main.js

const { app, BrowserWindow, ipcMain, globalShortcut } = require('electron');
const path = require('path');
const fs = require('fs');

const CONFIG_PATH = path.join(app.getPath('userData'), 'config.json');

const DEFAULT_CONFIG = {
  // Appearance
  fontSize: 34,
  lineHeight: 1.7,
  opacity: 0.85,
  textColor: '#ffffff',
  bgColor: '#000000',
  visibleLines: 3,
  fontFamily: 'system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Noto Sans CJK SC", "Noto Sans JP", "Noto Sans KR", "Apple Color Emoji", "Segoe UI Emoji", sans-serif',
  mirror: false,
  language: 'en',
  direction: 'auto',
  // Behavior
  scrollSpeed: 40,
  contentProtection: true,
  arrowControl: true,
  // Window position
  bounds: null,
  // Script
  script: '',
  pageDelimiter: '\\n\\n'
};

function loadConfig() {
  try {
    const raw = fs.readFileSync(CONFIG_PATH, 'utf-8');
    return Object.assign({}, DEFAULT_CONFIG, JSON.parse(raw));
  } catch {
    return Object.assign({}, DEFAULT_CONFIG);
  }
}

function saveConfig(cfg) {
  try {
    fs.writeFileSync(CONFIG_PATH, JSON.stringify(cfg, null, 2), 'utf-8');
  } catch (e) {
    console.error('Failed to save config', e);
  }
}

let config = loadConfig();
let prompterWin = null;
let controlWin = null;
let locked = false; // Locked mode: mouse clicks pass through the prompter.

function createPrompter() {
  const b = config.bounds;
  prompterWin = new BrowserWindow({
    width: b ? b.width : 720,
    height: b ? b.height : 240,
    x: b ? b.x : undefined,
    y: b ? b.y : undefined,
    frame: false,
    transparent: true,
    alwaysOnTop: true,
    skipTaskbar: true,
    resizable: true,
    focusable: false,
    hasShadow: false,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false
    }
  });

  prompterWin.setAlwaysOnTop(true, 'screen-saver');
  prompterWin.setVisibleOnAllWorkspaces(true, { visibleOnFullScreen: true });
  applyContentProtection();
  prompterWin.loadFile('prompter.html');

  prompterWin.on('moved', persistBounds);
  prompterWin.on('resized', persistBounds);
}

function persistBounds() {
  if (!prompterWin) return;
  config.bounds = prompterWin.getBounds();
  saveConfig(config);
}

function applyContentProtection() {
  if (prompterWin) prompterWin.setContentProtection(!!config.contentProtection);
}

function createControl() {
  controlWin = new BrowserWindow({
    width: 420,
    height: 680,
    title: 'Presentation Prompter Controls',
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      contextIsolation: true,
      nodeIntegration: false
    }
  });
  controlWin.loadFile('control.html');
  controlWin.on('closed', () => { controlWin = null; });
}

function sendToPrompter(channel, payload) {
  if (prompterWin && !prompterWin.isDestroyed()) {
    prompterWin.webContents.send(channel, payload);
  }
}

function toggleLock() {
  locked = !locked;
  if (prompterWin) {
    prompterWin.setIgnoreMouseEvents(locked, { forward: true });
  }
  sendToPrompter('lock-changed', locked);
}

function registerShortcuts() {
  globalShortcut.unregisterAll();
  const M = 'CommandOrControl';
  if (config.arrowControl) {
    globalShortcut.register('Down', () => sendToPrompter('cmd', 'nextLine'));
    globalShortcut.register('Up',   () => sendToPrompter('cmd', 'prevLine'));
  }
  globalShortcut.register(`${M}+Shift+Space`, () => sendToPrompter('cmd', 'togglePlay'));
  globalShortcut.register(`${M}+Shift+Down`, () => sendToPrompter('cmd', 'faster'));
  globalShortcut.register(`${M}+Shift+Up`,   () => sendToPrompter('cmd', 'slower'));
  globalShortcut.register(`${M}+Shift+L`, () => toggleLock());
  globalShortcut.register(`${M}+Shift+H`, () => { if (prompterWin) prompterWin.isVisible() ? prompterWin.hide() : prompterWin.show(); });
  globalShortcut.register(`${M}+Shift+Q`, () => app.quit());
}

app.whenReady().then(() => {
  createPrompter();
  createControl();
  registerShortcuts();
  sendToPrompter('config', config);
});

app.on('will-quit', () => globalShortcut.unregisterAll());
app.on('window-all-closed', () => app.quit());

// ---- IPC ----
ipcMain.handle('get-config', () => config);

ipcMain.on('set-config', (_e, partial) => {
  config = Object.assign({}, config, partial);
  saveConfig(config);
  applyContentProtection();
  if ('arrowControl' in partial) registerShortcuts();
  sendToPrompter('config', config);
});

ipcMain.on('toggle-lock', () => toggleLock());

ipcMain.on('open-control', () => {
  if (controlWin) controlWin.focus(); else createControl();
});

ipcMain.on('quit-app', () => app.quit());

ipcMain.on('set-ignore-mouse', (_e, ignore) => {
  if (prompterWin) prompterWin.setIgnoreMouseEvents(ignore, { forward: true });
});