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

// naive scan for @Controller and @Get/@Post/@Put/@Delete decorations
function scanControllers(rootDir) {
  const results = [];
  function walk(dir) {
    for (const entry of fs.readdirSync(dir)) {
      const full = path.join(dir, entry);
      const stat = fs.statSync(full);
      if (stat.isDirectory()) walk(full);
      else if (entry.endsWith('.ts') && full.includes(path.join('controllers', 'adminapi'))) {
        const txt = fs.readFileSync(full, 'utf8');
        const controllerPrefixMatch = txt.match(/@Controller\(['"]([^'\"]+)['"]\)/);
        const prefix = controllerPrefixMatch ? controllerPrefixMatch[1] : '';
        const routeRegex = /@(Get|Post|Put|Delete)\(['"]([^'\"]*)['"]\)/g;
        let m;
        while ((m = routeRegex.exec(txt))) {
          const method = m[1].toUpperCase();
          const suffix = m[2];
          const fullPath = suffix ? `${prefix}/${suffix}` : prefix;
          results.push({ method, path: fullPath.replace(/\/:/g, '/:') });
        }
      }
    }
  }
  walk(rootDir);
  return results;
}

function main() {
  const contract = JSON.parse(
    fs.readFileSync(path.join(__dirname, 'contracts', 'routes.json'), 'utf8'),
  );
  const impl = scanControllers(path.join(__dirname, '..', 'wwjcloud', 'src', 'common'));

  function normalizePath(p) {
    // convert ${ var } or ${ params.var } to :var
    return String(p).replace(/\$\{\s*(?:params\.)?([a-zA-Z_][\w]*)\s*\}/g, ':$1');
  }

  const toKey = (r) => `${r.method} ${normalizePath(r.path)}`;
  const contractSet = new Set(contract.map(toKey));
  const implSet = new Set(impl.map(toKey));

  const missing = contract.filter((r) => !implSet.has(toKey(r)));
  const extra = impl.filter((r) => !contractSet.has(toKey(r)));

  if (missing.length || extra.length) {
    console.error('Route contract mismatches found.');
    if (missing.length) {
      console.error('Missing routes:');
      for (const r of missing) console.error(`  ${r.method} ${r.path}`);
    }
    if (extra.length) {
      console.error('Extra routes:');
      for (const r of extra) console.error(`  ${r.method} ${r.path}`);
    }
    process.exit(1);
  }
  console.log('All routes match contract.');
}

main();