import { api } from './api.js';

class AuthStore {
  constructor() {
    this.user = null;
    this.listeners = new Set();
  }

  subscribe(fn) {
    this.listeners.add(fn);
    return () => this.listeners.delete(fn);
  }

  emit() {
    for (const fn of this.listeners) fn(this.user);
  }

  async refresh() {
    try {
      const { user } = await api.get('/auth/me');
      this.user = user;
    } catch {
      this.user = null;
    }
    this.emit();
    return this.user;
  }

  async login(identifier, password) {
    const { user } = await api.post('/auth/login', { identifier, password });
    this.user = user;
    this.emit();
    return user;
  }

  async register({ email, username, password }) {
    const result = await api.post('/auth/register', { email, username, password });
    this.user = result.user;
    this.emit();
    return result;
  }

  async logout() {
    try { await api.post('/auth/logout'); } catch { /* ignore */ }
    this.user = null;
    this.emit();
  }
}

export const auth = new AuthStore();