using Qrakhen.Qamp.Core.Abstractions;
using Qrakhen.Qamp.Core.Collections;
using Qrakhen.Qamp.Core.Execution;
using Qrakhen.Qamp.Core.Values;

namespace Qrakhen.Qamp.Core.Compilation.Builders;

public class SegmentBuilder() : IBuilder<Segment>, IDebug<string>
{
   public readonly PushStack<Instruction> Instructions = new();
   public readonly PushStack<Value> Constants = new();

   public Segment Build()
   {
      return new Segment(Instructions.ToArray(), Constants.ToArray());
   }

   public string Debug(DebugLevel level = DebugLevel.None)
   {
      string str = Debugger.GetContextString(this);
      for (int i = 0; i < Instructions.Count; i++) {
         var instruction = Instructions[i];
         /*if ((instruction.Code & 0x80) == 1) {
             // dynamic
             int length = instruction.Code & (0x80 - 1);
             byte[] index = Instructions.Subset(i + 1, length).Select(n => n.Code).ToArray();
             str += $"\n    [{i:x4}]: Dynamic ({string.Join(' ', index)})";
             i += length;
         } else*/
         str += $"\n    [{i:x4}]: {instruction}".PadRight(32);
         /*if (instruction.OpCode == OpCode.Constant) {
             i++; // i know, i know
             str += $" : {Constants[Instructions.Subset(i, 8).Select(n => n.Code).ToArray().ToInt64()]}";
             i += 8;
         }*/
      }
      return str;
   }
}