import { deleteAvatarImage } from './avatarImage.js';

/**
 * 사용자 계정과 개인 데이터를 영구 삭제하고 저장 덱은 익명으로 보존한다.
 * @param {import('better-sqlite3').Database} db
 * @param {number} userId
 * @returns {{deleted: boolean, retainedDeckCount: number, avatarDeleted: boolean}}
 */
export function deleteUserAccount(db, userId) {
    const user = db.prepare('SELECT id FROM users WHERE id = ?').get(userId);
    if (!user) {
        return {
            deleted: false,
            retainedDeckCount: 0,
            avatarDeleted: false,
        };
    }

    const retainedDeckCount = db.prepare(`
        SELECT COUNT(*) AS count
        FROM decks
        WHERE user_id = ?
    `).get(userId).count;

    db.prepare('DELETE FROM users WHERE id = ?').run(userId);
    const avatarDeleted = deleteAvatarImage(userId);

    return {
        deleted: true,
        retainedDeckCount,
        avatarDeleted,
    };
}