'use client';
import { create } from 'zustand';
import { api, getToken, setToken, clearToken } from './api';

interface AuthUser { id?: number; username: string; role: string; created_at?: string; last_login_at?: string; }

interface AuthState {
  user: AuthUser | null;
  loading: boolean;
  error: string | null;
  login: (u: string, p: string) => Promise<boolean>;
  logout: () => void;
  fetchMe: () => Promise<void>;
}

export const useAuth = create<AuthState>((set) => ({
  user: null,
  loading: false,
  error: null,
  async login(u, p) {
    set({ loading: true, error: null });
    try {
      const r = await api.post<{ access_token: string; user: AuthUser }>('/api/auth/login', { username: u, password: p });
      setToken(r.access_token);
      set({ user: r.user, loading: false });
      return true;
    } catch (e: any) {
      set({ error: e?.message || '로그인 실패', loading: false });
      return false;
    }
  },
  logout() {
    clearToken();
    set({ user: null });
    if (typeof window !== 'undefined') window.location.href = '/login';
  },
  async fetchMe() {
    if (!getToken()) { set({ user: null }); return; }
    try {
      const me = await api.get<AuthUser>('/api/auth/me');
      set({ user: me });
    } catch {
      clearToken();
      set({ user: null });
    }
  },
}));