const express = require('express');
const fs      = require('fs');
const path    = require('path');
const { authenticate } = require('../middleware/auth');

const router = express.Router();

let VERSION = 'v1.0.0';
try { VERSION = fs.readFileSync(path.join(__dirname, '../../version.txt'), 'utf8').trim(); } catch {}

const GITEA_URL  = process.env.GITEA_URL;
const GITEA_REPO = process.env.GITEA_REPO;

router.get('/version', authenticate, (_req, res) => res.json({ version: VERSION }));

router.get('/update-check', authenticate, async (_req, res) => {
  if (!GITEA_URL || !GITEA_REPO)
    return res.json({ hasUpdate: false, currentVersion: VERSION, configured: false });
  try {
    const r = await fetch(`${GITEA_URL}/api/v1/repos/${GITEA_REPO}/releases?limit=5`,
      { signal: AbortSignal.timeout(5000) });
    const releases = await r.json();
    if (!Array.isArray(releases) || !releases.length)
      return res.json({ hasUpdate: false, currentVersion: VERSION, configured: true });
    res.json({
      hasUpdate:      releases[0].tag_name !== VERSION,
      currentVersion: VERSION,
      latestVersion:  releases[0].tag_name,
      configured:     true,
      releases: releases.map(r => ({
        version: r.tag_name, name: r.name || r.tag_name,
        body: r.body || '(Keine Beschreibung)', publishedAt: r.published_at,
      })),
    });
  } catch (e) {
    res.json({ hasUpdate: false, currentVersion: VERSION, configured: true });
  }
});

module.exports = router;