import { NextRequest, NextResponse } from "next/server";

import { PORT, PROXY_HOST, SERVER_API_URL, SITE_ID } from "@/shared/config";

const serverApiUrl = process.env.SERVER_API_URL ?? "http://localhost:3000";

// CSP 헤더 설정 함수 (img-src만)
function addSecurityHeaders(response: NextResponse): NextResponse {
  response.headers.set("Content-Security-Policy", "img-src 'self' data: https: blob:;");
  return response;
}

export function middleware(req: NextRequest) {
  const pathname = req.nextUrl.pathname;
  const searchParams = req.nextUrl.searchParams;

  const logMessages: string[] = [
    `[Middleware Request] ${new Date().toISOString()}`,
    `[Environment]\n  Mode: ${process.env.NODE_ENV}\n  Port: ${PORT}\n  Proxy Host: ${PROXY_HOST}\n  Server API URL: ${SERVER_API_URL}\n  Site ID: ${SITE_ID}`,
    `[Request]\n  Original Pathname: ${pathname}`,
  ];

  if (pathname.startsWith("/server")) {
    const queryParams = searchParams.toString();
    const newUrl = `${serverApiUrl}${pathname.replace("/server", "")}${
      queryParams ? `?${queryParams}` : ""
    }`;

    logMessages.push(`  Rewritten URL: ${newUrl}`);
    logMessages.push("\n--------------------------------\n");
    console.log(logMessages.join("\n"));

    const response = NextResponse.rewrite(new URL(newUrl));
    return addSecurityHeaders(response);
  }

  // if (pathname === "/") {
  //   const response = NextResponse.redirect(new URL("/dashboard", req.url));
  //   return addSecurityHeaders(response);
  // }

  logMessages.push("\n--------------------------------\n");
  console.log(logMessages.join("\n"));

  const response = NextResponse.next();
  return addSecurityHeaders(response);
}

export const config = {
  matcher: ["/server/:path*", "/"],
};