using System.Net.Sockets;
using System.Runtime.InteropServices;

namespace Cis.Application.Core;

/// <summary>
/// Ptz Api
/// </summary>
public class PtzServerApi : IPtzApi, ISingleton
{
	#region Attr

	private TcpClient _tcpClient { get; set; }

	private NetworkStream _stream { get; set; }

	#endregion Attr

	public PtzServerApi()
	{
		PtzServerOptions options = App.GetOptions<PtzServerOptions>();
		_tcpClient = new TcpClient(options.Ip, options.Port);
		//创建一个 networkstream 用来写入和读取数据
		_stream = _tcpClient.GetStream();
	}

	public RequestRealControl GetPtzRrc(int cameraId)
	{
		RequestRealControl realControl = new();
		try
		{
			string recieve_string = string.Empty;
			realControl.token = 666;

			realControl.CameraInfo.cameraid = cameraId;
			realControl.Status = true;
			realControl.realControlType = RealControlType.PTZINFO_GET_;
			byte[] data = StructToByte(realControl);
			_stream.Write(data, 0, data.Length);

			byte[] recieve_byte = new byte[_tcpClient.ReceiveBufferSize];
			_stream.Read(recieve_byte, 0, (int)_tcpClient.ReceiveBufferSize);
			//stream.BeginRead(recieve_byte, 0, (int)tcp_client.ReceiveBufferSize,EndRead, stream);
			realControl = (RequestRealControl)BytetoStruct(recieve_byte, typeof(RequestRealControl));
			if (realControl.PTZPositionInfo.FT < 0)
			{
				realControl.PTZPositionInfo.FT = 3600 + realControl.PTZPositionInfo.FT;
			}
		}
		catch (Exception)
		{
			realControl = default;
		}
		return realControl;
	}

	public PtzInfo GetPtzInfo(int cameraId)
	{
		RequestRealControl rrc = GetPtzRrc(cameraId);
		PtzInfo ptzInfo = PtzInfo.New(rrc.PTZPositionInfo.FP, rrc.PTZPositionInfo.FT, rrc.PTZPositionInfo.FZ);
		return ptzInfo;
	}

	public static byte[] StructToByte(object structObj)
	{
		//获取结构体大小
		int size = Marshal.SizeOf(structObj);

		byte[] data = new byte[size];

		//分配内存空间
		IntPtr structPtr = Marshal.AllocHGlobal(size);
		// 将结构体数据复制到内存空间
		Marshal.StructureToPtr(structObj, structPtr, false);
		// 将内存空间的数据拷贝到byte数组
		Marshal.Copy(structPtr, data, 0, size);
		//释放内存
		Marshal.FreeHGlobal(structPtr);
		return data;
	}

	public static object BytetoStruct(byte[] bytes, Type type)
	{
		object obj = new object();
		try
		{
			byte[] temp = bytes;
			// 获取结构体大小
			int size = Marshal.SizeOf(type);
			if (size > bytes.Length)
				return null;
			// 分配结构体内存空间
			IntPtr structPtr = Marshal.AllocHGlobal(size);
			// 将byte数组内容拷贝到内存中
			Marshal.Copy(temp, 0, structPtr, size);

			// 将内存空间转化为目标结构体
			obj = Marshal.PtrToStructure(structPtr, type);
			//释放内存
			Marshal.FreeHGlobal(structPtr);
		}
		catch (Exception)
		{
		}
		return obj;
	}

}

#region 与ptz服务交互使用结构体

//----------------------------------------------------------------------------------------
// 与ptz服务交互使用结构体
//----------------------------------------------------------------------------------------
//注意这个属性不能少
[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
public struct RequestRealControl
{
	public int token;

	public CameraInfo CameraInfo;

	public RealControlType realControlType;

	//请求时  状态  true：开始；false：结束  答复时：true：成功；其他：失败
	public bool Status;

	public PresentInfo PresentInfo;

	public PTZPosInfo PTZPositionInfo;
	//int数组，SizeConst表示数组的个数，在转换成
	//byte数组前必须先初始化数组，再使用，初始化
	//的数组长度必须和SizeConst一致，例test = new int[6];
	//[MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
	//public int[] test;
}

[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 4)]
public struct CameraInfo
{
	public int cameraid;

	[MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
	public char[] ip;

	public ushort port;

	[MarshalAs(UnmanagedType.ByValArray, SizeConst = 80)]
	private char[] user;

	[MarshalAs(UnmanagedType.ByValArray, SizeConst = 80)]
	private char[] password;
}

[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 4)]
public struct PresentInfo
{
	public int presentNo;//预置位编号

	[MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
	private char[] PresentName; // 预置位名称
}

[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 4)]
public struct PTZPosInfo
{
	public int FP;//p信息
	public int FT;//T信息
	public int FZ;//Z信息
	public int TitlePosMin;//描述点垂直参数min
	public int ZoomPosMin;//描述点变倍参数min

	public float FHorWidth;//水平宽度 精确到小数点后两位 *10000
	public float FVerWidth;//垂直宽度 精确到小数点后两位 *10000
	public float FFold;//zoom=1没变时的焦距 精确到小数点后两位 *100

	public int CameraType;
}

public enum RealControlType
{
	MOVE_UP_ = 1,
	MOVE_DOWN_,
	MOVE_LEFT_,
	MOVE_RIGHT_,
	MOVE_LEFTUP_,
	MOVE_LEFTDOWN_,
	MOVE_RIGHTUP_,
	MOVE_RIGHTDOWN_,

	ZOOM_IN_,
	ZOOM_OUT_,
	FOCUS_NEAR_,
	FOCUS_FAR_,
	IRIS_OPEN_,
	IRIS_CLOSE_,

	PRESET_SET_,
	PRESET_CALL_,

	PTZINFO_GET_,
	PTZINFO_SET_
}

#endregion 与ptz服务交互使用结构体