using GPW.Data.DBModels;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using NLog;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GPW.Data.Controllers
{
    public class DbController : IDisposable
    {
        #region Private Fields

        private static IConfiguration _configuration;
        private static NLog.Logger Log = LogManager.GetCurrentClassLogger();

        #endregion Private Fields

        #region Public Constructors

        public DbController(IConfiguration configuration)
        {
            _configuration = configuration;
        }

        #endregion Public Constructors

        #region Public Methods

        public bool DbForceMigrate()
        {
            bool answ = false;
            using (GPWContext localDbCtx = new GPWContext(_configuration))
            {
                try
                {
                    localDbCtx.DbForceMigrate();
                    answ = true;
                }
                catch (Exception exc)
                {
                    Log.Error($"Eccezione in DbForceMigrate{Environment.NewLine}{exc}");
                }
            }
            return answ;
        }

        public void Dispose()
        {
            // Clear database context
            Log.Info("Dispose di DbController");
        }

        public List<CheckVc19> GetChecksVC19(int maxNum)
        {
            List<CheckVc19> dbResult = new List<CheckVc19>();
            using (GPWContext localDbCtx = new GPWContext(_configuration))
            {
                int numRec = localDbCtx
                .DbSetCheckVc19
                .Count();

                // se ho meno record che quelli richiesti --> riduco
                maxNum = numRec > maxNum ? maxNum : numRec;

                dbResult = localDbCtx
                .DbSetCheckVc19
                .OrderByDescending(x => x.DtCheck)
                .Take(maxNum)
                .ToList();
            }
            return dbResult;
        }

        public List<CheckVc19> GetChecksVC19Filt(int idxDip, DateTime dtStart, DateTime dtEnd)
        {
            List<CheckVc19> dbResult = new List<CheckVc19>();
            using (GPWContext localDbCtx = new GPWContext(_configuration))
            {
                DateTime oggi = DateTime.Today;
                dbResult = localDbCtx
                .DbSetCheckVc19
                .Where(x => (idxDip == 0 || x.IdxDipendente == idxDip) && (x.DtCheck >= dtStart && x.DtCheck <= dtEnd))
                .OrderByDescending(x => x.DtCheck)
                .ToList();
            }
            return dbResult;
        }

        public bool InsertCheck(DCCDecode updItem, string clientIp)
        {
            bool done = false;
            using (GPWContext localDbCtx = new GPWContext(_configuration))
            {
                try
                {
                    int idxDip = 0;
                    Dipendenti currUser = new Dipendenti()
                    {
                        IdxDipendente = 0
                    };
                    // per prima cosa cerca il dipendente x cognome/nome...
                    var userList = localDbCtx
                                        .DbSetDipendenti
                                        .Where(x => x.Cognome == updItem.nam.fn && x.Nome == updItem.nam.gn)
                                        .ToList();
                    // se ne ho solo 1 ok...
                    if (userList.Count > 1)
                    {
                        currUser = userList
                                       .Where(x => x.DataNascita != null && updItem.dob.Date == ((DateTime)x.DataNascita).Date)
                                       .FirstOrDefault();
                    }
                    // altrimenti cerco anche con DOB...
                    else if (userList.Count == 1)
                    {
                        // se lo trova inserisce check...
                        currUser = userList[0];
                    }

                    // fisso dipendente
                    idxDip = currUser.IdxDipendente;

                    // se trovato procedo
                    if (idxDip > 0)
                    {
                        string rawPayload = JsonConvert.SerializeObject(updItem);
                        CheckVc19 newItem = new CheckVc19()
                        {
                            IdxDipendente = idxDip,
                            DtCheck = DateTime.Now,
                            Payload = rawPayload
                        };
                        // aggiungo!
                        localDbCtx
                            .DbSetCheckVc19
                            .Add(newItem);

                        // verifico se ho timbratura ingresso
                        var listTimbra = localDbCtx
                                            .DbSetTimbrature
                                            .Where(x => x.IdxDipendente == idxDip)
                                            .ToList();
                        // se non ci fosse aggiungo
                        if (listTimbra == null || listTimbra.Count == 0)
                        {
                            var newIngresso = new Timbrature()
                            {
                                IdxDipendente = idxDip,
                                DataOra = DateTime.Now,
                                CodTipoTimb = "Web",
                                Ipv4 = clientIp,
                                Entrata = true,
                            };

                            // aggiungo!
                            localDbCtx
                                .DbSetTimbrature
                                .Add(newIngresso);
                        }

                        // ora salvo!
                        localDbCtx.SaveChanges();
                        done = true;
                    }
                    // altrimenti NON FA NULLA
                    else
                    {
                        Log.Info($"Attenzione, dipendente non trovato: {updItem.nam.fn} {updItem.nam.gn}");
                    }
                }
                catch (Exception exc)
                {
                    Log.Error($"Eccezione in UpdateApplicazioni:{Environment.NewLine}{exc}");
                }
            }
            return done;
        }

        /// <summary>
        /// Annulla modifiche su una specifica entity (cancel update)
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        public bool rollBackEntity(object item)
        {
            bool answ = false;
            using (GPWContext localDbCtx = new GPWContext(_configuration))
            {
                try
                {
                    if (localDbCtx.Entry(item).State == EntityState.Deleted || localDbCtx.Entry(item).State == EntityState.Modified)
                    {
                        localDbCtx.Entry(item).Reload();
                    }
                }
                catch (Exception exc)
                {
                    Log.Error($"Eccezione in rollBackEntity{Environment.NewLine}{exc}");
                }
            }
            return answ;
        }

        #endregion Public Methods
    }
}