#!/usr/bin/env python3
"""Создаёт и проверяет HDD-fixture группового F8."""

from __future__ import annotations

import pathlib
import sys


def create(root: pathlib.Path) -> None:
    panel = root / "GDEL"
    panel.mkdir(parents=True)
    (panel / "A.TXT").write_bytes(b"delete A\r\n")
    (panel / "B.BIN").write_bytes(b"delete B payload\r\n")
    (panel / "KEEP.TXT").write_bytes(b"keep payload\r\n")
    directory = panel / "ADIR"
    directory.mkdir()
    (directory / "INSIDE.TXT").write_bytes(b"directory payload\r\n")
    (panel / "EMPTYDIR").mkdir()


def verify(root: pathlib.Path) -> None:
    panel = root / "GDEL"
    failures: list[str] = []

    for name in ("A.TXT", "B.BIN"):
        if (panel / name).exists():
            failures.append(f"выбранный файл не удалён: {name}")
    expected = {
        "KEEP.TXT": b"keep payload\r\n",
        "ADIR/INSIDE.TXT": b"directory payload\r\n",
    }
    for name, content in expected.items():
        path = panel / name
        if not path.is_file() or path.read_bytes() != content:
            failures.append(f"сохранённый объект изменён: {name}")
    if not (panel / "EMPTYDIR").is_dir():
        failures.append("выбранный пустой каталог ошибочно удалён")

    if failures:
        for failure in failures:
            print(f"FAIL: {failure}")
        raise SystemExit(1)
    print("PASS: selected files deleted; selected directories and KEEP preserved.")


def main() -> None:
    if len(sys.argv) != 3 or sys.argv[1] not in {"create", "verify"}:
        raise SystemExit(f"usage: {sys.argv[0]} create|verify DIR")
    root = pathlib.Path(sys.argv[2])
    if sys.argv[1] == "create":
        create(root)
    else:
        verify(root)


if __name__ == "__main__":
    main()