using System.Collections.Generic;
using TLang.Common;

namespace TLang.Common
{
    public class BytecodeChunk
    {
        public int CurrentByteLength {get;set;}=0;
        public void Add(Instruction instruction)
        {
            var i = instruction as LabelInstruction;
            if(i != null) Offsets.Add(i.Key,CurrentByteLength);
            else {
                CurrentByteLength += instruction.CalculateLength();
                Instructions.Add(instruction);
            }
        }
        public void SetLabelable()
        {
            foreach(var item in Instructions)
            {
                var item2 = item as ILabelable;
                if(item2 != null)
                {
                    if(Offsets.ContainsKey(item2.Key)) item2.Value = Offsets[item2.Key];
                }
            }
        }
        public Dictionary<string,int> Offsets {get;set;}=new Dictionary<string, int>(); 
        public List<string> Arguments {get;set;}=new List<string>();
        public List<Instruction> Instructions {get;set;}=new List<Instruction>();
    }
}