using MP.Data;
using MP.Data.Conf;
using MP.Data.DatabaseModels;
using MP.Data.DTO;
using Newtonsoft.Json;
using NLog;
using StackExchange.Redis;
using System.Diagnostics;

namespace MP.SPEC.Data
{
    public class MpDataService : IDisposable
    {
        #region Public Constructors

        public MpDataService(IConfiguration configuration, ILogger<MpDataService> logger)
        {
            _logger = logger;
            _logger.LogInformation("Starting MpDataService INIT");
            _configuration = configuration;

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

            // leggo cache lungo periodo
            int.TryParse(_configuration.GetValue<string>("ServerConf:redisLongTimeCache"), out redisLongTimeCache);

            _logger.LogInformation("Redis INIT");

            // setup canali pub/sub
            dataPipe = new MessagePipe(redisConn, Constants.ACT_MSE_DATA_KEY);
            blinkPipe = new MessagePipe(redisConn, Constants.ACT_BLINK_KEY);

            // conf DB
            string connStr = _configuration.GetConnectionString("Mp.Data");
            if (string.IsNullOrEmpty(connStr))
            {
                _logger.LogError("DbController: ConnString empty!");
            }
            else
            {
                dbController = new MP.Data.Controllers.MpSpecController(configuration);
                _logger.LogInformation("DbController OK");
            }
        }

        #endregion Public Constructors

        #region Public Properties

        public static MP.Data.Controllers.MpSpecController dbController { get; set; } = null!;

        public MessagePipe blinkPipe { get; set; } = null!;

        /// <summary>
        /// Dizionario dei tag configurati per IOB
        /// </summary>
        public Dictionary<string, List<TagData>> currTagConf { get; set; } = new Dictionary<string, List<TagData>>();

        public MessagePipe dataPipe { get; set; } = null!;

        #endregion Public Properties

        #region Public Methods

        public async Task<List<ListValues>> AnagStatiComm()
        {
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            List<ListValues>? result = new List<ListValues>();
            // cerco in redis...
            RedisValue rawData = await redisDb.StringGetAsync(redisStatoCom);
            if (!string.IsNullOrEmpty($"{rawData}"))
            {
                result = JsonConvert.DeserializeObject<List<ListValues>>($"{rawData}");
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Debug($"AnagStatiComm Read from REDIS: {ts.TotalMilliseconds}ms");
            }
            else
            {
                result = await Task.FromResult(dbController.AnagStatiComm());
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(redisStatoCom, rawData, getRandTOut(redisLongTimeCache));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Debug($"AnagStatiComm Read from DB: {ts.TotalMilliseconds}ms");
            }
            if (result == null)
            {
                result = new List<ListValues>();
            }
            return result;
        }

        public async Task<List<ListValues>> AnagTipoArtLV()
        {
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            List<ListValues>? result = new List<ListValues>();
            // cerco in redis...
            RedisValue rawData = await redisDb.StringGetAsync(redisTipoArt);
            if (!string.IsNullOrEmpty($"{rawData}"))
            {
                result = JsonConvert.DeserializeObject<List<ListValues>>($"{rawData}");
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Debug($"AnagTipoArtLV Read from REDIS: {ts.TotalMilliseconds}ms");
            }
            else
            {
                result = await Task.FromResult(dbController.AnagTipoArtLV());
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(redisTipoArt, rawData, getRandTOut(redisLongTimeCache));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Debug($"AnagTipoArtLV Read from DB: {ts.TotalMilliseconds}ms");
            }
            if (result == null)
            {
                result = new List<ListValues>();
            }
            return result;
        }

        /// <summary>
        /// Eliminazione record selezionato
        /// </summary>
        /// <param name="currRec"></param>
        /// <returns></returns>
        public async Task<bool> ArticoliDeleteRecord(AnagArticoli currRec)
        {
            return await dbController.ArticoliDeleteRecord(currRec);
        }

        /// <summary>
        /// Restitusice elenco articoli cercati
        /// </summary>
        /// <param name="numRecord"></param>
        /// <param name="searchVal"></param>
        /// <returns></returns>
        public async Task<List<AnagArticoli>> ArticoliGetSearch(int numRecord, string azienda, string searchVal)
        {
            return await Task.FromResult(dbController.ArticoliGetSearch(numRecord, azienda, searchVal));
        }

        /// <summary>
        /// Aggiornamento record selezionato
        /// </summary>
        /// <param name="currRec"></param>
        /// <returns></returns>
        public async Task<bool> ArticoliUpdateRecord(AnagArticoli currRec)
        {
            return await dbController.ArticoliUpdateRecord(currRec);
        }

        /// <summary>
        /// Verifica se sia possiubile cancellare articolo dato suo CodArt cercando su redis o su
        /// tab veto da DB
        /// </summary>
        /// <param name="CodArt"></param>
        /// <returns></returns>
        public bool ArticoloDelEnabled(object CodArt)
        {
            bool answ = false;
            string codArticolo = $"{CodArt}";
            int cacheCheckArtUsato = 1;
            int.TryParse(_configuration.GetValue<string>("ServerConf:cacheCheckArtUsato"), out cacheCheckArtUsato);
            TimeSpan TTLCache = getRandTOut(cacheCheckArtUsato);
            // cerco in cache redis...
            string redKeyArtUsed = $"{Utils.redKeyArtUsed}:{codArticolo}";
            string redKeyTabCheckArt = Utils.redKeyTabCheckArt;
            string rawData = redisDb.StringGet(redKeyArtUsed);
            if (!string.IsNullOrEmpty(rawData))
            {
                bool.TryParse(rawData, out answ);
            }
            else
            {
                // controllo non sia stato mai prodotto sennò non posso cancellare...
                try
                {
                    // cerco in cache se ci sia la tabella con gli articoli impiegati...
                    string rawTable = redisDb.StringGet(redKeyTabCheckArt);
                    List<string> artList = new List<string>();
                    if (!string.IsNullOrEmpty(rawTable))
                    {
                        artList = JsonConvert.DeserializeObject<List<string>>(rawTable);
                    }
                    // rileggo...
                    if (artList == null || artList.Count == 0)
                    {
                        artList = new List<string>();
                        var tabArticoli = dbController.ArticoliGetUsed();
                        var codList = tabArticoli.Select(x => x.CodArticolo);
                        foreach (string cod in codList)
                        {
                            artList.Add(cod);
                        }
                        // SE fosse vuoto aggiungo comunque il cado "ND"...
                        if (artList.Count == 0)
                        {
                            artList.Add("ND");
                        }
                        // salvo
                        rawTable = JsonConvert.SerializeObject(artList);
                        redisDb.StringSet(redKeyTabCheckArt, rawTable, TTLCache);
                    }
                    // cerco nella tabella: se ci fosse --> disabilitato delete
                    bool usato = false;
                    if (artList != null && artList.Count > 0)
                    {
                        usato = artList.Contains(codArticolo);
                    }
                    answ = !usato;
                    redisDb.StringSet(redKeyArtUsed, $"{answ}", TTLCache);
                }
                catch
                { }
            }
            return answ;
        }

        public async Task<List<ConfigModel>> ConfigGetAll()
        {
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            List<ConfigModel>? result = new List<ConfigModel>();
            // cerco in redis...
            RedisValue rawData = await redisDb.StringGetAsync(redisConfKey);
            if (!string.IsNullOrEmpty($"{rawData}"))
            {
                result = JsonConvert.DeserializeObject<List<ConfigModel>>($"{rawData}");
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Debug($"ConfigGetAll Read from REDIS: {ts.TotalMilliseconds}ms");
            }
            else
            {
                result = await Task.FromResult(dbController.ConfigGetAll());
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(redisConfKey, rawData, getRandTOut(redisLongTimeCache));
                stopWatch.Stop();
                TimeSpan ts = stopWatch.Elapsed;
                Log.Debug($"ConfigGetAll Read from DB: {ts.TotalMilliseconds}ms");
            }
            if (result == null)
            {
                result = new List<ConfigModel>();
            }
            return result;
        }

        /// <summary>
        /// Reset dati cache config
        /// </summary>
        /// <returns></returns>
        public async Task ConfigResetCache()
        {
            await redisDb.StringSetAsync(redisConfKey, "");
        }

        /// <summary>
        /// Update chiave config
        /// </summary>
        /// <returns></returns>
        public async Task<bool> ConfigUpdate(ConfigModel updRec)
        {
            return await Task.FromResult(dbController.ConfigUpdate(updRec));
        }

        public List<FluxLog> convertToFluxLog(string Valore)
        {
            //string valStriped = Valore.Substring(7, Valore.Length - 8);
            //var result = JsonConvert.DeserializeObject<List<FluxLog>>(valStriped);
            var result = JsonConvert.DeserializeObject<DossierFluxLogDTO>(Valore);
            return result.ODL;
        }

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

        /// <summary>
        /// Elenco ultimi n record DOssiers (che contengono ad esempio "salvataggi" di FLuxLog) dato
        /// macchina (ordinato x data registrazione)
        /// </summary>
        /// <param name="IdxMacchina">* = tutte, altrimenti solo x una data macchina</param>
        /// <param name="DtRef">Data di riferimento (Massima) per estrazione records</param>
        /// <param name="MaxRec">numero massimo record da restituire</param>
        /// <returns></returns>
        public async Task<List<Dossiers>> DossiersGetLastFilt(string IdxMacchina, DateTime DtRef, int MaxRec)
        {
            List<Dossiers>? result = new List<Dossiers>();
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            string readType = "DB";
            string currKey = $"{redisDossByMac}:{IdxMacchina}";
            // cerco in redis dato valore sel macchina...
            RedisValue rawData = redisDb.StringGet(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<Dossiers>>($"{rawData}");
                readType = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.DossiersGetLastFilt(IdxMacchina, DtRef, MaxRec));
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                redisDb.StringSet(currKey, rawData, getRandTOut(redisLongTimeCache / 5));
            }
            if (result == null)
            {
                result = new List<Dossiers>();
            }
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Debug($"DossiersGetLastFilt | Read from {readType}: {ts.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Effettua salvataggio snapshot parametri (con stored) + svuota eventuale cache redis
        /// </summary>
        /// <param name="IdxMacchina">macchina</param>
        /// <param name="maxSec">NUm massimo secondi per recuperare dati correnti</param>
        /// <returns></returns>
        public async Task<bool> DossiersTakeParamsSnapshot(string IdxMacchina, int MaxSec)
        {
            bool answ = false;
            await Task.Delay(1);
            // chiamo stored x salvare parametri
            dbController.DossiersTakeParamsSnapshot(IdxMacchina, MaxSec);
            // svuoto cache redis x macchina
            string currKey = $"{redisDossByMac}:{IdxMacchina}";
            redisDb.StringSet(currKey, "", TimeSpan.FromSeconds(1));
            currKey = $"{redisDossByMac}:*";
            redisDb.StringSet(currKey, "", TimeSpan.FromSeconds(1));
            return answ;
        }

        /// <summary>
        /// Restitusice elenco aziende
        /// </summary>
        /// <returns></returns>
        public Task<List<AnagGruppi>> ElencoAziende()
        {
            return Task.FromResult(dbController.AnagGruppiAziende());
        }

        /// <summary>
        /// Restitusice elenco fasi
        /// </summary>
        /// <returns></returns>
        public Task<List<AnagGruppi>> ElencoGruppiFase()
        {
            return Task.FromResult(dbController.AnagGruppiFase());
        }

        public Task<List<LinkMenu>> ElencoLink()
        {
            return Task.FromResult(dbController.ElencoLink());
        }

        public async Task<bool> FlushRedisCache()
        {
            await Task.Delay(1);
            bool answ = false;
            var listEndpoints = redisConnAdmin.GetEndPoints();
            var server = redisConnAdmin.GetServer(listEndpoints[0]);
            RedisValue pattern = new RedisValue($"{redisBaseAddr}*");
            if (server != null)
            {
                var keyList = server.Keys(redisDb.Database, pattern);
                foreach (var item in keyList)
                {
                    await redisDb.KeyDeleteAsync(item);
                }
                // brutalmente rimuovo intero contenuto DB... DANGER
                //await server.FlushDatabaseAsync();
                answ = true;
            }
            return answ;
        }

        /// <summary>
        /// Elenco ultimi n record flux log dato macchina e flusso (ordinato x data registrazione)
        /// </summary>
        /// <param name="IdxMacchina">* = tutte, altrimenti solo x una data macchina</param>
        /// <param name="CodFlux">*=tutti, altrimenti solo selezionato</param>
        /// <param name="MaxRec">numero massimo record da restituire</param>
        /// <returns></returns>
        public async Task<List<FluxLog>> FluxLogGetLastFilt(string IdxMacchina, string CodFlux, int MaxRec)
        {
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            var results = await Task.FromResult(dbController.FluxLogGetLastFilt(IdxMacchina, CodFlux, MaxRec));
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Debug($"FluxLogGetLastFilt | Read from DB: {ts.TotalMilliseconds}ms");
            return results;
        }

        /// <summary>
        /// Elenco setup dei tag conf correnti
        /// </summary>
        /// <returns></returns>
        public Task<Dictionary<string, List<TagData>>> getAllTags()
        {
            return Task.FromResult(currTagConf);
        }

        /// <summary>
        /// restituisce il valore da REDIS associato al tag richeisto
        /// </summary>
        /// <param name="redKey">Chiave in cui cercare il valore</param>
        /// <returns></returns>
        public string getTagConf(string redKey)
        {
            string outVal = "";
            // cerco in REDIS la conf x l'IOB
            var rawData = redisDb.StringGet(redKey);
            if (!string.IsNullOrEmpty(rawData))
            {
                outVal = $"{rawData}";
            }
            return outVal;
        }

        /// <summary>
        /// Elenco ODL filtrati x stato, articolo, KeyRich (che contiene stato)
        /// </summary>
        /// <param name="inCorso">Stato ODL: true=in corso/completato</param>
        /// <param name="codArt">Cod articolo</param>
        /// <param name="keyRichPart">KeyRich (parziale) da cercare (es cod stato x yacht)</param>
        /// <returns></returns>
        public async Task<List<ODLModel>> ListODLFilt(bool inCorso, string codArt, string keyRichPart)
        {
            return await Task.FromResult(dbController.ListODLFilt(inCorso, codArt, keyRichPart));
        }

        /// <summary>
        /// Elenco PODL non avviati filtrati x articolo, KeyRich (che contiene stato)
        /// </summary>
        /// <param name="codArt">Cod articolo</param>
        /// <param name="keyRichPart">KeyRich (parziale) da cercare (es cod stato x yacht)</param>
        /// <returns></returns>
        public async Task<List<PODLModel>> ListPODLFilt(string codArt, string keyRichPart)
        {
            return await Task.FromResult(dbController.ListPODLFilt(codArt, keyRichPart));
        }

        /// <summary>
        /// Elenco di tutte le macchine gestite
        /// </summary>
        /// <returns></returns>
        public async Task<List<Macchine>> MacchineGetAll()
        {
            List<Macchine>? result = new List<Macchine>();
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            string readType = "DB";
            string currKey = redisMacList;
            // cerco in redis dato valore sel macchina...
            RedisValue rawData = redisDb.StringGet(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<Macchine>>($"{rawData}");
                readType = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.MacchineGetAll());
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                redisDb.StringSet(currKey, rawData, getRandTOut(redisLongTimeCache));
            }
            if (result == null)
            {
                result = new List<Macchine>();
            }
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Debug($"MacchineGetAll | Read from {readType}: {ts.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Elenco ID macchine con dati FluxLog gestite
        /// </summary>
        /// <returns></returns>
        public async Task<List<string>> MacchineWithFlux()
        {
            List<string>? result = new List<string>();
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            string readType = "DB";
            string currKey = redisMacByFlux;
            // cerco in redis dato valore sel macchina...
            RedisValue rawData = redisDb.StringGet(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<string>>($"{rawData}");
                readType = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.MacchineWithFlux());
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                redisDb.StringSet(currKey, rawData, getRandTOut(redisLongTimeCache));
            }
            if (result == null)
            {
                result = new List<string>();
            }
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Debug($"MacchineWithFlux | Read from {readType}: {ts.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Elenco di tutti i parametri filtrati x macchina
        /// </summary>
        /// <param name="IdxMacchina">* = tutte, altrimenti solo x una data macchina</param>
        /// <returns></returns>
        public async Task<List<string>> ParametriGetFilt(string IdxMacchina)
        {
            List<string>? result = new List<string>();
            Stopwatch stopWatch = new Stopwatch();
            stopWatch.Start();
            string readType = "DB";
            string currKey = $"{redisFluxByMac}:{IdxMacchina}";
            // cerco in redis dato valore sel macchina...
            RedisValue rawData = redisDb.StringGet(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<string>>($"{rawData}");
                readType = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.ParametriGetFilt(IdxMacchina));
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                redisDb.StringSet(currKey, rawData, getRandTOut(redisLongTimeCache));
            }
            if (result == null)
            {
                result = new List<string>();
            }
            stopWatch.Stop();
            TimeSpan ts = stopWatch.Elapsed;
            Log.Debug($"ParametriGetFilt | Read from {readType}: {ts.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Eliminazione record selezionato
        /// </summary>
        /// <param name="currRec"></param>
        /// <returns></returns>
        public async Task<bool> PODLDeleteRecord(PODLModel currRec)
        {
            return await dbController.PODLDeleteRecord(currRec);
        }

        /// <summary>
        /// Aggiornamento record selezionato
        /// </summary>
        /// <param name="currRec"></param>
        /// <returns></returns>
        public async Task<bool> POdlUpdateRecord(PODLModel currRec)
        {
            return await dbController.PODLUpdateRecord(currRec);
        }

        #endregion Public Methods

        #region Protected Fields

        protected Random rand = new Random();

        #endregion Protected Fields

        #region Protected Methods

        /// <summary>
        /// Restituisce un timeout dai minuti richiesti + tempo random 1..60 sec
        /// </summary>
        /// <param name="stdMinutes"></param>
        /// <returns></returns>
        protected TimeSpan getRandTOut(int stdMinutes)
        {
            double rndValue = (double)stdMinutes + (double)rand.Next(1, 60) / 60;
            return TimeSpan.FromMinutes(rndValue);
        }

        #endregion Protected Methods

        #region Private Fields

        private const string redisBaseAddr = "MP:";
        private const string redisConfKey = redisBaseAddr + "SPEC:Cache:Config";
        private const string redisDossByMac = redisBaseAddr + "SPEC:Cache:DossByMac";
        private const string redisFluxByMac = redisBaseAddr + "SPEC:Cache:FluxByMac";
        private const string redisMacByFlux = redisBaseAddr + "SPEC:Cache:MacByFlux";
        private const string redisMacList = redisBaseAddr + "SPEC:Cache:MacList";
        private const string redisStatoCom = redisBaseAddr + "SPEC:Cache:StatoCom";
        private const string redisTipoArt = redisBaseAddr + "SPEC:Cache:TipoArt";
        private static IConfiguration _configuration = null!;
        private static ILogger<MpDataService> _logger = null!;
        private static Logger Log = LogManager.GetCurrentClassLogger();

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

        /// <summary>
        /// Oggetto per connessione a REDIS modalità admin (ex flux dati)
        /// </summary>
        private ConnectionMultiplexer redisConnAdmin = null!;

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

        private int redisLongTimeCache = 5;

        #endregion Private Fields
    }
}