import json
import os
import stat
from pathlib import Path

from k1link.artifacts import write_json_atomic


def test_write_json_atomic(tmp_path: Path) -> None:
    output = tmp_path / "nested" / "artifact.json"
    write_json_atomic(output, {"value": "тест"})
    assert json.loads(output.read_text(encoding="utf-8")) == {"value": "тест"}
    assert not list(output.parent.glob("*.tmp"))


def test_write_json_atomic_flushes_file_and_parent_directory(
    tmp_path: Path,
    monkeypatch,
) -> None:
    output = tmp_path / "nested" / "artifact.json"
    flushed_kinds: list[str] = []
    real_fsync = os.fsync

    def observing_fsync(descriptor: int) -> None:
        mode = os.fstat(descriptor).st_mode
        flushed_kinds.append("directory" if stat.S_ISDIR(mode) else "file")
        real_fsync(descriptor)

    monkeypatch.setattr(os, "fsync", observing_fsync)

    write_json_atomic(output, {"durable": True})

    assert flushed_kinds == ["file", "directory"]