Service/AvaloniaAppApplication/MainWindow.axaml.cs

using Avalonia.Controls;
using AvaloniaAppApplication.DTO;
using AvaloniaAppApplication.Models;
using Microsoft.EntityFrameworkCore;
using MsBox.Avalonia;
using System;
using System.Collections.Generic;
using System.Linq;
using static System.Net.WebRequestMethods;

namespace AvaloniaAppApplication
{
    public partial class MainWindow : Window
    {
        public List<ServiceDTO> filteredServices = new List<ServiceDTO>();
        public List<ServiceDTO> servicesList = new List<ServiceDTO>();

        public MainWindow()
        {
            InitializeComponent();
            if (Manager.isAdmin == true)
            {
                AddServiceButton.IsVisible = true;
                ViewClosestAppointments.IsVisible = true;
            }
            loadServices();


        }

        public void loadServices()
        {
            servicesList = Manager.context.Services.Select(s =>
            new ServiceDTO
            {
                Id = s.Id,
                Title = s.Title,
                Discount = (float?)s.Discount,
                Description = s.Description,
                Durationinseconds = s.Durationinseconds,
                ClientServices = s.Clientservices,
                Cost = (float)s.Cost,
                MainImagePath = s.Mainimagepath,
                ImageBitmap = s.Mainimagepath != null ? new Avalonia.Media.Imaging.Bitmap(AppDomain.CurrentDomain.BaseDirectory.ToString() + s.Mainimagepath.Trim()) : null
            }).ToList();

            
            var comboPriceList = new List<string>() { "Ïî óìîë÷àíèþ", "Ïî âîçðàñòàíèþ öåíû", "Ïî óáûâàíèþ öåíû" };
            var comboFilterList = new List<string>() { "Âñå âàðèàíòû", " îò 0 äî 5%", "îò 5% äî 15%", " îò 15% äî 30%", "îò 30% äî 70%", "îò 70% äî 100%" };
            ComboPrice.ItemsSource = comboPriceList;
            ComboDiscount.ItemsSource = comboFilterList;
            ProductListBox.ItemsSource = servicesList;

            DisplayedItemsNumber.Text = servicesList.Count.ToString();
            TotalItemsNumber.Text = servicesList.Count.ToString();

            ComboDiscount.SelectedIndex = -1;
            ComboPrice.SelectedIndex = -1;
            ServiceSearchTextBox.Text = null;

        }

        public void method()
        {
            var list = Manager.context.Services.ToList();
            foreach ( var item in list )
            {
                if (item.Discount < 1)
                    item.Discount = item.Discount * 100;
            }
            Manager.context.SaveChanges();
        }
        private async void AddServiceButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            await new AddEditWindow().ShowDialog(this);
            loadServices();
        }

        private void ServiceSearchTextBox_TextChanged(object? sender, Avalonia.Controls.TextChangedEventArgs e)
        {
            UpdateListBox();
        }

        private void ComboPrice_SelectionChanged(object? sender, Avalonia.Controls.SelectionChangedEventArgs e)
        {
            UpdateListBox();

        }

        private void ComboDiscount_SelectionChanged(object? sender, Avalonia.Controls.SelectionChangedEventArgs e)
        {
            UpdateListBox();

        }

        public void UpdateListBox()
        {
            filteredServices = servicesList;

            // ïîèñê
            if (!string.IsNullOrEmpty(ServiceSearchTextBox.Text))
            {
                string searchText = ServiceSearchTextBox.Text.ToLower().Trim();
                filteredServices = filteredServices.Where(s => s.Title.ToLower().Trim().Contains(searchText) || s.Description != null && s.Description.ToLower().Trim().Contains(searchText)).ToList();
            }

            // ôèëüòðàöèÿ
            if (ComboDiscount.SelectedIndex > 0)
            {
                switch (ComboDiscount.SelectedIndex)
                {
                    case 1:
                        filteredServices = filteredServices.Where(s => s.Discount >= 0 && s.Discount < 5).ToList();
                        break;
                    case 2:
                        filteredServices = filteredServices.Where(s => s.Discount >= 5 && s.Discount < 15).ToList();
                        break;

                    case 3:
                        filteredServices = filteredServices.Where(s => s.Discount >= 15 && s.Discount < 30).ToList();
                        break;

                    case 4:
                        filteredServices = filteredServices.Where(s => s.Discount >= 30 && s.Discount < 70).ToList();
                        break;

                    case 5:
                        filteredServices = filteredServices.Where(s => s.Discount >= 70 && s.Discount < 100).ToList();
                        break;

                }
            }

            // ñîðòèðîâêà
            switch (ComboPrice.SelectedIndex)
            {
                case 1:
                    filteredServices = filteredServices.OrderBy(s => s.CostWithDiscount).ToList();
                    break;
                case 2:
                    filteredServices = filteredServices.OrderByDescending(s => s.CostWithDiscount).ToList();
                    break;
            }

            ProductListBox.ItemsSource = filteredServices;
            DisplayedItemsNumber.Text = filteredServices.Count.ToString();
            TotalItemsNumber.Text = servicesList.Count.ToString();
        }

        private async void EditButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            if (Manager.isAdmin == false)
            {
                var mes = MessageBoxManager.GetMessageBoxStandard("Îøèáêà!", "Òîëüêî àäìèíèñòðàòîð ìîæåò ïðàâèòü äàííûå!");
                var res = await mes.ShowWindowDialogAsync(this);
                return;
            }
            var serviceToEdit = (sender as Button).DataContext as ServiceDTO;
            await new AddEditWindow(serviceToEdit).ShowDialog(this);
            loadServices();
        }

        private async void DeleteButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            if (Manager.isAdmin == false)
            {

                var msss = MessageBoxManager.GetMessageBoxStandard("Îøèáêà!", "Òîëüêî àäìèíèñòðàòîð ìîæåò ïðàâèòü äàííûå!");
                var bb = await msss.ShowWindowDialogAsync(this);
                return;
            }


            var serviceFressed = (sender as Button).DataContext as ServiceDTO;
            var serviceToDelete = Manager.context.Services.FirstOrDefault(s => s.Id == serviceFressed.Id);
            var clientServicesToDelete = Manager.context.Clientservices
.Where(cs => cs.Serviceid == serviceToDelete.Id);
            Manager.context.Clientservices.RemoveRange(clientServicesToDelete);
            Manager.context.Services.Remove(serviceToDelete);
            Manager.context.SaveChanges();
            var mes = MessageBoxManager.GetMessageBoxStandard("OK!", "Èíôîðìàöèÿ óäàëåíà óñïåøíî!");
            var res = await mes.ShowWindowDialogAsync(this);
            loadServices();
            return;
        }

        private async void LogOutButton_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {

            AuthWindow authW = new AuthWindow();
            authW.Show();
            Close();
        }

        private void MenuItem_Click_1(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            if (Manager.isAdmin == true)
            {
                var selectedService = (sender as MenuItem).DataContext as ServiceDTO;
                if (selectedService != null)
                    new ClientServiceWindow(selectedService).ShowDialog(this);
            }
        }

        private void Button_Click_2(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
        {
            new ClientAppointmentsWindow().ShowDialog(this);
        }
    }
}