from __future__ import annotations

import hashlib
import os
from pathlib import Path

import joblib


ROOT = Path(__file__).resolve().parent
ARTIFACT = ROOT / "sklearn_nopad_swallow_tail_payload.joblib"
MARKER = ROOT / "joblib_inline_array_tail_marker.txt"
EXPECTED_SHA256 = "141d2d0b175dc53671dae11994500e0cb82633ba305381b56c6af22cbbbdd5c4"


def sha256(path: Path) -> str:
    return hashlib.sha256(path.read_bytes()).hexdigest()


def main() -> None:
    os.chdir(ROOT)
    MARKER.unlink(missing_ok=True)
    digest = sha256(ARTIFACT)
    print(f"artifact={ARTIFACT.name}")
    print(f"sha256={digest}")
    if digest != EXPECTED_SHA256:
        raise SystemExit("artifact hash mismatch")

    obj = joblib.load(ARTIFACT)
    print(f"loaded_type={type(obj).__name__}")
    print(f"marker_created={MARKER.exists()}")
    if type(obj).__name__ != "FunctionTransformer":
        raise SystemExit("unexpected loaded object type")
    if not MARKER.exists():
        raise SystemExit("marker was not created")
    marker_text = MARKER.read_text().strip()
    print(marker_text)
    if marker_text != "joblib inline-array tail payload executed":
        raise SystemExit("marker text mismatch")


if __name__ == "__main__":
    main()