using Microsoft.Extensions.Caching.Distributed;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using NLog;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Identity.UI.Services;
using Core;

namespace LiMan.UI.Data
{
    public class LiManDataService : IDisposable
    {
        #region Private Fields

        private static IConfiguration _configuration;
        private static ILogger<LiManDataService> _logger;
        private static NLog.Logger Log = LogManager.GetCurrentClassLogger();
        private readonly IEmailSender _emailSender;
        private readonly IDistributedCache distributedCache;
        private readonly IMemoryCache memoryCache;

        /// <summary>
        /// Durata assoluta massima della cache IN SECONDI
        /// </summary>
        private int chAbsExp = 60 * 5;

        /// <summary>
        /// Durata della cache IN SECONDI in modalità inattiva (non acceduta) prima di venire rimossa
        /// NON estende oltre il tempo massimo di validità della cache (chAbsExp)
        /// </summary>
        private int chSliExp = 60 * 1;

        #endregion Private Fields

        #region Protected Fields

        protected static string connStringBBM = "";

        #endregion Protected Fields

        #region Public Fields

        public static GLS.Controllers.LicManController dbControllerGLS;

        public static DB.Controllers.DbController dbControllerNext;

        #endregion Public Fields

        #region Public Constructors

        public LiManDataService(IConfiguration configuration, ILogger<LiManDataService> logger, IMemoryCache memoryCache, IDistributedCache distributedCache, IEmailSender emailSender)
        {
            _logger = logger;
            _configuration = configuration;
            _emailSender = emailSender;
            // conf cache
            this.memoryCache = memoryCache;
            this.distributedCache = distributedCache;
            // conf DB
            string connStrGLS = _configuration.GetConnectionString("LiMan.GLS");
            string connStrDB = _configuration.GetConnectionString("LiMan.DB");
            if (string.IsNullOrEmpty(connStrDB) || string.IsNullOrEmpty(connStrGLS))
            {
                _logger.LogError("Almost one ConnString empty!");
            }
            else
            {
                dbControllerGLS = new LiMan.GLS.Controllers.LicManController(configuration);
                dbControllerNext = new LiMan.DB.Controllers.DbController(configuration);
                _logger.LogInformation("DbControllers OK");
            }
        }

        #endregion Public Constructors

        #region Private Methods

        private DistributedCacheEntryOptions cacheOpt(bool fastCache)
        {
            var numSecAbsExp = fastCache ? chAbsExp : chAbsExp * 10;
            var numSecSliExp = fastCache ? chSliExp : chSliExp * 10;
            return new DistributedCacheEntryOptions().SetAbsoluteExpiration(DateTime.Now.AddSeconds(numSecAbsExp)).SetSlidingExpiration(TimeSpan.FromSeconds(numSecSliExp));
        }

        #endregion Private Methods

        #region Protected Methods

        protected string getCacheKey(string TableName, SelectData CurrFilter)
        {
            string answ = $"{TableName}:D_{CurrFilter.DateStart:yyyyMMddHHmm}_{CurrFilter.DateEnd:yyyyMMddHHmm}";
            return answ;
        }

        #endregion Protected Methods

        #region Internal Methods

        /// <summary>
        /// Effettua sblocco di una licenza impostando data veto a oggi
        /// </summary>
        /// <param name="idxSubLic"></param>
        /// <returns></returns>
        public async Task<bool> AttivazioneUnlock(int idxSubLic)
        {
            bool fatto = dbControllerNext.AttivazioniUnlock(idxSubLic);
            await Task.Delay(1);
            return fatto;
        }
        /// <summary>
        /// Effettua sblocco di una licenza impostando data veto a oggi
        /// </summary>
        /// <param name="idxSubLic"></param>
        /// <returns></returns>
        internal async Task<bool> AttivazioneDelete(int idxSubLic)
        {
            bool fatto = dbControllerNext.AttivazioniDelete(idxSubLic);
            await Task.Delay(1);
            return fatto;
        }

        #endregion Internal Methods

        #region Public Methods

        /// <summary>
        /// Hash Redis contenente i dati MP di una specifico TYPE (es StatusMacchina, StateMachineIngressi, ...)
        /// </summary>
        /// <param name="dataType"></param>
        /// <returns></returns>
        public static string mHash(string dataType)
        {
            return $"DATA:{dataType}";
        }

        public async Task<List<GLS.DatabaseModels.AnagApplicazioni>> ApplicazioniGLSGetAll()
        {
            List<GLS.DatabaseModels.AnagApplicazioni> dbResult = new List<GLS.DatabaseModels.AnagApplicazioni>();
            string cacheKey = mHash("GLS:Applicazioni");
            string rawData;
            var redisDataList = await distributedCache.GetAsync(cacheKey);
            if (redisDataList != null)
            {
                rawData = Encoding.UTF8.GetString(redisDataList);
                dbResult = JsonConvert.DeserializeObject<List<GLS.DatabaseModels.AnagApplicazioni>>(rawData);
            }
            else
            {
                Stopwatch stopWatch = new Stopwatch();
                stopWatch.Start();
                dbResult = dbControllerGLS.GetApplicazioni();
                rawData = JsonConvert.SerializeObject(dbResult);
                redisDataList = Encoding.UTF8.GetBytes(rawData);
                await distributedCache.SetAsync(cacheKey, redisDataList, cacheOpt(true));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Trace($"Effettuata lettura da DB + caching per ApplicazioniGLSGetAll: {ts.TotalMilliseconds} ms");
            }
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> ApplicazioniGLSUpdate(GLS.DatabaseModels.AnagApplicazioni currItem)
        {
            bool done = false;
            try
            {
                done = dbControllerGLS.UpdateApplicazioni(currItem);
                await InvalidateAllCache();
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in ApplicazioniGLSUpdate:{Environment.NewLine}{exc}");
            }
            return await Task.FromResult(done);
        }

        public async Task<List<DB.DBModels.ApplicativoModel>> ApplicazioniNextGetAll()
        {
            List<DB.DBModels.ApplicativoModel> dbResult = new List<DB.DBModels.ApplicativoModel>();
            string cacheKey = mHash("Next:Applicazioni");
            string rawData;
            var redisDataList = await distributedCache.GetAsync(cacheKey);
            if (redisDataList != null)
            {
                rawData = Encoding.UTF8.GetString(redisDataList);
                dbResult = JsonConvert.DeserializeObject<List<DB.DBModels.ApplicativoModel>>(rawData);
            }
            else
            {
                Stopwatch stopWatch = new Stopwatch();
                stopWatch.Start();
                dbResult = dbControllerNext.GetApplicazioni();
                rawData = JsonConvert.SerializeObject(dbResult);
                redisDataList = Encoding.UTF8.GetBytes(rawData);
                await distributedCache.SetAsync(cacheKey, redisDataList, cacheOpt(true));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Trace($"Effettuata lettura da DB + caching per ApplicazioniNextGetAll: {ts.TotalMilliseconds} ms");
            }
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> ApplicazioniNextUpdate(DB.DBModels.ApplicativoModel currItem)
        {
            bool done = false;
            try
            {
                done = dbControllerNext.UpsertApplicazione(currItem);
                await InvalidateAllCache();
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in ApplicazioniNextUpdate:{Environment.NewLine}{exc}");
            }
            return await Task.FromResult(done);
        }

        /// <summary>
        /// Recupera attivazioni data licenza
        /// </summary>
        /// <param name="CurrFilter"></param>
        /// <returns></returns>
        public async Task<List<DB.DBModels.SubLicenzaModel>> AttivazioniGetByLic(int IdxLic)
        {
            Stopwatch stopWatch = new Stopwatch();
            List<DB.DBModels.SubLicenzaModel> dbResult = new List<DB.DBModels.SubLicenzaModel>();
            stopWatch.Start();
            dbResult = dbControllerNext.AttivazioniGetByLic(IdxLic);
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Trace($"Effettuata lettura da DB per AttivazioniGetByLic: {ts.TotalMilliseconds} ms");
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> DbForceMigrate()
        {
            return await Task.FromResult(dbControllerGLS.DbForceMigrate());
        }

        public void Dispose()
        {
            // Clear database controller
            dbControllerGLS.Dispose();
        }

        public async Task<List<GLS.DatabaseModels.AnagInstallazioni>> InstallazioniGLSGetAll()
        {
            List<GLS.DatabaseModels.AnagInstallazioni> dbResult = new List<GLS.DatabaseModels.AnagInstallazioni>();
            string cacheKey = mHash("GLS:Installazioni");
            string rawData;
            var redisDataList = await distributedCache.GetAsync(cacheKey);
            if (redisDataList != null)
            {
                rawData = Encoding.UTF8.GetString(redisDataList);
                dbResult = JsonConvert.DeserializeObject<List<GLS.DatabaseModels.AnagInstallazioni>>(rawData);
            }
            else
            {
                Stopwatch stopWatch = new Stopwatch();
                stopWatch.Start();
                dbResult = dbControllerGLS.GetInstallazioni();
                rawData = JsonConvert.SerializeObject(dbResult);
                redisDataList = Encoding.UTF8.GetBytes(rawData);
                await distributedCache.SetAsync(cacheKey, redisDataList, cacheOpt(true));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Trace($"Effettuata lettura da DB + caching per InstallazioniGLSGetAll: {ts.TotalMilliseconds} ms");
            }
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> InstallazioniGLSUpdate(GLS.DatabaseModels.AnagInstallazioni currItem)
        {
            bool done = false;
            try
            {
                done = dbControllerGLS.UpdateInstallazioni(currItem);
                await InvalidateAllCache();
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in InstallazioniGLSUpdate:{Environment.NewLine}{exc}");
            }
            return await Task.FromResult(done);
        }

        public async Task<List<DB.DBModels.InstallazioneModel>> InstallazioniNextGetAll()
        {
            List<DB.DBModels.InstallazioneModel> dbResult = new List<DB.DBModels.InstallazioneModel>();
            string cacheKey = mHash("Next:Installazioni");
            string rawData;
            var redisDataList = await distributedCache.GetAsync(cacheKey);
            if (redisDataList != null)
            {
                rawData = Encoding.UTF8.GetString(redisDataList);
                dbResult = JsonConvert.DeserializeObject<List<DB.DBModels.InstallazioneModel>>(rawData);
            }
            else
            {
                Stopwatch stopWatch = new Stopwatch();
                stopWatch.Start();
                dbResult = dbControllerNext.GetInstallazioni();
                rawData = JsonConvert.SerializeObject(dbResult);
                redisDataList = Encoding.UTF8.GetBytes(rawData);
                await distributedCache.SetAsync(cacheKey, redisDataList, cacheOpt(true));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Trace($"Effettuata lettura da DB + caching per InstallazioniNextGetAll: {ts.TotalMilliseconds} ms");
            }
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> InstallazioniNextUpdate(DB.DBModels.InstallazioneModel currItem)
        {
            bool done = false;
            try
            {
                done = dbControllerNext.UpsertInstallazione(currItem);
                await InvalidateAllCache();
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in InstallazioniNextUpdate:{Environment.NewLine}{exc}");
            }
            return await Task.FromResult(done);
        }

        /// <summary>
        /// invalida tutta la cache in caso di update
        /// </summary>
        /// <returns></returns>
        public async Task InvalidateAllCache()
        {
            await distributedCache.RemoveAsync(mHash("GLS:Applicazioni"));
            await distributedCache.RemoveAsync(mHash("Next:Applicazioni"));
            await distributedCache.RemoveAsync(mHash("GLS:Installazioni"));
            await distributedCache.RemoveAsync(mHash("Next:Installazioni"));
            await distributedCache.RemoveAsync(mHash("GLS:Licenze"));
            await distributedCache.RemoveAsync(mHash("Next:Licenze"));
            //await distributedCache.RemoveAsync(mHash("SUPPL:List"));
            //await distributedCache.RemoveAsync(mHash("TRANSP:List"));
            //await distributedCache.RemoveAsync(mHash("WEEKPLAN:List"));
        }

        /// <summary>
        /// Trasferisce una licenza da GLS a Next come LOG di una licenza scaduta
        /// </summary>
        /// <param name="currItem"></param>
        /// <returns></returns>
        public async Task<bool> LicenzaLogGlsNext(GLS.DatabaseModels.LicenzeAttive currItem, int IdxLicNext)
        {
            bool done = false;

            var currLicenza = dbControllerNext.GetLicenza(IdxLicNext);
            // step 1: converto licenza, faccio upsert
            var logLicNext = new DB.DBModels.LogLicenzaModel()
            {
                CodApp = currItem.ApplicativoNavigation.Applicativo,
                CodInst = currItem.InstallazioneNavigation.Installazione,
                Chiave = currItem.Licenza,
                NumLicenze = currItem.NumLicenze,
                Scadenza = currItem.Scadenza,
                Descrizione = currItem.ApplicativoNavigation.Descrizione,
                Tipo = TipoLicenza.GLS,
                IdxLic = IdxLicNext,
                Locked = true
            };
            bool step1 = dbControllerNext.UpsertLogLic(logLicNext);

            if (currLicenza != null && step1)
            {
                // step 2: disattivo vecchia licenza
                currItem.Locked = true;
                done = dbControllerGLS.UpdateLicenze(currItem);
            }
            return await Task.FromResult(done);
        }

        /// <summary>
        /// Trasferisce una licenza da GLS a Next
        /// </summary>
        /// <param name="currItem"></param>
        /// <returns></returns>
        public async Task<bool> LicenzaTransferGlsNext(GLS.DatabaseModels.LicenzeAttive currItem)
        {
            bool done = false;
            // step 1: controllo applicazione esistente
            DB.DBModels.ApplicativoModel appNext = new DB.DBModels.ApplicativoModel()
            {
                CodApp = currItem.ApplicativoNavigation.Applicativo,
                Descrizione = currItem.ApplicativoNavigation.Descrizione
            };
            bool step1 = dbControllerNext.UpsertApplicazione(appNext);

            // step 2: controllo installazione esistente
            var instNext = new DB.DBModels.InstallazioneModel()
            {
                Cliente = currItem.InstallazioneNavigation.Installazione,
                CodInst = currItem.InstallazioneNavigation.Installazione,
                Contatto = currItem.InstallazioneNavigation.Contatto,
                Email = currItem.InstallazioneNavigation.Email,
                Descrizione = currItem.ApplicativoNavigation.Descrizione
            };
            bool step2 = dbControllerNext.UpsertInstallazione(instNext);

            // step 3: converto licenza, faccio upsert
            var licNext = new DB.DBModels.LicenzaModel()
            {
                CodApp = currItem.ApplicativoNavigation.Applicativo,
                CodInst = currItem.InstallazioneNavigation.Installazione,
                Chiave = currItem.Licenza,
                NumLicenze = currItem.NumLicenze,
                Scadenza = currItem.Scadenza,
                Descrizione = currItem.ApplicativoNavigation.Descrizione,
                Tipo = TipoLicenza.GLS,
                Enigma = "",
                Payload = "",
                DataEnigma = DateTime.Now
            };
            bool step3 = dbControllerNext.UpsertLicenza(licNext);

            if (step1 && step2 && step3)
            {
                // step 4: disattivo vecchia licenza
                currItem.Locked = true;
                done = dbControllerGLS.UpdateLicenze(currItem);
            }
            return await Task.FromResult(done);
        }

        public async Task<List<GLS.DatabaseModels.LicenzeAttive>> LicenzeGLSGetAll()
        {
            List<GLS.DatabaseModels.LicenzeAttive> dbResult = new List<GLS.DatabaseModels.LicenzeAttive>();
            string cacheKey = mHash("GLS:Licenze");
            string rawData;
            var redisDataList = await distributedCache.GetAsync(cacheKey);
            if (redisDataList != null)
            {
                rawData = Encoding.UTF8.GetString(redisDataList);
                dbResult = JsonConvert.DeserializeObject<List<GLS.DatabaseModels.LicenzeAttive>>(rawData);
            }
            else
            {
                Stopwatch stopWatch = new Stopwatch();
                stopWatch.Start();
                dbResult = dbControllerGLS.GetLicenze();
                rawData = JsonConvert.SerializeObject(dbResult);
                redisDataList = Encoding.UTF8.GetBytes(rawData);
                await distributedCache.SetAsync(cacheKey, redisDataList, cacheOpt(true));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Trace($"Effettuata lettura da DB + caching per LicenzeGLSGetAll: {ts.TotalMilliseconds} ms");
            }
            return await Task.FromResult(dbResult);
        }

        /// <summary>
        /// Recupera licenze SENZA cache
        /// </summary>
        /// <param name="CurrFilter"></param>
        /// <returns></returns>
        public async Task<List<GLS.DatabaseModels.LicenzeAttive>> LicenzeGLSGetFilt(SelectGLS CurrFilter)
        {
            Stopwatch stopWatch = new Stopwatch();
            List<GLS.DatabaseModels.LicenzeAttive> dbResult = new List<GLS.DatabaseModels.LicenzeAttive>();
            stopWatch.Start();
            dbResult = dbControllerGLS.GetLicenzeFilt(CurrFilter.OnlyActive, CurrFilter.OnlyUnlock, CurrFilter.ApplicazioneSel, CurrFilter.InstallazioneSel);
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Trace($"Effettuata lettura da DB per LicenzeGLSGetFilt: {ts.TotalMilliseconds} ms");
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> LicenzeGLSUpdate(GLS.DatabaseModels.LicenzeAttive currItem)
        {
            bool done = false;
#if false
            try
            {
                done = dbControllerGLS.UpdateApplicazioni(currItem);
                await InvalidateAllCache();
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in ApplicazioniUpdate:{Environment.NewLine}{exc}");
            }
#endif
            return await Task.FromResult(done);
        }

        public async Task<List<DB.DBModels.LicenzaModel>> LicenzeNextGetAll()
        {
            List<DB.DBModels.LicenzaModel> dbResult = new List<DB.DBModels.LicenzaModel>();
            string cacheKey = mHash("Next:Licenze");
            string rawData;
            var redisDataList = await distributedCache.GetAsync(cacheKey);
            if (redisDataList != null)
            {
                rawData = Encoding.UTF8.GetString(redisDataList);
                dbResult = JsonConvert.DeserializeObject<List<DB.DBModels.LicenzaModel>>(rawData);
            }
            else
            {
                Stopwatch stopWatch = new Stopwatch();
                stopWatch.Start();
                dbResult = dbControllerNext.GetLicenze();
                rawData = JsonConvert.SerializeObject(dbResult);
                redisDataList = Encoding.UTF8.GetBytes(rawData);
                await distributedCache.SetAsync(cacheKey, redisDataList, cacheOpt(true));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Trace($"Effettuata lettura da DB + caching per LicenzeNextGetAll: {ts.TotalMilliseconds} ms");
            }
            return await Task.FromResult(dbResult);
        }

        /// <summary>
        /// Recupera licenze SENZA cache
        /// </summary>
        /// <param name="CurrFilter"></param>
        /// <returns></returns>
        public async Task<List<DB.DBModels.LicenzaModel>> LicenzeNextGetFilt(SelectNext CurrFilter)
        {
            Stopwatch stopWatch = new Stopwatch();
            List<DB.DBModels.LicenzaModel> dbResult = new List<DB.DBModels.LicenzaModel>();
            stopWatch.Start();
            dbResult = dbControllerNext.GetLicenzeFilt(CurrFilter.OnlyActive, CurrFilter.ApplicazioneSel, CurrFilter.InstallazioneSel);
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Trace($"Effettuata lettura da DB per LicenzeNextGetFilt: {ts.TotalMilliseconds} ms");
            return await Task.FromResult(dbResult);
        }

        public async Task<bool> LicenzeNextUpdate(DB.DBModels.LicenzaModel currItem)
        {
            bool done = false;

            // chiamo Log licenza + update insieme
            try
            {
                done = dbControllerNext.UpsertLicenza(currItem);
                await InvalidateAllCache();
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in ApplicazioniUpdate:{Environment.NewLine}{exc}");
            }
            return await Task.FromResult(done);
        }

        public void rollBackEditGLS(object item)
        {
            dbControllerGLS.rollBackEntity(item);
        }

        public async Task<bool> SendEmail(string destEmail, string oggetto, string corpo)
        {
            bool answ = false;
            try
            {
                await _emailSender.SendEmailAsync(destEmail, oggetto, corpo);
                answ = true;
            }
            catch
            { }

            return answ;
        }

        /// <summary>
        /// Aggiornamentos tato ticket
        /// </summary>
        /// <param name="IdxTicket"></param>
        /// <param name="NewStatus"></param>
        /// <returns></returns>
        public async Task<bool> TicketUpdateState(int IdxTicket, StatoRichiesta NewStatus)
        {
            bool fatto = false;
            // inserimento!
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            fatto = dbControllerNext.TicketUpdateState(IdxTicket, NewStatus);
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Trace($"Effettuata update con TicketUpdateState: {ts.TotalMilliseconds} ms");

            // restituisce elenco
            return await Task.FromResult(fatto);
        }

        #endregion Public Methods
    }
}