import { prisma } from "@/lib/db";
import { signUrl } from "@/lib/r2";

export async function GET(request: Request) {
  const { searchParams } = new URL(request.url);
  const chapterId = parseInt(searchParams.get("chapterId") ?? "", 10);
  const offset = Math.max(parseInt(searchParams.get("offset") ?? "0", 10), 0);
  const limit = Math.min(Math.max(parseInt(searchParams.get("limit") ?? "7", 10), 1), 20);

  if (isNaN(chapterId)) {
    return Response.json({ error: "Missing chapterId" }, { status: 400 });
  }

  const pages = await prisma.page.findMany({
    where: { chapterId },
    orderBy: { number: "asc" },
    skip: offset,
    take: limit,
    select: { number: true, imageUrl: true },
  });

  const signedPages = await Promise.all(
    pages.map(async (p) => ({
      number: p.number,
      imageUrl: await signUrl(p.imageUrl),
    }))
  );

  return Response.json(signedPages);
}