WhiteErase/WriteErase/ClassWindows/WindowOrderView.xaml.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using WriteErase.ClassBase;
using WriteErase.ClassData;

namespace WriteErase.ClassWindows
{
    /// <summary>
    /// Логика взаимодействия для WindowOrderView.xaml
    /// </summary>
    public partial class WindowOrderView : Window,INotifyPropertyChanged
    {
        public WindowOrderView()
        {
            InitializeComponent();
            init();
        }        

        private void init()
        {
            if(UserSession.user == null)
                btnNewOrder.Visibility = Visibility.Collapsed;
            cbPoint.ItemsSource = BaseConnection.kotBase.PickupPoint.ToList().Select(tb => tb.PickupPointAdress);            
            lvProduct.ItemsSource = UserBasket.basket;
            calculateCost();
        }
        private void calculateCost()
        {
            tbkCountProduct.Text = "Количество товаров в корзине: " + UserBasket.basket.Count;

            double oldCost = 0;
            double newCost = 0;

            foreach (Product product in UserBasket.basket)
            {
                oldCost += (double)product.ProductCost * product.CountProduct;
                newCost += (double)product.Cost * product.CountProduct;
            }

            int discount = (int)Math.Round((1 - (newCost / oldCost)) * 100);

            if (oldCost == newCost)
            {
                tbkOldCost.Visibility = Visibility.Collapsed;
                tbkDiscount.Visibility = Visibility.Collapsed;
            }

            tbkDiscount.Text = discount.ToString() + " %";
            tbkOldCost.Text = string.Format("{0:C2}", oldCost);
            tbkNowCost.Text = string.Format("{0:C2}", newCost);

            if (UserBasket.basket.Count == 0)
                btnNewOrder.Visibility = Visibility.Collapsed;
        }
        private void cbPointTextChanged(object sender, TextChangedEventArgs e)
        {
            cbPoint.IsDropDownOpen = true;
            TextBox tb = (TextBox)e.OriginalSource;
            tb.Select(tb.SelectionStart + tb.SelectionLength, 0);
            CollectionView cv = (CollectionView)CollectionViewSource.GetDefaultView(cbPoint.ItemsSource);
            cv.Filter = s => ((string)s).IndexOf(cbPoint.Text, StringComparison.CurrentCultureIgnoreCase) >= 0;
        }

        private void ProductDeleteClick(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            Product product = BaseConnection.kotBase.Product.FirstOrDefault(tb => tb.ProductArticleNumber == btn.Uid);
            UserBasket.basket.Remove(product);
            calculateCost();
        }

        private void ChangeCountClick(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            Product product = BaseConnection.kotBase.Product.FirstOrDefault(tb => tb.ProductArticleNumber == btn.Uid);
            switch (btn.Content)
            {
                case "+":
                    {
                        product.CountProduct += 1;
                        break;
                    }
                case "+10":
                    {
                        product.CountProduct += 10;
                        break;
                    }
                case "-":
                    {
                        product.CountProduct -= 1;
                        break;
                    }
                case "-10":
                    {
                        product.CountProduct -= 10;
                        break;
                    }
            }

            if(product.CountProduct <= 0)
            {
                product.CountProduct = 0;
                UserBasket.basket.Remove(product);                
            }            

            calculateCost();
        }

        public event PropertyChangedEventHandler PropertyChanged;
        public void OnPropertyChanged([CallerMemberName] string prop = "")
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(prop));
        }

        private void btnNewOrderClick(object sender, RoutedEventArgs e)
        {
            try
            {
                if (cbPoint.SelectedIndex >= 0 && UserBasket.basket.Count > 0)
                {
                    Random rnd = new Random();
                    int code;
                    while (true)//генерируем код
                    {
                        code = rnd.Next(100, 1000);
                        if (BaseConnection.kotBase.Order.Where(tb => tb.OrderCode == code).Count() == 0)
                            break;
                    }
                    PickupPoint point = BaseConnection.kotBase.PickupPoint.First(tb => tb.PickupPointAdress == cbPoint.SelectedValue);
                    Order newOrder = new Order()
                    {
                        OrderStatus = "Новый",
                        OrderDate = DateTime.Now,
                        OrderCode = code,
                        OrderPickupPoint = point.PickupPointId,
                        OrderClienr = UserSession.user.UserSurname + " " + UserSession.user.UserName + " " + UserSession.user.UserPatronymic
                    };
                    BaseConnection.kotBase.Order.Add(newOrder);
                    BaseConnection.kotBase.SaveChanges();
                    int count = 0;
                    foreach (Product item in UserBasket.basket)
                    {
                        if (item.ProductQuantityInStock >= item.CountProduct)
                            count++;

                        OrderProduct op = new OrderProduct()
                        {
                            OrderID = newOrder.OrderID,
                            ProductArticleNumber = item.ProductArticleNumber,
                            ProductCount = item.CountProduct
                        };
                        BaseConnection.kotBase.OrderProduct.Add(op);
                    }

                    if (count > 3)
                        newOrder.OrderDeliveryDate = DateTime.Now.AddDays(3);
                    else
                        newOrder.OrderDeliveryDate = DateTime.Now.AddDays(6);
                    BaseConnection.kotBase.SaveChanges();

                    MessageBox.Show("Заказ успешно добавлен\nКод получения: " + newOrder.OrderCode);
                    UserBasket.basket.Clear();
                }
                else
                {
                   if(cbPoint.SelectedIndex < 0) MessageBox.Show("Выберите пункт выдачи");
                   if(UserBasket.basket.Count <= 0) MessageBox.Show("Количество товаров в корзине должно быть больше 1");
                }
            }
            catch(Exception ex)
            {
                Debug.WriteLine(ex.Message);
            }
        }
    }
}