
}

// noinspection JSUnusedGlobalSymbols
function removeFeedIcon(id) {
	if (confirm(__("Remove stored feed icon?"))) {

		notify_progress("Removing feed icon...", true);

		const query = { op: "pref-feeds", method: "removeicon", feed_id: id };

		xhrPost("backend.php", query, () => {
			notify_info("Feed icon removed.");
			if (App.isPrefs()) {
				Feeds.reload();
			} else {
				setTimeout('Feeds.reload(false, false)', 50);
			}
		});
	}

	return false;
}

// noinspection JSUnusedGlobalSymbols
function uploadFeedIcon() {
	const file = $("icon_file");

	if (file.value.length == 0) {
		alert(__("Please select an image file to upload."));
	} else if (confirm(__("Upload new icon for this feed?"))) {
			notify_progress("Uploading, please wait...", true);
			return true;
		}

	return false;
}

// mode = all, none, invert
function selectTableRows(id, mode) {
	const rows = $(id).rows;

	for (let i = 0; i < rows.length; i++) {
		const row = rows[i];
		let cb = false;
		let dcb = false;

		if (row.id && row.className) {
			const bare_id = row.id.replace(/^[A-Z]*?-/, "");
			const inputs = rows[i].getElementsByTagName("input");

			for (let j = 0; j < inputs.length; j++) {
				const input = inputs[j];

				if (input.getAttribute("type") == "checkbox" &&
						input.id.match(bare_id)) {

					cb = input;
					dcb = dijit.getEnclosingWidget(cb);
					break;
				}
			}

			if (cb || dcb) {
				const issel = row.hasClassName("Selected");

				if (mode == "all" && !issel) {
					row.addClassName("Selected");
					cb.checked = true;
					if (dcb) dcb.set("checked", true);
				} else if (mode == "none" && issel) {
					row.removeClassName("Selected");
					cb.checked = false;
					if (dcb) dcb.set("checked", false);

				} else if (mode == "invert") {

					if (issel) {
						row.removeClassName("Selected");
						cb.checked = false;
						if (dcb) dcb.set("checked", false);
					} else {
						row.addClassName("Selected");
						cb.checked = true;
						if (dcb) dcb.set("checked", true);
					}
				}
			}
		}
	}
}

function getSelectedTableRowIds(id) {
	const rows = [];

	const elem_rows = $(id).rows;

	for (let i = 0; i < elem_rows.length; i++) {
		if (elem_rows[i].hasClassName("Selected")) {
			const bare_id = elem_rows[i].id.replace(/^[A-Z]*?-/, "");
			rows.push(bare_id);
		}
	}

	return rows;
}

// noinspection JSUnusedGlobalSymbols
function label_to_feed_id(label) {
	return _label_base_index - 1 - Math.abs(label);
}

// noinspection JSUnusedGlobalSymbols
function feed_to_label_id(feed) {
	return _label_base_index - 1 + Math.abs(feed);
}

// http://stackoverflow.com/questions/6251937/how-to-get-selecteduser-highlighted-text-in-contenteditable-element-and-replac
function getSelectionText() {
	let text = "";

	if (typeof window.getSelection != "undefined") {
		const sel = window.getSelection();
		if (sel.rangeCount) {
			const container = document.createElement("div");
			for (let i = 0, len = sel.rangeCount; i < len; ++i) {
				container.appendChild(sel.getRangeAt(i).cloneContents());
			}
			text = container.innerHTML;
		}
	} else if (typeof document.selection != "undefined") {
		if (document.selection.type == "Text") {
			text = document.selection.createRange().textText;
		}
	}

	return text.stripTags();
}

// noinspection JSUnusedGlobalSymbols
function popupOpenUrl(url) {
	const w = window.open("");

	w.opener = null;
	w.location = url;
}

// noinspection JSUnusedGlobalSymbols
function popupOpenArticle(id) {
	const w = window.open("",
		"ttrss_article_popup",
		"height=900,width=900,resizable=yes,status=no,location=no,menubar=no,directories=no,scrollbars=yes,toolbar=no");

	w.opener = null;
	w.location = "backend.php?op=article&method=view&mode=raw&html=1&zoom=1&id=" + id + "&csrf_token=" + getInitParam("csrf_token");
}