using System;
using System.Collections.Generic;

namespace Server.Engines.MLQuests
{
  [AttributeUsage(AttributeTargets.Class)]
  public class QuesterNameAttribute : Attribute
  {
    private static readonly Type m_Type = typeof(QuesterNameAttribute);
    private static readonly Dictionary<Type, string> m_Cache = new Dictionary<Type, string>();

    public QuesterNameAttribute(string questerName)
    {
      QuesterName = questerName;
    }

    public string QuesterName{ get; }

    public static string GetQuesterNameFor(Type t)
    {
      if (t == null)
        return "";

      if (m_Cache.TryGetValue(t, out string result))
        return result;

      object[] attributes = t.GetCustomAttributes(m_Type, false);

      return m_Cache[t] = attributes.Length != 0 ? ((QuesterNameAttribute)attributes[0]).QuesterName : t.Name;
    }
  }
}