export interface RecentRequest {
  id: number;
  title: string;
  year?: number;
  type?: string;
  statusLabel?: string;
  artwork?: { poster_url?: string; backdrop_url?: string };
  createdAt?: string | null;
}

export interface RequestSearchResult {
  title: string;
  year?: number;
  type?: string;
  requestId?: number;
  statusLabel?: string;
  requestedBy?: string | null;
  accessible?: boolean;
}

const recordValue = (value: unknown): Record<string, unknown> | null =>
  value !== null && typeof value === "object" ? (value as Record<string, unknown>) : null;

const optionalString = (value: unknown) => (typeof value === "string" ? value : undefined);
const optionalNumber = (value: unknown) => (typeof value === "number" && Number.isFinite(value) ? value : undefined);

export const normalizeRecentResults = (items: unknown): RecentRequest[] => {
  if (!Array.isArray(items)) return [];
  return items.flatMap((value) => {
    const item = recordValue(value);
    const id = optionalNumber(item?.id);
    if (!item || id === undefined) return [];
    const rawTitle = optionalString(item.title);
    const placeholder = rawTitle?.trim().toLowerCase() === `request ${id}`;
    const rawArtwork = recordValue(item.artwork);
    const artwork = rawArtwork
      ? {
          poster_url: optionalString(rawArtwork.poster_url),
          backdrop_url: optionalString(rawArtwork.backdrop_url),
        }
      : undefined;
    return [
      {
        id,
        title: !rawTitle || placeholder ? `Request #${id}` : rawTitle,
        year: optionalNumber(item.year),
        type: optionalString(item.type),
        statusLabel: optionalString(item.statusLabel),
        artwork,
        createdAt: item.createdAt === null ? null : optionalString(item.createdAt),
      },
    ];
  });
};

export const normalizeSearchResults = (items: unknown): RequestSearchResult[] => {
  if (!Array.isArray(items)) return [];
  return items.flatMap((value) => {
    const item = recordValue(value);
    const title = optionalString(item?.title);
    if (!item || !title) return [];
    return [
      {
        title,
        year: optionalNumber(item.year),
        type: optionalString(item.type),
        requestId: optionalNumber(item.requestId),
        statusLabel: optionalString(item.statusLabel),
        requestedBy: item.requestedBy === null ? null : optionalString(item.requestedBy),
        accessible: Boolean(item.accessible),
      },
    ];
  });
};