const { app, BrowserWindow, Tray, Menu, shell } = require('electron');
const path = require('path');

const TARGET_URL = 'https://www.rvv.de';

let mainWindow = null;
let tray = null;

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 414,
    height: 896,
    title: 'RVV',
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false,
    },
  });

  mainWindow.loadURL(TARGET_URL);

  // Minimize to tray instead of closing
  mainWindow.on('close', (event) => {
    if (!app.isQuitting) {
      event.preventDefault();
      mainWindow.hide();
    }
  });

  // Open external links in the system browser
  mainWindow.webContents.setWindowOpenHandler(({ url }) => {
    const targetHost = new URL(TARGET_URL).host;
    const linkHost = new URL(url).host;
    if (!linkHost.endsWith(targetHost)) {
      shell.openExternal(url);
      return { action: 'deny' };
    }
    return { action: 'allow' };
  });

  // Handle navigation to external sites
  mainWindow.webContents.on('will-navigate', (event, url) => {
    const targetHost = new URL(TARGET_URL).host;
    try {
      const linkHost = new URL(url).host;
      if (!linkHost.endsWith(targetHost)) {
        event.preventDefault();
        shell.openExternal(url);
      }
    } catch {
      // allow navigation if URL parsing fails
    }
  });

  // Show fallback page if the site fails to load
  mainWindow.webContents.on('did-fail-load', (_event, _code, _desc, url) => {
    if (url.startsWith(TARGET_URL)) {
      mainWindow.loadFile('fallback.html');
    }
  });
}

function createTray() {
  tray = new Tray(path.join(__dirname, 'rvv-icon.png'));

  const contextMenu = Menu.buildFromTemplate([
    {
      label: 'Show RVV',
      click: () => {
        mainWindow.show();
      },
    },
    { type: 'separator' },
    {
      label: 'Quit',
      click: () => {
        app.isQuitting = true;
        app.quit();
      },
    },
  ]);

  tray.setToolTip('RVV');
  tray.setContextMenu(contextMenu);

  // Click on tray icon shows the window
  tray.on('click', () => {
    mainWindow.show();
  });
}

app.whenReady().then(() => {
  createWindow();
  createTray();

  app.on('activate', () => {
    if (BrowserWindow.getAllWindows().length === 0) {
      createWindow();
    } else {
      mainWindow.show();
    }
  });
});

app.on('window-all-closed', () => {
  // Don't quit on window close — we live in the tray
});