using Mesen.Config;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace Mesen.Interop
{
	public class HistoryApi
	{
		private const string DllPath = EmuApi.DllName;

		[DllImport(DllPath)] public static extern void HistoryViewerInitialize(IntPtr windowHandle, IntPtr viewerHandle);
		[DllImport(DllPath)] public static extern void HistoryViewerRelease();

		[DllImport(DllPath)][return: MarshalAs(UnmanagedType.I1)] public static extern bool HistoryViewerEnabled();

		[DllImport(DllPath)][return: MarshalAs(UnmanagedType.I1)] public static extern bool HistoryViewerSaveMovie([MarshalAs(UnmanagedType.LPUTF8Str)] string movieFile, UInt32 startPosition, UInt32 endPosition);
		[DllImport(DllPath)][return: MarshalAs(UnmanagedType.I1)] public static extern bool HistoryViewerCreateSaveState([MarshalAs(UnmanagedType.LPUTF8Str)] string outfileFile, UInt32 position);
		[DllImport(DllPath)] public static extern void HistoryViewerSetPosition(UInt32 seekPosition);
		[DllImport(DllPath)] public static extern void HistoryViewerResumeGameplay(UInt32 seekPosition);
		
		[DllImport(DllPath)] public static extern HistoryViewerState HistoryViewerGetState();
		[DllImport(DllPath)] public static extern void HistoryViewerSetOptions(HistoryViewerOptions options);

		[DllImport(DllPath)] public static extern IntPtr HistoryViewerRegisterNotificationCallback(NotificationListener.NotificationCallback callback);
		[DllImport(DllPath)] public static extern void HistoryViewerUnregisterNotificationCallback(IntPtr notificationListener);
	}

	public struct HistoryViewerState
	{
		public UInt32 Position;
		public UInt32 Length;
		public UInt32 Volume;
		public double Fps;
		[MarshalAs(UnmanagedType.I1)] public bool IsPaused;

		public UInt32 SegmentCount;
		[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1000)]
		public UInt32[] Segments;
	}

	public struct HistoryViewerOptions
	{
		[MarshalAs(UnmanagedType.I1)] public bool IsPaused;
		public UInt32 Volume;
		public UInt32 Width;
		public UInt32 Height;
	}
}