"""
Users database operations.
Pure in-memory via MemoryDB. No local files.
"""

from memory_db import get_db


def init_users_db():
    db = get_db()
    count = db.count('users')
    print(f"  ✅ Users DB ready: {count} users in memory")


def load_users_db():
    return get_db().read('users')


def save_users_db(data):
    get_db().write_full('users', data)


def get_user(username):
    return get_db().read_key('users', username)


def update_user(username, update_fn):
    return get_db().update_key('users', username, update_fn)


def set_user(username, user_data):
    get_db().write('users', username, user_data)


def user_exists(username):
    return get_db().has_key('users', username)