using System;
using System.Collections.Generic;
using System.Linq;
using Thermo.Active.Model.DatabaseModels;

namespace Thermo.Active.Database.Controllers
{
    public class ProdInfoController : IDisposable
    {
        private DatabaseContext dbCtx;

        public ProdInfoController()
        {
            // Initialize database context
            dbCtx = new DatabaseContext();
        }

        public void Dispose()
        {
            // Clear database context
            dbCtx.Dispose();
        }
        /// <summary>
        /// Get record by NumDone
        /// </summary>
        /// <param name="num"></param>
        /// <returns></returns>
        public ProdInfoModel FindByNumDone(int num)
        {
            return dbCtx
                .ProdInfo
                .Where(x => x.NumDone == num)
                .SingleOrDefault();
        }
        /// <summary>
        /// Get historical paginated data from DB (DESC ordered
        /// </summary>
        /// <param name="numStart"></param>
        /// <param name="numRecord"></param>
        /// <returns></returns>
        public List<ProdInfoModel> GetPaginated(int numStart, int numRecord)
        {
            // cehck numEnd
            int numEnd = numStart - numRecord;
            if (numEnd < 0)
                numEnd = 0;
            // retrieve
            return dbCtx
                .ProdInfo
                .Where(x => x.NumDone <= numStart && x.NumDone > numEnd)
                .OrderByDescending(x => x.DtEvent)
                .ToList();
        }
        /// <summary>
        /// Create new prodInfo record on DB
        /// </summary>
        /// <param name="NumTarget"></param>
        /// <param name="NumDone"></param>
        /// <param name="TimeWarm"></param>
        /// <param name="TimeVent"></param>
        /// <param name="TimeVacuum"></param>
        /// <param name="TimeCycleGross"></param>
        /// <param name="TimeCycleNet"></param>
        /// <param name="MaterialTempEndWarm"></param>
        /// <param name="MaterialTempEndVent"></param>
        /// <param name="MoldTemp"></param>
        /// <param name="VacuumReadVal"></param>
        /// <param name="MouldEnergyOUT"></param>
        /// <param name="MouldEnergyIN"></param>
        /// <returns></returns>
        public ProdInfoModel Create(short NumTarget, short NumDone, int TimeWarm, int TimeVent, int TimeVacuum, int TimeCycleGross, int TimeCycleNet, double MaterialTempEndWarm, double MaterialTempEndVent, double MoldTemp, double VacuumReadVal, double MouldEnergyOUT, double MouldEnergyIN)
        {
            // Create database machine model
            ProdInfoModel prodData = new ProdInfoModel()
            {
                DtEvent = DateTime.UtcNow,
                NumTarget = NumTarget,
                NumDone = NumDone,
                TimeWarm = TimeWarm,
                TimeVent = TimeVent,
                TimeVacuum = TimeVacuum,
                TimeCycleGross = TimeCycleGross,
                TimeCycleNet = TimeCycleNet,
                MaterialTempEndWarm = MaterialTempEndWarm,
                MaterialTempEndVent = MaterialTempEndVent,
                MoldTemp = MoldTemp,
                VacuumReadVal = VacuumReadVal,
                MouldEnergyOUT = MouldEnergyOUT,
                MouldEnergyIN = MouldEnergyIN
            };
            try
            {
                // Add to database
                dbCtx.ProdInfo.Add(prodData);
                // Commit changes
                dbCtx.SaveChanges();
            }
            catch
            { }

            return prodData;
        }

        /// <summary>
        /// Process table and keep only maxKeep most recent ones
        /// </summary>
        /// <param name="maxKeep"></param>
        /// <returns></returns>
        public bool PurgeOldest(int maxKeep)
        {
            bool answ = false;

            // check if purge needed
            int numRec = dbCtx.ProdInfo.Count();
            if (numRec > maxKeep)
            {
                ProdInfoModel firstToDelete = (ProdInfoModel)(from p in dbCtx.ProdInfo
                                                              orderby p.DtEvent descending
                                                              select p).Skip(maxKeep).Take(1);

                // call deletion
                dbCtx
                    .ProdInfo
                    .RemoveRange(
                        dbCtx
                        .ProdInfo
                        .Where(x => x.DtEvent <= firstToDelete.DtEvent)
                    );

                try
                {
                    // save!
                    dbCtx.SaveChanges();
                    answ = true;
                }
                catch
                { }
            }
            return answ;
        }

        /// <summary>
        /// Process table and delete all record (truncate)
        /// </summary>
        /// <returns></returns>
        public bool PurgeAll()
        {
            bool answ = false;

            try
            {
                dbCtx
                    .Database
                    .ExecuteSqlCommand("TRUNCATE TABLE prodInfo");
            }
            catch
            { }
            return answ;
        }
    }
}