using System;

using BizHawk.Common.BufferExtensions;
using BizHawk.Emulation.Common;
using BizHawk.Emulation.Common.Components.LR35902;

using BizHawk.Emulation.Cores.Consoles.Nintendo.Gameboy;
using BizHawk.Emulation.Cores.Nintendo.GBHawk;
using System.Runtime.InteropServices;

namespace BizHawk.Emulation.Cores.Nintendo.GBHawkLink
{
	[Core(
		"GBHawkLink",
		"",
		isPorted: false,
		isReleased: false)]
	[ServiceNotApplicable(typeof(IDriveLight))]
	public partial class GBHawkLink : IEmulator, ISaveRam, IDebuggable, IStatable, IInputPollable, IRegionable, ILinkable,
	ISettable<GBHawkLink.GBLinkSettings, GBHawkLink.GBLinkSyncSettings>
	{
		// we want to create two GBHawk instances that we will run concurrently
		// maybe up to 4 eventually?
		public GBHawk.GBHawk L;
		public GBHawk.GBHawk R;

		// if true, the link cable is currently connected
		private bool _cableconnected = true;

		// if true, the link cable toggle signal is currently asserted
		private bool _cablediscosignal = false;

		//[CoreConstructor("GB", "GBC")]
		public GBHawkLink(CoreComm comm, GameInfo game_L, byte[] rom_L, GameInfo game_R, byte[] rom_R, /*string gameDbFn,*/ object settings, object syncSettings)
		{
			var ser = new BasicServiceProvider(this);

			linkSettings = (GBLinkSettings)settings ?? new GBLinkSettings();
			linkSyncSettings = (GBLinkSyncSettings)syncSettings ?? new GBLinkSyncSettings();
			_controllerDeck = new GBHawkLinkControllerDeck(GBHawkControllerDeck.DefaultControllerName, GBHawkControllerDeck.DefaultControllerName);

			CoreComm = comm;

			var temp_set_L = new GBHawk.GBHawk.GBSettings();
			var temp_set_R = new GBHawk.GBHawk.GBSettings();

			var temp_sync_L = new GBHawk.GBHawk.GBSyncSettings();
			var temp_sync_R = new GBHawk.GBHawk.GBSyncSettings();

			temp_sync_L.ConsoleMode = linkSyncSettings.ConsoleMode_L;
			temp_sync_R.ConsoleMode = linkSyncSettings.ConsoleMode_R;

			temp_sync_L.DivInitialTime = linkSyncSettings.DivInitialTime_L;
			temp_sync_R.DivInitialTime = linkSyncSettings.DivInitialTime_R;
			temp_sync_L.RTCInitialTime = linkSyncSettings.RTCInitialTime_L;
			temp_sync_R.RTCInitialTime = linkSyncSettings.RTCInitialTime_R;

			L = new GBHawk.GBHawk(new CoreComm(comm.ShowMessage, comm.Notify) { CoreFileProvider = comm.CoreFileProvider },
				game_L, rom_L, temp_set_L, temp_sync_L);

			R = new GBHawk.GBHawk(new CoreComm(comm.ShowMessage, comm.Notify) { CoreFileProvider = comm.CoreFileProvider },
				game_R, rom_R, temp_set_R, temp_sync_R);

			ser.Register<IVideoProvider>(this);
			ser.Register<ISoundProvider>(this); 

			_tracer = new TraceBuffer { Header = L.cpu.TraceHeader };
			ser.Register<ITraceable>(_tracer);

			ServiceProvider = ser;

			SetupMemoryDomains();

			HardReset();

			LinkConnected = _cableconnected;
		}

		public void HardReset()
		{
			L.HardReset();
			R.HardReset();
		}

		public DisplayType Region => DisplayType.NTSC;

		public int _frame = 0;

		private readonly GBHawkLinkControllerDeck _controllerDeck;

		private readonly ITraceable _tracer;

		public bool LinkConnected { get; private set; }

		private void ExecFetch(ushort addr)
		{
			MemoryCallbacks.CallExecutes(addr, "System Bus");
		}
	}
}