import { NextRequest } from "next/server";
import { prisma } from "@/lib/db";
import { storage } from "@/lib/storage";

export const dynamic = "force-dynamic";

const CONTENT_TYPES: Record<string, string> = {
  png: "image/png",
  jpg: "image/jpeg",
  jpeg: "image/jpeg",
  webp: "image/webp",
};

/**
 * Serve an episode's cover art to anonymous visitors, authorized by a valid,
 * still-enabled public `shareId`. Used as a fallback when the storage provider
 * doesn't expose a directly-fetchable public URL for cover art.
 */
export async function GET(
  _req: NextRequest,
  { params }: { params: Promise<{ shareId: string }> }
) {
  const { shareId } = await params;

  const episode = await prisma.episode.findUnique({
    where: { shareId },
    select: { coverArt: { select: { storageKey: true } } },
  });
  const key = episode?.coverArt?.storageKey;
  if (!key) return new Response("Not found", { status: 404 });
  if (!(await storage().exists(key))) return new Response("Not found", { status: 404 });

  const data = await storage().get(key);
  const ext = key.split(".").pop()?.toLowerCase() ?? "png";
  return new Response(data as BodyInit, {
    headers: {
      "Content-Type": CONTENT_TYPES[ext] ?? "image/png",
      "Content-Length": String(data.byteLength),
      "Cache-Control": "public, max-age=3600",
    },
  });
}