import express, { Request, Response } from 'express';
import multer from 'multer';
import { authenticate } from '../middleware/auth';
import { requireTripAccess } from '../middleware/tripAccess';
import { broadcast } from '../websocket';
import { validateStringLengths } from '../middleware/validate';
import { checkPermission } from '../services/permissions';
import { AuthRequest } from '../types';
import {
  listPlaces,
  createPlace,
  getPlace,
  updatePlace,
  deletePlace,
  importGpx,
  importGoogleList,
  searchPlaceImage,
} from '../services/placeService';

const gpxUpload = multer({ storage: multer.memoryStorage(), limits: { fileSize: 10 * 1024 * 1024 } });

const router = express.Router({ mergeParams: true });

router.get('/', authenticate, requireTripAccess, (req: Request, res: Response) => {
  const { tripId } = req.params;
  const { search, category, tag } = req.query;

  const places = listPlaces(tripId, {
    search: search as string | undefined,
    category: category as string | undefined,
    tag: tag as string | undefined,
  });

  res.json({ places });
});

router.post('/', authenticate, requireTripAccess, validateStringLengths({ name: 200, description: 2000, address: 500, notes: 2000 }), (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (!checkPermission('place_edit', authReq.user.role, authReq.trip!.user_id, authReq.user.id, authReq.trip!.user_id !== authReq.user.id))
    return res.status(403).json({ error: 'No permission' });

  const { tripId } = req.params;
  const { name } = req.body;

  if (!name) {
    return res.status(400).json({ error: 'Place name is required' });
  }

  const place = createPlace(tripId, req.body);
  res.status(201).json({ place });
  broadcast(tripId, 'place:created', { place }, req.headers['x-socket-id'] as string);
});

// Import places from GPX file with full track geometry (must be before /:id)
router.post('/import/gpx', authenticate, requireTripAccess, gpxUpload.single('file'), (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (!checkPermission('place_edit', authReq.user.role, authReq.trip!.user_id, authReq.user.id, authReq.trip!.user_id !== authReq.user.id))
    return res.status(403).json({ error: 'No permission' });

  const { tripId } = req.params;
  const file = (req as any).file;
  if (!file) return res.status(400).json({ error: 'No file uploaded' });

  const created = importGpx(tripId, file.buffer);
  if (!created) {
    return res.status(400).json({ error: 'No waypoints found in GPX file' });
  }

  res.status(201).json({ places: created, count: created.length });
  for (const place of created) {
    broadcast(tripId, 'place:created', { place }, req.headers['x-socket-id'] as string);
  }
});

// Import places from a shared Google Maps list URL
router.post('/import/google-list', authenticate, requireTripAccess, async (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (!checkPermission('place_edit', authReq.user.role, authReq.trip!.user_id, authReq.user.id, authReq.trip!.user_id !== authReq.user.id))
    return res.status(403).json({ error: 'No permission' });

  const { tripId } = req.params;
  const { url } = req.body;
  if (!url || typeof url !== 'string') return res.status(400).json({ error: 'URL is required' });

  try {
    const result = await importGoogleList(tripId, url);

    if ('error' in result) {
      return res.status(result.status).json({ error: result.error });
    }

    res.status(201).json({ places: result.places, count: result.places.length, listName: result.listName });
    for (const place of result.places) {
      broadcast(tripId, 'place:created', { place }, req.headers['x-socket-id'] as string);
    }
  } catch (err: unknown) {
    console.error('[Places] Google list import error:', err instanceof Error ? err.message : err);
    res.status(400).json({ error: 'Failed to import Google Maps list. Make sure the list is shared publicly.' });
  }
});

router.get('/:id', authenticate, requireTripAccess, (req: Request, res: Response) => {
  const { tripId, id } = req.params;

  const place = getPlace(tripId, id);
  if (!place) {
    return res.status(404).json({ error: 'Place not found' });
  }

  res.json({ place });
});

router.get('/:id/image', authenticate, requireTripAccess, async (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  const { tripId, id } = req.params;

  try {
    const result = await searchPlaceImage(tripId, id, authReq.user.id);

    if ('error' in result) {
      return res.status(result.status).json({ error: result.error });
    }

    res.json({ photos: result.photos });
  } catch (err: unknown) {
    console.error('Unsplash error:', err);
    res.status(500).json({ error: 'Error searching for image' });
  }
});

router.put('/:id', authenticate, requireTripAccess, validateStringLengths({ name: 200, description: 2000, address: 500, notes: 2000 }), (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (!checkPermission('place_edit', authReq.user.role, authReq.trip!.user_id, authReq.user.id, authReq.trip!.user_id !== authReq.user.id))
    return res.status(403).json({ error: 'No permission' });

  const { tripId, id } = req.params;

  const place = updatePlace(tripId, id, req.body);
  if (!place) {
    return res.status(404).json({ error: 'Place not found' });
  }

  res.json({ place });
  broadcast(tripId, 'place:updated', { place }, req.headers['x-socket-id'] as string);
});

router.delete('/:id', authenticate, requireTripAccess, (req: Request, res: Response) => {
  const authReq = req as AuthRequest;
  if (!checkPermission('place_edit', authReq.user.role, authReq.trip!.user_id, authReq.user.id, authReq.trip!.user_id !== authReq.user.id))
    return res.status(403).json({ error: 'No permission' });

  const { tripId, id } = req.params;

  const deleted = deletePlace(tripId, id);
  if (!deleted) {
    return res.status(404).json({ error: 'Place not found' });
  }

  res.json({ success: true });
  broadcast(tripId, 'place:deleted', { placeId: Number(id) }, req.headers['x-socket-id'] as string);
});

export default router;