import { fetchWithTimeout } from "@/lib/helpers/fetchWithTimeout";
import { NextRequest, NextResponse } from "next/server";

export const dynamic = "force-dynamic";
export const revalidate = 0;

const CACHE_MAX_AGE = "public, max-age=3600";

export async function GET(request: NextRequest) {
  const url = request.nextUrl.searchParams.get("url");
  if (!url) {
    return NextResponse.json({ error: "url is required" }, { status: 400 });
  }
  try {
    const parsed = new URL(url);
    if (!["http:", "https:"].includes(parsed.protocol)) {
      return NextResponse.json({ error: "Invalid URL" }, { status: 400 });
    }
    const res = await fetchWithTimeout(url, {
      timeoutMs: 15_000,
      headers: { Accept: "image/svg+xml, text/xml, text/plain" },
    });
    if (!res.ok) {
      return NextResponse.json(
        { error: "Failed to fetch SVG" },
        { status: res.status }
      );
    }
    const text = await res.text();
    if (!text.trim().toLowerCase().includes("<svg")) {
      return NextResponse.json(
        { error: "Response is not SVG" },
        { status: 400 }
      );
    }
    return new NextResponse(text, {
      headers: {
        "Content-Type": "image/svg+xml",
        "Cache-Control": CACHE_MAX_AGE,
      },
    });
  } catch {
    return NextResponse.json(
      { error: "Failed to fetch SVG" },
      { status: 502 }
    );
  }
}