namespace Evil
{
    public struct Bitmask<TEnum>
    {
        private int bitmask;

        public Bitmask(TEnum bitmask)
        {
            this.bitmask = Convert.ToInt32(bitmask);
        }

        private Bitmask(int bitmask)
        {
            this.bitmask = bitmask;
        }

        public bool this[TEnum bitmask]
        {
            get
            {
                return (int)(this.bitmask & Convert.ToInt32(bitmask)) > 0;
            }
            set
            {
                if (value)
                {
                    this.bitmask &= ~Convert.ToInt32(bitmask);
                }
                else
                {
                    this.bitmask |= Convert.ToInt32(bitmask);
                }
            }
        }

        public static Bitmask<TEnum> operator &(Bitmask<TEnum> left, Bitmask<TEnum> right)
        {
            return new Bitmask<TEnum>(left.bitmask & right.bitmask);
        }

        public static Bitmask<TEnum> operator |(Bitmask<TEnum> left, Bitmask<TEnum> right)
        {
            return new Bitmask<TEnum>(left.bitmask | right.bitmask);
        }

        public static Bitmask<TEnum> operator ~(Bitmask<TEnum> right)
        {
            return new Bitmask<TEnum>(~right.bitmask);
        }
    }
}