using System.Runtime.InteropServices;
using static EC.Util.CameraSDK.YuShiOriSdk;

namespace EC.Util.CameraSDK;

public class YuShiSdk : ICameraSdk
{
    #region Fields

    private IntPtr LoginId { get; set; } = IntPtr.Zero;

    private int Channel { get; } = 1;

    #endregion Fields

    public YuShiSdk(CameraInfo cameraInfo) : base(cameraInfo)
    {
    }

    #region Base Method

    public override bool Init()
    {
        bool ret = ConnectSuccess();
        if (ret) return true;
        YuShiOriSdk.NETDEV_DEVICE_LOGIN_INFO_S loginInfo = new()
        {
            szIPAddr = CameraInfo.Ip,
            dwPort = CameraInfo.Port,
            szUserName = CameraInfo.UserName,
            szPassword = CameraInfo.Password
        };
        YuShiOriSdk.NETDEV_SELOG_INFO_S logInfo = new();
        LoginId = YuShiOriSdk.NETDEV_Login_V30(ref loginInfo, ref logInfo);
        ret = ConnectSuccess();
        if (!ret) BuildException();
        //别删 NETDEV_QueryVideoChlDetailList，否则 NETDEV_PTZPreset_Other 教做人
        int pdwChlCount = 16;
        IntPtr pstVideoChlList = Marshal.AllocHGlobal(pdwChlCount * Marshal.SizeOf(typeof(NETDEV_VIDEO_CHL_DETAIL_INFO_S)));
        YuShiOriSdk.NETDEV_QueryVideoChlDetailList(LoginId, ref pdwChlCount, pstVideoChlList);
        return ret;
    }

    public override bool Destory()
    {
        bool ret = ConnectSuccess();
        if (!ret) return true;
        ret = YuShiOriSdk.NETDEV_Logout(LoginId);
        if (ret) LoginId = IntPtr.Zero;
        else BuildException();
        return ret;
    }

    public override bool ConnectSuccess()
    {
        return LoginId != IntPtr.Zero;
    }

    internal override void BuildException()
    {
        int errCode = YuShiOriSdk.NETDEV_GetLastError();
        if (errCode == 0) return;
        throw CameraException.New(CameraInfo, errCode);
    }

    #endregion Base Method

    #region Ptz Method

    public override PtzInfo GetPtzInfo()
    {
        bool ret = ConnectSuccess();
        if (!ret) return PtzInfo.Default;
        YuShiOriSdk.NETDEV_PTZ_STATUS_S entity = new();
        ret = YuShiOriSdk.NETDEV_PTZGetStatus(LoginId, Channel, ref entity);
        if (!ret) { BuildException(); return PtzInfo.Default; }
        return PtzInfo.New(entity.fPanTiltX, entity.fPanTiltY, entity.fZoomX);
    }

    public override bool TryGetPtzInfo(out PtzInfo ptzInfo)
    {
        bool ret = ConnectSuccess();
        if (!ret) { ptzInfo = PtzInfo.Default; return false; }
        YuShiOriSdk.NETDEV_PTZ_STATUS_S entity = new();
        ret = YuShiOriSdk.NETDEV_PTZGetStatus(LoginId, Channel, ref entity);
        if (!ret) { BuildException(); ptzInfo = PtzInfo.Default; return false; }
        ptzInfo = PtzInfo.New(entity.fPanTiltX, entity.fPanTiltY, entity.fZoomX);
        return true;
    }

    public override bool PtzMove(int cmd, int stop, int speed)
    {
        if (!ConnectSuccess()) return false;
        if (stop == 1) cmd = YuShiOriSdk.ALLSTOP;
        int retNum = YuShiOriSdk.NETDEV_PTZControl_Other(LoginId, Channel, cmd, speed);
        bool ret = retNum == YuShiOriSdk.TRUE;
        if (!ret) BuildException();
        return ret;
    }

    public override bool PtzPreset(int cmd, int presetId)
    {
        if (!ConnectSuccess()) return false;
        int retNum = YuShiOriSdk.NETDEV_PTZPreset_Other(LoginId, Channel, cmd, Array.Empty<byte>(), presetId);
        bool ret = retNum == YuShiOriSdk.TRUE;
        if (!ret) BuildException();
        return ret;
    }

    #endregion Ptz Method

    #region Video Method

    private IntPtr RealplayHandle { get; set; } = IntPtr.Zero;

    public override void StartPlay(IntPtr hwnd)
    {
        if (!ConnectSuccess() || IsPlaying()) return;
        YuShiOriSdk.NETDEV_PREVIEWINFO_S stPreviewInfo = new()
        {
            hPlayWnd = hwnd,
            dwChannelID = Channel,
            dwStreamType = 0, // YuShiOriSdk.NETDEV_LIVE_STREAM_INDEX_E
            dwLinkMode = 1, // YuShiOriSdk.NETDEV_PROTOCAL_E
            dwFluency = 0, // YuShiOriSdk.NETDEV_PICTURE_FLUENCY_E
        };
        RealplayHandle = YuShiOriSdk.NETDEV_RealPlay(LoginId, ref stPreviewInfo, IntPtr.Zero, IntPtr.Zero);
        if (RealplayHandle == IntPtr.Zero) BuildException();
    }

    public override void StopPlay()
    {
        if (!IsPlaying()) return;
        int ret = YuShiOriSdk.NETDEV_StopRealPlay(RealplayHandle);
        RealplayHandle = IntPtr.Zero;
        if (ret == YuShiOriSdk.FALSE) BuildException();
    }

    public override bool IsPlaying()
    {
        return RealplayHandle != IntPtr.Zero;
    }

    #endregion Video Method
}