'use client';

import {
  createContext,
  type ReactNode,
  useCallback,
  useContext,
  useEffect,
  useMemo,
  useState,
} from 'react';

import { logout as logoutRequest, getCurrentUser } from '@/features/auth/api/auth';
import type { AuthUser } from '@/types/auth';

interface AuthContextValue {
  user: AuthUser | null;
  isLoading: boolean;
  isAuthenticated: boolean;
  refreshUser: () => Promise<AuthUser | null>;
  setUser: (user: AuthUser | null) => void;
  logout: () => Promise<void>;
}

const AuthContext = createContext<AuthContextValue | null>(null);

interface AuthProviderProps {
  children: ReactNode;
}

export function AuthProvider({ children }: AuthProviderProps) {
  const [user, setUserState] = useState<AuthUser | null>(null);
  const [isLoading, setIsLoading] = useState(true);

  const refreshUser = useCallback(async () => {
    try {
      const nextUser = await getCurrentUser();
      setUserState(nextUser);
      return nextUser;
    } catch {
      setUserState(null);
      return null;
    } finally {
      setIsLoading(false);
    }
  }, []);

  useEffect(() => {
    void refreshUser();
  }, [refreshUser]);

  const setUser = useCallback((nextUser: AuthUser | null) => {
    setUserState(nextUser);
    setIsLoading(false);
  }, []);

  const logout = useCallback(async () => {
    try {
      await logoutRequest();
    } finally {
      setUserState(null);
      setIsLoading(false);
    }
  }, []);

  const value = useMemo(
    () => ({
      user,
      isLoading,
      isAuthenticated: user !== null,
      refreshUser,
      setUser,
      logout,
    }),
    [isLoading, logout, refreshUser, setUser, user],
  );

  return <AuthContext.Provider value={value}>{children}</AuthContext.Provider>;
}

export function useAuth() {
  const context = useContext(AuthContext);

  if (!context) {
    throw new Error('useAuth must be used within AuthProvider');
  }

  return context;
}