using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;
using MP.Core.Objects;
using Newtonsoft.Json;
using NLog;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MP.Data.Services
{
    /// <summary>
    /// Classe di partenza x costruzione servizi di accesso dati + cache
    /// </summary>
    public class BaseServ
    {
        #region Public Constructors

        public BaseServ(IConfiguration configuration)
        {
            _configuration = configuration;

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

            // json serializer... FIX errore loop circolare https://www.ryadel.com/en/jsonserializationexception-self-referencing-loop-detected-error-fix-entity-framework-asp-net-core/
            JSSettings = new JsonSerializerSettings()
            {
                ReferenceLoopHandling = ReferenceLoopHandling.Ignore
            };

            // recupero conf speciali
            MpIoNS = _configuration.GetValue<string>("ServerConf:MpIoNS");
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Recupero info IOB x TAB (da info registrate IOB-WIN--&gt; MP-IO)
        /// </summary>
        /// <param name="IdxMacchina"></param>
        /// <returns></returns>
        public IOB_data IobInfo(string IdxMacchina)
        {
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            IOB_data? result = new IOB_data();
            // cerco in redis...
            string currKey = RedHashMpIO($"hM2IOB:{IdxMacchina}");
            RedisValue rawData = redisDb.StringGet(currKey);
            //if (!string.IsNullOrEmpty($"{rawData}"))
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<IOB_data>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                Log.Error($"Errore: non trovato valore <IOB_data> valido in REDIS | key: {currKey}");
                Log.Info($"REDIS | conf: {redisConn.Configuration}");
                Log.Info($"  --> Valore trovato:{Environment.NewLine}{rawData}");
            }
            if (result == null)
            {
                result = new IOB_data();
                Log.Debug($"Init valore default <IOB_data> | IdxMacchina: {IdxMacchina}");
            }
            sw.Stop();
            Log.Debug($"IobInfo per {IdxMacchina} | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Recupero info Machine-IOB x TAB (da info registrate IOB-WIN --&gt; MP-IO)
        /// </summary>
        /// <param name="IdxMacchina"></param>
        /// <returns></returns>
        public Dictionary<string, string> MachIobConf(string IdxMacchina)
        {
            string source = "NA";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            Dictionary<string, string> result = new Dictionary<string, string>();
            // cerco in redis...
            string currKey = RedHashMpIO($"IOB:{IdxMacchina}:MachIobConf");
            try
            {
                result = redisDb
                            .HashGetAll(currKey)
                            .ToDictionary(x => $"{x.Name}", x => $"{x.Value}");
                source = "REDIS";
            }
            catch (Exception exc)
            {
                Log.Error($"Errore in MachIobConf{Environment.NewLine}{exc}");
            }
            if (result == null)
            {
                result = new Dictionary<string, string>();
                Log.Debug($"Init valore default MachIobConf | IdxMacchina: {IdxMacchina}");
            }
            sw.Stop();
            Log.Debug($"MachIobConf per {IdxMacchina} | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Recupero Conf Yaml Machine-IOB
        /// </summary>
        /// <param name="IdxMacchina"></param>
        /// <returns></returns>
        public string MachIobYamlConf(string IdxMacchina)
        {
            string source = "NA";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            string result = "";
            // cerco in redis...
            string currKey = RedHashMpIO($"IOB:{IdxMacchina}:ConfYaml");
            try
            {
                result = redisDb.StringGet(currKey);
                source = "REDIS";
            }
            catch (Exception exc)
            {
                Log.Error($"Errore in MachIobYamlConf{Environment.NewLine}{exc}");
            }
            if (result == null)
            {
                result = "";
                Log.Debug($"Init valore default MachIobYamlConf | IdxMacchina: {IdxMacchina}");
            }
            sw.Stop();
            Log.Debug($"MachIobYamlConf per {IdxMacchina} | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        #endregion Public Methods

        #region Protected Fields

        protected static IConfiguration _configuration = null!;
        protected JsonSerializerSettings? JSSettings;
        protected string MpIoNS = "";

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

        //ISubscriber sub = redis.GetSubscriber();
        /// <summary>
        /// Oggetto DB redis da impiegare x chiamate R/W
        /// </summary>
        protected IDatabase redisDb = null!;

        #endregion Protected Fields

        #region Protected Properties

        /// <summary>
        /// Durata cache breve (1 min circa + perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan FastCache
        {
            get => TimeSpan.FromSeconds(cacheTtlShort * rnd.Next(900, 1100) / 1000);
        }

        /// <summary>
        /// Durata cache lunga (+ perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan LongCache
        {
            get => TimeSpan.FromSeconds(cacheTtlLong * rnd.Next(900, 1100) / 1000);
        }

        /// <summary>
        /// Durata cache MOLTO breve (10 sec circa + perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan UltraFastCache
        {
            get => TimeSpan.FromSeconds(cacheTtlShort / 6 * rnd.Next(900, 1100) / 1000);
        }

        /// <summary>
        /// Durata cache MOLTO lunga (+ perturbazione percentuale +/-10%)
        /// </summary>
        protected TimeSpan UltraLongCache
        {
            get => TimeSpan.FromSeconds(cacheTtlLong * 10 * rnd.Next(900, 1100) / 1000);
        }

        #endregion Protected Properties

        #region Protected Methods

        protected string RedHashMpIO(string keyName)
        {
            string result = keyName;
            try
            {
                result = $"{MpIoNS}:{keyName}".Replace("\\", "_");
            }
            catch (Exception exc)
            {
                Log.Error($"Errore in RedHashMpIO{Environment.NewLine}{exc}");
            }

            return result;
        }

        #endregion Protected Methods

        #region Private Fields

        private static Logger Log = LogManager.GetCurrentClassLogger();

        /// <summary>
        /// Durata cache lunga IN SECONDI
        /// </summary>
        private int cacheTtlLong = 60 * 5;

        /// <summary>
        /// Durata cache breve IN SECONDI
        /// </summary>
        private int cacheTtlShort = 60 * 1;

        private Random rnd = new Random();

        #endregion Private Fields
    }
}