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

public interface IService { }

public static class ServiceLocator
{
	private static readonly Dictionary<Type, object> _services = new Dictionary<Type, object>();

	public static void Register<T>(T instance) where T : class
	{
		var type = typeof(T);
		if (instance == null)
		{
			Debug.LogError($"Attempt to register null service: {type.Name}");
			return;
		}
		if (_services.ContainsKey(type))
		{
			_services[type] = instance;
		}
		else
		{
			_services.Add(type, instance);
		}
	}

	public static T Get<T>() where T : class
	{
		object service;
		if (_services.TryGetValue(typeof(T), out service))
		{
			return service as T;
		}
		Debug.LogError($"Service of type {typeof(T).Name} not registered.");
		return null;
	}

	public static bool IsRegistered<T>() where T : class
	{
		return _services.ContainsKey(typeof(T));
	}
}