import {useState} from 'react';
import {useNavigate} from 'react-router-dom';
import {useTranslation} from 'react-i18next';
import {toast} from 'sonner';
import useSessionExpired from './useSessionExpired.js';
import {apiFetch} from '../utils/api.js';
import {hasSession} from '../utils/auth.js';

const RELOAD_DELAY_MS = 4000;

/**
 * Starts a library sync (POST /api/library/sync), reports the result as a toast and calls
 * onStarted after a short delay, so the caller can reload once Steam data has arrived.
 */
export default function useForceSync(onStarted) {
    const {t} = useTranslation();
    const navigate = useNavigate();
    const expireSession = useSessionExpired();
    const [busy, setBusy] = useState(false);

    const trigger = async () => {
        if (!hasSession()) {
            navigate('/login');
            return;
        }
        setBusy(true);
        try {
            const response = await apiFetch(`${import.meta.env.VITE_CORE_API_URL}/api/library/sync`, {
                method: 'POST',
            });
            if (response.status === 401) {
                expireSession();
                return;
            }
            if (response.status === 429) {
                const json = await response.json().catch(() => ({}));
                toast.warning(t('LIBRARY.SYNC_COOLDOWN', {seconds: json.retryAfterSeconds ?? 60}));
                return;
            }
            if (!response.ok) {
                toast.error(t('LIBRARY.SYNC_FAILED'));
                return;
            }
            toast.success(t('LIBRARY.SYNC_STARTED'));
            setTimeout(onStarted, RELOAD_DELAY_MS);
        } catch (err) {
            console.error('sync trigger error:', err);
            toast.error(t('INFO.ERROR.NETWORK_FAILURE'));
        } finally {
            setBusy(false);
        }
    };

    return {trigger, busy};
}