/**
 * 덱 저장 시 공개 여부 기본값·프롬프트 설정
 */
const UaDeckPrefs = (() => {
    const LS_DEFAULT_PUBLIC = 'uadeck_default_deck_public';
    const LS_SKIP_PROMPT = 'uadeck_skip_deck_public_prompt';

    /**
     * @param {object|null|undefined} user
     * @returns {{ defaultPublic: boolean, skipPrompt: boolean }}
     */
    function getPrefs(user) {
        if (user && (user.defaultDeckPublic !== undefined || user.skipDeckPublicPrompt !== undefined)) {
            return {
                defaultPublic: user.defaultDeckPublic !== false,
                skipPrompt: Boolean(user.skipDeckPublicPrompt),
            };
        }
        return {
            defaultPublic: localStorage.getItem(LS_DEFAULT_PUBLIC) !== '0',
            skipPrompt: localStorage.getItem(LS_SKIP_PROMPT) === '1',
        };
    }

    /**
     * 로컬 캐시 동기화
     * @param {{ defaultPublic: boolean, skipPrompt: boolean }} prefs
     */
    function syncLocal(prefs) {
        localStorage.setItem(LS_DEFAULT_PUBLIC, prefs.defaultPublic ? '1' : '0');
        localStorage.setItem(LS_SKIP_PROMPT, prefs.skipPrompt ? '1' : '0');
    }

    /**
     * @param {{ defaultPublic: boolean, skipPrompt: boolean }} prefs
     * @returns {Promise<void>}
     */
    async function savePrefs(prefs) {
        syncLocal(prefs);
        if (!window.UaDeckApi?.getToken()) return;
        try {
            const { user } = await window.UaDeckApi.updateProfile({
                defaultDeckPublic: prefs.defaultPublic,
                skipDeckPublicPrompt: prefs.skipPrompt,
            });
            window.UaDeckApi.saveAuth(window.UaDeckApi.getToken(), user);
        } catch (err) {
            console.warn('덱 저장 설정 동기화 실패:', err);
        }
    }

    return { getPrefs, syncLocal, savePrefs };
})();

window.UaDeckPrefs = UaDeckPrefs;