using Microsoft.Extensions.Caching.Distributed;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using MP.Data.Controllers;
using MP.Data.DatabaseModels;
using MP.Data.Services;
using Newtonsoft.Json;
using NLog;
using NLog.Fluent;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static MP.Data.Objects.Enums;

namespace MP.Stats.Data
{
    public class MpStatsService : BaseServ, IDisposable
    {
        #region Public Fields

        public static MP.Data.Controllers.MpStatsController dbController;

        #endregion Public Fields

        #region Public Constructors

        public MpStatsService(IConfiguration configuration, ILogger<MpStatsService> logger)
        {
            _logger = logger;
            _configuration = configuration;

            // setup compoenti REDIS
            redisConn = ConnectionMultiplexer.Connect(_configuration.GetConnectionString("Redis"));
            redisDb = redisConn.GetDatabase();

            // conf DB
            string connStr = _configuration.GetConnectionString("MP.Stats");
            if (string.IsNullOrEmpty(connStr))
            {
                _logger.LogError("ConnString empty!");
            }
            else
            {
                dbController = new MP.Data.Controllers.MpStatsController(configuration);
                StringBuilder sb = new StringBuilder();
                sb.AppendLine($"DbController OK");
                _logger.LogInformation(sb.ToString());
            }
        }

        #endregion Public Constructors

        #region Public Events

        /// <summary>
        /// Evento richiesta rilettura dati pagina (x refresh pagine aperte)
        /// </summary>
        public event EventHandler ReloadRequest = delegate { };

        #endregion Public Events

        #region Public Methods

        public async Task<List<AzioniUL>> ActionsGetAll()
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<AzioniUL> result = new List<AzioniUL>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = $"{redisBaseKey}:Cache:AZIONI_ALL";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<AzioniUL>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.ActionsGetAll();
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<AzioniUL>();
            }
            sw.Stop();
            _logger.LogDebug($"ActionsGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public Task<List<AutocompleteModel>> ArticoliGetSearch(int numRecord, string searchVal = "")
        {
            List<AutocompleteModel> answ = new List<AutocompleteModel>();
            answ.Add(new AutocompleteModel { LabelField = "--- TUTTE ---", ValueField = "*" });
            if (numRecord > -1)
            {
                answ.AddRange(dbController.ArticoliGetSearch(numRecord, searchVal).Select(x => new AutocompleteModel { LabelField = $"{x.CodArticolo} {x.DescArticolo} {x.Disegno}", ValueField = x.CodArticolo }).ToList());
            }
            return Task.FromResult(answ);
        }

        public async Task<List<AutocompleteModel>> ArticoliList(string searchVal)
        {
            List<AutocompleteModel> answ = new List<AutocompleteModel>();
            answ.Add(new AutocompleteModel { LabelField = "--- TUTTE ---", ValueField = "*" });
            var listMacchine = dbController.MacchineGetAll();
            answ.AddRange(listMacchine.Select(x => new AutocompleteModel { LabelField = x.IdxMacchina, ValueField = x.IdxMacchina }).ToList());
            return await Task.FromResult(answ);
        }

        public Task<List<AutocompleteModel>> AzioniList()
        {
            List<AutocompleteModel> answ = new List<AutocompleteModel>();
            answ.Add(new AutocompleteModel { LabelField = "--- TUTTE ---", ValueField = "*" });
            answ.AddRange(dbController.ActionsGetAll().Select(x => new AutocompleteModel { LabelField = $"{x.Descrizione}", ValueField = x.Azione }).ToList());
            return Task.FromResult(answ);
        }

#if false
        /// <summary>
        /// Aggiorna record calcolando prossima scadenza dato ultima esecuzione
        /// </summary>
        /// <param name="taskRec"></param>
        /// <returns></returns>
        public DateTime CalcNextExe(TaskListModel? taskRec)
        {
            DateTime dtNext = DateTime.Today;
            if (taskRec != null)
            {
                dtNext = dbController.CalcNextExe(taskRec);
            }
            return dtNext;
        } 
#endif

        public Task<List<AutocompleteModel>> CommesseGetSearch(int numRecord, string searchVal = "")
        {
            List<AutocompleteModel> answ = new List<AutocompleteModel>();
            answ.Add(new AutocompleteModel { LabelField = "--- TUTTE ---", ValueField = "*" });
            if (numRecord > -1)
            {
                answ.AddRange(dbController.CommesseGetSearch(numRecord, searchVal).GroupBy(x => x.KeyRichiesta).Select(x => new AutocompleteModel { LabelField = $"{x.First().CodArticolo} | {x.First().KeyRichiesta}", ValueField = x.First().KeyRichiesta }).ToList());
            }
            return Task.FromResult(answ);
        }

        public void Dispose()
        {
            // Clear database controller
            dbController.Dispose();
            // redis dispose
            redisConn = null;
            redisDb = null;
        }

#if false
        /// <summary>
        /// Chiamata esecuzione di un singolo task programmato
        /// </summary>
        /// <param name="TaskId"></param>
        /// <param name="SchedNext">Se true rischedula successiva chiamata</param>
        /// <returns></returns>
        public async Task<TaskResultModel> ExecuteTask(int TaskId, bool SchedNext)
        {
            TaskResultModel dbResult = dbController.ExecuteTask(TaskId, SchedNext);
            // svuoto cache!
            await FlushCache("Task");
            return await Task.FromResult(dbResult);
        } 
#endif

        /// <summary>
        /// Pulizia cache Redis (tutta)
        /// </summary>
        /// <returns></returns>
        public async Task<bool> FlushCache()
        {
            RedisValue pattern = new RedisValue($"{redisBaseKey}:*");
            bool answ = await ExecFlushRedisPattern(pattern);
            return answ;
        }

        /// <summary>
        /// Pulizia cache Redis per chiave specifica (da redisBaseKey...)
        /// </summary>
        /// <returns></returns>
        public async Task<bool> FlushCache(string KeyReq)
        {
            RedisValue pattern = new RedisValue($"{redisBaseKey}:{KeyReq}:*");
            bool answ = await ExecFlushRedisPattern(pattern);
            return answ;
        }

        public async Task<List<Macchine>> MacchineGetAll()
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<Macchine> result = new List<Macchine>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = $"{redisBaseKey}:Cache:Macchine";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<Macchine>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.MacchineGetAll().ToList();
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<Macchine>();
            }
            sw.Stop();
            _logger.LogDebug($"MacchineGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public Task<List<AutocompleteModel>> MachineList()
        {
            List<AutocompleteModel> answ = new List<AutocompleteModel>();
            answ.Add(new AutocompleteModel { LabelField = "--- TUTTE ---", ValueField = "*" });
            answ.AddRange(dbController
                            .MacchineGetAll()
                            .Select(x => new AutocompleteModel
                            {
                                LabelField = $"{x.IdxMacchina} | {x.Nome} {x.Descrizione} ",
                                ValueField = x.IdxMacchina
                            })
                            .ToList());
            return Task.FromResult(answ);
        }

        /// <summary>
        /// Invio notifica rilettura (con parametro)
        /// </summary>
        /// <param name="message"></param>
        public void NotifyReloadRequest(string message)
        {
            if (ReloadRequest != null)
            {
                // messaggio
                ReloadEventArgs rea = new ReloadEventArgs(message);
                ReloadRequest.Invoke(this, rea);
            }
        }

        public void rollBackEdit(object item)
        {
            dbController.RollBackEntity(item);
        }

        public async Task<List<ResControlli>> StatControlliGetAll(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<ResControlli> result = new List<ResControlli>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:CONTROLLI", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<ResControlli>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatControlliGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<ResControlli>();
            }
            // se necessario filtro..
            if (!string.IsNullOrEmpty(searchVal))
            {
                result = result
                        .Where(x => x.Note.Contains(searchVal, StringComparison.InvariantCultureIgnoreCase))
                        .ToList();
            }
            sw.Stop();
            _logger.LogDebug($"StatControlliGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public async Task<List<DdbTurni>> StatDdbGetAll(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<DdbTurni> result = new List<DdbTurni>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKeyPaged($"{redisBaseKey}:DDBT", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<DdbTurni>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatDdbGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo, CurrFilter.FirstRecord, CurrFilter.NumRecord);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<DdbTurni>();
            }
            sw.Stop();
            _logger.LogDebug($"StatDdbGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Recupera TUTTI x export
        /// </summary>
        /// <param name="CurrFilter"></param>
        /// <param name="searchVal"></param>
        /// <returns></returns>
        public async Task<List<DdbTurni>> StatDdbGetAllExport(SelectData CurrFilter, string searchVal = "")
        {
            //return Task.FromResult(dbController.StatDdbGetAll(numRecord, searchVal).ToArray());
            List<DdbTurni> dbResult = new List<DdbTurni>();
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            dbResult = dbController.StatDdbGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo, 1, 0);
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            _logger.LogTrace($"Effettuata lettura COMPLETA da DB + caching per StatDdbGetAllExport: {ts.TotalMilliseconds} ms");
            return await Task.FromResult(dbResult);
        }

        public async Task<int> StatDdbGetCount(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            int numRec = 0;
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:DDBT-COUNT", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                numRec = JsonConvert.DeserializeObject<int>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                numRec = dbController.StatDdbGetCount(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(numRec);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            sw.Stop();
            _logger.LogDebug($"StatDdbGetCount | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return numRec;
        }

        /// <summary>
        /// Statistiche ODL
        /// </summary>
        /// <param name="CurrFilter"></param>
        /// <param name="searchVal"></param>
        /// <returns></returns>
        public async Task<List<OdlEnergyModel>> StatOdlEnergyGetAll(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<OdlEnergyModel> result = new List<OdlEnergyModel>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:ODL_ENERGY", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<OdlEnergyModel>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatOdlEnergyGetFilt(CurrFilter.IdxMacchina, CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<OdlEnergyModel>();
            }
            sw.Stop();
            _logger.LogDebug($"StatOdlEnergyGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Statistiche Energia x ODL
        /// </summary>
        /// <param name="CurrFilter"></param>
        /// <param name="searchVal"></param>
        /// <returns></returns>
        public async Task<List<StatsODL>> StatOdlGetAll(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<StatsODL> result = new List<StatsODL>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:ODL", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<StatsODL>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatOdlGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<StatsODL>();
            }
            sw.Stop();
            _logger.LogDebug($"StatOdlEnergyGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public async Task<List<ResScarti>> StatScartiGetAll(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<ResScarti> result = new List<ResScarti>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:SCARTI:RAW", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<ResScarti>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatScartiGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<ResScarti>();
            }
            sw.Stop();
            _logger.LogDebug($"StatScartiGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public async Task<List<TurniOee>> StatTurniOeeGetAllAsync(DateTime DataStart, DateTime DataEnd, string IdxMacchina, int IdxODL, string KeyRichiesta, string CodArticolo, string searchVal = "")
        {
            return await Task.FromResult(dbController.StatTurniOeeGetAll(DataStart, DataEnd, IdxMacchina, IdxODL, KeyRichiesta, CodArticolo));
        }

        public async Task<List<TurniOee>> StatTurniOeeGetAllCached(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<TurniOee> result = new List<TurniOee>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:OEE", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<TurniOee>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatTurniOeeGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<TurniOee>();
            }
            sw.Stop();
            _logger.LogDebug($"StatTurniOeeGetAllCached | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public async Task<List<UserActionLog>> StatUserLogGetAll(SelectData CurrFilter, string searchVal = "")
        {
            // setup parametri costanti
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<UserActionLog> result = new List<UserActionLog>();
            // cerco in redis...
            DateTime adesso = DateTime.Now;
            string currKey = getCacheKey($"{redisBaseKey}:USRACTLOG", CurrFilter);
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<UserActionLog>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = dbController.StatUserLogGetAll(CurrFilter.DateStart, CurrFilter.DateEnd, CurrFilter.IdxMacchina, CurrFilter.IdxOdl, CurrFilter.KeyRichiesta, CurrFilter.CodArticolo);
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, FastCache);
            }
            if (result == null)
            {
                result = new List<UserActionLog>();
            }
            sw.Stop();
            _logger.LogDebug($"StatUserLogGetAll | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }


        #endregion Public Methods

        #region Protected Fields

        protected static string connStringBBM = "";

        protected static string connStringFatt = "";

        /// <summary>
        /// Oggetto per connessione a REDIS
        /// </summary>
        protected ConnectionMultiplexer redisConn = null!;

        /// <summary>
        /// Oggetto DB redis da impiegare x chiamate R/W
        /// </summary>
        protected IDatabase redisDb = null!;

        #endregion Protected Fields

        #region Protected Methods

        protected string getCacheKey(string TableName, SelectData CurrFilter)
        {
            string answ = $"{TableName}:M_{CurrFilter.IdxMacchina}:AZ_{CurrFilter.Azione}:ART_{CurrFilter.CodArticolo}:KR_{CurrFilter.KeyRichiesta}:O_{CurrFilter.IdxOdl}:D_{CurrFilter.DateStart:yyyyMMddHHmm}_{CurrFilter.DateEnd:yyyyMMddHHmm}";
            return answ;
        }

        protected string getCacheKeyPaged(string TableName, SelectData CurrFilter)
        {
            string answ = $"{TableName}:M_{CurrFilter.IdxMacchina}:A_{CurrFilter.CodArticolo}:K_{CurrFilter.KeyRichiesta}:O_{CurrFilter.IdxOdl}:D_{CurrFilter.DateStart:yyMMddHHmm}_{CurrFilter.DateEnd:yyMMddHHmm}:R_{CurrFilter.FirstRecord}_{CurrFilter.FirstRecord + CurrFilter.NumRecord}";
            return answ;
        }

        #endregion Protected Methods

        #region Private Fields

        private static IConfiguration _configuration;

        private static ILogger<MpStatsService> _logger;

        private string redisBaseKey = "MP:STATS";

        #endregion Private Fields

        #region Private Methods

        /// <summary>
        /// Esegue flush memoria redis dato pattern
        /// </summary>
        /// <param name="pattern"></param>
        /// <returns></returns>
        private async Task<bool> ExecFlushRedisPattern(RedisValue pattern)
        {
            bool answ = false;
            var listEndpoints = redisConn.GetEndPoints();
            foreach (var endPoint in listEndpoints)
            {
                //var server = redisConnAdmin.GetServer(listEndpoints[0]);
                var server = redisConn.GetServer(endPoint);
                if (server != null)
                {
                    var keyList = server.Keys(redisDb.Database, pattern);
                    foreach (var item in keyList)
                    {
                        await redisDb.KeyDeleteAsync(item);
                    }
                    answ = true;
                }
            }
            // notifico update ai client in ascolto x reset cache
            NotifyReloadRequest($"FlushRedisCache | {pattern}");
            return answ;
        }

        #endregion Private Methods
    }
}