import express, { Request, Response } from 'express';
import { authenticate } from '../middleware/auth';
import { AuthRequest } from '../types';
import { testSmtp, testWebhook } from '../services/notifications';
import {
  getNotifications,
  getUnreadCount,
  markRead,
  markUnread,
  markAllRead,
  deleteNotification,
  deleteAll,
  respondToBoolean,
} from '../services/inAppNotifications';
import * as prefsService from '../services/notificationPreferencesService';

const router = express.Router();

router.get('/preferences', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  res.json({ preferences: prefsService.getPreferences(authReq.user.id) });
});

router.put('/preferences', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const { notify_trip_invite, notify_booking_change, notify_trip_reminder, notify_webhook } = req.body;
  const preferences = prefsService.updatePreferences(authReq.user.id, {
    notify_trip_invite, notify_booking_change, notify_trip_reminder, notify_webhook
  });
  res.json({ preferences });
});

router.post('/test-smtp', authenticate, async (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (authReq.user.role !== 'admin') return res.status(403).json({ error: 'Admin only' });
  const { email } = req.body;
  res.json(await testSmtp(email || authReq.user.email));
});

router.post('/test-webhook', authenticate, async (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (authReq.user.role !== 'admin') return res.status(403).json({ error: 'Admin only' });
  res.json(await testWebhook());
});

// ── In-app notifications ──────────────────────────────────────────────────────

// GET /in-app — list notifications (paginated)
router.get('/in-app', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const limit = Math.min(parseInt(req.query.limit as string) || 20, 50);
  const offset = parseInt(req.query.offset as string) || 0;
  const unreadOnly = req.query.unread_only === 'true';

  const result = getNotifications(authReq.user.id, { limit, offset, unreadOnly });
  res.json(result);
});

// GET /in-app/unread-count — badge count
router.get('/in-app/unread-count', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const count = getUnreadCount(authReq.user.id);
  res.json({ count });
});

// PUT /in-app/read-all — mark all read (must be before /:id routes)
router.put('/in-app/read-all', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const count = markAllRead(authReq.user.id);
  res.json({ success: true, count });
});

// DELETE /in-app/all — delete all (must be before /:id routes)
router.delete('/in-app/all', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const count = deleteAll(authReq.user.id);
  res.json({ success: true, count });
});

// PUT /in-app/:id/read — mark single read
router.put('/in-app/:id/read', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const id = parseInt(req.params.id);
  if (isNaN(id)) return res.status(400).json({ error: 'Invalid id' });

  const ok = markRead(id, authReq.user.id);
  if (!ok) return res.status(404).json({ error: 'Not found' });
  res.json({ success: true });
});

// PUT /in-app/:id/unread — mark single unread
router.put('/in-app/:id/unread', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const id = parseInt(req.params.id);
  if (isNaN(id)) return res.status(400).json({ error: 'Invalid id' });

  const ok = markUnread(id, authReq.user.id);
  if (!ok) return res.status(404).json({ error: 'Not found' });
  res.json({ success: true });
});

// DELETE /in-app/:id — delete single
router.delete('/in-app/:id', authenticate, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const id = parseInt(req.params.id);
  if (isNaN(id)) return res.status(400).json({ error: 'Invalid id' });

  const ok = deleteNotification(id, authReq.user.id);
  if (!ok) return res.status(404).json({ error: 'Not found' });
  res.json({ success: true });
});

// POST /in-app/:id/respond — respond to a boolean notification
router.post('/in-app/:id/respond', authenticate, async (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const id = parseInt(req.params.id);
  if (isNaN(id)) return res.status(400).json({ error: 'Invalid id' });

  const { response } = req.body;
  if (response !== 'positive' && response !== 'negative') {
    return res.status(400).json({ error: 'response must be "positive" or "negative"' });
  }

  const result = await respondToBoolean(id, authReq.user.id, response);
  if (!result.success) return res.status(400).json({ error: result.error });
  res.json({ success: true, notification: result.notification });
});

export default router;