import { Router } from 'express';
import { z } from 'zod';
import { asyncWrap } from '../errors.js';
import { requireOwner } from '../cap.js';
import { validate } from '../validate.js';
import { compareVersions, fetchLatestKuttRelease, createLink, recentLinks } from '../../links/kutt.js';

export const router = Router();
const cfg = () => ({ base: process.env.KUTT_API_URL, key: process.env.KUTT_API_KEY });

// GET /kutt/version — running (pinned env) vs latest GitHub release (cached 6h).
let cache = { at: 0, val: null };
router.get('/version', requireOwner, asyncWrap(async (_req, res) => {
  const running = process.env.KUTT_VERSION || 'unknown';
  if (Date.now() - cache.at > 6 * 3600e3 || !cache.val) {
    try { cache = { at: Date.now(), val: await fetchLatestKuttRelease({}) }; }
    catch { return res.json({ running, latest: null, updateAvailable: false, error: 'version check unavailable' }); }
  }
  res.json({ ...compareVersions(running, cache.val.latest), url: cache.val.url });
}));

const linkBody = z.object({
  target: z.string().url(),
  customurl: z.string().max(64).optional(),
  description: z.string().max(200).optional()
});

// POST /kutt — create via Kutt (owner). Key stays server-side.
router.post('/', requireOwner, validate({ body: linkBody }), asyncWrap(async (req, res) => {
  if (!process.env.KUTT_API_KEY) return res.status(502).json({ error: { code: 'kutt_unconfigured' } });
  res.status(201).json(await createLink(req.body, cfg()));
}));

// GET /kutt/recent — last few links (owner).
router.get('/recent', requireOwner, asyncWrap(async (_req, res) => {
  res.json(await recentLinks(cfg()));
}));