from database import execute
import bcrypt

def create_user(username, password):

    password_hash = bcrypt.hashpw(
        password.encode(),
        bcrypt.gensalt()
    ).decode()

    user_id = execute(
        """
        INSERT INTO users (username, password_hash)
        VALUES (?, ?)
        """,
        (username, password_hash)
    )

    return user_id

def verify_user(username, password):
    from database import fetch_one

    user = fetch_one(
        "SELECT * FROM users WHERE username = ?",
        (username,)
    )

    if not user:
        return None

    if bcrypt.checkpw(
        password.encode(),
        user["password_hash"].encode()
    ):
        return user["id"]

    return None