/* global __dirname, process */

const {
    BrowserWindow,
    Menu,
    app,
    shell
} = require('electron');
const isDev = require('electron-is-dev');
const { autoUpdater } = require('electron-updater');
const windowStateKeeper = require('electron-window-state');
const {
    initPopupsConfigurationMain,
    getPopupTarget,
    setupAlwaysOnTopMain
} = require('jitsi-meet-electron-utils');
const path = require('path');
const URL = require('url');

autoUpdater.logger = require('electron-log');
autoUpdater.logger.transports.file.level = 'info';

/**
 * Load debug utilities (don't open the DevTools window by default though).
 */
require('electron-debug')({ showDevTools: false });

/**
 * The window object that will load the iframe with Jitsi Meet.
 * IMPORTANT: Must be defined as global in order to not be garbage collected
 * acidentally.
 */
let mainWindow = null;

/**
 * Sets the application menu. It is hidden on all platforms except macOS because
 * otherwise copy and paste functionality is not available.
 */
function setApplicationMenu() {
    if (process.platform === 'darwin') {
        const template = [ {
            label: app.getName(),
            submenu: [ {
                label: 'Quit',
                accelerator: 'Command+Q',
                click() {
                    app.quit();
                }
            } ]
        }, {
            label: 'Edit',
            submenu: [ {
                label: 'Undo',
                accelerator: 'CmdOrCtrl+Z',
                selector: 'undo:'
            },
            {
                label: 'Redo',
                accelerator: 'Shift+CmdOrCtrl+Z',
                selector: 'redo:'
            },
            {
                type: 'separator'
            },
            {
                label: 'Cut',
                accelerator: 'CmdOrCtrl+X',
                selector: 'cut:'
            },
            {
                label: 'Copy',
                accelerator: 'CmdOrCtrl+C',
                selector: 'copy:'
            },
            {
                label: 'Paste',
                accelerator: 'CmdOrCtrl+V',
                selector: 'paste:'
            },
            {
                label: 'Select All',
                accelerator: 'CmdOrCtrl+A',
                selector: 'selectAll:'
            }
            ]
        } ];

        Menu.setApplicationMenu(Menu.buildFromTemplate(template));
    } else {
        Menu.setApplicationMenu(null);
    }
}

/**
 * Opens new window with index.html(Jitsi Meet is loaded in iframe there).
 */
function createJitsiMeetWindow() {
    // Application menu.
    setApplicationMenu();

    // Check for Updates.
    autoUpdater.checkForUpdatesAndNotify();

    // Load the previous window state with fallback to defaults.
    const windowState = windowStateKeeper({
        defaultWidth: 800,
        defaultHeight: 600
    });

    // Path to root directory.
    const basePath = isDev ? __dirname : app.getAppPath();

    // URL for index.html which will be our entry point.
    const indexURL = URL.format({
        pathname: path.resolve(basePath, './build/index.html'),
        protocol: 'file:',
        slashes: true
    });

    // Options used when creating the main Jitsi Meet window.
    const options = {
        x: windowState.x,
        y: windowState.y,
        width: windowState.width,
        height: windowState.height,
        icon: path.resolve(basePath, './resources/icons/icon_512x512.png'),
        minWidth: 800,
        minHeight: 600,
        show: false,
        titleBarStyle: 'hidden',
        webPreferences: {
            nativeWindowOpen: true
        }
    };

    mainWindow = new BrowserWindow(options);
    windowState.manage(mainWindow);
    mainWindow.loadURL(indexURL);

    initPopupsConfigurationMain(mainWindow);
    setupAlwaysOnTopMain(mainWindow);

    mainWindow.webContents.on('new-window', (event, url, frameName) => {
        const target = getPopupTarget(url, frameName);

        if (!target || target === 'browser') {
            event.preventDefault();
            shell.openExternal(url);
        }
    });
    mainWindow.on('closed', () => {
        mainWindow = null;
    });
    mainWindow.once('ready-to-show', () => {
        mainWindow.show();
    });
}

/**
 * Force Single Instance Application.
 */
const isSecondInstance = app.makeSingleInstance(() => {
    /**
     * If someone creates second instance of the application, set focus on
     * existing window.
     */
    if (mainWindow) {
        if (mainWindow.isMinimized()) {
            mainWindow.restore();
        }
        mainWindow.focus();
    }
});

if (isSecondInstance) {
    app.quit();
    process.exit(0);
}

/**
 * Run the application.
 */
app.on('activate', () => {
    if (mainWindow === null) {
        createJitsiMeetWindow();
    }
});
app.on('certificate-error',
    // eslint-disable-next-line max-params
    (event, webContents, url, error, certificate, callback) => {
        if (url.startsWith('https://localhost')) {
            event.preventDefault();
            callback(true);
        } else {
            callback(false);
        }
    }
);
app.on('ready', createJitsiMeetWindow);
app.on('window-all-closed', () => {
    // Don't quit the application for macOS.
    if (process.platform !== 'darwin') {
        app.quit();
    }
});