"""Parse the "info page" rich metadata out of a full Plex metadata dict, and persist the subset that
the detail endpoints serve from the DB row.

Shared by the live info-page path (routes.plex.browse) and the background rich re-sync (plex.sync) so
the two never diverge — the same one-parser rule that keeps `people.py`'s cast handling consistent.
`rich_detail` is the pure parser; `apply_rich_detail` writes the rich-ONLY fields onto a movie/show row
(genres/directors/studio/content_rating already land from the cheap listing at `_apply_facet_fields`)."""

from app.plex import people
from app.plex.plaintext import plain_text


def rich_detail(meta: dict) -> dict:
    """Pull the info-page extras out of a full Plex metadata dict: an IMDb score + link, content
    rating, genres, director(s), studio, tagline, and cast (name/role/photo). Best-effort — any
    missing field is just omitted."""
    # Rating: IMDb-ONLY — the explicit `imdb://` entry in the Rating array, or NULL. We deliberately do
    # NOT fall back to audienceRating/rating here: that is a Plex audience score, not an IMDb score, and
    # labelling it "imdb_rating" mislabels it. The audience score is served separately (item/show detail
    # expose the `rating` column) so the UI can show it when there's no IMDb score.
    imdb_rating = None
    for r in meta.get("Rating") or []:
        if str(r.get("image") or "").startswith("imdb://"):
            try:
                imdb_rating = round(float(r.get("value")), 1)
            # silent-ok: no IMDb score, which is the common and legitimate case — the UI has a
            # separate audience score to fall back on and shows nothing if neither exists.
            except (TypeError, ValueError):
                pass
            break
    # IMDb id (tt…) from the Guid list → a clickable link.
    imdb_id = None
    for g in meta.get("Guid") or []:
        gid = str(g.get("id") or "")
        if gid.startswith("imdb://"):
            imdb_id = gid.split("imdb://", 1)[1]
            break
    return {
        "imdb_rating": imdb_rating,
        "imdb_id": imdb_id,
        "imdb_url": f"https://www.imdb.com/title/{imdb_id}/" if imdb_id else None,
        "content_rating": meta.get("contentRating"),
        "genres": [g.get("tag") for g in (meta.get("Genre") or []) if g.get("tag")][:8],
        "directors": [d.get("tag") for d in (meta.get("Director") or []) if d.get("tag")][:4],
        "studio": meta.get("studio"),
        "tagline": plain_text(meta.get("tagline")),
        "cast": people.cast_from_meta(meta),
    }


def apply_rich_detail(row, meta: dict) -> None:
    """Persist the rich-ONLY detail fields onto a movie/show row so the info page serves them from the
    DB instead of a live Plex call. Call wherever a rich metadata dict is fetched (the cast backfill +
    the info-page lazy enrich). Empty cast persists as SQL NULL (none_as_null), so an EN fallback and
    the `full_cast IS NULL` "not yet enriched" signal stay meaningful."""
    d = rich_detail(meta)
    row.imdb_rating = d["imdb_rating"]
    row.imdb_id = d["imdb_id"]
    row.tagline = d["tagline"]
    row.full_cast = d["cast"] or None