"""ASCII-slug naming (no spaces, no accents) for on-disk paths and served filenames, and the
social engagement-prefix strip in title normalization."""
from app.downloads import storage
from app.titles import normalize_title


def _is_ascii_slug(s: str) -> bool:
    return s.isascii() and " " not in s


def test_sanitize_folds_accents_to_ascii():
    assert storage.sanitize("Barnabás Skriván") == "Barnabas_Skrivan"
    assert storage.sanitize("Comedy Central Magyarország") == "Comedy_Central_Magyarorszag"
    assert storage.sanitize("Marco Mobili Bútoráruház Veszprém") == "Marco_Mobili_Butoraruhaz_Veszprem"
    # Hungarian double-acute (ő/ű) and German ß.
    assert storage.sanitize("Előző Műsor") == "Elozo_Musor"
    assert storage.sanitize("Straße") == "Strasse"


def test_sanitize_output_is_pure_ascii_without_spaces():
    for name in ("Poénbomba", "Mágáné Zsuzsanna", "café déjà vu", "naïve œuvre"):
        out = storage.sanitize(name)
        assert _is_ascii_slug(out), out


def test_sanitize_non_latin_falls_back_not_crashes():
    # A title with no ASCII base collapses to the untitled fallback rather than an empty name.
    assert storage.sanitize("日本語") == "untitled"


def test_display_filename_uses_underscores_and_ascii():
    out = storage.display_filename("Amikor a férfi éhesen ér haza")
    assert out == "Amikor_a_ferfi_ehesen_er_haza"
    assert _is_ascii_slug(out)


def test_download_filename_appends_single_extension():
    from pathlib import Path

    assert storage.download_filename("Szép Videó", "mp4", Path("x.mp4")) == "Szep_Video.mp4"


def test_rel_path_is_ascii_everywhere():
    meta = storage.MediaMeta(
        video_id="abc123", title="Áristom Ödön", uploader="Hajdú Balázs", upload_date=None
    )
    rel = storage.rel_path(meta, "mp4", "plex", asset_id=7)
    assert _is_ascii_slug(rel.replace("/", ""))
    assert "Hajdu_Balazs" in rel and "Aristom_Odon" in rel
    # Shell-unpleasant chars (incl. the id brackets) never appear in a generated path.
    for bad in "[]!?*&$()'\"; |":
        assert bad not in rel


def test_rel_path_strips_exclamation_and_other_shell_chars():
    meta = storage.MediaMeta(
        video_id="abc123", title="Rovinjból! A vihar (2026) $$$", uploader="Chan", upload_date=None
    )
    rel = storage.rel_path(meta, "mp4", "plex", asset_id=1)
    assert "!" not in rel and "$" not in rel and "(" not in rel


def test_engagement_prefix_stripped():
    assert normalize_title(
        "1.6M views · 66K reactions | Amikor a férfi éhesen ér haza"
    ) == "Amikor a férfi éhesen ér haza"
    assert normalize_title("13M views · 162K reactions |Valami cím") == "Valami cím"
    assert normalize_title("500 views | Rövid") == "Rövid"


def test_engagement_prefix_does_not_touch_normal_titles():
    # A pipe that isn't an engagement prefix must survive.
    assert normalize_title("Vlog 12 | A nagy nap") == "Vlog 12 | A nagy nap"
    assert normalize_title("How I built a boat") == "How I built a boat"


def test_engagement_only_title_does_not_resurrect_the_stats():
    # A title that is ONLY the stats prefix must not fall back to the raw (stats-bearing) string.
    out = normalize_title("1.6M views · 66K reactions |")
    assert out == ""
    assert "views" not in (out or "") and "reactions" not in (out or "")


def test_prefix_plus_only_hashtags_resurrects_neither_stats_nor_hashtags():
    # stats prefix + trailing SEO hashtags → both are removed; the fallback must not bring back the
    # hashtags that rule 2 strips (nor the stats prefix).
    out = normalize_title("5 views | #foo #bar")
    assert out == ""
    assert "#foo" not in (out or "") and "views" not in (out or "")