using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

using NetSDKCS;

namespace HH.WCS.Mobox3.AnGang.Devices {
    public class SnapDevice {
        private IntPtr _LoginID = IntPtr.Zero;
        private IntPtr _PlayID = IntPtr.Zero;
        //private fSnapRevCallBack _SnapRevCallBack;
        private NET_DEVICEINFO_Ex _DeviceInfo = new NET_DEVICEINFO_Ex();
        private bool _IsSpanCapture = false;

        //private List<int> _channalList = new List<int>();
        private int _channalMax = 0;

        public SnapDevice() {
            try {
                //_SnapRevCallBack = new fSnapRevCallBack(SnapRevCallBack);
                NETClient.Init(null, IntPtr.Zero, null);
                //NETClient.SetSnapRevCallBack(_SnapRevCallBack, IntPtr.Zero);
            }
            catch (Exception ex) {
                LogHelper.InfoEx(ex);
            }
        }

        ~SnapDevice() {
            NETClient.Cleanup();
        }

        public void LoadInfo(AppStart.Snap snap) {
            LoadInfo(snap.Ip, snap.Port, snap.Name, snap.Pwd);
        }

        public void LoadInfo(string ip, int port, string name, string pwd) {
            if (IntPtr.Zero == _LoginID) {
                ushort uPort = 0;
                try {
                    uPort = Convert.ToUInt16(port);
                }
                catch {
                    LogHelper.Info("加载Snap：端口号格式错误");
                    return;
                }
                _LoginID = NETClient.LoginWithHighLevelSecurity(ip, uPort, name, pwd, EM_LOGIN_SPAC_CAP_TYPE.TCP, IntPtr.Zero, ref _DeviceInfo);
                if (IntPtr.Zero == _LoginID) {
                    LogHelper.Info(NETClient.GetLastError());
                    return;
                }
                //_channalList.Clear();
                //for (int i = 0; i < _DeviceInfo.nChanNum; i++) {
                //    _channalList.Add(i + 1);
                //}
                _channalMax = _DeviceInfo.nChanNum;
            }
            else {
                NETClient.Logout(_LoginID);
                _LoginID = IntPtr.Zero;
                if (_IsSpanCapture) {
                    _IsSpanCapture = false;
                    
                }
            }
        }

        public bool SnapPictureToFileOK(ref string filePath, int channelIndex = 0) {
            if (channelIndex >= _channalMax) {
                LogHelper.Info($"通道数 '{channelIndex}' 超出通道总数 '{_channalMax}'");
                //filePath = string.Empty;
                return false;
            }

            //DateTime now = DateTime.Now;
            //string path = AppDomain.CurrentDomain.BaseDirectory + "image";
            //string fileName = string.Format("{0}{1}{2}{3}{4}{5}", now.Year, now.Month, now.Day, now.Hour, now.Minute, now.Second) + ".jpg";
            //filePath = path + "\\" + fileName;

            NET_SNAP_PARAMS asyncSnap = new NET_SNAP_PARAMS();
            //asyncSnap.Channel = (uint)this._channalList[channelIndex];
            asyncSnap.Channel = (uint)channelIndex;
            asyncSnap.Quality = 6;
            asyncSnap.ImageSize = 2;
            asyncSnap.mode = 0;
            asyncSnap.InterSnap = 0;

            NET_IN_SNAP_PIC_TO_FILE_PARAM inParam = new NET_IN_SNAP_PIC_TO_FILE_PARAM {
                dwSize = (uint)Marshal.SizeOf(typeof(NET_IN_SNAP_PIC_TO_FILE_PARAM)),
                stuParam = asyncSnap,
                szFilePath = filePath,
            };

            NET_OUT_SNAP_PIC_TO_FILE_PARAM outParam = new NET_OUT_SNAP_PIC_TO_FILE_PARAM() {
                dwSize = (uint)Marshal.SizeOf(typeof(NET_OUT_SNAP_PIC_TO_FILE_PARAM)),
                dwPicBufLen = 1024000,
                szPicBuf = Marshal.AllocHGlobal(1024000),
            };

            bool ret = NETClient.SnapPictureToFile(_LoginID, ref inParam, ref outParam, 1000);
            if (!ret) {
                LogHelper.Info("抓图失败");
            }
            return ret;
        }

        public bool SnapPictureOk(int channelIndex = 0) {
            if (channelIndex >= _channalMax) {
                LogHelper.Info($"通道数 '{channelIndex}' 超出通道总数 '{_channalMax}'");
                return false;
            }

            NET_SNAP_PARAMS asyncSnap = new NET_SNAP_PARAMS();
            //asyncSnap.Channel = (uint)this._channalList[channelIndex];
            asyncSnap.Channel = (uint)channelIndex;
            asyncSnap.Quality = 6;
            asyncSnap.ImageSize = 2;
            asyncSnap.mode = 0;
            asyncSnap.InterSnap = 0;
            bool ret = NETClient.SnapPictureEx(_LoginID, asyncSnap, IntPtr.Zero);
            if (!ret) {
                LogHelper.Info(NETClient.GetLastError());
                return false;
            }
            return true;
        }

        private void SnapRevCallBack(IntPtr lLoginID, IntPtr pBuf, uint RevLen, uint EncodeType, uint CmdSerial, IntPtr dwUser) {
            string path = AppDomain.CurrentDomain.BaseDirectory + "image";
            if (!Directory.Exists(path)) {
                Directory.CreateDirectory(path);
            }
            if (EncodeType == 10) //.jpg
            {
                DateTime now = DateTime.Now;
                string fileName = string.Format("{0}-{1}-{2}-{3}-{4}-{5}", now.Year, now.Month, now.Day, now.Hour, now.Minute, now.Second) + ".jpg";
                string filePath = path + "\\" + fileName;
                byte[] data = new byte[RevLen];
                Marshal.Copy(pBuf, data, 0, (int)RevLen);
                try {
                    //when the file is operate by local capture will throw expection.
                    using (FileStream stream = new FileStream(filePath, FileMode.OpenOrCreate)) {
                        stream.Write(data, 0, (int)RevLen);
                        stream.Flush();
                        stream.Dispose();
                    }
                }
                catch (Exception ex) {
                    LogHelper.InfoEx(ex);
                    return;
                }
                // 替代Demo程序的Frame图片展示
                LogHelper.Info($"保存图片到：{filePath}");
                Process.Start(filePath);
            }
        }
    }
}