using Contracts.BindingModels;
using Contracts.SearchModel;
using Contracts.Storage;
using Contracts.ViewModels;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DataBase.Implements
{
    public class StatusStorage : IStatusStorage
    {
        public List<StatusVM> GetFullList()
        {
            using var context = new LogisticContext();
            return context.Statuses.FromSqlRaw("Select * From Status")
                    .ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

       

        public StatusVM? GetElement(StatusSM model)
        {
            if (!model.Id.HasValue && string.IsNullOrEmpty(model.Title))
            {
                return null;
            }
            using var context = new LogisticContext();
            return context.Statuses
                .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id) || (string.IsNullOrEmpty(model.Title) && x.Title.Equals(model.Title)))
                ?.GetViewModel;
        }

        public StatusVM? Insert(StatusBM model)
        {
            using var context = new LogisticContext();
            var newStatus = Status.Create(context, model);
            if (newStatus == null)
            {
                return null;
            }
            context.Statuses.Add(newStatus);
            context.SaveChanges();
            return newStatus.GetViewModel;
        }

        public StatusVM? Update(StatusBM model)
        {
            using var context = new LogisticContext();
            using var transaction = context.Database.BeginTransaction();
            try
            {
                var status = context.Statuses.FirstOrDefault(rec => rec.Id == model.Id);
                if (status == null)
                {
                    return null;
                }
                status.Update(model);
                context.SaveChanges();
                transaction.Commit();
                return status.GetViewModel;
            }
            catch
            {
                transaction.Rollback();
                throw;
            }
        }

        public StatusVM? Delete(StatusBM model)
        {
            using var context = new LogisticContext();
            var element = context.Statuses
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Statuses.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }
    }
}