// 使用 CommonJS 格式
const { app, BrowserWindow, ipcMain, shell } = require('electron');
const { join } = require('path');

let mainWindow: typeof BrowserWindow.prototype | null = null;

const VITE_DEV_SERVER_URL = process.env.VITE_DEV_SERVER_URL;

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1400,
    height: 900,
    minWidth: 1200,
    minHeight: 700,
    webPreferences: {
      preload: join(__dirname, 'preload.js'),
      nodeIntegration: false,
      contextIsolation: true,
    },
    titleBarStyle: 'hiddenInset',
    frame: process.platform !== 'darwin',
    show: false,
  });

  // 窗口准备好后再显示，避免白屏
  mainWindow.once('ready-to-show', () => {
    mainWindow?.show();
  });

  // 加载页面
  if (VITE_DEV_SERVER_URL) {
    mainWindow.loadURL(VITE_DEV_SERVER_URL);
    mainWindow.webContents.openDevTools();
  } else {
    mainWindow.loadFile(join(__dirname, '../dist/index.html'));
  }

  // 处理外部链接
  mainWindow.webContents.setWindowOpenHandler(({ url }: { url: string }) => {
    shell.openExternal(url);
    return { action: 'deny' };
  });

  mainWindow.on('closed', () => {
    mainWindow = null;
  });
}

// 单实例锁定
const gotTheLock = app.requestSingleInstanceLock();

if (!gotTheLock) {
  app.quit();
} else {
  app.on('second-instance', () => {
    if (mainWindow) {
      if (mainWindow.isMinimized()) mainWindow.restore();
      mainWindow.focus();
    }
  });

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

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

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
});

// IPC 处理
ipcMain.handle('get-app-version', () => {
  return app.getVersion();
});

ipcMain.handle('get-platform', () => {
  return process.platform;
});

// 窗口控制
ipcMain.on('window-minimize', () => {
  mainWindow?.minimize();
});

ipcMain.on('window-maximize', () => {
  if (mainWindow?.isMaximized()) {
    mainWindow.unmaximize();
  } else {
    mainWindow?.maximize();
  }
});

ipcMain.on('window-close', () => {
  mainWindow?.close();
});