import { Router } from 'express';
import { randomBytes } from 'node:crypto';
import { listRecipients, createRecipient, deleteRecipient, deleteGrant, getAccessLog, logAccess } from './db.js';
import { requireAdminAuth } from './auth.js';

export const router = Router();

router.use(requireAdminAuth);

function newRecipientId(label: string): string {
  const slug = label.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-+|-+$/g, '').slice(0, 24);
  const suffix = randomBytes(3).toString('hex');
  return slug ? `${slug}-${suffix}` : suffix;
}

router.get('/recipients', (_req, res) => {
  res.json(listRecipients().map(r => ({ recipientId: r.recipient_id, label: r.label, publicKey: r.public_key, createdAt: r.created_at })));
});

router.post('/recipients', (req, res) => {
  const body = req.body as { label?: string; publicKey?: string };
  if (!body.label || !body.publicKey) {
    res.status(400).json({ error: 'label and publicKey are required' });
    return;
  }
  const recipientId = newRecipientId(body.label);
  createRecipient(recipientId, body.label, body.publicKey);
  res.json({ recipientId });
});

router.delete('/recipients/:id', (req, res) => {
  deleteRecipient(req.params.id);
  res.json({ ok: true });
});

// Revocation is pure metadata deletion — no crypto material is touched,
// which is exactly why admin alone (no vault access of their own
// required) can perform it, unlike `grant`.
router.delete('/vaults/:key/grants/:recipientId', (req, res) => {
  deleteGrant(req.params.key, req.params.recipientId);
  logAccess(req.params.key, req.params.recipientId, 'revoke');
  res.json({ ok: true });
});

router.get('/vaults/:key/log', (req, res) => {
  res.json(getAccessLog(req.params.key));
});