// 确保所有导入都使用 ES 模块语法
import { app, BrowserWindow, ipcMain } from 'electron';
import path from 'path';
import { fileURLToPath } from 'url';
import { checkDatabaseInitialized, initializeDatabase } from './db/index.js';
// 导入配置项服务
import {
  fetchAllConfigs,
  fetchConfigById,
  saveConfig,
  removeConfig,
  getSystemConfig,
  updateSystemConfig,
  increaseQuestionBandVersion,
  initAuthIpc
} from './service/configService.js';

// 定义 __dirname 和 __filename
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

// 确保在应用最开始处添加单实例锁检查
// 尝试获取单实例锁
const gotTheLock = app.requestSingleInstanceLock();

// 如果获取锁失败，说明已有实例在运行，直接退出
if (!gotTheLock) {
  app.quit();
} else {
  // 设置第二个实例启动时的处理
  app.on('second-instance', (event, commandLine, workingDirectory) => {
    // 当用户尝试启动第二个实例时，聚焦到已有的主窗口
    const mainWindow = BrowserWindow.getAllWindows()[0];
    if (mainWindow) {
      if (mainWindow.isMinimized()) mainWindow.restore();
      mainWindow.focus();
    }
  });
}

function createWindow() {
  const mainWindow = new BrowserWindow({
    fullscreen: true,
    webPreferences: {
      preload: path.join(__dirname, 'preload.js'),
      nodeIntegration: false,
      contextIsolation: true
    }
  })

  if (process.env.NODE_ENV === 'development') {
    mainWindow.loadURL('http://localhost:5173/')
    mainWindow.webContents.openDevTools()
  } else {
    mainWindow.loadFile(path.join(__dirname, '../dist/index.html'))
  }
}

// Initalize app
app.whenReady().then(() => {
  setupApp()
  createWindow()
  setupIpcMain()
})

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

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

// Check database initialization status
async function setupApp() {
    try {
        console.log('应用启动 - 检查数据库初始化状态...');

        // 使用全局变量防止重复初始化检查
        if (global.dbInitCheck) {
            console.log('数据库初始化检查已完成');
            return;
        }
        global.dbInitCheck = true;

        const isInitialized = await checkDatabaseInitialized();
        console.log('数据库初始化状态:', isInitialized);

        // 只检查状态，不自动初始化
    } catch (error) {
        console.error('数据库检查过程中出错:', error);
    }
}

// Setup IPC communication
function setupIpcMain() {
  // 数据库相关
  ipcMain.handle('check-database-initialized', async () => {
    try {
      return await checkDatabaseInitialized();
    } catch (error) {
      console.error('Failed to check database initialization:', error);
      return false;
    }
  });

  ipcMain.handle('initialize-database', async () => {
      try {
          return await initializeDatabase();
      } catch (error) {
          console.error('Failed to initialize database:', error);
          return false;
      }
  });

  // 系统相关
  ipcMain.handle('system-get-config', async () => {
    try {
      return await getSystemConfig();
    } catch (error) {
      console.error('Failed to get system config:', error);
      return null;
    }
  });

  ipcMain.handle('system-update-config', async (event, config) => {
    try {
      return await updateSystemConfig(config);
    } catch (error) {
      console.error('Failed to update system config:', error);
      return false;
    }
  });

  ipcMain.handle('system-increase-question-band-version', async () => {
    try {
      return await increaseQuestionBandVersion();
    } catch (error) {
      console.error('Failed to increase question band version:', error);
      return false;
    }
  });

  // 初始化认证相关IPC
  initAuthIpc(ipcMain);

  // 配置项管理相关IPC
  ipcMain.handle('config-fetch-all', async () => {
    try {
      return await fetchAllConfigs();
    } catch (error) {
      console.error('Failed to fetch all configs:', error);
      throw error;
    }
  });

  ipcMain.handle('config-fetch-by-id', async (event, id) => {
    try {
      return await fetchConfigById(id);
    } catch (error) {
      console.error(`Failed to fetch config by id ${id}:`, error);
      throw error;
    }
  });

  ipcMain.handle('config-save', async (event, { key, value }) => {
    try {
      await saveConfig(key, value);
      return true;
    } catch (error) {
      console.error(`Failed to save config ${key}:`, error);
      throw error;
    }
  });

  ipcMain.handle('config-delete', async (event, id) => {
    try {
      await removeConfig(id);
      return true;
    } catch (error) {
      console.error(`Failed to delete config ${id}:`, error);
      throw error;
    }
  });
}

// 确保在 app.whenReady() 中调用 setupIpcMain()
app.whenReady().then(() => {
  setupApp()
  createWindow()
  setupIpcMain()
});

// 删除下面这段重复的代码
// app.whenReady().then(() => {
//   setupApp()
//   createWindow()
//   setupIpcMain()
// });

// 在应用退出前关闭所有数据库连接
app.on('will-quit', () => {
    console.log('应用即将退出...');
    // closeAllConnections();
});