import { create } from "zustand";
import { loginRequest, meRequest, refreshRequest } from "../api/auth";
import type { AuthUser } from "../chat/types";

interface AuthState {
  accessToken: string | null;
  refreshToken: string | null;
  me: AuthUser | null;
  loading: boolean;
  setTokens: (accessToken: string, refreshToken: string) => void;
  login: (email: string, password: string) => Promise<void>;
  loadMe: () => Promise<void>;
  refresh: () => Promise<void>;
  logout: () => void;
}

const ACCESS_KEY = "bm_access_token";
const REFRESH_KEY = "bm_refresh_token";

export const useAuthStore = create<AuthState>((set, get) => ({
  accessToken: localStorage.getItem(ACCESS_KEY),
  refreshToken: localStorage.getItem(REFRESH_KEY),
  me: null,
  loading: false,
  setTokens: (accessToken, refreshToken) => {
    localStorage.setItem(ACCESS_KEY, accessToken);
    localStorage.setItem(REFRESH_KEY, refreshToken);
    set({ accessToken, refreshToken });
  },
  login: async (email, password) => {
    set({ loading: true });
    try {
      const data = await loginRequest(email, password);
      get().setTokens(data.access_token, data.refresh_token);
      await get().loadMe();
    } finally {
      set({ loading: false });
    }
  },
  loadMe: async () => {
    const me = await meRequest();
    set({ me });
  },
  refresh: async () => {
    const token = get().refreshToken;
    if (!token) {
      get().logout();
      return;
    }
    const data = await refreshRequest(token);
    get().setTokens(data.access_token, data.refresh_token);
  },
  logout: () => {
    localStorage.removeItem(ACCESS_KEY);
    localStorage.removeItem(REFRESH_KEY);
    set({ accessToken: null, refreshToken: null, me: null });
  }
}));