# © Crown-owned copyright 2025, Defence Science and Technology Laboratory UK
"""Clear the user data directory of example notebooks and copy fresh copies in."""
import filecmp
import shutil
from logging import Logger
from pathlib import Path

from primaite import getLogger, PRIMAITE_PATHS

_LOGGER: Logger = getLogger(__name__)


def should_copy_file(src: Path, dest: Path, overwrite_existing: bool) -> bool:
    """
    Determine if the file should be copied.

    :param src: The source file Path.
    :param dest: The destination file Path.
    :param overwrite_existing: A bool to toggle replacing existing edited files on or off.
    :return: True if file should be copied, otherwise False.
    """
    if not dest.is_file():
        return True

    if overwrite_existing and not filecmp.cmp(src, dest):
        return True

    return False


def run(overwrite_existing: bool = True) -> None:
    """
    Resets the demo Jupyter notebooks in the user's app notebooks directory.

    :param overwrite_existing: A bool to toggle replacing existing edited notebooks on or off.
    """
    primaite_root = Path(__file__).parent.parent
    example_notebooks_user_dir = PRIMAITE_PATHS.user_notebooks_path / "example_notebooks"
    example_notebooks_user_dir.mkdir(exist_ok=True, parents=True)

    for src_fp in primaite_root.glob("**/*.ipynb"):
        dst_fp = example_notebooks_user_dir / src_fp.name

        if should_copy_file(src_fp, dst_fp, overwrite_existing):
            print(dst_fp)
            shutil.copy2(src_fp, dst_fp)
            _LOGGER.info(f"Reset example notebook: {dst_fp}")

    src = primaite_root / "notebooks/_package_data/"
    dst = example_notebooks_user_dir / "_package_data/"

    shutil.copytree(src, dst, dirs_exist_ok=True)