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

export const MAX_AUDIO_BYTES = 4 * 1024 * 1024;

export const schema = z.object({
  file: z
    .custom<File>((value) => typeof File !== "undefined" && value instanceof File, "Audio file is required")
    .refine((file) => file.size > 0, "Audio file is empty")
    .refine((file) => file.size <= MAX_AUDIO_BYTES, "Audio file exceeds the 80 MB limit")
    .refine(
      (file) =>
        file.type === "audio/mpeg" ||
        file.type === "audio/wav" ||
        file.type === "audio/x-wav" ||
        file.name.toLowerCase().endsWith(".mp3") ||
        file.name.toLowerCase().endsWith(".wav"),
      "Recognition snippet must be MP3 or WAV",
    ),
});

export type OutputType = {
  matched: boolean;
  title?: string;
  artist?: string;
  album?: string;
  releaseDate?: string;
  label?: string;
  timecode?: string;
  songLink?: string;
  artworkUrl?: string;
  spotifyUri?: string;
  spotifyUrl?: string;
  trackNumber?: number;
  discNumber?: number;
  isrc?: string;
};

export async function postIdentify(file: File, init?: RequestInit): Promise<OutputType> {
  const form = new FormData();
  form.append("file", file, file.name);

  const result = await fetch("/_api/identify", {
    method: "POST",
    body: form,
    ...init,
  });

  if (!result.ok) {
    const errorObject = superjson.parse<{ error: string }>(await result.text());
    throw new Error(errorObject.error);
  }

  return superjson.parse<OutputType>(await result.text());
}