using System;
using BizHawk.Emulation.Common;
using BizHawk.Emulation.Cores.Components.M6502;

namespace BizHawk.Emulation.Cores.Consoles.Nintendo.QuickNES
{
	partial class QuickNES
	{
		public TraceBuffer Tracer { get; private set; }

		private LibQuickNES.TraceCallback _tracecb;

		private void MakeTrace(IntPtr data)
		{
			int[] s = new int[7];
			System.Runtime.InteropServices.Marshal.Copy(data, s, 0, 7);

			byte a = (byte)s[0];
			byte x = (byte)s[1];
			byte y = (byte)s[2];
			ushort sp = (ushort)s[3];
			ushort pc = (ushort)s[4];
			byte p = (byte)s[5];

			byte opcode = (byte)s[6];

			int notused = 0;
			string opcodeStr = MOS6502X.Disassemble(pc, out notused, (address) => _memoryDomains.SystemBus.PeekByte(address));

			Tracer.Put(string.Format(
				"{0:x4}:{1} SP:{2:x2} A:{3:x2} P:{4:x2} X:{5:x2} Y:{6:x2} ",
			pc,
			opcodeStr.PadRight(26),
			sp,
			a,
			p,
			x,
			y));

		}

		private const string TraceHeader = "PC:OP SP_A_P_X_Y ";

		private void ConnectTracer()
		{
			Tracer = new TraceBuffer { Header = TraceHeader };
			(ServiceProvider as BasicServiceProvider).Register<ITraceable>(Tracer);
			_tracecb = new LibQuickNES.TraceCallback(MakeTrace);
		}
	}
}