'use client';

import { createContext, useContext, useEffect, useState } from 'react';
import { 
  User,
  signInWithEmailAndPassword,
  createUserWithEmailAndPassword,
  signOut,
  onAuthStateChanged,
  GoogleAuthProvider,
  signInWithPopup,
  sendPasswordResetEmail,
} from 'firebase/auth';
import { auth } from '../lib/firebase';

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

const AuthContext = createContext<AuthContextType>({} as AuthContextType);

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

  useEffect(() => {
    const unsubscribe = onAuthStateChanged(auth, (user) => {
      setUser(user);
      setLoading(false);
    });

    return () => unsubscribe();
  }, []);

  const signIn = async (email: string, password: string) => {
    try {
      await signInWithEmailAndPassword(auth, email, password);
    } catch (error) {
      throw error;
    }
  };

  const signUp = async (email: string, password: string) => {
    try {
      await createUserWithEmailAndPassword(auth, email, password);
    } catch (error) {
      throw error;
    }
  };

  const signInWithGoogle = async () => {
    try {
      const provider = new GoogleAuthProvider();
      await signInWithPopup(auth, provider);
    } catch (error) {
      throw error;
    }
  };

  const logout = async () => {
    try {
      await signOut(auth);
    } catch (error) {
      throw error;
    }
  };

  const resetPassword = async (email: string) => {
    try {
      await sendPasswordResetEmail(auth, email);
    } catch (error) {
      throw error;
    }
  };

  const value = {
    user,
    loading,
    signIn,
    signUp,
    signInWithGoogle,
    logout,
    resetPassword,
  };

  return (
    <AuthContext.Provider value={value}>
      {!loading && children}
    </AuthContext.Provider>
  );
}

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