using System;
using System.Collections.Generic;
using UnityEngine;

namespace SUISS.Core
{
	public class ServiceLocator
	{
		private static ServiceLocator Instance
		{
			get
			{
				if (ServiceLocator._instance == null)
				{
					ServiceLocator._instance = new ServiceLocator();
				}
				return ServiceLocator._instance;
			}
		}

		public static T Find<T>()
		{
			ServiceLocator instance = ServiceLocator.Instance;
			if (!instance._services.ContainsKey(typeof(T)))
			{
				UnityEngine.Debug.LogWarning("Could not find Service of type \"" + typeof(T).ToString() + "\", returning default.");
				return default(T);
			}
			object obj = instance._services[typeof(T)];
			if (ServiceLocator.CheckForHiddenNull(obj))
			{
				ServiceLocator.UnregisterServiceObject<T>();
				return default(T);
			}
			return (T)((object)obj);
		}

		public static void RegistorServiceObject<T>(T serviceObject)
		{
			ServiceLocator instance = ServiceLocator.Instance;
			if (serviceObject == null)
			{
				UnityEngine.Debug.LogError("Trying to bind null object to " + typeof(T).ToString() + "!");
				return;
			}
			if (instance._services.ContainsKey(typeof(T)))
			{
				object service = instance._services[typeof(T)];
				if (!ServiceLocator.CheckForHiddenNull(service))
				{
					UnityEngine.Debug.LogError("Interface " + typeof(T).ToString() + " already registored with service locator!");
					return;
				}
				UnityEngine.Debug.LogWarning(string.Format("Removing (hidden) 'null' UnityEngine.Object {0} from service registory", typeof(T).Name));
				ServiceLocator.UnregisterServiceObject<T>();
			}
			instance._services.Add(typeof(T), serviceObject);
		}

		public static void UnregisterServiceObject<T>()
		{
			ServiceLocator instance = ServiceLocator.Instance;
			if (!instance._services.ContainsKey(typeof(T)))
			{
				UnityEngine.Debug.LogWarning("Interface " + typeof(T).ToString() + " was not registered with service locator!");
				return;
			}
			instance._services.Remove(typeof(T));
		}

		public static bool WasRegistered<T>()
		{
			ServiceLocator instance = ServiceLocator.Instance;
			if (!instance._services.ContainsKey(typeof(T)))
			{
				return false;
			}
			object service = instance._services[typeof(T)];
			if (ServiceLocator.CheckForHiddenNull(service))
			{
				ServiceLocator.UnregisterServiceObject<T>();
				return false;
			}
			return true;
		}

		private static bool CheckForHiddenNull(object service)
		{
			return service == null || service.Equals(null);
		}

		private static ServiceLocator _instance;

		private Dictionary<Type, object> _services = new Dictionary<Type, object>();
	}
}