const fs = require('fs');
const path = require('path');

const BACKUP_BASE = path.resolve(__dirname, '..', '..');
const SRC_DIR = path.resolve(__dirname, '..');

const EXCLUDE_DIRS = ['node_modules', '.git', '.claude', 'dist'];

function shouldExclude(full, srcDir) {
  const relative = path.relative(srcDir, full).replace(/\\/g, '/');
  const basename = path.basename(full);
  for (const d of EXCLUDE_DIRS) {
    if (relative === d || relative.startsWith(d + '/')) return true;
  }
  return false;
}

function collectFiles(srcDir) {
  const files = [];
  function walk(dir) {
    const entries = fs.readdirSync(dir);
    for (const entry of entries) {
      const full = path.join(dir, entry);
      if (shouldExclude(full, srcDir)) continue;
      const stat = fs.statSync(full);
      if (stat.isDirectory()) walk(full);
      else files.push(full);
    }
  }
  walk(srcDir);
  return files;
}

function copyFiles(files, srcDir, destDir) {
  for (const full of files) {
    const relative = path.relative(srcDir, full);
    const dest = path.join(destDir, relative);
    fs.mkdirSync(path.dirname(dest), { recursive: true });
    fs.copyFileSync(full, dest);
  }
}

const pkgPath = path.join(SRC_DIR, 'package.json');
const pkg = JSON.parse(fs.readFileSync(pkgPath, 'utf-8'));
const version = pkg.version || 'unknown';

const now = new Date();
const ts = now.toISOString().replace(/[:.]/g, '-').slice(0, 19);

const folderName = 'backend-service_v' + version + '_' + ts;
const backupPath = path.join(BACKUP_BASE, folderName);

console.log('Version: ' + version);
console.log('Creating backup: ' + backupPath);

const files = collectFiles(SRC_DIR);
console.log('Found ' + files.length + ' source files');

copyFiles(files, SRC_DIR, backupPath);
console.log('Backup complete: ' + backupPath);

const serverJs = fs.readFileSync(path.join(backupPath, 'server.js'), 'utf-8');
const hasNewColors = serverJs.includes('#339CFF');
console.log('New ChatGPT colors in backup: ' + (hasNewColors ? 'YES' : 'NO'));