// updater.js - Auto-updater for Autoscale Bot
// Checks the GitHub repository for a newer release and updates the bot.
// Requires node-fetch (added to dependencies).

const fetch = require('node-fetch');
const { execSync } = require('child_process');
const fs = require('fs');

// Configuration - replace with actual repo owner/name if different.
const REPO = 'your-github-username/autoscale';
const GITHUB_API = `https://api.github.com/repos/${REPO}/releases/latest`;

function getCurrentVersion() {
  try {
    const pkg = JSON.parse(fs.readFileSync('package.json', 'utf8'));
    return pkg.version;
  } catch (e) {
    console.error('Failed to read package.json:', e);
    return null;
  }
}

async function getLatestRelease() {
  try {
    const resp = await fetch(GITHUB_API, { headers: { 'User-Agent': 'autoscale-updater' } });
    if (!resp.ok) throw new Error(`GitHub API error ${resp.status}`);
    const data = await resp.json();
    return { version: data.tag_name.replace(/^v/, ''), tarball_url: data.tarball_url };
  } catch (e) {
    console.error('Failed to fetch latest release:', e);
    return null;
  }
}

async function runUpdate() {
  const current = getCurrentVersion();
  const latest = await getLatestRelease();
  if (!current || !latest) return;

  if (current === latest.version) {
    console.log(`✅ Already up‑to‑date (v${current}).`);
    return;
  }

  console.log(`🔄 Updating from v${current} to v${latest.version}…`);
  try {
    // Pull latest code from git (assumes the repo is a git clone)
    execSync('git fetch --all', { stdio: 'inherit' });
    execSync(`git checkout v${latest.version}`, { stdio: 'inherit' });
    // Install any new dependencies
    execSync('npm install', { stdio: 'inherit' });
    console.log('✅ Update complete. Restart the bot (e.g., pm2 restart autoscale).');
  } catch (e) {
    console.error('Update failed:', e);
  }
}

if (require.main === module) {
  runUpdate();
}