import { NextRequest, NextResponse } from "next/server";
import { getAdminSession } from "@/lib/admin/session";
import { getSupabaseAdminClient } from "@/lib/supabase/admin";
import { UUID_REGEX } from "@/lib/constants";

export async function DELETE(
  _request: NextRequest,
  { params }: { params: Promise<{ id: string }> },
) {
  const session = await getAdminSession();
  if (!session.isAdmin) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  const { id } = await params;

  if (!UUID_REGEX.test(id)) {
    return NextResponse.json({ error: "Invalid user ID" }, { status: 400 });
  }

  const supabase = getSupabaseAdminClient();

  // public.users first so FK cascades run before auth record removal
  const { error: dbError } = await supabase.from("users").delete().eq("id", id);
  if (dbError) {
    return NextResponse.json({ error: dbError.message }, { status: 500 });
  }

  const { error: authError } = await supabase.auth.admin.deleteUser(id);
  if (authError) {
    return NextResponse.json({ error: authError.message }, { status: 500 });
  }

  return NextResponse.json({ ok: true });
}