import { useState, useEffect } from 'react';
import api from '../api';

interface CurrentUser {
    id: number;
    username: string;
    fullName: string;
    email: string;
    privilege: string;
    mandateId: number;
}

interface UseCurrentUserReturn {
    user: CurrentUser | null;
    error: string | null;
    isLoading: boolean;
    refetch: () => Promise<void>;
}

export function useCurrentUser(): UseCurrentUserReturn {
    const [user, setUser] = useState<CurrentUser | null>(null);
    const [error, setError] = useState<string | null>(null);
    const [isLoading, setIsLoading] = useState(false);

    const fetchCurrentUser = async () => {
        setIsLoading(true);
        setError(null);

        try {
            const response = await api.get('/api/user/me');
            setUser(response.data);
        } catch (error: any) {
            let errorMessage = 'Fehler beim Abrufen des Benutzerprofils';
            
            if (error.response) {
                errorMessage = error.response.data?.detail || error.response.data?.message || errorMessage;
            } else if (error.request) {
                errorMessage = 'Keine Antwort vom Server erhalten';
            } else {
                errorMessage = error.message || errorMessage;
            }
            
            setError(errorMessage);
            setUser(null);
        } finally {
            setIsLoading(false);
        }
    };

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

    return {
        user,
        error,
        isLoading,
        refetch: fetchCurrentUser
    };
}