using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using LawFirmContracts.BindingModels;
using LawFirmContracts.Models;
using LawFirmContracts.SearchModels;
using LawFirmContracts.StorageContracts;
using LawFirmContracts.ViewModels;
using LawFirmDatabase.Models;
using Microsoft.EntityFrameworkCore;

namespace LawFirmDatabase.Implements
{
    public class ServiceStorage : IServiceStorage
    {
        public ServiceViewModel? Delete(ServiceBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var service = context.Services.FirstOrDefault(x => x.Id == model.Id);
            if (service == null)
            {
                return null;
            }
            context.Services.Remove(service);
            context.SaveChanges();
            return service.GetViewModel;
        }

        public ServiceViewModel? GetElement(ServiceSearchModel model)
        {
            if (model == null)
            {
                return null;
            }
            using var context = new LawFirmDBContext();
            if (model.Id.HasValue)
            {
                return context.Services
                    .FirstOrDefault(x => x.Id == model.Id)?.GetViewModel;
            }
            return null;
        }

        public List<ServiceViewModel> GetFilteredList(ServiceSearchModel model)
        {
            using var context = new LawFirmDBContext();
            return context.Services
                .Where(x => x.Id == model.Id)
                .Select(x => x.GetViewModel)
                .ToList();
        }

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

        public ServiceViewModel? Insert(ServiceBindingModel model)
        {
            using var context = new LawFirmDBContext();
            var newService = Service.Create(context, model);
            if (newService != null)
            {
                context.Services.Add(newService);
                context.SaveChanges();
                return newService.GetViewModel;
            }
            return null;
        }

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