const { app, BrowserWindow, ipcMain, Tray, Menu, session, shell } = require('electron');
const path = require('path');
const Store = require('electron-store');
const axios = require('axios');

const store = new Store({
  encryptionKey: 'claude-widget-secure-key-2024'
});

let mainWindow = null;
let loginWindow = null;
let tray = null;

// Window configuration
const WIDGET_WIDTH = 480;
const WIDGET_HEIGHT = 140;

function createMainWindow() {
  mainWindow = new BrowserWindow({
    width: WIDGET_WIDTH,
    height: WIDGET_HEIGHT,
    frame: false,
    transparent: true,
    alwaysOnTop: true,
    resizable: false,
    skipTaskbar: false,
    webPreferences: {
      nodeIntegration: false,
      contextIsolation: true,
      preload: path.join(__dirname, 'preload.js')
    }
  });

  mainWindow.loadFile('src/renderer/index.html');

  // Make window draggable
  mainWindow.setAlwaysOnTop(true, 'floating');
  mainWindow.setVisibleOnAllWorkspaces(true);

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

  // Development tools
  if (process.env.NODE_ENV === 'development') {
    mainWindow.webContents.openDevTools({ mode: 'detach' });
  }
}

function createLoginWindow() {
  loginWindow = new BrowserWindow({
    width: 800,
    height: 700,
    parent: mainWindow,
    modal: true,
    webPreferences: {
      nodeIntegration: false,
      contextIsolation: true
    }
  });

  loginWindow.loadURL('https://claude.ai');

  let loginCheckInterval = null;
  let hasLoggedIn = false;

  // Function to check login status
  async function checkLoginStatus() {
    if (hasLoggedIn || !loginWindow) return;

    try {
      const cookies = await session.defaultSession.cookies.get({
        url: 'https://claude.ai',
        name: 'sessionKey'
      });

      if (cookies.length > 0) {
        const sessionKey = cookies[0].value;
        console.log('Session key found, attempting to get org ID...');

        // Fetch org ID from API
        let orgId = null;
        try {
          const response = await axios.get('https://claude.ai/api/organizations', {
            headers: {
              'Cookie': `sessionKey=${sessionKey}`,
              'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
            }
          });

          if (response.data && Array.isArray(response.data) && response.data.length > 0) {
            orgId = response.data[0].uuid || response.data[0].id;
            console.log('Org ID fetched from API:', orgId);
          }
        } catch (err) {
          console.log('API not ready yet:', err.message);
        }

        if (sessionKey && orgId) {
          hasLoggedIn = true;
          if (loginCheckInterval) {
            clearInterval(loginCheckInterval);
            loginCheckInterval = null;
          }

          console.log('Sending login-success to main window...');
          store.set('sessionKey', sessionKey);
          store.set('organizationId', orgId);

          if (mainWindow) {
            mainWindow.webContents.send('login-success', { sessionKey, organizationId: orgId });
            console.log('login-success sent');
          } else {
            console.error('mainWindow is null, cannot send login-success');
          }

          loginWindow.close();
        }
      }
    } catch (error) {
      console.error('Error in login check:', error);
    }
  }

  // Check on page load
  loginWindow.webContents.on('did-finish-load', async () => {
    const url = loginWindow.webContents.getURL();
    console.log('Login page loaded:', url);

    if (url.includes('claude.ai')) {
      await checkLoginStatus();
    }
  });

  // Also check on navigation (URL changes)
  loginWindow.webContents.on('did-navigate', async (event, url) => {
    console.log('Navigated to:', url);
    if (url.includes('claude.ai')) {
      await checkLoginStatus();
    }
  });

  // Poll periodically in case the session becomes ready without a page navigation
  loginCheckInterval = setInterval(async () => {
    if (!hasLoggedIn && loginWindow) {
      await checkLoginStatus();
    } else if (loginCheckInterval) {
      clearInterval(loginCheckInterval);
      loginCheckInterval = null;
    }
  }, 2000);

  loginWindow.on('closed', () => {
    if (loginCheckInterval) {
      clearInterval(loginCheckInterval);
      loginCheckInterval = null;
    }
    loginWindow = null;
  });
}

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

    const contextMenu = Menu.buildFromTemplate([
      {
        label: 'Show Widget',
        click: () => {
          if (mainWindow) {
            mainWindow.show();
          } else {
            createMainWindow();
          }
        }
      },
      {
        label: 'Refresh',
        click: () => {
          if (mainWindow) {
            mainWindow.webContents.send('refresh-usage');
          }
        }
      },
      { type: 'separator' },
      {
        label: 'Settings',
        click: () => {
          // TODO: Open settings window
        }
      },
      {
        label: 'Re-login',
        click: () => {
          store.delete('sessionKey');
          store.delete('organizationId');
          createLoginWindow();
        }
      },
      { type: 'separator' },
      {
        label: 'Exit',
        click: () => {
          app.quit();
        }
      }
    ]);

    tray.setToolTip('Claude Usage Widget');
    tray.setContextMenu(contextMenu);

    tray.on('click', () => {
      if (mainWindow) {
        mainWindow.isVisible() ? mainWindow.hide() : mainWindow.show();
      }
    });
  } catch (error) {
    console.error('Failed to create tray:', error);
  }
}

// IPC Handlers
ipcMain.handle('get-credentials', () => {
  return {
    sessionKey: store.get('sessionKey'),
    organizationId: store.get('organizationId')
  };
});

ipcMain.handle('save-credentials', (event, { sessionKey, organizationId }) => {
  store.set('sessionKey', sessionKey);
  if (organizationId) {
    store.set('organizationId', organizationId);
  }
  return true;
});

ipcMain.handle('delete-credentials', async () => {
  store.delete('sessionKey');
  store.delete('organizationId');

  // Clear the session cookie to ensure actual logout
  try {
    await session.defaultSession.cookies.remove('https://claude.ai', 'sessionKey');
    // Also try checking for other auth cookies or clear storage if needed
    // await session.defaultSession.clearStorageData({ storages: ['cookies'] });
  } catch (error) {
    console.error('Failed to clear cookies:', error);
  }

  return true;
});

ipcMain.on('open-login', () => {
  createLoginWindow();
});

ipcMain.on('minimize-window', () => {
  if (mainWindow) mainWindow.hide();
});

ipcMain.on('close-window', () => {
  app.quit();
});

ipcMain.handle('get-window-position', () => {
  if (mainWindow) {
    return mainWindow.getBounds();
  }
  return null;
});

ipcMain.handle('set-window-position', (event, { x, y }) => {
  if (mainWindow) {
    mainWindow.setPosition(x, y);
    return true;
  }
  return false;
});

ipcMain.on('open-external', (event, url) => {
  shell.openExternal(url);
});

ipcMain.handle('fetch-usage-data', async () => {
  console.log('[Main] fetch-usage-data handler called');
  const sessionKey = store.get('sessionKey');
  const organizationId = store.get('organizationId');

  console.log('[Main] Credentials:', {
    hasSessionKey: !!sessionKey,
    organizationId
  });

  if (!sessionKey || !organizationId) {
    throw new Error('Missing credentials');
  }

  try {
    console.log('[Main] Making API request to:', `https://claude.ai/api/organizations/${organizationId}/usage`);
    const response = await axios.get(
      `https://claude.ai/api/organizations/${organizationId}/usage`,
      {
        headers: {
          'Cookie': `sessionKey=${sessionKey}`,
          'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
        }
      }
    );
    console.log('[Main] API request successful, status:', response.status);
    return response.data;
  } catch (error) {
    console.error('[Main] API request failed:', error.message);
    if (error.response) {
      console.error('[Main] Response status:', error.response.status);
      if (error.response.status === 401 || error.response.status === 403) {
        throw new Error('Unauthorized');
      }
    }
    throw error;
  }
});

// App lifecycle
app.whenReady().then(() => {
  createMainWindow();
  createTray();

  // Check if we have credentials
  // const hasCredentials = store.get('sessionKey') && store.get('organizationId');
  // if (!hasCredentials) {
  //   setTimeout(() => {
  //     createLoginWindow();
  //   }, 1000);
  // }
});

app.on('window-all-closed', () => {
  // Don't quit on macOS
  if (process.platform !== 'darwin') {
    // Keep running in tray
  }
});

app.on('activate', () => {
  if (mainWindow === null) {
    createMainWindow();
  }
});

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