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 HumanStorage : IHumanStorage
    {
        public List<HumanVM> GetFullList()
        {
            using var context = new LogisticContext();
            return context.Humans.FromSqlRaw("Select * From Human").Include(u => u.Status)
                    .ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public List<HumanVM> GetFilteredList(HumanSM model)
        {
            if (!model.StatusId.HasValue)
            {
                return new();
            }
            using var context = new LogisticContext();
            return context.Humans
                    .FromSqlRaw("Select * FROM Human WHERE status_id = {0}", model.StatusId).Include(u => u.Status)
                    .ToList()
                    .Select(x => x.GetViewModel)
                    .ToList();

        }

        public HumanVM? GetElement(HumanSM model)
        {
            if (!model.Id.HasValue && string.IsNullOrEmpty(model.Phone))
            {
                return null;
            }
            using var context = new LogisticContext();
            return context.Humans
                .FirstOrDefault(x => (model.Id.HasValue && x.Id == model.Id) || (!string.IsNullOrEmpty(model.Phone) && x.Phone.Equals(model.Phone)))
                ?.GetViewModel;
        }

        public HumanVM? Insert(HumanBM model)
        {
            using var context = new LogisticContext();
            var newHuman = Human.Create(context, model);
            if (newHuman == null)
            {
                return null;
            }
            context.Humans.Add(newHuman);
            context.SaveChanges();
            return newHuman.GetViewModel;
        }

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

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