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 ImplementerStorage : IImplementerStorage
    {
        public List<ImplementerViewModel> GetFullList()
        {
            using var context = new PrecastConcretePlantDatabase();
            return context.Implementers
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public List<ImplementerViewModel> GetFilteredList(ImplementerSearchModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            return context.Implementers
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public ImplementerViewModel? GetElement(ImplementerSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            using var context = new PrecastConcretePlantDatabase();
            return context.Implementers
                    .FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id)
                    ?.GetViewModel;
        }

        public ImplementerViewModel? Insert(ImplementerBindingModel model)
        {
            var newImplementer = Implementer.Create(model);
            if (newImplementer == null)
            {
                return null;
            }
            using var context = new PrecastConcretePlantDatabase();
            context.Implementers.Add(newImplementer);
            context.SaveChanges();
            return context.Implementers
                .FirstOrDefault(x => x.Id == newImplementer.Id)
                ?.GetViewModel;
        }

        public ImplementerViewModel? Update(ImplementerBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var implementer = context.Implementers.FirstOrDefault(x => x.Id == model.Id);
            if (implementer == null)
            {
                return null;
            }
            implementer.Update(model);
            context.SaveChanges();
            return context.Implementers
                .FirstOrDefault(x => x.Id == model.Id)
                ?.GetViewModel;
        }

        public ImplementerViewModel? Delete(ImplementerBindingModel model)
        {
            using var context = new PrecastConcretePlantDatabase();
            var implementer = context.Implementers
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (implementer != null)
            {
                context.Implementers.Remove(implementer);
                context.SaveChanges();
                return implementer.GetViewModel;
            }
            return null;
        }
    }
}