SUBD_PIbd-21_Balberova_D.N./BeautySaloon/BeautySaloonDatabaseImplement/Implements/ServiceStorage.cs

using BeautySaloonContracts.BindingModels;
using BeautySaloonContracts.SearchModels;
using BeautySaloonContracts.StoragesContracts;
using BeautySaloonContracts.ViewModels;
using Microsoft.Data.SqlClient;
using Microsoft.EntityFrameworkCore;
using System.Diagnostics;

namespace BeautySaloonDatabaseImplement.Implements
{
    public class ServiceStorage : IServiceStorage
    {
        public ServiceViewModel? Delete(ServiceBindingModel model)
        {
            using var context = new NewdbContext();
            var element = context.Services
                .FirstOrDefault(rec => rec.Id == model.Id);
            if (element != null)
            {
                context.Services.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public ServiceViewModel? GetElement(ServiceSearchModel model)
        {
            using var context = new NewdbContext();
            if (model.Id.HasValue)
                return context.Services
                    .FirstOrDefault(x => x.Id == model.Id)?
                    .GetViewModel;
            if (!string.IsNullOrEmpty(model.Name))
                return context.Services
                    .FirstOrDefault(x => x.Name.Equals(model.Name))?
                    .GetViewModel;
            return null;
        }

        public List<ServiceViewModel> GetFilteredList(ServiceSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Name))
            {
                return new();
            }
            using var context = new NewdbContext();
            return context.Services
                .Where(x => x.Name.Contains(model.Name))
                .Select(x => x.GetViewModel)
                .ToList();
        }

        public List<ServiceViewModel> GetFullList()
        {
            using var context = new NewdbContext();
            return context.Services
                    .Select(x => x.GetViewModel)
                    .ToList();
        }

        public ServiceViewModel? Insert(ServiceBindingModel model)
        {
            using var context = new NewdbContext();
            model.Id = context.Services
                .Count() > 0 ? context.Services.Max(x => x.Id) + 1 : 1;
            var newService = Service.Create(model);
            if (newService == null)
            {
                return null;
            }
            context.Services.Add(newService);
            context.SaveChanges();
            return newService.GetViewModel;
        }

        public List<ReportViewModel> ReadMostPopular()
        {
            using var context = new NewdbContext();
            /*var temp = context.Services
                    .Select(x => x.GetViewModel)
                    .ToList();*/
            return context.ServiceOrders
                .Include(x => x.Service)
                .GroupBy(x => x.Service.Name)
                .Select(x => new ReportViewModel()
                {
                    Name = x.Key,
                    Sum = x.Sum(x => x.Service.Price)
                })
                .OrderByDescending(x => x.Sum)

                .ToList();
        }

        public ServiceViewModel? Update(ServiceBindingModel model)
        {
            using var context = new NewdbContext();
            var service = context.Services
                .FirstOrDefault(x => x.Id == model.Id);
            if (service == null)
            {
                return null;
            }
            service.Update(model);
            context.SaveChanges();
            return service.GetViewModel;
        }
    }
}