import { createServerClient } from "@supabase/ssr";
import { cookies } from "next/headers";
import { NextResponse } from "next/server";

async function checkAdminAccess(supabase: ReturnType<typeof createServerClient>) {
  const { data: { user } } = await supabase.auth.getUser();
  if (!user) return false;

  const { data: member } = await supabase
    .from("members")
    .select("is_superuser")
    .eq("user_id", user.id)
    .single();

  return member?.is_superuser === true;
}

export async function POST(request: Request) {
  const cookieStore = await cookies();
  
  const supabase = createServerClient(
    process.env.NEXT_PUBLIC_SUPABASE_URL!,
    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
    {
      cookies: {
        getAll() {
          return cookieStore.getAll();
        },
        setAll() {},
      },
    }
  );

  const isAdmin = await checkAdminAccess(supabase);
  if (!isAdmin) {
    return NextResponse.json({ ok: false, error: "Forbidden" }, { status: 403 });
  }

  try {
    const { userId, isSuperuser } = await request.json();

    if (!userId || typeof isSuperuser !== "boolean") {
      return NextResponse.json(
        { ok: false, error: "Missing required fields" },
        { status: 400 }
      );
    }

    // Get current admin user for audit log
    const { data: { user: adminUser } } = await supabase.auth.getUser();

    // Update the member
    const { error: updateError } = await supabase
      .from("members")
      .update({ is_superuser: isSuperuser })
      .eq("user_id", userId);

    if (updateError) {
      return NextResponse.json(
        { ok: false, error: updateError.message },
        { status: 500 }
      );
    }

    // Log the action
    await supabase.from("admin_audit_log").insert({
      admin_user_id: adminUser!.id,
      action: isSuperuser ? "GRANT_SUPERUSER" : "REVOKE_SUPERUSER",
      resource_type: "user",
      resource_id: userId,
      metadata: { previousValue: !isSuperuser, newValue: isSuperuser },
    });

    return NextResponse.json({ ok: true, data: { userId, isSuperuser } });
  } catch (error) {
    return NextResponse.json(
      { ok: false, error: "Failed to update user" },
      { status: 500 }
    );
  }
}