using System;
using System.Runtime.InteropServices;

namespace Steamworks;

public class ISteamMatchmakingPlayersResponse
{
	public delegate void AddPlayerToList(string pchName, int nScore, float flTimePlayed);

	public delegate void PlayersFailedToRespond();

	public delegate void PlayersRefreshComplete();

	[UnmanagedFunctionPointer(CallingConvention.StdCall)]
	public delegate void InternalAddPlayerToList(IntPtr pchName, int nScore, float flTimePlayed);

	[UnmanagedFunctionPointer(CallingConvention.StdCall)]
	public delegate void InternalPlayersFailedToRespond();

	[UnmanagedFunctionPointer(CallingConvention.StdCall)]
	public delegate void InternalPlayersRefreshComplete();

	[StructLayout(LayoutKind.Sequential)]
	private class VTable
	{
		[NonSerialized]
		[MarshalAs(UnmanagedType.FunctionPtr)]
		public InternalAddPlayerToList m_VTAddPlayerToList;

		[NonSerialized]
		[MarshalAs(UnmanagedType.FunctionPtr)]
		public InternalPlayersFailedToRespond m_VTPlayersFailedToRespond;

		[NonSerialized]
		[MarshalAs(UnmanagedType.FunctionPtr)]
		public InternalPlayersRefreshComplete m_VTPlayersRefreshComplete;
	}

	private VTable m_VTable;

	private IntPtr m_pVTable;

	private GCHandle m_pGCHandle;

	private AddPlayerToList m_AddPlayerToList;

	private PlayersFailedToRespond m_PlayersFailedToRespond;

	private PlayersRefreshComplete m_PlayersRefreshComplete;

	public ISteamMatchmakingPlayersResponse(AddPlayerToList onAddPlayerToList, PlayersFailedToRespond onPlayersFailedToRespond, PlayersRefreshComplete onPlayersRefreshComplete)
	{
		if (onAddPlayerToList == null || onPlayersFailedToRespond == null || onPlayersRefreshComplete == null)
		{
			throw new ArgumentNullException();
		}
		m_AddPlayerToList = onAddPlayerToList;
		m_PlayersFailedToRespond = onPlayersFailedToRespond;
		m_PlayersRefreshComplete = onPlayersRefreshComplete;
		m_VTable = new VTable
		{
			m_VTAddPlayerToList = InternalOnAddPlayerToList,
			m_VTPlayersFailedToRespond = InternalOnPlayersFailedToRespond,
			m_VTPlayersRefreshComplete = InternalOnPlayersRefreshComplete
		};
		m_pVTable = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(VTable)));
		Marshal.StructureToPtr(m_VTable, m_pVTable, fDeleteOld: false);
		m_pGCHandle = GCHandle.Alloc(m_pVTable, GCHandleType.Pinned);
	}

	~ISteamMatchmakingPlayersResponse()
	{
		if (m_pVTable != IntPtr.Zero)
		{
			Marshal.FreeHGlobal(m_pVTable);
		}
		if (m_pGCHandle.IsAllocated)
		{
			m_pGCHandle.Free();
		}
	}

	private void InternalOnAddPlayerToList(IntPtr pchName, int nScore, float flTimePlayed)
	{
		m_AddPlayerToList(InteropHelp.PtrToStringUTF8(pchName), nScore, flTimePlayed);
	}

	private void InternalOnPlayersFailedToRespond()
	{
		m_PlayersFailedToRespond();
	}

	private void InternalOnPlayersRefreshComplete()
	{
		m_PlayersRefreshComplete();
	}

	public static explicit operator IntPtr(ISteamMatchmakingPlayersResponse that)
	{
		return that.m_pGCHandle.AddrOfPinnedObject();
	}
}