using UnityEngine;

namespace OHM.UnityToolkit
{
	public static class ComponentsUtils
	{
		public static bool GetRequiredComponentInChildren<ComponentToFind>(Component parent, ref ComponentToFind componentToFind)
		{
			if (!IsNull(componentToFind))
			{
				return true;
			}
			componentToFind = parent.GetComponentInChildren<ComponentToFind>(true);
			return !IsNull(componentToFind);
		}

		public static bool GetRequiredComponentInParent<ComponentToFind>(Component parent, ref ComponentToFind componentToFind)
		{
			if (!IsNull(componentToFind))
			{
				return true;
			}
			componentToFind = parent.GetComponentInParent<ComponentToFind>();
			return !IsNull(componentToFind);
		}

		public static bool GetRequiredComponent<ComponentToFind>(Component parent, ref ComponentToFind componentToFind)
		{
			if (!IsNull(componentToFind))
			{
				return true;
			}
			componentToFind = parent.GetComponent<ComponentToFind>();
			return !IsNull(componentToFind);
		}

		public static ComponentToFind GetRequiredComponent<ComponentToFind>(Component parent)
		{
			return parent.GetComponent<ComponentToFind>();
		}

		private static bool IsNull<T>(T value)
		{
			if (value == null)
			{
				return true;
			}

			return value is UnityEngine.Object obj && obj == null;
		}

	}
}