"""One Hungarian word per Plex genre.

Plex's Hungarian agent returns a MIXED vocabulary: some genres come back translated ("Dráma",
"Vígjáték"), others stay English ("Action", "Adventure", "Biography"), and a title with no HU twin has
only its English genres. The HU genre list therefore offered "Drama" beside "Dráma" and a dozen English
words. This map sends every genre word we have met — English (Plex EN agent, TMDB, IMDb) or Plex's
Hungarian — to the ONE word a Hungarian reader sees. The overlay sync writes it into `genres_hu`, and a
genre filter is read through it too, so a saved filter still holding "Action" keeps matching "Akció".

A word not in the map passes through unchanged: an unknown genre stays visible (in whatever language
Plex gave it) rather than disappearing.
"""

from collections.abc import Iterable

# Keys are matched case-insensitively (see `_BY_KEY`). The Hungarian values double as keys mapping to
# themselves, so running a list through twice changes nothing.
_HU: dict[str, str] = {
    "Action": "Akció",
    "Action & Adventure": "Akció és kaland",
    "Adventure": "Kaland",
    "Animation": "Animációs",
    "Anime": "Anime",
    "Biography": "Életrajzi",
    "Children": "Gyerek",
    "Comedy": "Vígjáték",
    "Crime": "Bűnügyi",
    "Documentary": "Dokumentum",
    "Drama": "Dráma",
    "Family": "Családi",
    "Fantasy": "Fantasy",
    "Film-Noir": "Film noir",
    "Food": "Gasztronómia",
    "Game Show": "Vetélkedő",
    "Game-Show": "Vetélkedő",
    "History": "Történelmi",
    "Home and Garden": "Otthon és kert",
    "Horror": "Horror",
    "Indie": "Független",
    "Kids": "Gyerek",
    "Martial Arts": "Harcművészet",
    "Mini-Series": "Minisorozat",
    "Music": "Zenei",
    "Musical": "Musical",
    "Mystery": "Rejtély",
    "News": "Hírek",
    "Reality": "Valóságshow",
    "Reality-TV": "Valóságshow",
    "Romance": "Romantikus",
    "Sci-Fi": "Sci-Fi",
    "Sci-Fi & Fantasy": "Sci-Fi és fantasy",
    "Science Fiction": "Sci-Fi",
    "Short": "Rövidfilm",
    "Soap": "Szappanopera",
    "Sport": "Sport",
    "Suspense": "Feszültség",
    "Talk": "Talkshow",
    "Talk Show": "Talkshow",
    "Thriller": "Thriller",
    "Travel": "Utazás",
    "TV Movie": "TV film",
    "War": "Háborús",
    "War & Politics": "Háború és politika",
    "Western": "Western",
    # Plex's own Hungarian words, pinned to themselves (and to the spelling above where they differ).
    "Akció": "Akció",
    "Animációs": "Animációs",
    "Bűnügyi": "Bűnügyi",
    "Családi": "Családi",
    "Dokumentum": "Dokumentum",
    "Dokumentumfilm": "Dokumentum",
    "Dráma": "Dráma",
    "Életrajzi": "Életrajzi",
    "Háborús": "Háborús",
    "Kaland": "Kaland",
    "Rejtély": "Rejtély",
    "Romantikus": "Romantikus",
    "Történelmi": "Történelmi",
    "TV film": "TV film",
    "Vígjáték": "Vígjáték",
    "Zene": "Zenei",
    "Zenei": "Zenei",
}
_BY_KEY = {k.casefold(): v for k, v in _HU.items()}


def hu_genre(word: str) -> str:
    """The Hungarian word for one genre; an unknown word comes back unchanged."""
    return _BY_KEY.get(word.strip().casefold(), word)


def hu_genres(words: Iterable[str] | None) -> list[str] | None:
    """A genre list in Hungarian, in its first-seen order, each word once ("Drama" + "Dráma" → one
    "Dráma"). None or empty stays None, like the listing's own `_tags`."""
    out: list[str] = []
    for w in words or ():
        hu = hu_genre(w)
        if hu not in out:
            out.append(hu)
    return out or None