using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using static Guidaoji.Camera.CHCNetSDK;

namespace Guidaoji.Camera
{
    public class CHNetHelp
    {
        private int counter = 0;
        private static CHNetHelp _instance;
        // 私有构造函数以防止外部实例化
        public CHNetHelp() { }
        //海康辅助函数：add by lee start
        private static uint iLastErr = 0;
        private static Int32 m_lUserID = -1;
        private static bool m_bInitSDK = false;
        private static bool m_bRecord = false;
        private static bool m_bTalk = false;
        private static Int32 m_lRealHandle = -1;//m_lRealHandle
        private static int lVoiceComHandle = -1;
        private static string str;
        //相机参数通过PtzGet()获得
        private static float WPanPos, WTiltPos, WZoomPos;
        private static bool m_param_get_flag = false;//当获取成功后设置为true
        private static int[] iChannelNum = new int[96];

        // 公共静态方法用于获取类的实例
        public static CHNetHelp GetInstance()
        {
            if (_instance == null)
            {
                _instance = new CHNetHelp();
            }
            return _instance;
        }


        //登录相关
        static CHCNetSDK.REALDATACALLBACK RealData = null;
        static CHCNetSDK.LOGINRESULTCALLBACK LoginCallBack = null;
        public static CHCNetSDK.NET_DVR_PTZPOS m_struPtzCfg;
        public static CHCNetSDK.NET_DVR_USER_LOGIN_INFO struLogInfo;
        public static CHCNetSDK.NET_DVR_DEVICEINFO_V40 DeviceInfo;

        public delegate void UpdateTextStatusCallback(string strLogStatus, IntPtr lpDeviceInfo);

        //云台相关
        private bool bAuto = false;
        //private uint iLastErr = 0;
        public static int PreSetNo = 0;
        //public CHCNetSDK.NET_DVR_PTZPOS m_struPtzCfg;
        public static CHCNetSDK.NET_DVR_PTZSCOPE m_struPtzCfg1;
        public static CHCNetSDK.NET_DVR_PRESET_NAME[] m_struPreSetCfg = new CHCNetSDK.NET_DVR_PRESET_NAME[300];

        public static void cbLoginCallBack(int lUserID, int dwResult, IntPtr lpDeviceInfo, IntPtr pUser)
        {
            string strLoginCallBack = "登录设备，lUserID：" + lUserID + "，dwResult：" + dwResult;

            if (dwResult == 0)
            {
                uint iErrCode = CHCNetSDK.NET_DVR_GetLastError();
                strLoginCallBack = strLoginCallBack + "，错误号:" + iErrCode;
            }
        }

        //初始化并用固定IP的登录
        public static bool CameraInit(string sIP, string sPassword)
        {
            PrintInfo("登录.....");
            for (int i = 0; i < 64; i++)
            {
                iChannelNum[i] = i;
            }
            m_bInitSDK = CHCNetSDK.NET_DVR_Init();
            if (m_bInitSDK == false)
            {
                //MessageBox.Show("NET_DVR_Init error!");
                return false;
            }
            else
            {
                //保存SDK日志 To save the SDK log
                CHCNetSDK.NET_DVR_SetLogToFile(3, "C:\\SdkLog\\", true);
            }
            //MessageBox.Show("camera Init m_bInitSDK=="+ m_bInitSDK);

            //登录
            // 固定的设备IP地址192.168.10.102
            string fixedIP = sIP;
            byte[] byIP = System.Text.Encoding.Default.GetBytes(fixedIP);
            struLogInfo.sDeviceAddress = new byte[129];
            byIP.CopyTo(struLogInfo.sDeviceAddress, 0);

            //设备用户名
            string fixedName = "admin";
            byte[] byUserName = System.Text.Encoding.Default.GetBytes(fixedName);
            struLogInfo.sUserName = new byte[64];
            byUserName.CopyTo(struLogInfo.sUserName, 0);

            //设备密码ch123456
            string fixedPassword = sPassword;
            byte[] byPassword = System.Text.Encoding.Default.GetBytes(fixedPassword);
            struLogInfo.sPassword = new byte[64];
            byPassword.CopyTo(struLogInfo.sPassword, 0);

            struLogInfo.wPort = ushort.Parse("8000");//设备服务端口号
            if (LoginCallBack == null)
            {
                LoginCallBack = new CHCNetSDK.LOGINRESULTCALLBACK(cbLoginCallBack);//注册回调函数                    
            }
            struLogInfo.cbLoginResult = LoginCallBack;
            struLogInfo.bUseAsynLogin = false; //是否异步登录：0- 否，1- 是 
            DeviceInfo = new CHCNetSDK.NET_DVR_DEVICEINFO_V40();

            //登录设备 Login the device
            m_lUserID = CHCNetSDK.NET_DVR_Login_V40(ref struLogInfo, ref DeviceInfo);
            if (m_lUserID < 0)
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_Login_V40 failed, error code= " + iLastErr; //登录失败，输出错误号
                //MessageBox.Show(str);
            }
            else
            {
                //登录成功
                //MessageBox.Show("Login Success!");
            }
            PrintInfo("登录结束.....");
            return true;
        }

        //显示视频画面
        //public static void StartStopLiveView(System.Windows.Forms.Panel panel, string channel, bool isStreamID = false, string streamID = "")
        //{
        //    if (m_lUserID < 0)
        //    {
        //        MessageBox.Show("Please login to the device first.");
        //        return;
        //    }

        //    if (m_lRealHandle < 0)
        //    {
        //        CHCNetSDK.NET_DVR_PREVIEWINFO lpPreviewInfo = new CHCNetSDK.NET_DVR_PREVIEWINFO();
        //        lpPreviewInfo.hPlayWnd = panel.Handle; // 预览窗口
        //        lpPreviewInfo.lChannel = Int16.Parse(channel); // 预览的设备通道

        //        lpPreviewInfo.dwStreamType = 0;//码流类型：0-主码流，1-子码流，2-码流3，3-码流4，以此类推
        //        lpPreviewInfo.dwLinkMode = 0;//连接方式：0- TCP方式，1- UDP方式，2- 多播方式，3- RTP方式，4-RTP/RTSP，5-RSTP/HTTP 
        //        lpPreviewInfo.bBlocked = true; //0- 非阻塞取流，1- 阻塞取流
        //        lpPreviewInfo.dwDisplayBufNum = 1; //播放库播放缓冲区最大缓冲帧数
        //        lpPreviewInfo.byProtoType = 0;
        //        lpPreviewInfo.byPreviewMode = 0;

        //        if (isStreamID)
        //        {
        //            lpPreviewInfo.lChannel = -1;
        //            byte[] byStreamID = System.Text.Encoding.Default.GetBytes(streamID);
        //            lpPreviewInfo.byStreamID = new byte[32];
        //            byStreamID.CopyTo(lpPreviewInfo.byStreamID, 0);
        //        }

        //        // ... 实时流回调函数和预览逻辑 ...
        //        if (RealData == null)
        //        {
        //            RealData = new CHCNetSDK.REALDATACALLBACK(RealDataCallBack);//预览实时流回调函数
        //        }

        //        m_lRealHandle = CHCNetSDK.NET_DVR_RealPlay_V40(m_lUserID, ref lpPreviewInfo, RealData, IntPtr.Zero);
        //        if (m_lRealHandle < 0)
        //        {
        //            // ... 处理预览失败逻辑 ...
        //            iLastErr = CHCNetSDK.NET_DVR_GetLastError();
        //            str = "NET_DVR_RealPlay_V40 failed, error code= " + iLastErr; //预览失败，输出错误号
        //            MessageBox.Show(str);
        //            return;
        //        }
        //    }
        //    else
        //    {
        //        // 停止预览
        //        if (CHCNetSDK.NET_DVR_StopRealPlay(m_lRealHandle))
        //        {
        //            m_lRealHandle = -1;
        //        }
        //        else
        //        {
        //            // ... 处理停止预览失败逻辑 ...
        //        }
        //    }
        //}

        //你可以定义一个方法 RealDataCallBack，它将在有新的视频数据到达时被调用。
        public static void RealDataCallBack(Int32 lRealHandle, UInt32 dwDataType, IntPtr pBuffer, UInt32 dwBufSize, IntPtr pUser)
        {
            if (dwBufSize > 0)
            {
                byte[] sData = new byte[dwBufSize];
                Marshal.Copy(pBuffer, sData, 0, (Int32)dwBufSize);

                string str = "实时流数据.ps";
                FileStream fs = new FileStream(str, FileMode.Create);
                int iLen = (int)dwBufSize;
                fs.Write(sData, 0, iLen);
                fs.Close();
            }
        }

        /// <summary>
        /// 抓拍并保存图片
        /// </summary>
        /// <param name="iSelIndex">选择通道</param>
        /// <param name="sFilePath">照片存放路径</param>
        /// <returns></returns>

        public static bool JPEG(int iSelIndex, string sFilePath)
        {
            PrintInfo("抓图开始.....");
            int lChannel = iChannelNum[iSelIndex]; //通道号 Channel number

            CHCNetSDK.NET_DVR_JPEGPARA lpJpegPara = new CHCNetSDK.NET_DVR_JPEGPARA();
            lpJpegPara.wPicQuality = 0; //图像质量 Image quality
            lpJpegPara.wPicSize = 0xff; //抓图分辨率 Picture size: 0xff-Auto(使用当前码流分辨率) 
            //抓图分辨率需要设备支持，更多取值请参考SDK文档

            //JPEG抓图保存成文件 Capture a JPEG picture
            //string sJpegPicFileName;
            //sJpegPicFileName = "filetest.jpg";//图片保存路径和文件名 the path and file name to save
            if (!CHCNetSDK.NET_DVR_CaptureJPEGPicture(m_lUserID, lChannel, ref lpJpegPara, sFilePath))
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_CaptureJPEGPicture failed, error code= " + iLastErr;
                PrintInfo(str);
                return false;
            }
            else
            {
                str = "NET_DVR_CaptureJPEGPicture succ and the saved file is " + sFilePath;
                PrintInfo(str);
            }

            //JEPG抓图，数据保存在缓冲区中 Capture a JPEG picture and save in the buffer
            uint iBuffSize = 400000; //缓冲区大小需要不小于一张图片数据的大小 The buffer size should not be less than the picture size
            byte[] byJpegPicBuffer = new byte[iBuffSize];
            uint dwSizeReturned = 0;

            if (!CHCNetSDK.NET_DVR_CaptureJPEGPicture_NEW(m_lUserID, lChannel, ref lpJpegPara, byJpegPicBuffer, iBuffSize, ref dwSizeReturned))
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_CaptureJPEGPicture_NEW failed, error code= " + iLastErr;
                PrintInfo(str);
                return false;
            }
            else
            {
                //将缓冲区里的JPEG图片数据写入文件 save the data into a file
                FileStream fs = new FileStream(sFilePath, FileMode.Create);
                int iLen = (int)dwSizeReturned;
                fs.Write(byJpegPicBuffer, 0, iLen);
                fs.Close();

                str = "NET_DVR_CaptureJPEGPicture_NEW succ and save the data in buffer to 'buffertest.jpg'.";
                PrintInfo(str);
            }
            PrintInfo("抓图结束.....");
            return true;
        }

        /// <summary>
        /// 设置摄像头移动
        /// </summary>
        /// <param name="operationType">运动类型</param>
        /// <param name="fP">水平移动</param>
        /// <param name="fT">垂直移动</param>
        /// <param name="fZ">焦距</param>
        public static bool PtzSet(OperationType operationType, float fP, float fT, float fZ)
        {
            PrintInfo("摄像头移动开始.....");
            int flag = 1;
            String str1, str2, str3;

            switch ((int)operationType)//操作类型
            {
                case 0:
                    flag = 0;
                    m_struPtzCfg.wAction = 1;

                    str1 = Convert.ToString(fP * 10);
                    m_struPtzCfg.wPanPos = (ushort)(Convert.ToUInt16(str1, 16));
                    str2 = Convert.ToString(fT * 10);
                    m_struPtzCfg.wTiltPos = (ushort)(Convert.ToUInt16(str2, 16));
                    str3 = Convert.ToString(fZ * 10);
                    m_struPtzCfg.wZoomPos = (ushort)(Convert.ToUInt16(str3, 16));
                    break;
                case 1:
                    flag = 0;
                    m_struPtzCfg.wAction = 2;

                    str1 = Convert.ToString(fP * 10);
                    m_struPtzCfg.wPanPos = (ushort)(Convert.ToUInt16(str1, 16));
                    break;
                case 2:
                    flag = 0;
                    m_struPtzCfg.wAction = 3;

                    str2 = Convert.ToString(fT * 10);
                    m_struPtzCfg.wTiltPos = (ushort)(Convert.ToUInt16(str2, 16));
                    break;
                case 3:
                    flag = 0;
                    m_struPtzCfg.wAction = 4;

                    str3 = Convert.ToString(fZ * 10);
                    m_struPtzCfg.wZoomPos = (ushort)(Convert.ToUInt16(str3, 16));
                    break;
                case 4:
                    flag = 0;
                    m_struPtzCfg.wAction = 5;

                    str1 = Convert.ToString(fP * 10);
                    m_struPtzCfg.wPanPos = (ushort)(Convert.ToUInt16(str1, 16));
                    str2 = Convert.ToString(fT * 10);
                    m_struPtzCfg.wTiltPos = (ushort)(Convert.ToUInt16(str2, 16));
                    break;
            }

            bool bFlag = false;
            if (flag == 0)
            {
                Int32 nSize = Marshal.SizeOf(m_struPtzCfg);
                IntPtr ptrPtzCfg = Marshal.AllocHGlobal(nSize);
                Marshal.StructureToPtr(m_struPtzCfg, ptrPtzCfg, false);

                if (!CHCNetSDK.NET_DVR_SetDVRConfig(m_lUserID, CHCNetSDK.NET_DVR_SET_PTZPOS, 1, ptrPtzCfg, (UInt32)nSize))
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "NET_DVR_SetDVRConfig failed, error code= " + iLastErr;
                    //设置POS参数失败
                    //MessageBox.Show(str);
                }
                else
                {
                    bFlag = true;
                    //MessageBox.Show("设置成功!");
                }
                Marshal.FreeHGlobal(ptrPtzCfg);
            }
            PrintInfo("摄像头移动结束.....");
            return bFlag;
        }

        //获取相机焦距位置相关，P,T(ilt),zoom,m_param_get_flag 设置为true;
        public static float[] PtzGet()
        {
            float[] ret = { -1F, -1F, -1F };
            UInt32 dwReturn = 0;
            Int32 nSize = Marshal.SizeOf(m_struPtzCfg);
            IntPtr ptrPtzCfg = Marshal.AllocHGlobal(nSize);
            Marshal.StructureToPtr(m_struPtzCfg, ptrPtzCfg, false);
            //获取参数失败
            if (!CHCNetSDK.NET_DVR_GetDVRConfig(m_lUserID, CHCNetSDK.NET_DVR_GET_PTZPOS, -1, ptrPtzCfg, (UInt32)nSize, ref dwReturn))
            {
                iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                str = "NET_DVR_GetDVRConfig failed, error code= " + iLastErr;
                //MessageBox.Show(str);
                return ret;
            }
            else
            {
                m_struPtzCfg = (CHCNetSDK.NET_DVR_PTZPOS)Marshal.PtrToStructure(ptrPtzCfg, typeof(CHCNetSDK.NET_DVR_PTZPOS));
                //成功获取显示ptz参数
                ushort wPanPos = Convert.ToUInt16(Convert.ToString(m_struPtzCfg.wPanPos, 16));
                ret[0] = WPanPos = wPanPos * 0.1f;
                //textBoxPanPos.Text = Convert.ToString(WPanPos);
                ushort wTiltPos = Convert.ToUInt16(Convert.ToString(m_struPtzCfg.wTiltPos, 16));
                ret[1] = WTiltPos = wTiltPos * 0.1f;
                // textBoxTiltPos.Text = Convert.ToString(WTiltPos);
                ushort wZoomPos = Convert.ToUInt16(Convert.ToString(m_struPtzCfg.wZoomPos, 16));
                ret[2] = WZoomPos = wZoomPos * 0.1f;
                //textBoxZoomPos.Text = Convert.ToString(WZoomPos);
                m_param_get_flag = true;
                return ret;
            }

        }

        /// <summary>
        /// 保存录像
        /// </summary>
        /// <param name="bTranscribe">true:开始录像；false:停止录像</param>
        /// <param name="iSelIndex">选择通道</param>
        /// <param name="sViedoPath">视频保存路径</param>
        public static bool SaveViedo(bool bTranscribe, int iSelIndex, string sViedoPath)
        {
            PrintInfo(sViedoPath);
            if (bTranscribe == true)
            {
                PrintInfo("保存录像开始.....");
                //强制I帧 Make one key frame
                int lChannel = iChannelNum[iSelIndex]; //通道号 Channel number
                CHCNetSDK.NET_DVR_MakeKeyFrame(m_lUserID, lChannel);

                //开始录像 Start recording
                if (!CHCNetSDK.NET_DVR_SaveRealData(m_lRealHandle, sViedoPath))
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "NET_DVR_SaveRealData failed, error code= " + iLastErr;
                    PrintInfo(str);
                    return false;
                }
                else
                {
                    PrintInfo("NET_DVR_SaveRealData succ!");
                    return true;
                }
            }
            else
            {
                PrintInfo("保存录像结束.....");
                //停止录像 Stop recording
                if (!CHCNetSDK.NET_DVR_StopSaveRealData(m_lRealHandle))
                {
                    iLastErr = CHCNetSDK.NET_DVR_GetLastError();
                    str = "NET_DVR_StopSaveRealData failed, error code= " + iLastErr;
                    PrintInfo(str);
                    return false;
                }
                else
                {
                    str = "NET_DVR_StopSaveRealData succ and the saved file is " + sViedoPath;
                    PrintInfo(str);
                    return true;
                }
            }
        }

        /// <summary>
        /// 移动摄像头过程
        /// </summary>
        /// <param name="operationType">控制类型</param>
        /// <param name="fP">水平移动</param>
        /// <param name="fT">垂直移动</param>
        /// <param name="fZ">焦距</param>
        /// <param name="iSelIndex">选择通道</param>
        /// <param name="sFilePath">抓拍路径</param>
        /// <returns></returns>
        public static bool SetCameraProcess(OperationType operationType, float fP, float fT, float fZ, int iSelIndex, string sFilePath)
        {
            //移动摄像头
            if (PtzSet(operationType, fP, fT, fZ))
            {
                while (true)
                {
                    float[] fCameraPose = PtzGet();
                    if (fCameraPose[0] == fP && fCameraPose[1] == fT && fCameraPose[2] == fZ)
                    {
                        break;
                    }
                    Thread.Sleep(100);
                }
                //拍照
                if (JPEG(iSelIndex, sFilePath))
                    return true;
                else return false;
            }
            else
                return false;
        }

        public static void PrintInfo(string str)
        {
            string Folder = Environment.CurrentDirectory + @"\Logs";
            string FileNamme = Environment.CurrentDirectory + @"\Logs\Info_" + DateTime.Now.ToString("yyyyMMdd") + ".txt";
            if (!System.IO.Directory.Exists(Folder))
            {
                System.IO.Directory.CreateDirectory(Folder);
            }
            using (TextWriter fw = new StreamWriter(FileNamme, true))
            {
                try
                {
                    FileInfo fi = new FileInfo(FileNamme);
                    fw.WriteLine(str);
                }
                catch (Exception ex)
                {
                    fw.WriteLine(ex.Message);
                }
                finally
                {
                    fw.Close();
                    fw.Dispose();
                }
            }
        }
    }

    /// <summary>
    /// 操作类型
    /// </summary>
    public enum OperationType
    {
        PTZ,    //倾斜+焦距
        P,      //水平运动
        T,      //上下运动
        Z,      //焦距
        PT      //倾斜运动
    }
}