import { NextRequest, NextResponse } from "next/server";
import { generateCrosswordLayout } from "@/lib/arcade/crosswordEngine";
import type { CrosswordSize } from "@/types/arcade";
import { getArcadePack } from "@/services/arcadeService";

const CROSSWORD_SIZES = new Set<CrosswordSize>(["mini", "standard", "large", "extra-large"]);

export async function GET(
  request: NextRequest,
  context: { params: Promise<{ id: string }> }
) {
  const { id } = await context.params;
  const sizeValue = request.nextUrl.searchParams.get("size") ?? "standard";
  if (!CROSSWORD_SIZES.has(sizeValue as CrosswordSize)) {
    return NextResponse.json({ error: "A valid Crossword size is required." }, { status: 400 });
  }
  const pack = await getArcadePack(id);
  if (!pack || pack.gameType !== "crossword" || pack.normalized.type !== "crossword") {
    return NextResponse.json({ error: "Crossword pack not found" }, { status: 404 });
  }
  const size = sizeValue as CrosswordSize;
  return NextResponse.json(generateCrosswordLayout(pack.normalized, size, `crossword-hub-preview-v1:${id}:${size}`));
}