import { Router, Response, NextFunction } from 'express';
import { body, validationResult } from 'express-validator';
import prisma from '../lib/prisma';
import { optionalAuth, authenticate, requireRole, AuthRequest } from '../middleware/auth';

const router = Router();

// POST /api/donations — public (guest) or authenticated
// Stripe integration stub: stores intent, returns client_secret placeholder
router.post('/', optionalAuth,
  [
    body('amount').isFloat({ min: 1 }).withMessage('Amount must be at least $1'),
    body('campaign').optional().isIn(['land_preservation', 'volunteer_equipment', 'general']),
  ],
  async (req: AuthRequest, res: Response, next: NextFunction) => {
    const errors = validationResult(req);
    if (!errors.isEmpty()) { res.status(422).json({ errors: errors.array() }); return; }

    try {
      const { amount, campaign } = req.body;

      // STUB: In production, create a Stripe PaymentIntent here and return client_secret
      // const intent = await stripe.paymentIntents.create({ amount: Math.round(amount * 100), currency: 'usd' });
      const stripe_payment_id = `pi_stub_${Date.now()}`;

      const donation = await prisma.donation.create({
        data: {
          donor_id: req.user?.userId ?? null,
          amount: parseFloat(amount),
          campaign: campaign || 'general',
          stripe_payment_id,
        },
      });

      res.status(201).json({
        donation,
        // stub: replace with real Stripe client_secret for frontend confirmation
        client_secret: `${stripe_payment_id}_secret`,
        message: 'Stripe integration pending — payment recorded as stub',
      });
    } catch (err) { next(err); }
  }
);

// GET /api/donations — admin only
router.get('/', authenticate, requireRole('admin'), async (_req: AuthRequest, res: Response, next: NextFunction) => {
  try {
    const donations = await prisma.donation.findMany({
      include: { donor: { select: { id: true, name: true, email: true } } },
      orderBy: { created_at: 'desc' },
    });
    res.json(donations);
  } catch (err) { next(err); }
});

export default router;