import { NextRequest, NextResponse } from "next/server";
import { CLAIM_NAME, AUTH_USER_ID } from "./src/shared/config";
// import { SERVER_API_FO_URL, SERVER_API_WR_URL } from "./src/shared/config/env";

// const CLAIM_NAME = "Authorization";
// const AUTH_USER_ID = "token-id";
const serverApiUrl = process.env.NEXT_PUBLIC_CS_SERVER_API_URL;
const GEOSERVER_URL = process.env.NEXT_PUBLIC_GEOSERVER_URL || "";
const LX_GEOSERVER_URL = process.env.NEXT_PUBLIC_LX_GEOSERVER_URL || "";
const GATEWAY_URL = process.env.NEXT_PUBLIC_GATEWAY_URL || "";
// const SEWERAGE_API_URL = process.env.NEXT_PUBLIC_SEWERAGE_API_URL || "";
const BUSINESS_JUSO_API_URL = process.env.NEXT_PUBLIC_FINDADRESS_URL || "";
const AdressKey = process.env.NEXT_PRIVATE_WR_ADDRESS_KEY || "";

/** 공통: URLSearchParams의 값을 decodeURIComponent 적용하여 querystring 생성 */
function toDecodedQueryString(params: URLSearchParams): string {
  const entries: string[][] = Array.from(params.entries()).map(([k, v]) => {
    try {
      return [k, decodeURIComponent(v)] as string[];
    } catch {
      return [k, v] as string[];
    }
  });
  return new URLSearchParams(entries).toString();
}

export function middleware(req: NextRequest) {
  const pathname = req.nextUrl.pathname;
  console.log(`[Middleware] Request URL: ${req.url}`);
  const searchParams = req.nextUrl.searchParams;

  if (pathname.startsWith("/server")) {
    const decodedParams = Array.from(searchParams.entries())
      .map(([key, value]) => `${key}=${decodeURIComponent(value)}`)
      .join("&");

    const newUrl = `${serverApiUrl}${pathname.replace("/server", "")}${decodedParams ? `?${decodedParams}` : ""
      }`;
    return NextResponse.rewrite(new URL(newUrl));
  }

  if (pathname === "/") {
    console.log(" maim 화면이동 ");
    return NextResponse.redirect(new URL("/main", req.url));
  }

  if (pathname.startsWith("/attach-service")) {
    const requestHeaders = new Headers(req.headers);
    const token = req.cookies.get(CLAIM_NAME)?.value;
    const userId = req.cookies.get(AUTH_USER_ID)?.value;
    const newUrl = `${serverApiUrl}${pathname}`;
    if (token) requestHeaders.set(CLAIM_NAME, token);
    if (userId) requestHeaders.set(AUTH_USER_ID, userId);

    console.log(`[Middleware] Rewriting from '/attach-service' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl), {
      headers: requestHeaders,
    });
  }

  if (pathname.startsWith("/user-service")
    || pathname.startsWith("/cms-service")) {
    let queryParams = searchParams.toString();
    const requestHeaders = new Headers(req.headers);
    const newUrl = `${serverApiUrl}${pathname}${queryParams ? `?${queryParams}` : ""}`;

    console.log(`[Middleware] Rewriting from '/user-service' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl), {
      headers: requestHeaders,
    });
  }

  if (pathname.startsWith("/geoserver")) {
    let queryParams = searchParams.toString();
    const typename = searchParams.get("TYPENAME");
    const startYmd = searchParams.get("START_YMD") ?? null;
    const endYmd = searchParams.get("END_YMD") ?? null;
    console.log("typename  ", typename);

    let newUrl = `${GEOSERVER_URL}${pathname.replace("/geoserver", "")}${queryParams ? `?${queryParams}` : ""}`;

    if (
      typename == "hasudo:tb_il_swage_prcs_fclt" || //하수처리시설
      typename == "hasudo:tb_ms_swage_prcs_zone" || //하수처리구역
      typename == "hasudo:tb_ms_sbmrg_dngr_map" || //침수위험지도
      typename == "hasudo:tb_ms_flood_dngr_map" //도시침수지도
    ) {
      newUrl = `${GEOSERVER_URL}${pathname.replace("/geoserver", "")}${queryParams ? `?${queryParams}` : ""}`;
    } else if (
      typename == "hasudo:tb_ms_swage_ppl" || //관로
      typename == "hasudo:tb_ms_swage_mhl" || //맨홀
      typename == "hasudo:tb_ms_swage_pmstn" || //펌프장
      typename == "hasudo:tb_ms_stofcbr" //우수토실
    ) {
      newUrl = `${LX_GEOSERVER_URL}${pathname.replace("/geoserver", "")}${queryParams ? `?${queryParams}` : ""}`;
    } else if (
      typename == "hasudo:om_dt_untrt_swg_rain" || //중점우수토실
      typename == "hasudo:om_wqlt_station" || //관측소
      typename == "hasudo:tb_wr_bdst_ruse_fclt" || //재이용시설
      typename == "hasudo:tb_wr_rnwtr_utztn_fclt" || //빗물이용시설
      typename == "hasudo:tb_wr_rswtr_fclt" || //중수도시설
      typename == "hasudo:tb_wr_htdfl_fclt" || //온배수시설
      typename == "hasudo:tb_wr_ruse_fclt_dmd_co" || //수요처
      typename == "hasudo:tb_wr_tmpr_dmd_co" //잠재수요처
    ) {
      const url = req.nextUrl.clone();
      url.searchParams.set("TYPENAME", typename.replace("hasudo:", ""));
      if (startYmd) url.searchParams.set("startYmd", startYmd);
      if (endYmd) url.searchParams.set("endYmd", endYmd);
      queryParams = url.searchParams.toString();
      newUrl = `${GATEWAY_URL}/sewerage-service/api/v1/map/geometry${queryParams ? `?${queryParams}` : ""}`;
    }

    console.log(`[Middleware] Rewriting from '/geoserver' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl));
  }

  if (pathname.startsWith("/reuse-service")) {
    const queryParams = searchParams.toString();
    const newUrl = `${GATEWAY_URL}${pathname}${queryParams ? `?${queryParams}` : ""}`;
    console.log(`[Middleware] Rewriting from '/reuse-service' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl));
  } else if (pathname.startsWith("/operation-service")) {
    const queryParams = searchParams.toString();
    const newUrl = `${GATEWAY_URL}${pathname}${queryParams ? `?${queryParams}` : ""}`;
    console.log(`[Middleware] Rewriting from '/operation-service' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl));
  } else if (pathname.startsWith("/sewerage-service")) {
    const queryParams = searchParams.toString();
    const newUrl = `${GATEWAY_URL}${pathname}${queryParams ? `?${queryParams}` : ""}`;
    console.log(`[Middleware] Rewriting from '/sewerage-service' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl));
  }

  if (pathname.startsWith("/ngii-server")) {
    const decodedQuery = toDecodedQueryString(searchParams);
    const newUrl = `${process.env.NEXT_PUBLIC_NGII_URL}${pathname.replace("/ngii-server", "")}${decodedQuery ? `?${decodedQuery}` : ""}`;
    console.log(`[Middleware] Rewriting from '${pathname}' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl));
  }

  if (pathname.startsWith("/bussiness-juso-service")) {
    console.log("AdressKey ", AdressKey);
    const params = new URLSearchParams({
      currentPage: "1", // 원하는 페이지
      countPerPage: "5", // 페이지당 결과 수
      keyword: searchParams.get("keyword") || "", // 검색어(주소)
      confmKey: AdressKey, // 인증키 인터넷용 패쇄망용은 따로 발급 필요 즉 middleware에서 치환해서 사용해야할듯
      resultType: "json", // 결과 형식 기본은 xml
    });
    const newUrl = `${BUSINESS_JUSO_API_URL}?${params.toString()}`;
    console.log(`[Middleware] Request to business.juso.go.kr`);
    console.log(req.url);
    console.log(`[Middleware] Rewriting from '/business.juso.go.kr' path to: ${newUrl}`);
    return NextResponse.rewrite(new URL(newUrl));
  }

  return NextResponse.next();
}

export const config = {
  matcher: [
    "/server/:path*",
    "/user-service/:path*",
    "/cms-service/:path*",
    "/attach-service/:path*",
    "/geoserver/:path*",
    "/operation-service/:path*",
    "/reuse-service/:path*",
    "/sewerage-service/:path*",
    "/bussiness-juso-service/:path*",
    "/ngii-server/:path*",
    "/",
  ],
};