Function findBestMatches

Source

export function findBestMatches(
  kenmeiManga: KenmeiManga,
  anilistMangaList: AniListManga[],
  config: Partial<MatchEngineConfig> = {},
): MangaMatchResult {
  const matchConfig = { ...DEFAULT_MATCH_CONFIG, ...config };

  // Calculate match scores for each AniList manga and sort descending
  const matchResults = anilistMangaList
    .map((manga) => {
      const matchScore = scoreMatch(kenmeiManga, manga, matchConfig);
      const confidence = calculateConfidence(kenmeiManga.title, manga);
      return {
        manga,
        confidence,
        isExactMatch: matchScore.isExactMatch,
        matchedField: matchScore.matchedField,
      } as const;
    })
    .sort((a, b) => b.confidence - a.confidence);

  // Take only the top matches and exclude zero-confidence entries
  const topMatches = matchResults
    .slice(0, matchConfig.maxMatches)
    .filter((m) => m.confidence > 0);

  if (topMatches.length === 0) {
    return {
      kenmeiManga,
      anilistMatches: [],
      status: "pending",
      selectedMatch: undefined,
      matchDate: new Date().toISOString(),
    };
  }

  if (topMatches[0].isExactMatch) {
    return {
      kenmeiManga,
      anilistMatches: topMatches.map(({ manga, confidence }) => ({
        id: manga.id,
        manga,
        confidence,
      })),
      status: "matched",
      selectedMatch: topMatches[0].manga,
      matchDate: new Date().toISOString(),
    };
  }

  const hasHighConfidence =
    topMatches[0].confidence >= matchConfig.confidenceThreshold &&
    (topMatches.length === 1 ||
      topMatches[0].confidence - topMatches[1].confidence > 20);

  if (hasHighConfidence) {
    return {
      kenmeiManga,
      anilistMatches: topMatches.map(({ manga, confidence }) => ({
        id: manga.id,
        manga,
        confidence,
      })),
      status: "matched",
      selectedMatch: topMatches[0].manga,
      matchDate: new Date().toISOString(),
    };
  }

  // Multiple potential matches or low confidence => pending
  return {
    kenmeiManga,
    anilistMatches: topMatches.map(({ manga, confidence }) => ({
      id: manga.id,
      manga,
      confidence,
    })),
    status: "pending",
    selectedMatch: undefined,
    matchDate: new Date().toISOString(),
  };
}
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