const electron = require('electron');
const { app, BrowserWindow, ipcMain, shell, session, nativeTheme } = require('electron');
const { is, fixPathForAsarUnpack } = require('electron-util');
const { download } = require('electron-dl');
const path = require('path');
const os = require('os');
const storage = require('electron-json-storage');
const fs = require('fs');
const readChunk = require('read-chunk');
const fileType = require('file-type');
const port = process.env.SERVER_PORT;
const keytar = require('keytar');
const bindings = require('bindings');
const envPath = path.join(__dirname, 'electron', 'env.json');
const systemVersion = process.getSystemVersion();
const protocol = 'anytype';
const remote = require('@electron/remote/main');

const userPath = app.getPath('userData');
const tmpPath = path.join(userPath, 'tmp');
const binPath = fixPathForAsarUnpack(path.join(__dirname, 'dist', `anytypeHelper${is.windows ? '.exe' : ''}`));

const ConfigManager = require('./electron/js/config.js');
const UpdateManager = require('./electron/js/updater.js');
const MenuManager = require('./electron/js/menu.js');
const WindowManager = require('./electron/js/window.js');
const Server = require('./electron/js/server.js');
const Util = require('./electron/js/util.js');

const KEYTAR_SERVICE = 'Anytype';

app.removeAsDefaultProtocolClient(protocol);
Util.setAppPath(path.join(__dirname));
WindowManager.exit = exit;

if (process.defaultApp) {
	if (process.argv.length >= 2) {
		app.setAsDefaultProtocolClient(protocol, process.execPath, [ path.resolve(process.argv[1]) ]);
	};
} else {
	app.setAsDefaultProtocolClient(protocol);
};

try { env = JSON.parse(fs.readFileSync(envPath)); } catch (e) {};

remote.initialize();

let env = {};
let deeplinkingUrl = '';
let waitLibraryPromise;
let dataPath = [];
let mainWindow = null;
let csp = [
	"default-src 'self' 'unsafe-eval'",
	"img-src 'self' http://*:* https://*:* data: blob: file://*",
	"media-src 'self' http://*:* https://*:* data: blob: file://*",
	"style-src 'unsafe-inline' http://localhost:* file://*",
	"font-src data: file://*",
	"connect-src http://localhost:* http://127.0.0.1:* ws://localhost:* https://sentry.anytype.io https://anytype.io https://api.amplitude.com/ devtools://devtools data: https://*.wistia.com https://*.wistia.net https://embedwistia-a.akamaihd.net",
	"script-src-elem file: http://localhost:* https://sentry.io devtools://devtools 'unsafe-inline' https://*.wistia.com https://*.wistia.net",
	"frame-src chrome-extension://react-developer-tools"
];

if (is.development && !port) {
	console.error('ERROR: Please define SERVER_PORT env var');
	exit(false);
};

if (app.isPackaged && !app.requestSingleInstanceLock()) {
	exit(false);
};

storage.setDataPath(userPath);
Util.mkDir(tmpPath);

if (process.env.DATA_PATH) {
	Util.mkDir(process.env.DATA_PATH);
	dataPath.push(process.env.DATA_PATH);
} else {
	dataPath.push(userPath);
	if (!app.isPackaged) {
		dataPath.push('dev');
	};
	dataPath.push('data');
};

if (process.env.ANYTYPE_USE_SIDE_SERVER) {
	// use the grpc server started from the outside
	Server.setAddress(process.env.ANYTYPE_USE_SIDE_SERVER);
	waitLibraryPromise = Promise.resolve();
} else {
	waitLibraryPromise = Server.start(binPath, userPath);
};

function waitForLibraryAndCreateWindows () {
	waitLibraryPromise.then((res) => {
		global.serverAddr = Server.getAddress();
		createMainWindow();
	}, (err) => {
		electron.dialog.showErrorBox('Error: failed to run server', err.toString());
	});
};

nativeTheme.on('updated', () => {
	MenuManager.updateTrayIcon();
	Util.send(mainWindow, 'native-theme', Util.isDarkTheme());
});

function createMainWindow () {
	mainWindow = WindowManager.createMain({ withState: true });

	mainWindow.once('ready-to-show', () => {
		mainWindow.show();

		if (deeplinkingUrl) {
			Util.send(mainWindow, 'route', Util.getRouteFromUrl(deeplinkingUrl));
		};
	});

	if (process.env.ELECTRON_DEV_EXTENSIONS) {
		BrowserWindow.addDevToolsExtension(
			path.join(os.homedir(), '/Library/Application Support/Google/Chrome/Default/Extensions/fmkadmapgofadopljbjfkapdkoienihi/4.6.0_0')
		);
	};

	registerIpcEvents(mainWindow);

	UpdateManager.init(mainWindow);
	UpdateManager.exit = exit;

	MenuManager.exit = exit;
	MenuManager.setConfig = setConfig;
	MenuManager.setChannel = (channel) => {
		if (!UpdateManager.isUpdating) {
			setConfig({ channel: channel }, (error) => { 
				UpdateManager.setChannel(channel); 
			});
		};
	};
	MenuManager.initMenu(mainWindow);
	MenuManager.initTray(mainWindow);
};

function createChildWindow (route) {
	const win = WindowManager.createMain({ withState: false });

	win.once('ready-to-show', () => {
		win.show();

		if (route) {
			Util.send(win, 'route', route);
		};
	});

	registerIpcEvents(win);
};

function registerIpcEvents (win) {
	ipcMain.on('appLoaded', () => { Util.send(win, 'init', dataPath.join('/'), ConfigManager.config, Util.isDarkTheme()); });
	ipcMain.on('exit', (e, relaunch) => { exit(relaunch); });
	ipcMain.on('shutdown', (e, relaunch) => { shutdown(relaunch); });
	ipcMain.on('configSet', (e, config) => { setConfig(config); });

	ipcMain.on('keytarSet', (e, key, value) => {
		if (key && value) {
			keytar.setPassword(KEYTAR_SERVICE, key, value);
		};
	});
	ipcMain.on('keytarGet', (e, key) => {
		keytar.getPassword(KEYTAR_SERVICE, key).then((value) => { Util.send(win, 'keytarGet', key, value); });
	});
	ipcMain.on('keytarDelete', (e, key) => { keytar.deletePassword(KEYTAR_SERVICE, key); });

	ipcMain.on('updateDownload', (e) => { UpdateManager.download(); });
	ipcMain.on('updateConfirm', (e) => { exit(true); }); 
	ipcMain.on('updateCancel', (e) => { UpdateManager.cancel(); });

	ipcMain.on('urlOpen', async (e, v) => { shell.openExternal(v); });
	ipcMain.on('pathOpen', async (e, v) => { shell.openPath(v); });
	ipcMain.on('windowOpen', (e, v) => { createChildWindow(v); });

	ipcMain.on('download', async (e, url) => { await download(win, url, { saveAs: true }); });

	ipcMain.on('proxyEvent', function () {
		let args = Object.values(arguments);

		args.shift();
		send.apply(this, args);
	});

	ipcMain.on('winCommand', (e, cmd, param) => { WindowManager.command(win, cmd, param); });
};

function setConfig (obj, callBack) {
	ConfigManager.set(obj, (err) => {
		Util.send(mainWindow, 'config', ConfigManager.config);

		if (callBack) {
			callBack(err);
		};
	});
};

app.on('ready', () => {
	session.defaultSession.webRequest.onHeadersReceived((details, callback) => {
		callback({
			responseHeaders: {
				...details.responseHeaders,
				'Content-Security-Policy': [ csp.join('; ') ]
			}
		})
	});

	ConfigManager.init(waitForLibraryAndCreateWindows);
});

app.on('second-instance', (event, argv, cwd) => {
	Util.log('info', 'second-instance');

	if (!is.macos) {
		deeplinkingUrl = argv.find((arg) => arg.startsWith(`${protocol}://`));
		if (deeplinkingUrl) {
			Util.send(mainWindow, 'route', Util.getRouteFromUrl(deeplinkingUrl));
		};
	};

	if (mainWindow) {
		if (mainWindow.isMinimized()) {
			mainWindow.restore();
		};

		mainWindow.show();
		mainWindow.focus();
	};
});

app.on('window-all-closed', (e) => {
	Util.log('info', 'window-all-closed');

	if (is.linux) {
		e.preventDefault();
		exit(false);
	};
});

app.on('before-quit', (e) => {
	Util.log('info', 'before-quit');

	if (app.isQuiting) {
		app.exit(0);
	} else {
		e.preventDefault();
		exit(false);
	};
});

app.on('activate', () => { mainWindow ? mainWindow.show() : createMainWindow(); });

app.on('open-url', (e, url) => {
	e.preventDefault();

	if (mainWindow) {
		Util.send(mainWindow, 'route', Util.getRouteFromUrl(url));
		mainWindow.show();
	};
});

function shutdown (relaunch) {
	Util.log('info', 'AppShutdown, relaunch: ' + relaunch);

	if (relaunch) {
		UpdateManager.relaunch();
	} else {
		app.exit(0);
	};
};

function exit (relaunch) {
	if (app.isQuiting) {
		return;
	};

	Util.log('info', 'MW shutdown is starting, relaunch: ' + relaunch);
	Util.send(mainWindow, 'shutdownStart');

	Server.stop().then(()=>{
		Util.log('info', 'MW shutdown complete');
		shutdown(relaunch);
	});
};