using System;
using System.Collections.Generic;
using System.Text;

namespace Substrate
{
    public struct ChunkKey : IEquatable<ChunkKey>
    {
        public readonly int cx;
        public readonly int cz;

        public ChunkKey (int _cx, int _cz)
        {
            cx = _cx;
            cz = _cz;
        }

        public bool Equals (ChunkKey ck)
        {
            return this.cx == ck.cx && this.cz == ck.cz;
        }

        public override bool Equals (Object o)
        {
            try {
                return this == (ChunkKey)o;
            }
            catch {
                return false;
            }
        }

        public override int GetHashCode ()
        {
            int hash = 23;
            hash = hash * 37 + cx;
            hash = hash * 37 + cz;
            return hash;
        }

        public static bool operator == (ChunkKey k1, ChunkKey k2)
        {
            return k1.cx == k2.cx && k1.cz == k2.cz;
        }

        public static bool operator != (ChunkKey k1, ChunkKey k2)
        {
            return k1.cx != k2.cx || k1.cz != k2.cz;
        }

        public override string ToString ()
        {
            return "(" + cx + ", " + cz + ")";
        }
    }
}