using System.Collections.Generic;
using UnityEngine;

namespace RootMotion
{
	public static class LayerMaskExtensions
	{
		public static bool Contains(LayerMask mask, int layer)
		{
			return (int)mask == ((int)mask | (1 << layer));
		}

		public static LayerMask Create(params string[] layerNames)
		{
			return NamesToMask(layerNames);
		}

		public static LayerMask Create(params int[] layerNumbers)
		{
			return LayerNumbersToMask(layerNumbers);
		}

		public static LayerMask NamesToMask(params string[] layerNames)
		{
			LayerMask layerMask = 0;
			foreach (string layerName in layerNames)
			{
				layerMask = (int)layerMask | (1 << LayerMask.NameToLayer(layerName));
			}
			return layerMask;
		}

		public static LayerMask LayerNumbersToMask(params int[] layerNumbers)
		{
			LayerMask layerMask = 0;
			foreach (int num in layerNumbers)
			{
				layerMask = (int)layerMask | (1 << num);
			}
			return layerMask;
		}

		public static LayerMask Inverse(this LayerMask original)
		{
			return ~(int)original;
		}

		public static LayerMask AddToMask(this LayerMask original, params string[] layerNames)
		{
			return (int)original | (int)NamesToMask(layerNames);
		}

		public static LayerMask RemoveFromMask(this LayerMask original, params string[] layerNames)
		{
			return ~((int)(LayerMask)(~(int)original) | (int)NamesToMask(layerNames));
		}

		public static string[] MaskToNames(this LayerMask original)
		{
			List<string> list = new List<string>();
			for (int i = 0; i < 32; i++)
			{
				int num = 1 << i;
				if (((int)original & num) == num)
				{
					string text = LayerMask.LayerToName(i);
					if (!string.IsNullOrEmpty(text))
					{
						list.Add(text);
					}
				}
			}
			return list.ToArray();
		}

		public static int[] MaskToNumbers(this LayerMask original)
		{
			List<int> list = new List<int>();
			for (int i = 0; i < 32; i++)
			{
				int num = 1 << i;
				if (((int)original & num) == num)
				{
					list.Add(i);
				}
			}
			return list.ToArray();
		}

		public static string MaskToString(this LayerMask original)
		{
			return original.MaskToString(", ");
		}

		public static string MaskToString(this LayerMask original, string delimiter)
		{
			return string.Join(delimiter, original.MaskToNames());
		}
	}
}