import { z } from "zod";
import superjson from "superjson";

export const schema = z.object({
  title: z.string().min(1),
  artist: z.string().min(1),
  album: z.string().optional(),
  isrc: z.string().optional(),
  durationMs: z.number().nonnegative().optional(),
});

export type InputType = z.infer<typeof schema>;

export type OutputType = {
  isrc?: string;
  releaseDate?: string;
  genre?: string;
  composer?: string;
  albumArtist?: string;
  artworkUrl?: string;
  lyrics?: {
    plain?: string;
    synced?: string;
  };
  musicBrainzRecordingId?: string;
  sources: string[];
};

export async function postMetadataEnrich(body: InputType): Promise<OutputType> {
  const validated = schema.parse(body);
  const response = await fetch("/_api/metadata-enrich", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: superjson.stringify(validated),
  });
  if (!response.ok) {
    const parsed = superjson.parse<{ error: string }>(await response.text());
    throw new Error(parsed.error);
  }
  return superjson.parse<OutputType>(await response.text());
}