import superjson from "superjson";
import { appendSetCookies, ensureSpotifyAccessToken } from "../helpers/spotifyServer";
import type { OutputType } from "./spotify-session_GET.schema";
import { isDownloadAllowed } from "../helpers/downloadJobs";

type SpotifyProfile = {
  id: string;
  display_name?: string;
  email?: string;
  product?: string;
  images?: Array<{ url?: string }>;
};

export async function handle(request: Request) {
  try {
    const session = await ensureSpotifyAccessToken(request);
    const headers = new Headers({ "Content-Type": "application/json", "Cache-Control": "no-store" });
    appendSetCookies(headers, session.setCookies);

    if (!session.accessToken) {
      return new Response(superjson.stringify({ connected: false } satisfies OutputType), { headers });
    }

    const response = await fetch("https://api.spotify.com/v1/me", {
      headers: { Authorization: `Bearer ${session.accessToken}` },
    });
    if (!response.ok) {
      return new Response(superjson.stringify({ connected: false } satisfies OutputType), { headers });
    }
    const profile = (await response.json()) as SpotifyProfile;
    const output: OutputType = {
      connected: true,
      accessToken: session.accessToken,
      canDownload: isDownloadAllowed(profile.id),
      profile: {
        id: profile.id,
        displayName: profile.display_name || profile.id,
        email: profile.email,
        imageUrl: profile.images?.find((image) => image.url)?.url,
        product: profile.product,
      },
    };
    return new Response(superjson.stringify(output), { headers });
  } catch (error) {
    const message = error instanceof Error ? error.message : "Unable to read Spotify session.";
    return new Response(superjson.stringify({ error: message }), { status: 500 });
  }
}