#nullable enable
using System;

namespace Swan.Net.Dns {
  /// <summary>
  /// An exception thrown when the DNS query fails.
  /// </summary>
  /// <seealso cref="Exception" />
  [Serializable]
  public class DnsQueryException : Exception {
    internal DnsQueryException(String message) : base(message) {
    }

    internal DnsQueryException(String message, Exception e) : base(message, e) {
    }

    internal DnsQueryException(DnsClient.IDnsResponse response) : this(response, Format(response)) {
    }

    internal DnsQueryException(DnsClient.IDnsResponse response, String message) : base(message) => this.Response = response;

    internal DnsClient.IDnsResponse? Response {
      get;
    }

    private static String Format(DnsClient.IDnsResponse response) => $"Invalid response received with code {response.ResponseCode}";
  }
}