ProofOfConcept

using UnityEngine;
using Multiton.Containers;

public static class Multiton<T> where T : SingletonOfType
{

    /// <summary>
    /// Checks within the static dictionary if it's possible to add a Singleton that exists of a certain type
    /// </summary>
    /// <param name="_singletonType"></param>
    /// <returns></returns>
    public static bool TryAddSingleton(T _singletonType)
    {
        if(!MultitonContainer.SingletonCollection.ContainsKey(_singletonType))
        {
            MultitonContainer.SingletonCollection.Add(_singletonType, _singletonType);
            Debug.LogFormat($"Succesfully added: { _singletonType.GetType() } to the static Multiton dictionary");
            return true;
        }

        return false;
    }

    /// <summary>
    /// Atttempts to return a co-responding type of singleton
    /// </summary>
    /// <returns></returns>
    public static T TryGetSingletonOfType()
    {
        foreach (object type in MultitonContainer.SingletonCollection.Values)
        {
            if (type.GetType().Equals(typeof(T)))
            {
                return (T)type;
            }
        }

        return default;
    }

    /// <summary>
    /// Attempts to remove a possibly existing Singleton based on the given parameter
    /// </summary>
    /// <param name="_singletonType"></param>
    /// <returns></returns>
    public static bool TryRemoveSingletonOfType(T _singletonType)
    {
        if(MultitonContainer.SingletonCollection.ContainsKey(_singletonType))
        {
            MultitonContainer.SingletonCollection.Remove(_singletonType);
            return true;
        }

        return false;
    }

    /// <summary>
    /// Clears the Multiton out of all the contained Singletons
    /// </summary>
    public static void ClearAllSingletons()
    {
        MultitonContainer.SingletonCollection.Clear();
    }
}