using EgwCoreLib.Utils;
using Microsoft.Extensions.Configuration;
using MP.Data.DbModels;
using MP.Data.DTO;
using Newtonsoft.Json;
using NLog;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace MP.Data.Services
{
    public class MessageService : IDisposable
    {
        #region Public Fields

        public const string KeyCommDtRif = "DtRifComm";

        public const string KeyCommText = "ValComm";

        public int orarioDip = 0;

        #endregion Public Fields

        #region Public Constructors

        public MessageService(IConfiguration configuration, IConnectionMultiplexer redConn, ILocalStorageService genLocalStorage, ISessionStorageService sessStore, TabDataService tdService, SharedMemService smServ)
        {
            _configuration = configuration;

            // gestione sessioni in browser
            localStorage = genLocalStorage;
            sessionStore = sessStore;
            TDService = tdService;
            SMService = smServ;

            // setup componenti REDIS
            this.redisConn = redConn;
            redisDb = redisConn.GetDatabase();
        }

        #endregion Public Constructors

        #region Public Events

        public event Action EA_OperUpdated = null!;

        public event Action EA_PageUpdated = null!;

        public event Action EA_ResetFooterTimer = null!;

        #endregion Public Events

        #region Public Properties

        public string CognomeNome
        {
            get
            {
                string answ = "";
                //int answ = -1;
                if (_rigaOper != null)
                {
                    answ = $"{_rigaOper.Cognome} {_rigaOper.Nome}";
                }
                return answ;
            }
        }

        /// <summary>
        /// Dizionario macchine
        /// </summary>
        public Dictionary<string, string> DictMacchine
        {
            get
            {
                Dictionary<string, string> answ = new Dictionary<string, string>();
                var pUpd = Task.Run(async () =>
                {
                    answ = await localStorage.GetItemAsync<Dictionary<string, string>>(KeyMacDict);
                });
                pUpd.Wait();
                return answ;
            }
            set
            {
                var pUpd = Task.Run(async () =>
                {
                    await localStorage.SetItemAsync(KeyMacDict, value);
                });
                pUpd.Wait();
            }
        }

        public DateTime dtLastAction { get; set; } = DateTime.Now;
        public DateTime dtLastSave { get; set; } = DateTime.Now;

        /// <summary>
        /// Semaforo x indicare fasi di reload attive e così non effettuare alcune operazioni...
        /// </summary>
        public bool IsReloading { get; set; } = false;

        public string LastIdxMacchina
        {
            get
            {
                string answ = "";
                answ = redisDb.StringGet((RedisKey)$"{redisBaseKey}:{MatrOpr}:lastIdxMacc");
                return answ;
            }
            set
            {
                // salvo solo se MatrOpr è valida
                if (MatrOpr > 0)
                {
                    redisDb.StringSet((RedisKey)$"{redisBaseKey}:{MatrOpr}:lastIdxMacc", value, TimeSpan.FromSeconds(30));
                }
            }
        }

        /// <summary>
        /// Cache elenco macchine abilitate all'utente, vuoto se scaduto reload
        /// </summary>
        public List<MacchineModel>? ListMachineEnabled
        {
            get
            {
                List<MacchineModel>? answ = userListMachine;
                if (DateTime.Now.Subtract(lastUserUpd).TotalSeconds > 30)
                {
                    answ = new List<MacchineModel>();
                    Log.Debug("ListMachineEnabled unvalidated");
                }
                return answ;
            }
            set
            {
                lastUserUpd = DateTime.Now;
                userListMachine = value;
            }
        }

        public int MatrOpr
        {
            get
            {
                int answ = -1;
                if (_rigaOper != null)
                {
                    answ = _rigaOper.MatrOpr;
                }
                return answ;
            }
        }

        public AnagOperatoriModel? RigaOper
        {
            get => _rigaOper;
            set
            {
                // salvo
                _rigaOper = value;
                if (EA_OperUpdated != null)
                {
                    EA_OperUpdated?.Invoke();
                }
            }
        }

        public string UserAuthKey
        {
            get
            {
                string answ = "";
                if (_rigaOper != null)
                {
                    answ = _rigaOper.authKey;
                }
                return answ;
            }
        }

        public string PageName;
        public string PageIcon;

        /// <summary>
        /// Diritti utente (solo Funzione/Ruolo)
        /// </summary>
        public List<string> UserRight { get; set; } = new List<string>();

        /// <summary>
        /// Dizionario totale preferenze utente
        /// </summary>
        public Dictionary<string, string> UsersPrefDict
        {
            get => MatrOpr > 0 ? redisHashDictGet((RedisKey)$"{redisBaseKey}:{MatrOpr}") : new Dictionary<string, string>();
            set => redisHashDictSet((RedisKey)$"{redisBaseKey}:{MatrOpr}", value);
        }

        public bool VetoRecordLogin
        {
            get
            {
                bool answ = false;
                string rawData = redisDb.StringGet((RedisKey)$"{redisBaseKey}:VetoLoginRec:{MatrOpr}");
                if (!string.IsNullOrEmpty(rawData))
                {
                    answ = true;
                }
                return answ;
            }
            set
            {
                redisDb.StringSet((RedisKey)$"{redisBaseKey}:VetoLoginRec:{MatrOpr}", value, TimeSpan.FromSeconds(60));
            }
        }

        #endregion Public Properties

        #region Public Methods

        public async Task ClearLocalStor()
        {
            await localStorage.ClearAsync();
        }

        public async Task ClearSessionStor()
        {
            await sessionStore.ClearAsync();
        }

        /// <summary>
        /// DateTime riferimento evento x commento fermata
        /// </summary>
        /// <param name="remAfter"></param>
        /// <returns></returns>
        public async Task<DateTime> CommentoDtRifGet(bool remAfter)
        {
            DateTime answ = DateTime.Now;
            bool hasKey = await sessionStore.ContainKeyAsync(KeyCommDtRif);
            if (hasKey)
            {
                answ = await sessionStore.GetItemAsync<DateTime>(KeyCommDtRif);
                // svuoto data registrata se richiesto
                if (remAfter)
                {
                    await sessionStore.RemoveItemAsync(KeyCommDtRif);
                }
            }
            return answ;
        }

        /// <summary>
        /// Macchine attualmente selezionata
        /// </summary>
        public async Task CommentoDtRifSet(DateTime DtRif)
        {
            await sessionStore.SetItemAsync(KeyCommDtRif, DtRif);
        }

        /// <summary>
        /// Commento fermata x recupero in editing
        /// </summary>
        /// <param name="remAfter"></param>
        /// <returns></returns>
        public async Task<string> CommentoValGet(bool remAfter)
        {
            string answ = "";
            bool hasKey = await sessionStore.ContainKeyAsync(KeyCommText);
            if (hasKey)
            {
                // recupero
                answ = await sessionStore.GetItemAsync<string>(KeyCommText);
                // svuoto data registrata se richiesto
                if (remAfter)
                {
                    await sessionStore.RemoveItemAsync(KeyCommText);
                }
            }
            return answ;
        }

        /// <summary>
        /// Macchine attualmente selezionata
        /// </summary>
        public async Task CommentoValSet(string Valore)
        {
            await sessionStore.SetItemAsync(KeyCommText, Valore);
        }

        public string DecryptData(string encData)
        {
            return SteamCrypto.DecryptString(encData, Constants.passPhrase);
        }

        public void Dispose()
        {
            redisDb = null;
            _rigaOper = null;
            if (userListMachine != null)
            {
                userListMachine.Clear();
            }
            UserPrefs.Clear();
        }

        public async Task<bool> DoLogIn(string decodValue, bool saveOpr)
        {
            bool answ = false;
            var devGuid = await GetCurrDevGuidLSAsync();
            // decifro i valori..
            var decrVal = DecryptData(decodValue);
            var opData = JsonConvert.DeserializeObject<userTknDTO>(decrVal);
            if (opData != null)
            {
                var rigaOpr = await TDService.OperatoreSearch(opData.currOpr.MatrOpr, opData.currOpr.authKey);
                if (rigaOpr != null)
                {
                    await SetLastMatrOprAsync(rigaOpr.MatrOpr);

                    userTknDTO newUserTkn = new userTknDTO()
                    {
                        currOpr = rigaOpr,
                        DevGuid = devGuid
                    };

                    var jsonTkn = JsonConvert.SerializeObject(newUserTkn);
                    string hash = TDService.EncryptData(jsonTkn);
                    RigaOper = rigaOpr;
                    if (!hash.Equals(decodValue))
                    {
                        await SetCurrOperDtoLSAsync(hash);
                    }
                    if (saveOpr)
                    {
                        await TDService.OperatoreSetRedis(rigaOpr.MatrOpr, hash, devGuid);
                    }
                    answ = true;
                }
            }
            return answ;
        }

        public string EncryptData(string rawData)
        {
            return SteamCrypto.EncryptString(rawData, Constants.passPhrase);
        }

        /// <summary>
        /// Restituisce il record device GUID da localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<Guid> GetCurrDevGuidLSAsync()
        {
            Guid answ = new Guid();
            var result = await localStorage.GetItemAsync<string>("devGuid");
            if (result != null)
            {
                answ = Guid.Parse(result);
            }
            return answ;
        }

        /// <summary>
        /// Restituisce il record OperatoreDTO da localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<string> GetCurrOperDtoLSAsync()
        {
            string answ = "";
            var result = await localStorage.GetItemAsync<string>("currTkn");
            if (result != null)
            {
                answ = result;
            }
            return answ;
        }

        /// <summary>
        /// Restituisce il valore Ipv4 del Device da localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<string> getDevIpAsync()
        {
            string answ = "";
            var result = await localStorage.GetItemAsync<string>(KeyDevIp4);
            if (result != null)
            {
                answ = result;
            }
            return answ;
        }

        /// <summary>
        /// Restituisce il valore di DeviceSecret da localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<string> getDevSecretAsync()
        {
            string answ = "";
            var result = await localStorage.GetItemAsync<string>(KeyDevSec);
            if (result != null)
            {
                answ = result;
            }
            return answ;
        }

        public TimeSpan GetKeyTTL(string redKey)
        {
            TimeSpan answ = new TimeSpan();
            try
            {
                answ = redisDb.KeyTimeToLive(redKey) ?? new TimeSpan();
            }
            catch (Exception exc)
            {
                Log.Info($"Errore GetKeyTTL | currKey: {redKey}{Environment.NewLine}{exc}");
            }
            return answ;
        }

        /// <summary>
        /// Restituisce ultima matrOpr registrata da localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<int> GetLastMatrOprAsync()
        {
#if false
            int answ = -1;
            var result = await localStorage.GetItemAsync<string>("lastMatrOpr");
            if (!string.IsNullOrEmpty(result))
            {
                answ = int.Parse(result);
            }
            return answ; 
#endif
            int answ = await localStorage.GetItemAsync<int>("lastMatrOpr", -1);
            return answ;
        }

        /// <summary>
        /// Recupero dati MSE x macchina
        /// </summary>
        /// <param name="idxMacchina"></param>
        /// <returns></returns>
        public async Task<MappaStatoExplModel?> GetMachineMse(string idxMacchina)
        {
            MappaStatoExplModel answ = null;
            var rawData = await localStorage.GetItemAsync<string>(machineMse(idxMacchina));
            if (!string.IsNullOrEmpty(rawData))
            {
                answ = JsonConvert.DeserializeObject<MappaStatoExplModel>(rawData);
            }
            return answ;
        }

        /// <summary>
        /// Macchine attualmente selezionata
        /// </summary>
        public async Task<string> IdxMaccGet()
        {
            return await localStorage.GetItemAsync<string>("CurrMach");
        }

        /// <summary>
        /// Imposta Macchina
        /// </summary>
        public async Task IdxMaccSet(string machSel)
        {
            await localStorage.SetItemAsync("CurrMach", machSel);
        }

        /// <summary>
        /// Scrive sul local storage pagina corrente
        /// </summary>
        public async Task<string> LastOpenedPageGet()
        {
            return await localStorage.GetItemAsync<string>("LastPage");
        }

        /// <summary>
        /// Ottiene sul local storage pagina corrente
        /// </summary>
        public async Task LastOpenedPageSet(string lastPage)
        {
            await localStorage.SetItemAsync("LastPage", lastPage);
        }

        /// <summary>
        /// Effettua salvataggio in localstorage dei dati MSE correnti
        /// </summary>
        /// <param name="currListMSE"></param>
        /// <returns></returns>
        /// <exception cref="NotImplementedException"></exception>
        public async Task SaveMse(List<MappaStatoExplModel> currListMSE)
        {
            // procedo SOLO SE non sono in reloading...
            if (!IsReloading)
            {
                foreach (var item in currListMSE)
                {
                    string serVal = JsonConvert.SerializeObject(item);
                    await localStorage.SetItemAsync(machineMse(item.IdxMacchina), serVal);
                }
            }
        }

        /// <summary>
        /// Verifico esistenza chiave in session store
        /// </summary>
        /// <param name="keyName"></param>
        /// <returns></returns>
        public async Task<bool> SessHasVal(string keyName)
        {
            bool hasKey = await sessionStore.ContainKeyAsync(keyName);
            return hasKey;
        }

        /// <summary>
        /// scrive il record Device GUID nel localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<bool> SetCurrDevGuidLSAsync(Guid currDevGuid)
        {
            bool answ = false;
            await localStorage.SetItemAsync("devGuid", currDevGuid.ToString());
            answ = true;
            return answ;
        }

        /// <summary>
        /// scrive il record OperatoreDTO nel localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<bool> SetCurrOperDtoLSAsync(string currTkn)
        {
            bool answ = false;
            await localStorage.SetItemAsync("currTkn", currTkn);
            answ = true;
            return answ;
        }

        /// <summary>
        /// Clear del record OperatoreDTO nel localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<bool> ClearAllAsync()
        {
            bool answ = false;
            await localStorage.ClearAsync();
            answ = true;
            return answ;
        }

        /// <summary>
        /// Scrive il valore di IPV4 del device nel localstoragee
        /// </summary>
        /// <param name="newVal"></param>
        /// <returns></returns>
        public async Task<bool> setDevIpv4Async(string newVal)
        {
            bool answ = false;
            try
            {
                await localStorage.SetItemAsync(KeyDevIp4, newVal);
                answ = true;
            }
            catch (Exception ex)
            {
                Log.Error($"Eccezione in setDevIpv4Async{Environment.NewLine}{ex}");
            }
            return answ;
        }

        /// <summary>
        /// Scrive il valore di DeviceSecret nel localstoragee
        /// </summary>
        /// <param name="newVal"></param>
        /// <returns></returns>
        public async Task<bool> setDevSecretAsync(string newVal)
        {
            bool answ = false;
            try
            {
                await localStorage.SetItemAsync(KeyDevSec, newVal);
                answ = true;
            }
            catch (Exception ex)
            {
                Log.Error($"Eccezione in setDevSecretAsync{Environment.NewLine}{ex}");
            }
            return answ;
        }

        /// <summary>
        /// Salva matrOpr nel localstorage
        /// </summary>
        /// <returns></returns>
        public async Task<bool> SetLastMatrOprAsync(int matrOpr)
        {
            bool answ = false;
            await localStorage.SetItemAsync("lastMatrOpr", matrOpr);
            answ = true;
            return answ;
        }

        /// <summary>
        /// Recupero singola preferenza utente
        /// </summary>
        /// <param name="chiave"></param>
        /// <returns></returns>
        public string UserPrefGet(string chiave)
        {
            string answ = "";
            var currDict = UsersPrefDict;
            if (currDict.ContainsKey(chiave))
            {
                answ = currDict[chiave];
            }
            return answ;
        }

        /// <summary>
        /// Salvo singola preferenza utente
        /// </summary>
        /// <param name="chiave"></param>
        /// <param name="valore"></param>
        /// <returns></returns>
        public bool UserPrefSet(string chiave, string valore)
        {
            bool done = false;
            var currDict = UsersPrefDict;
            if (currDict.ContainsKey(chiave))
            {
                currDict[chiave] = valore;
            }
            else
            {
                currDict.Add(chiave, valore);
            }
            UsersPrefDict = currDict;
            return done;
        }

        /// <summary>
        /// Recupero singola preferenza utente se presente, oppure imposto quella di default
        /// indicata e la rendo
        /// </summary>
        /// <param name="chiave"></param>
        /// <returns></returns>
        public string UserPrefSetup(string chiave, string defValue)
        {
            string answ = defValue;
            var currDict = UsersPrefDict;
            if (currDict.ContainsKey(chiave))
            {
                answ = currDict[chiave];
            }
            else
            {
                if (MatrOpr > 0)
                {
                    UserPrefSet(chiave, defValue);
                }
            }
            return answ;
        }

        #endregion Public Methods

        #region Protected Fields

        protected const string KeyDevIp4 = "DevIpv4";

        protected const string KeyDevSec = "DevSec";

        protected const string KeyMacDict = "MachineDict";

        protected static IConfiguration _configuration = null!;

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

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

        #endregion Protected Fields

        #region Protected Properties

        protected int expDays { get; set; } = 0;
        protected ILocalStorageService localStorage { get; set; } = null!;
        protected ISessionStorageService sessionStore { get; set; } = null!;
        protected SharedMemService SMService { get; set; } = null!;
        protected TabDataService TDService { get; set; } = null!;

        #endregion Protected Properties

        #region Private Fields

        private AnagOperatoriModel? _rigaOper;

        /// <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 string lastIdxMacc = "";

        private DateTime lastUserUpd = DateTime.Now;

        private Logger Log = LogManager.GetCurrentClassLogger();

        private string redisBaseKey = "MP:TAB:User";

        private Random rnd = new Random();

        #endregion Private Fields

        #region Private Properties

        private List<MacchineModel>? userListMachine { get; set; } = null;
        private Dictionary<string, string> UserPrefs { get; set; } = new Dictionary<string, string>();

        #endregion Private Properties

        #region Private Methods

        private string machineMse(string idxMacc)
        {
            return $"MSE_{idxMacc}";
        }

        /// <summary>
        /// Recupero HashSet _redisConn come Dictionary
        /// </summary>
        /// <param name="currKey"></param>
        /// <param name="dict"></param>
        private Dictionary<string, string> redisHashDictGet(RedisKey currKey)
        {
            Dictionary<string, string> answ = new Dictionary<string, string>();
            try
            {
                answ = redisDb
                            .HashGetAll(currKey)
                            .ToDictionary(x => $"{x.Name}", x => $"{x.Value}");
            }
            catch (Exception exc)
            {
                Log.Info($"Errore redisHashDictGet | currKey: {currKey}{Environment.NewLine}{exc}");
            }
            return answ;
        }

        /// <summary>
        /// Salvataggio Dictionary come HashSet Redis
        /// </summary>
        /// <param name="currKey"></param>
        /// <param name="dict"></param>
        private bool redisHashDictSet(RedisKey currKey, Dictionary<string, string> dict)
        {
            bool fatto = false;
            try
            {
                HashEntry[] data2ins = new HashEntry[dict.Count];
                int i = 0;
                foreach (KeyValuePair<string, string> kvp in dict)
                {
                    data2ins[i] = new HashEntry(kvp.Key, kvp.Value);
                    i++;
                }
                // salvo!
                redisDb.HashSet(currKey, data2ins);
                fatto = true;
            }
            catch (Exception exc)
            {
                Log.Error($"Eccezione in redisHashDictSet | currKey: {currKey}{Environment.NewLine}{exc}");
            }
            return fatto;
        }

        #endregion Private Methods
    }
}