/// Resolves the brand badge shown beside a score: Plex's
/// ratingImage/audienceRatingImage URIs, and the attributed source keys the
/// Explore catalog carries instead of them.
library;

class RatingInfo {
  final String assetPath;
  final String formattedValue;

  const RatingInfo(this.assetPath, this.formattedValue);
}

/// Parse a ratingImage URI (e.g. "rottentomatoes://image.rating.ripe")
/// together with the numeric rating value into a [RatingInfo].
///
/// Returns null if the URI is unrecognised.
RatingInfo? parseRatingImage(String? imageUri, double? value) {
  if (imageUri == null || value == null) return null;

  if (imageUri.startsWith('rottentomatoes://image.rating.')) {
    final suffix = imageUri.substring('rottentomatoes://image.rating.'.length);
    return switch (suffix) {
      'ripe' => RatingInfo(_rtFreshAsset, _percent(value)),
      'rotten' => RatingInfo(_rtRottenAsset, _percent(value)),
      'upright' => RatingInfo(_rtUprightAsset, _percent(value)),
      'spilled' => RatingInfo(_rtSpilledAsset, _percent(value)),
      _ => null,
    };
  }

  if (imageUri.startsWith('imdb://')) {
    return RatingInfo(_imdbAsset, value.toStringAsFixed(1));
  }

  if (imageUri.startsWith('themoviedb://')) {
    return RatingInfo(_tmdbAsset, _percent(value));
  }

  return null;
}

/// Whether the URI is a Rotten Tomatoes rating source.
bool isRottenTomatoes(String? imageUri) => imageUri != null && imageUri.startsWith('rottentomatoes://');

/// The same badge for a [CatalogRatingSource]-style source key.
///
/// Catalog providers attribute their scores by name (`imdb`, `tmdb`,
/// `rottenTomatoesCritic`, …) and publish no badge URI, so the icon is chosen
/// from the key. Rotten Tomatoes picks fresh/rotten and upright/spilled by the
/// 60% threshold the tomatometer itself uses — the same state Plex encodes in
/// `image.rating.ripe` / `.rotten`.
///
/// Returns null for keys with no brand badge (`critic`, `audience`, `simkl`,
/// `mal`, `anilist`, `trakt`); those stay labelled with their source name.
RatingInfo? catalogRatingInfo(String source, double value) => switch (source) {
  'imdb' => RatingInfo(_imdbAsset, value.toStringAsFixed(1)),
  'tmdb' => RatingInfo(_tmdbAsset, _percent(value)),
  'rottenTomatoes' ||
  'rottenTomatoesCritic' => RatingInfo(value >= _rottenTomatoesFresh ? _rtFreshAsset : _rtRottenAsset, _percent(value)),
  'rottenTomatoesAudience' => RatingInfo(
    value >= _rottenTomatoesFresh ? _rtUprightAsset : _rtSpilledAsset,
    _percent(value),
  ),
  _ => null,
};

const String _imdbAsset = 'assets/rating_icons/imdb.svg';
const String _tmdbAsset = 'assets/rating_icons/tmdb.svg';
const String _rtFreshAsset = 'assets/rating_icons/rt_fresh.svg';
const String _rtRottenAsset = 'assets/rating_icons/rt_rotten.svg';
const String _rtUprightAsset = 'assets/rating_icons/rt_upright.svg';
const String _rtSpilledAsset = 'assets/rating_icons/rt_spilled.svg';

/// Ratings are normalized to a 0-10 scale; Rotten Tomatoes is a percentage.
const double _rottenTomatoesFresh = 6.0;

String _percent(double value) => '${(value * 10).toStringAsFixed(0)}%';