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# src/app/config.py

from pathlib import Path


def get_project_root() -> Path:
    """
    Returns the project root directory.

    Assumes this file is located at:
      <project_root>/src/app/config.py
    so we go up two parents.
    """
    return Path(__file__).resolve().parents[2]


def get_data_dir() -> Path:
    """
    Root data directory for all persisted user content.
    """
    root = get_project_root()
    data_dir = root / "data"
    data_dir.mkdir(parents=True, exist_ok=True)
    return data_dir


def get_user_dir(username: str) -> Path:
    """
    Returns the directory for a given user and ensures that
    its subfolders exist.
    """
    data_dir = get_data_dir()
    user_dir = data_dir / "users" / username
    user_dir.mkdir(parents=True, exist_ok=True)

    # create standard subfolders
    (user_dir / "decks").mkdir(parents=True, exist_ok=True)
    (user_dir / "viewers").mkdir(parents=True, exist_ok=True)
    (user_dir / "chats").mkdir(parents=True, exist_ok=True)
    (user_dir / "quizzes").mkdir(parents=True, exist_ok=True)

    return user_dir