using System.Collections.Generic;
using UnityEngine;

namespace XED
{
    public class Pair<T>
    {
        public T Item1 { get; private set; }
        public T Item2 { get; private set; }

        public Pair(T item1, T item2)
        {
            if (item1.GetHashCode() < item2.GetHashCode())
            {
                Item1 = item1;
                Item2 = item2;
            }
            else
            {
                Item1 = item2;
                Item2 = item1;
            }
        }

        public override bool Equals(object obj)
        {
            if (obj is Pair<T> other)
            {
                return EqualityComparer<T>.Default.Equals(Item1, other.Item1) && EqualityComparer<T>.Default.Equals(Item2, other.Item2);
            }
            return false;
        }

        public override int GetHashCode()
        {
            int hashItem1 = Item1 == null ? 0 : Item1.GetHashCode();
            int hashItem2 = Item2 == null ? 0 : Item2.GetHashCode();
            return hashItem1 ^ hashItem2;
        }
    }
}