import { Request, Response, NextFunction } from 'express';
import { supabase } from '../lib/supabase';

// Extend Express Request type to include user
declare global {
  namespace Express {
    interface Request {
      user?: {
        id: string;
        email: string;
        role: string;
      };
    }
  }
}

export async function authenticateUser(
  req: Request,
  res: Response,
  next: NextFunction
) {
  try {
    const authHeader = req.headers.authorization;
    if (!authHeader) {
      return res.status(401).json({ error: 'No authorization header' });
    }

    const token = authHeader.replace('Bearer ', '');
    const { data: { user }, error } = await supabase.auth.getUser(token);

    if (error || !user) {
      return res.status(401).json({ error: 'Invalid token' });
    }

    // Add user info to request
    req.user = {
      id: user.id,
      email: user.email!,
      role: (user.app_metadata?.role as string) || 'user'
    };

    next();
  } catch (error) {
    console.error('Authentication error:', error);
    res.status(401).json({ error: 'Authentication failed' });
  }
}