using System;
using UnityEngine;
using UnityEngine.TestTools;

namespace BracerLib.Data
{
    [Serializable, ExcludeFromCoverage]
    public struct Layer : IEquatable<Layer>
    {
        public static implicit operator int(Layer layer)
        {
            return layer.layerIndex;
        }

        [SerializeField]
        private int layerIndex;

        public int LayerIndex
        {
            get => layerIndex;
            set
            {
                if (value > 0 && value < 32)
                    layerIndex = value;
            }
        }

        public int Mask => 1 << layerIndex;

        public bool Equals(Layer other) => layerIndex == other.layerIndex;

        public override bool Equals(object obj) => obj is Layer other && Equals(other);

        public override int GetHashCode() => layerIndex;

        public static bool operator ==(Layer left, Layer right) => left.Equals(right);

        public static bool operator !=(Layer left, Layer right) => !left.Equals(right);
    }
}