using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using Edge.Core.Processor;using Edge.Core.IndustryStandardInterface.Pump;
using Edge.Core.UniversalApi;
using Newtonsoft.Json;

namespace HKCarPlateRecognize_App
{
    public class HkCarPlateRecognizeApp : IAppProcessor
    {
        public string MetaConfigName { get; set; }
        private bool etcCarPlate = false;

        private string DeviceAddress { get; set; }
        private int Port { get; set; }
        private string UserName { get; set; }
        private string PassWord { get; set; }
        private int CarPlateTimeOut { get; set; }

        /// <summary>
        /// 接口返回-1表示登录失败，其他值表示返回的用户ID值
        /// </summary>
        private int _luser = -1;
        /// <summary>
        /// -1表示失败，其他值作为NET_DVR_CloseAlarmChan_V30函数的句柄参数
        /// </summary>
        private int _lHandle = -1;

        public event EventHandler<PlateCatchedEventArgs> NewCarPlateCatched;
        private Dictionary<string, DateTime> PlateLicenses = new Dictionary<string, DateTime>();

        private static NLog.Logger logger = NLog.LogManager.LoadConfiguration("NLog.config").GetLogger("HkPalteRecognize");

        private CHCNetSDK.MSGCallBack_V31 m_falarmData_V31 = null;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="deviceAddress">IP address of the device</param>
        /// <param name="port">device's listening port</param>
        /// <param name="userName"> user name used to login device</param>
        /// <param name="passWord">password used to login device</param>
        public HkCarPlateRecognizeApp(string deviceAddress, int port, string userName, string passWord, int carPlateTimeOut, string etcCarPlate)
        {
            DeviceAddress = deviceAddress;
            Port = port;
            UserName = userName;
            PassWord = passWord;
            CarPlateTimeOut = carPlateTimeOut;
            this.etcCarPlate = bool.Parse(etcCarPlate);
            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
        }

        [UniversalApi(Description = "Param ciphertext is the EtcCarPlateCatched information was encrypted with AES")]
        public async Task<bool> NewCarPlateCatchedAsync(string ciphertext)
        {
            try
            {
                string password = "27c8fa1a46baabda88d2b977de272c1f";
                string content = AesHelper.DecodeAES(ciphertext, password);
                var etcCarPlate = JsonConvert.DeserializeObject<EtcCarPlateCatched>(content);

                logger.Debug($"NewCarPlateCatchedAsync with etcCarPlate {content}");
                NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(etcCarPlate.carNumber, DateTime.ParseExact(etcCarPlate.timeStamp, "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture)));
            }
            catch (Exception ex)
            {
                logger.Error($"In NewCarPlateCatchedAsync {ex}");
                return await Task.FromResult(false);
            }

            return await Task.FromResult(true);
        }

        public async Task<bool> Start()
        {
            bool started = false;
            if (etcCarPlate)
                return await Task.FromResult(true);

            var m_bInitSDK = CHCNetSDK.NET_DVR_Init();
            if (m_falarmData_V31 == null)
                m_falarmData_V31 = new CHCNetSDK.MSGCallBack_V31(MessageCallback);

            // CHCNetSDK.NET_DVR_SetExceptionCallBack_V30(0, IntPtr.Zero, ExceptionCallBack, IntPtr.Zero);

            if (m_bInitSDK)
            {
                if (CHCNetSDK.NET_DVR_SetDVRMessageCallBack_V31(m_falarmData_V31, IntPtr.Zero))
                {
                    //_luser = NetDVRLoginV40;
                    _luser = NetDVRLoginV30();
                    if (_luser < 0)
                    {
                        uint error = CHCNetSDK.NET_DVR_GetLastError();
                        logger.Info("Failed to login device, CHCNetSDK.NET_DVR_Login_V40, err:{0}", error);
                        if (error == CHCNetSDK.NET_DVR_NETWORK_FAIL_CONNECT)
                        {
                            System.Timers.Timer reloginTimer = new System.Timers.Timer();

                            reloginTimer.Elapsed += (a, b) =>
                            {
                                logger.Debug("relogin timer elapsed");
                                reloginTimer.Enabled = false;
                                //var stringPlateLicense = DateTime.Now.Millisecond.ToString(CultureInfo.InvariantCulture);
                                //NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.Now));
                                //_luser = NetDVRLoginV40();
                                _luser = NetDVRLoginV30();
                                if (_luser < 0)
                                {
                                    uint e = CHCNetSDK.NET_DVR_GetLastError();
                                    var b1 = e == CHCNetSDK.NET_DVR_NETWORK_FAIL_CONNECT ? reloginTimer.Enabled = true : reloginTimer.Enabled = false;
                                }
                                else
                                {
                                    _lHandle = SetupAlarmChan_V41();

                                    if (_lHandle < 0)
                                    {
                                        var e = CHCNetSDK.NET_DVR_GetLastError();
                                    }
                                }
                            };
                            reloginTimer.Interval = 60000;
                            reloginTimer.Start();
                        }
                    }
                    else
                    {
                        _lHandle = SetupAlarmChan_V41();

                        if (_lHandle < 0)
                        {
                            uint error = CHCNetSDK.NET_DVR_GetLastError();
                            logger.Info("error happens when call SetupAlarmChan_V41, err:{0}", error);
                        }
                        else
                        {
                            logger.Info("HK PlateRecognizeApp started successfully");
                            started = true;
                        }
                    }
                }
            }
            return started;
        }

        public int NetDVRLoginV40()
        {
            CHCNetSDK.NET_DVR_USER_LOGIN_INFO struLoginInfo = new CHCNetSDK.NET_DVR_USER_LOGIN_INFO();
            struLoginInfo.bUseAsynLogin = 0; //同步登录方式
            struLoginInfo.sDeviceAddress = DeviceAddress;
            struLoginInfo.wPort = (ushort)Port;
            struLoginInfo.sUserName = UserName;
            struLoginInfo.sPassword = PassWord;

            CHCNetSDK.NET_DVR_DEVICEINFO_V40 deviceInfo = new CHCNetSDK.NET_DVR_DEVICEINFO_V40();
            return CHCNetSDK.NET_DVR_Login_V40(struLoginInfo, deviceInfo);
        }

        public int NetDVRLoginV30()
        {
            logger.Debug("NetDVRLoginV30 new device info");
            CHCNetSDK.NET_DVR_DEVICEINFO_V30 deviceInfov30 = new CHCNetSDK.NET_DVR_DEVICEINFO_V30();
            logger.Debug("NetDVRLoginV30 Login_V30");
            return CHCNetSDK.NET_DVR_Login_V30(DeviceAddress, Port, UserName, PassWord, ref deviceInfov30);
        }
        public int SetupAlarmChan_V41()
        {
            CHCNetSDK.NET_DVR_SETUPALARM_PARAM alarmParam = new CHCNetSDK.NET_DVR_SETUPALARM_PARAM();
            alarmParam.dwSize = (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(CHCNetSDK.NET_DVR_SETUPALARM_PARAM));
            alarmParam.byLevel = 1; //布防优先级：0- 一等级（高），1- 二等级（中）   
            alarmParam.byAlarmInfoType = 1; //上传报警信息类型: 0- 老报警信息(NET_DVR_PLATE_RESULT), 1- 新报警信息(NET_ITS_PLATE_RESULT)

            return CHCNetSDK.NET_DVR_SetupAlarmChan_V41(_luser, ref alarmParam);
        }
        public bool MessageCallback(int lCommand, ref CHCNetSDK.NET_DVR_ALARMER pAlarmer, IntPtr pAlarmInfo, uint dwBufLen, IntPtr pUser)
        {
            logger.Info("HkPlateRecognizeApp:MessageCallback, message received:{0}", lCommand);
            switch (lCommand)
            {
                case CHCNetSDK.COMM_UPLOAD_PLATE_RESULT:
                    ProcessCommAlarm_Plate(ref pAlarmer, pAlarmInfo, dwBufLen, pUser);
                    break;
                case CHCNetSDK.COMM_ITS_PLATE_RESULT:
                    ProcessCommAlarm_ITSPlate(ref pAlarmer, pAlarmInfo, dwBufLen, pUser);
                    break;
                default:
                    break;

            }
            return true;
        }

        public void ExceptionCallBack(uint dwType, int lUserID, int lHandle, IntPtr pUser)
        {
            logger.Info("HkPlateRecognizeApp::ExceptionCallBack");
        }

        private void ProcessCommAlarm_Plate(ref CHCNetSDK.NET_DVR_ALARMER pAlarmer, IntPtr pAlarmInfo, uint dwBufLen, IntPtr pUser)
        {
            try
            {


                CHCNetSDK.NET_DVR_PLATE_RESULT struPlateResultInfo = new CHCNetSDK.NET_DVR_PLATE_RESULT();
                uint dwSize = (uint)Marshal.SizeOf(struPlateResultInfo);

                struPlateResultInfo = (CHCNetSDK.NET_DVR_PLATE_RESULT)Marshal.PtrToStructure(pAlarmInfo, typeof(CHCNetSDK.NET_DVR_PLATE_RESULT));

                //保存抓拍图片
                string str = "";
                if (struPlateResultInfo.byResultType == 1 && struPlateResultInfo.dwPicLen != 0)
                {
                    str = ".\\picture\\Plate_UserID_" + pAlarmer.lUserID + "_近景图.jpg";
                    FileStream fs = new FileStream(str, FileMode.Create);
                    int iLen = (int)struPlateResultInfo.dwPicLen;
                    byte[] by = new byte[iLen];
                    Marshal.Copy(struPlateResultInfo.pBuffer1, by, 0, iLen);
                    fs.Write(by, 0, iLen);
                    fs.Close();
                }
                if (struPlateResultInfo.dwPicPlateLen != 0)
                {
                    str = ".\\picture\\Plate_UserID_" + pAlarmer.lUserID + "_车牌图.jpg";
                    FileStream fs = new FileStream(str, FileMode.Create);
                    int iLen = (int)struPlateResultInfo.dwPicPlateLen;
                    byte[] by = new byte[iLen];
                    Marshal.Copy(struPlateResultInfo.pBuffer2, by, 0, iLen);
                    fs.Write(by, 0, iLen);
                    fs.Close();
                }
                if (struPlateResultInfo.dwFarCarPicLen != 0)
                {
                    str = ".\\picture\\Plate_UserID_" + pAlarmer.lUserID + "_远景图.jpg";
                    FileStream fs = new FileStream(str, FileMode.Create);
                    int iLen = (int)struPlateResultInfo.dwFarCarPicLen;
                    byte[] by = new byte[iLen];
                    Marshal.Copy(struPlateResultInfo.pBuffer5, by, 0, iLen);
                    fs.Write(by, 0, iLen);
                    fs.Close();
                }

                //报警设备IP地址
                string strIP = System.Text.Encoding.UTF8.GetString(pAlarmer.sDeviceIP).TrimEnd('\0');

                //抓拍时间：年月日时分秒
                string strTimeYear = System.Text.Encoding.UTF8.GetString(struPlateResultInfo.byAbsTime).TrimEnd('\0');

                //上传结果
                string stringPlateLicense = System.Text.Encoding.GetEncoding("GBK").GetString(struPlateResultInfo.struPlateInfo.sLicense).TrimEnd('\0');
                string stringAlarm = "抓拍上传，" + "车牌：" + stringPlateLicense + "，车辆序号：" + struPlateResultInfo.struVehicleInfo.dwIndex;
                logger.Info("HkPlateRecognizeApp::ProcessCommAlarm_Plate strTimeTear:{0},stringPlateLicense{1}", strTimeYear, stringPlateLicense);
                lock (PlateLicenses)
                {
                    if (PlateLicenses.ContainsKey(stringPlateLicense))
                    {
                        TimeSpan timeSpan = DateTime.Now - PlateLicenses[stringPlateLicense];
                        if (timeSpan.TotalMinutes > 30)
                        {
                            PlateLicenses.Remove(stringPlateLicense);
                            PlateLicenses.Add(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss", CultureInfo.InvariantCulture));
                            NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss", CultureInfo.InvariantCulture)));
                        }
                    }
                    else
                    {
                        PlateLicenses.Add(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss", CultureInfo.InvariantCulture));
                        NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss", CultureInfo.InvariantCulture)));
                    }
                }
                //if (InvokeRequired)
                //{
                //    object[] paras = new object[3];
                //    paras[0] = strTimeYear; //当前PC系统时间为DateTime.Now.ToString();
                //    paras[1] = strIP;
                //    paras[2] = stringAlarm;
                //    listViewAlarmInfo.BeginInvoke(new UpdateListBoxCallback(UpdateClientList), paras);
                //}
                //else
                //{
                //    //创建该控件的主线程直接更新信息列表 
                //    UpdateClientList(DateTime.Now.ToString(), strIP, stringAlarm);
                //}
            }
            catch (Exception e)
            {
                logger.Info("Exception happened in ProcessCommAlarm_Plate:" + e.Message);
                //throw;
            }
        }
        private void ProcessCommAlarm_ITSPlate(ref CHCNetSDK.NET_DVR_ALARMER pAlarmer, IntPtr pAlarmInfo, uint dwBufLen, IntPtr pUser)
        {
            try
            {
                //check the existing plates to see if anything has existing for a long time, then remove it
                CheckAndRemoveTheExpiredPlate();

                CHCNetSDK.NET_ITS_PLATE_RESULT struITSPlateResult = new CHCNetSDK.NET_ITS_PLATE_RESULT();
                uint dwSize = (uint)System.Runtime.InteropServices.Marshal.SizeOf(struITSPlateResult);

                struITSPlateResult = (CHCNetSDK.NET_ITS_PLATE_RESULT)Marshal.PtrToStructure(pAlarmInfo, typeof(CHCNetSDK.NET_ITS_PLATE_RESULT));

                logger.Debug("plate info catched --1");
                //报警设备IP地址
                string strIP = System.Text.Encoding.UTF8.GetString(pAlarmer.sDeviceIP).TrimEnd('\0');
                logger.Debug("The IP address of the device:" + strIP);

                //抓拍时间：年月日时分秒
                string strTimeYear = string.Format("{0:D4}", struITSPlateResult.struSnapFirstPicTime.wYear) +
                    string.Format("{0:D2}", struITSPlateResult.struSnapFirstPicTime.byMonth) +
                    string.Format("{0:D2}", struITSPlateResult.struSnapFirstPicTime.byDay) + " "
                    + string.Format("{0:D2}", struITSPlateResult.struSnapFirstPicTime.byHour) + ":"
                    + string.Format("{0:D2}", struITSPlateResult.struSnapFirstPicTime.byMinute) + ":"
                    + string.Format("{0:D2}", struITSPlateResult.struSnapFirstPicTime.bySecond) + ":"
                    + string.Format("{0:D3}", struITSPlateResult.struSnapFirstPicTime.wMilliSec);

                //上传结果
                string stringPlateLicense = System.Text.Encoding.GetEncoding("GBK").GetString(struITSPlateResult.struPlateInfo.sLicense).TrimEnd('\0').Substring(1);
                string stringAlarm = "抓拍上传，" + "车牌：" + stringPlateLicense + "，车辆序号：" + struITSPlateResult.struVehicleInfo.dwIndex;
                logger.Info("HkPlateRecognizeApp::ProcessCommAlarm_ITSPlate strTimeTear:{0},stringPlateLicense{1}", strTimeYear, stringPlateLicense);

                lock (PlateLicenses)
                {
                    if (PlateLicenses.ContainsKey(stringPlateLicense))
                    {
                        TimeSpan timeSpan = DateTime.Now - PlateLicenses[stringPlateLicense];
                        logger.Debug("PlateLicenses contains:{0} plates,time{1},timespan minutes{2}", PlateLicenses.Count, PlateLicenses[stringPlateLicense], timeSpan.Minutes);

                        if (timeSpan.TotalMinutes > CarPlateTimeOut)
                        {
                            logger.Debug("new plate over {0} min", CarPlateTimeOut);
                            PlateLicenses.Remove(stringPlateLicense);
                            //PlateLicenses.Add(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss:fff", CultureInfo.InvariantCulture));
                            PlateLicenses.Add(stringPlateLicense, DateTime.Now);
                            NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.Now));

                            //NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss:fff", CultureInfo.InvariantCulture)));
                        }
                        else
                        {
                            logger.Debug("Ignored the plate{0}, because it was already caught at:{1}", stringPlateLicense, PlateLicenses[stringPlateLicense]);
                        }
                    }
                    else
                    {
                        //PlateLicenses.Add(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss:fff", CultureInfo.InvariantCulture));
                        //NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.ParseExact(strTimeYear, "yyyyMMdd HH:mm:ss:fff", CultureInfo.InvariantCulture)));
                        PlateLicenses.Add(stringPlateLicense, DateTime.Now);
                        NewCarPlateCatched?.Invoke(this, new PlateCatchedEventArgs(stringPlateLicense, DateTime.Now));
                    }
                }
            }
            catch (Exception e)
            {
                logger.Error("HKPlateRecongnizeApp:ProcessCommAlarm_ITSPlate exception happened: " + e.Message);
            }
        }
        /// <summary>
        /// Remove the plates which have existing for a long time
        /// </summary>
        private void CheckAndRemoveTheExpiredPlate()
        {
            var platesToRemove = new List<string>();
            lock (PlateLicenses)
            {
                foreach (var plateLicense in PlateLicenses)
                {
                    if ((DateTime.Now - plateLicense.Value).TotalMinutes > CarPlateTimeOut)
                        platesToRemove.Add(plateLicense.Key);
                }
            }
            //remove the plates
            if (platesToRemove.Count > 0)
            {
                logger.Debug("{0} plates will be removed", platesToRemove.Count);
                lock (PlateLicenses)
                {
                    foreach (var plate in platesToRemove)
                        if (PlateLicenses.ContainsKey(plate)) PlateLicenses.Remove(plate);
                }
            }
        }
        public async Task<bool> Stop()
        {
            if (_lHandle > 0)
                CHCNetSDK.NET_DVR_CloseAlarmChan_V30(_lHandle);
            if (_luser > 0)
                CHCNetSDK.NET_DVR_Logout(_luser);
            //release resoures for SDKS
            CHCNetSDK.NET_DVR_Cleanup();
            return true;
        }

        public void Init(IEnumerable<IProcessor> processors)
        {
            logger.Info("HKPlateRecongnizeApp:Init");
        }
    }
}