import { createContext, useContext, useState, useEffect, ReactNode } from 'react';
import { api } from '@/lib/api';
import type { UserProfileSchema } from '@/lib/types';

type User = UserProfileSchema;

interface AuthContextType {
  user: User | null;
  loading: boolean;
  login: (email: string, password: string) => Promise<void>;
  logout: () => void;
  isAuthenticated: boolean;
}

const AuthContext = createContext<AuthContextType | undefined>(undefined);

export function AuthProvider({ children }: { children: ReactNode }) {
  const [user, setUser] = useState<User | null>(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    checkAuth();
  }, []);

  const checkAuth = async () => {
    const token = localStorage.getItem('access_token');
    if (token) {
      try {
        const profile = await api.getProfile();
        setUser(profile as User);
      } catch (error) {
        localStorage.removeItem('access_token');
        localStorage.removeItem('refresh_token');
      }
    }
    setLoading(false);
  };

  const login = async (email: string, password: string) => {
    const response = await api.login({ email, password });
    localStorage.setItem('access_token', response.access_token);
    localStorage.setItem('refresh_token', response.refresh_token);
    await checkAuth();
  };

  const logout = () => {
    localStorage.removeItem('access_token');
    localStorage.removeItem('refresh_token');
    setUser(null);
  };

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

export function useAuth() {
  const context = useContext(AuthContext);
  if (context === undefined) {
    throw new Error('useAuth must be used within an AuthProvider');
  }
  return context;
}
