using System;
using System.Collections.Generic;
using System.Text;
using Sunweaver.DataPrototypes;

namespace Sunweaver.Commands.Abstracts
{
    /// <summary>
    /// An abstract class that handles the fizzle behavior for binary math operations
    /// </summary>
    abstract public class BinaryOperation : BasePair
    {
        protected VirtualMachine VM = null;

        public override void Implementation(VirtualMachine VM)
        {
            //fizzles if there aren't enough values
            if (VM.Stack.Count() < 2)
                return;

            long b = VM.Stack.Pop();
            long a = VM.Stack.Pop();

            this.VM = VM;
            Operation(a, b);
        }

        /// <summary>
        /// Child members implement this with their specifics
        /// </summary>
        /// <param name="a">top value on the int stack</param>
        /// <param name="b">second to top value on the int stack</param>
        public abstract void Operation(long a, long b);
    }
}