using Microsoft.EntityFrameworkCore;
using PrecastConcretePlantContracts.BindingModels;
using PrecastConcretePlantContracts.SearchModels;
using PrecastConcretePlantContracts.StoragesContracts;
using PrecastConcretePlantContracts.ViewModels;
using PrecastConcretePlantDatabaseImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PrecastConcretePlantDatabaseImplement.Implements
{
    public class ReinforcedStorage : IReinforcedStorage
    {
        public ReinforcedViewModel? Delete(ReinforcedBindingModel model)
        {
            using var context = new PrecastConcretePlantDataBase();

            var element = context.Reinforceds.Include(x => x.Components).FirstOrDefault(rec => rec.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).Where(x => x.ReinforcedName.Contains(model.ReinforcedName)).ToList().Select(x => x.GetViewModel).ToList();
        }

        public List<ReinforcedViewModel> GetFullList()
        {
            using var context = new PrecastConcretePlantDataBase();

            return context.Reinforceds.Include(x => x.Components).ThenInclude(x => x.Component).ToList().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(rec => rec.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;
            }
        }
    }
}