using PrecastConcretePlantContracts.BindingModels;
using PrecastConcretePlantContracts.SearchModels;
using PrecastConcretePlantContracts.StoragesContract;
using PrecastConcretePlantContracts.ViewModels;
using PrecastConcretePlantDatabaseImplement.Models;
using Microsoft.EntityFrameworkCore;

namespace PrecastConcretePlantDatabaseImplement
{
    public class ReinforcedStorage : IReinforcedStorage
    {
        public ReinforcedViewModel? Delete(ReinforcedBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var element = context.Reinforceds.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                context.Reinforceds.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public ReinforcedViewModel? GetElement(ReinforcedSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ReinforcedName) && !model.Id.HasValue)
            {
                return null;
            }
            using var context = new PrecastConcretePlantDatabase();
            return context.Reinforceds
                .Include(x => x.Components)
                .ThenInclude(x => x.Component)
                .FirstOrDefault
                (x => (!string.IsNullOrEmpty(model.ReinforcedName) && x.ReinforcedName == model.ReinforcedName) ||
                      (model.Id.HasValue && x.Id == model.Id)
                )?.GetViewModel;
        }

        public List<ReinforcedViewModel> GetFilteredList(ReinforcedSearchModel model)
        {
            if (string.IsNullOrEmpty(model.ReinforcedName))
            {
                return new();
            }
            using var context = new PrecastConcretePlantDatabase();
            return context.Reinforceds
                .Include(x => x.Components)
                .ThenInclude(x => x.Component)
                .Select(x => x.GetViewModel)
                .Where(x => x.ReinforcedName.Contains(model.ReinforcedName))
                .ToList();
        }

        public List<ReinforcedViewModel> GetFullList()
        {
            using var context = new PrecastConcretePlantDatabase();
            return context.Reinforceds
                .Include(x => x.Components)
                .ThenInclude(x => x.Component)
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public ReinforcedViewModel? Insert(ReinforcedBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var newReinforced = Reinforced.Create(context, model);
            if (newReinforced == null)
            {
                return null;
            }
            context.Reinforceds.Add(newReinforced);
            context.SaveChanges();
            return newReinforced.GetViewModel;
        }

        public ReinforcedViewModel? Update(ReinforcedBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var reinforced = context.Reinforceds.FirstOrDefault(x => x.Id == model.Id);
                if (reinforced == null)
                {
                    return null;
                }
                reinforced.Update(model);
                context.SaveChanges();
                reinforced.UpdateComponents(context, model);
                transaction.Commit();
                return reinforced.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }
    }
}