using BizHawk.Emulation.Common;

namespace BizHawk.Emulation.Cores.Sega.MasterSystem
{
	public sealed partial class SMS : IEmulator
	{
		public IEmulatorServiceProvider ServiceProvider { get; }

		public ControllerDefinition ControllerDefinition
		{
			get
			{
				if (IsGameGear)
				{
					return GGController;
				}

				// Sorta a hack but why not
				PortDEEnabled = SyncSettings.ControllerType == "Keyboard";

				switch(SyncSettings.ControllerType)
				{
					case "Paddle":
						return SMSPaddleController;
					case "Light Phaser":
						// scale the vertical to the display mode
						SMSLightPhaserController.FloatRanges[1] = new ControllerDefinition.FloatRange(0, Vdp.FrameHeight / 2, Vdp.FrameHeight - 1);

						return SMSLightPhaserController;
					case "Sports Pad":
						return SMSSportsPadController;
					case "Keyboard":
						return SMSKeyboardController;
					default:
						return SmsController;
				}
			}
		}

		public void FrameAdvance(IController controller, bool render, bool rendersound)
		{
			_controller = controller;
			_lagged = true;
			_frame++;
			PSG.BeginFrame(Cpu.TotalExecutedCycles);

			if (!IsGameGear)
			{
				PSG.StereoPanning = Settings.ForceStereoSeparation ? ForceStereoByte : (byte)0xFF;
			}

			if (Tracer.Enabled)
			{
				Cpu.TraceCallback = s => Tracer.Put(s);
			}
			else
			{
				Cpu.TraceCallback = null;
			}

			if (IsGameGear == false)
			{
				Cpu.NonMaskableInterrupt = controller.IsPressed("Pause");
			}

			if (IsGame3D && Settings.Fix3D)
			{
				Vdp.ExecFrame((Frame & 1) == 0);
			}
			else
			{
				Vdp.ExecFrame(render);
			}

			PSG.EndFrame(Cpu.TotalExecutedCycles);
			if (_lagged)
			{
				_lagCount++;
				_isLag = true;
			}
			else
			{
				_isLag = false;
			}
		}

	    public int Frame => _frame;

		public string SystemId => "SMS";

		public bool DeterministicEmulation => true;

		public void ResetCounters()
		{
			_frame = 0;
			_lagCount = 0;
			_isLag = false;
		}

		public CoreComm CoreComm { get; }

		public void Dispose()
		{
		}
	}
}