from pathlib import Path

from file_ops import (
    copy_with_unique_name,
    move_with_unique_name,
    resolve_unique_path,
    wait_until_stable,
)


def test_resolve_unique_path_no_collision(tmp_path):
    result = resolve_unique_path(tmp_path, "氏名A_20260101", ".pdf")
    assert result == tmp_path / "氏名A_20260101.pdf"


def test_resolve_unique_path_with_collision(tmp_path):
    (tmp_path / "氏名A_20260101.pdf").write_bytes(b"x")

    result = resolve_unique_path(tmp_path, "氏名A_20260101", ".pdf")

    assert result == tmp_path / "氏名A_20260101(2).pdf"


def test_resolve_unique_path_with_multiple_collisions(tmp_path):
    (tmp_path / "氏名A_20260101.pdf").write_bytes(b"x")
    (tmp_path / "氏名A_20260101(2).pdf").write_bytes(b"x")

    result = resolve_unique_path(tmp_path, "氏名A_20260101", ".pdf")

    assert result == tmp_path / "氏名A_20260101(3).pdf"


def test_copy_with_unique_name_creates_dest_dir(tmp_path):
    src = tmp_path / "src.pdf"
    src.write_bytes(b"content")
    dest_dir = tmp_path / "output" / "氏名A"

    result = copy_with_unique_name(src, dest_dir, "氏名A_20260101", ".pdf")

    assert result == dest_dir / "氏名A_20260101.pdf"
    assert result.read_bytes() == b"content"
    assert src.exists()  # コピーなので元ファイルは残る


def test_move_with_unique_name_moves_source(tmp_path):
    src = tmp_path / "src.pdf"
    src.write_bytes(b"content")
    dest_dir = tmp_path / "success"

    result = move_with_unique_name(src, dest_dir, "src", ".pdf")

    assert result == dest_dir / "src.pdf"
    assert result.read_bytes() == b"content"
    assert not src.exists()  # 移動なので元ファイルは消える


def test_wait_until_stable_missing_file_returns_false(tmp_path):
    missing = tmp_path / "missing.pdf"

    result = wait_until_stable(missing, interval_sec=0, retries=3, sleep_func=lambda s: None)

    assert result is False


def test_wait_until_stable_stable_file_returns_true(tmp_path):
    path = tmp_path / "stable.pdf"
    path.write_bytes(b"1234")

    result = wait_until_stable(path, interval_sec=0, retries=3, sleep_func=lambda s: None)

    assert result is True


def test_wait_until_stable_growing_file_returns_false(tmp_path):
    path = tmp_path / "growing.pdf"
    path.write_bytes(b"1")

    call_count = {"n": 0}

    def fake_sleep(_seconds):
        call_count["n"] += 1
        path.write_bytes(b"1" * (call_count["n"] + 1))

    result = wait_until_stable(path, interval_sec=0, retries=3, sleep_func=fake_sleep)

    assert result is False