using Microsoft.Extensions.Configuration;
using MP.Data.Conf;
using MP.Data.DatabaseModels;
using Newtonsoft.Json;
using NLog;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MP.Data.Services
{
    /// <summary>
    /// Classe accesso dati filtrati per operatore
    /// </summary>
    public class ListSelectDataSrv : BaseServ, IDisposable
    {
        #region Public Constructors

        public ListSelectDataSrv(IConfiguration configuration)
        {
            _configuration = configuration;

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

            // conf DB
            string connStr = _configuration.GetConnectionString("Mp.All");
            if (string.IsNullOrEmpty(connStr))
            {
                Log.Error("ConnString empty!");
            }
            else
            {
                StringBuilder sb = new StringBuilder();
                dbController = new Controllers.MpSpecController(configuration);
                sb.AppendLine($"ListSelectDataSrv | MpSpecController OK");
                Log.Info(sb.ToString());
            }
        }

        #endregion Public Constructors

        #region Public Properties

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

        #endregion Public Properties

        #region Public Methods

        /// <summary>
        /// Elenco tabella Articoli da filtro
        /// </summary>
        /// <param name="numRecord">Numero record max da recuperare</param>
        /// <param name="azienda">cod azienda, * = tutte</param>
        /// <param name="searchVal">Ricerca testuale</param>
        /// <returns></returns>
        public async Task<List<AnagArticoli>> ArticoliGetSearch(int numRecord, string azienda, string searchVal)
        {
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<AnagArticoli>? result = new List<AnagArticoli>();
            // cerco in redis...
            string currKey = $"{redisBaseKey}:Art:{azienda}:{searchVal}:{numRecord}";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<AnagArticoli>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.ArticoliGetSearch(numRecord, azienda, searchVal));
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, LongCache);
            }
            if (result == null)
            {
                result = new List<AnagArticoli>();
            }
            sw.Stop();
            Log.Debug($"ArticoliGetSearch | azienda: {azienda} | searchVal: {searchVal} | numRecord: {numRecord} | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        public Task<List<ConfigModel>> ConfigGetAll()
        {
            return Task.FromResult(dbController.ConfigGetAll().ToList());
        }

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

        /// <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;
        }

        /// <summary>
        /// Elenco link JQM dato filtro tipo
        /// </summary>
        /// <param name="tipoLink"></param>
        /// <returns></returns>
        public async Task<List<LinkMenu>> ListLinkFilt(string tipoLink)
        {
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<LinkMenu>? result = new List<LinkMenu>();
            // cerco in redis...
            string currKey = $"{redisBaseKey}:Menu:{tipoLink}";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            //if (!string.IsNullOrEmpty($"{rawData}"))
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<LinkMenu>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.ListLinkFilt(tipoLink));
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, UltraLongCache);
            }
            if (result == null)
            {
                result = new List<LinkMenu>();
            }
            sw.Stop();
            Log.Debug($"ListLinkFilt | tipoLink: {tipoLink} | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }
        /// <summary>
        /// Elenco link JQM (totale)
        /// </summary>
        /// <returns></returns>
        public async Task<List<LinkMenu>> ListLinkAll()
        {
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<LinkMenu>? result = new List<LinkMenu>();
            // cerco in redis...
            string currKey = $"{redisBaseKey}:Menu:ALL";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            //if (!string.IsNullOrEmpty($"{rawData}"))
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<LinkMenu>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.ListLinkAll());
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, UltraLongCache);
            }
            if (result == null)
            {
                result = new List<LinkMenu>();
            }
            sw.Stop();
            Log.Debug($"ListLinkAll | tipoLink: * | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        /// <summary>
        /// Elenco Macchine dato operatore secondo gruppi (macchine/operatore)
        /// </summary>
        /// <param name="MatrOpr"></param>
        /// <returns></returns>
        public async Task<List<Macchine>> MacchineByMatrOper(int MatrOpr)
        {
            string source = "DB";
            Stopwatch sw = new Stopwatch();
            sw.Start();
            List<Macchine>? result = new List<Macchine>();
            // cerco in redis...
            string currKey = $"{redisBaseKey}:Macc:{MatrOpr}";
            RedisValue rawData = await redisDb.StringGetAsync(currKey);
            //if (!string.IsNullOrEmpty($"{rawData}"))
            if (rawData.HasValue)
            {
                result = JsonConvert.DeserializeObject<List<Macchine>>($"{rawData}");
                source = "REDIS";
            }
            else
            {
                result = await Task.FromResult(dbController.MacchineByMatrOper(MatrOpr));
                // serializzp e salvo...
                rawData = JsonConvert.SerializeObject(result);
                await redisDb.StringSetAsync(currKey, rawData, UltraLongCache);
            }
            if (result == null)
            {
                result = new List<Macchine>();
            }
            sw.Stop();
            Log.Debug($"MacchineGetFilt | MatrOpr: {MatrOpr} | {source} | {sw.Elapsed.TotalMilliseconds}ms");
            return result;
        }

        #endregion Public Methods

        #region Protected Fields

        /// <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 Private Fields

        private static Logger Log = LogManager.GetCurrentClassLogger();

        private string redisBaseKey = "MP:ALL:Cache";

        #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;
                }
            }

            return answ;
        }

        #endregion Private Methods
    }
}