import State from './state.js';
import Bus from './bus.js';

const Auth = (() => {
  function login(name) {
    const trimmed = name.trim();
    if (!trimmed) return;
    const initials = trimmed.slice(0, 2).toUpperCase();
    State.set('user', { name: trimmed, initials });
    document.getElementById('login').classList.add('hidden');
    const desktop = document.getElementById('desktop');
    desktop.classList.remove('hidden');
    desktop.hidden = false;
    Bus.emit('user:login', { name: trimmed });
    // Persist login session
    localStorage.setItem('meridian:session', trimmed);
  }

  function logout() {
    State.set('user', null);
    localStorage.removeItem('meridian:session');
    location.reload();
  }

  function init() {
    const session = localStorage.getItem('meridian:session');
    if (session) {
      const trimmed = session.trim();
      if (trimmed) {
        const initials = trimmed.slice(0, 2).toUpperCase();
        State.set('user', { name: trimmed, initials });
        const loginEl = document.getElementById('login');
        if (loginEl) loginEl.classList.add('hidden');
        const desktop = document.getElementById('desktop');
        if (desktop) {
          desktop.classList.remove('hidden');
          desktop.hidden = false;
        }
        return;
      }
    }
    // Wire login form
    const btn = document.getElementById('login-btn');
    const input = document.getElementById('login-input');
    const submit = () => { if (input && input.value.trim()) login(input.value); };
    if (btn) btn.addEventListener('click', submit);
    if (input) {
      input.addEventListener('keydown', (e) => {
        if (e.key === 'Enter') { e.preventDefault(); submit(); }
      });
      setTimeout(() => input.focus(), 50);
    }
    // Live clock on login screen
    const loginTime = document.getElementById('login-time');
    if (loginTime) {
      const tick = () => {
        const d = new Date();
        const hh = String(d.getHours()).padStart(2, '0');
        const mm = String(d.getMinutes()).padStart(2, '0');
        loginTime.textContent = `${hh}:${mm}`;
      };
      tick();
      setInterval(tick, 1000 * 30);
    }
  }

  return { login, logout, init };
})();

export default Auth;
export { Auth };