import { NextResponse, type NextRequest } from "next/server";
import { isSnowmanAccount } from "./app/helpers/isSnowmanAccount";
import { getSession } from "@auth0/nextjs-auth0/edge";

export async function middleware(request: NextRequest) {
  const response = NextResponse.next();

  const currentSessionCookie = request.cookies.get("auth-session");
  const currentSession = currentSessionCookie
    ? JSON.parse(currentSessionCookie.value)
    : null;
  const auth0Session = await getSession(request, response);

  const isDashboardPath = request.nextUrl.pathname.startsWith("/dashboard");
  const isChamberDashboardPath =
    request.nextUrl.pathname.startsWith("/chamber-dashboard");
  const isAuthPath = request.nextUrl.pathname.startsWith("/auth");
  const isShareUrlPath = request.nextUrl.pathname.startsWith("/shareUrl");
  const isInternalProcessPath =
    request.nextUrl.pathname.startsWith("/internal-process");

  // Redirect to external tracking site for `/newtracking`
  if (request.nextUrl.pathname.startsWith("/newtracking")) {
    return NextResponse.redirect("https://gtrac.in/newtracking/");
  }

  // If `auth-session` exists but `auth0Session` is missing, clear cookies and redirect to home
  if (
    currentSession &&
    isSnowmanAccount({ userId: currentSession.data[0]?.userid }) &&
    !auth0Session &&
    !isDashboardPath
  ) {
    const newResponse = NextResponse.redirect(new URL("/", request.url));
    newResponse.cookies.set("auth-session", "", {
      path: "/",
      expires: new Date(0),
    });
    newResponse.cookies.set("username-password", "", {
      path: "/",
      expires: new Date(0),
    });
    newResponse.cookies.set("appSession", "", {
      path: "/",
      expires: new Date(0),
    });

    return newResponse;
  }

  // Handle redirects based on session presence and path
  if (
    currentSession &&
    !isDashboardPath &&
    !isChamberDashboardPath &&
    !isAuthPath &&
    !isShareUrlPath &&
    !isInternalProcessPath
  ) {
    if (auth0Session) {
      return NextResponse.redirect(new URL("/dashboard", request.url));
    } else if (currentSession.data[0]?.userid === 87205) {
      return NextResponse.redirect(
        new URL("/dashboard/all-reports/trip-report", request.url),
      );
    } else if (currentSession.data[0]?.userid === 7300) {
      return NextResponse.redirect(new URL("/chamber-dashboard", request.url));
    } else {
      return NextResponse.redirect(new URL("/dashboard", request.url));
    }
  }

  // Redirect unauthenticated users accessing dashboard paths to home
  if (
    !currentSession &&
    (isDashboardPath || isChamberDashboardPath)
  ) {
    return NextResponse.redirect(new URL("/", request.url));
  }

  response.headers.append("Access-Control-Allow-Credentials", "true");
  response.headers.append(
    "Access-Control-Allow-Origin",
    "https://gtrac:8080.in",
  );
  response.headers.append(
    "Access-Control-Allow-Methods",
    "GET,DELETE,PATCH,POST,PUT",
  );
  response.headers.append(
    "Access-Control-Allow-Headers",
    "X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version",
  );

  // Default: proceed with the request
  return response;
}

export const config = {
  matcher: ["/((?!api|_next/static|_next/image|.*\\.png$).*)"],
};