import { createContext, useContext, useEffect, useState } from "react";
import { api, getToken, setToken } from "./api";

const AuthContext = createContext(null);

export function AuthProvider({ children }) {
  const [user, setUser] = useState(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    async function boot() {
      if (getToken()) {
        try {
          setUser(await api.me());
        } catch {
          setToken(null);
        }
      }
      setLoading(false);
    }
    boot();
  }, []);

  async function login(username, password) {
    const res = await api.login(username, password);
    setToken(res.access_token);
    const me = await api.me();
    setUser(me);
    return me;
  }

  function logout() {
    setToken(null);
    setUser(null);
  }

  const isAdmin = user?.role === "admin";

  return (
    <AuthContext.Provider value={{ user, isAdmin, loading, login, logout }}>
      {children}
    </AuthContext.Provider>
  );
}

export function useAuth() {
  return useContext(AuthContext);
}