"""Names that are not valid UTF-8 must not break the API."""
import json
import os
from pathlib import Path

from wordarr.fsnames import decode_path, encode_path, is_broken, readable

# a Latin-1 "ß" in an otherwise normal name, as it comes from older rips
BROKEN = os.fsdecode(b"Die drei ??? - Die Fu\xdfball-Falle")


def test_detects_and_cleans_broken_names():
    assert is_broken(BROKEN)
    assert not is_broken("Die drei ??? - Die Fußball-Falle")
    shown = readable(BROKEN)
    assert shown.startswith("Die drei ??? - Die Fu") and "�" in shown
    # the cleaned name survives the same encoding that used to raise
    json.dumps({"name": shown}, ensure_ascii=False).encode("utf-8")


def test_encoded_paths_round_trip(tmp_path):
    folder = tmp_path / BROKEN
    folder.mkdir()
    (folder / "01.mp3").write_bytes(b"x")

    encoded = encode_path(str(folder))
    json.dumps({"path": encoded}, ensure_ascii=False).encode("utf-8")  # transportable
    assert not is_broken(encoded)
    assert Path(decode_path(encoded)) == folder
    assert (Path(decode_path(encoded)) / "01.mp3").read_bytes() == b"x"


def test_plain_names_are_left_alone():
    plain = "/downloads/Die drei ??? - Die Fußball-Falle"
    assert encode_path(plain) == plain
    assert decode_path(plain) == plain
    assert readable(plain) == plain