using ElectronicsShopContracts.BindingModels;
using ElectronicsShopContracts.SearchModels;
using ElectronicsShopContracts.StorageContracts;
using ElectronicsShopContracts.ViewModels;
using ElectronicsShopDataBaseImplement.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Query.Internal;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ElectronicsShopDataBaseImplement.Implements
{
    public class ClientStorage : IClientStorage
    {
		public ClientViewModel? Insert(ClientBindingModel model) {
			var newComponent = Client.Create(model);
			if (newComponent == null) {
				return null;
			}
			using var context = new Database();
			context.Clients.Add(newComponent);
			context.SaveChanges();
			return newComponent.GetViewModel;
		}

		public ClientViewModel? Update(ClientBindingModel model) {
			using var context = new Database();
			var component = context.Clients.FirstOrDefault(x => x.ID == model.ID);
			if (component == null) {
				return null;
			}
			component.Update(model);
			context.SaveChanges();
			return component.GetViewModel;
		}

		public ClientViewModel? Delete(ClientBindingModel model)
        {
            using var context = new Database();
            var element = context.Clients.FirstOrDefault(rec => rec.ID == model.ID);
            if (element != null)
            {
                context.Clients.Remove(element);
                context.SaveChanges();
                return element.GetViewModel;
            }
            return null;
        }

        public ClientViewModel? GetElement(ClientSearchModel model)
        {
            using var context = new Database();
            if (model.ID.HasValue) {
                return context.Clients
                    .Include(x => x.Orders)
                    .FirstOrDefault(x => model.ID.HasValue &&
                                    x.ID == model.ID)
                    ?.GetViewModel;
            }
            else if (!string.IsNullOrEmpty(model.Email) && !string.IsNullOrEmpty(model.Passwrod)) {
                return context.Clients
                    .Include (x => x.Orders)
                    .FirstOrDefault(x => (x.Email == model.Email && x.Password == model.Passwrod))
                    ?.GetViewModel;
            }
            return new();
        }

        public List<ClientViewModel> GetFilteredList(ClientSearchModel model)
        {
            if (string.IsNullOrEmpty(model.Email))
            {
                return new();
            }
            using var context = new Database();
            return context.Clients.Where(x => !string.IsNullOrEmpty(model.ClientFIO) && x.ClientFIO
                                    .Contains(model.ClientFIO)).Select(x => x.GetViewModel).ToList();
        }

        public List<ClientViewModel> GetFullList()
        {
            using var context = new Database();
            return context.Clients.Select(x => x.GetViewModel).ToList();
        }
    }
}