using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;

using Syntriax.Engine.Core.Abstract;

namespace Syntriax.Engine.Core;

public static class HierarchyObjectExtensions
{
    public static T? FindObject<T>(this IEnumerable<IHierarchyObject> hierarchyObjects) where T : class
    {
        foreach (IHierarchyObject hierarchyObject in hierarchyObjects)
            if (hierarchyObject is T @object)
                return @object;

        return default;
    }

    public static bool TryFindObject<T>(this IEnumerable<IHierarchyObject> hierarchyObjects, [NotNullWhen(returnValue: true)] out T? behaviour) where T : class
    {
        behaviour = FindObject<T>(hierarchyObjects);
        return behaviour is not null;
    }

    public static void FindObjects<T>(this IEnumerable<IHierarchyObject> hierarchyObjects, List<T> behaviours) where T : class
    {
        behaviours.Clear();
        foreach (IHierarchyObject hierarchyObject in hierarchyObjects)
            if (hierarchyObject is T @object)
                behaviours.Add(@object);
    }
}