// Singleton guard — openclaw calls register() twice per process
let _registered = false;

export default function register(_api) {
  if (_registered) return;
  _registered = true;

  const server = globalThis.__yonexusServer;
  if (!server) {
    console.error('[server-test] __yonexusServer not on globalThis — ensure Yonexus.Server loads first');
    return;
  }

  console.log('[server-test] __yonexusServer available, keys:', Object.keys(server));

  // Register test_ping rule
  // Received format (rewritten by server): test_ping::<senderIdentifier>::<content>
  server.ruleRegistry.registerRule('test_ping', (raw) => {
    const firstSep = raw.indexOf('::');
    const rest = raw.slice(firstSep + 2);
    const secondSep = rest.indexOf('::');
    const sender = rest.slice(0, secondSep);
    const content = rest.slice(secondSep + 2);
    console.log(`[server-test] MATCH  test_ping  from="${sender}"  content="${content}"`);
    // Echo back to sender via test_pong
    const sent = server.sendRule(sender, 'test_pong', `echo-${content}`);
    console.log(`[server-test] echo sent=${sent}`);
  });

  // When a client authenticates, send one matching and one non-matching rule message
  server.onClientAuthenticated.push((identifier) => {
    console.log(`[server-test] Client "${identifier}" authenticated — sending test_pong + other_rule`);
    const s1 = server.sendRule(identifier, 'test_pong', 'welcome-from-server');
    const s2 = server.sendRule(identifier, 'other_rule', 'other-from-server');
    console.log(`[server-test] sendRule results: test_pong=${s1} other_rule=${s2}`);
  });

  console.log('[server-test] registered test_ping rule and onClientAuthenticated callback');
}