using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Media.Imaging;
using Demka_Snova_1.Hardik.Conect;
using Demka_Snova_1.Hardik.Conect.Dao;
using PdfSharpCore.Drawing;
using PdfSharpCore.Pdf;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demka_Snova_1.OknaFunciy;

public partial class AddZakazWindow : Window
{
    private List<KlientDao> _allClients;
    private List<uslugiDao> _allServices;
    private List<SelectedService> _selectedServices = new();
    private KlientDao _selectedClient;
    private int _nextOrderId;
    private string _generatedBarcodeData;

    //private TextBox OrderNumberTextBox => this.FindControl<TextBox>("OrderNumberTextBox");
    //private TextBox ClientSearchTextBoxTextBox => this.FindControl<TextBox>("ClientSearchTextBoxTextBox");
    private TextBox ServiceSearchTextBox => this.FindControl<TextBox>("ServiceSearchTextBox");
    //private TextBox TotalPriceTextBlock => this.FindControl<TextBox>("TotalPriceTextBlock");
    //private DataGrid ClientsDataGrid => this.FindControl<DataGrid>("ClientsDataGrid");
    //private DataGrid ServicesDataGrid => this.FindControl<DataGrid>("ServicesDataGrid");
    //private DataGrid SelectedServicesDataGrid => this.FindControl<DataGrid>("SelectedServicesDataGrid");




    public AddZakazWindow()
    {
        InitializeComponent();
        this.Loaded += OnWindowLoaded;
    }

    private void OnWindowLoaded(object sender, RoutedEventArgs e)
    {
        LoadData();
    }

    private async void LoadData()
    {
        try
        {
            using (var db = new DatabaseConnection())
            {
                _allClients = db.GetAllKlienti();
                _allServices = db.GetAllUslugi();

                foreach(var service in _allServices)
                {
                    service.Code = Convert.ToString(service.Code);
                }

                var orders = db.GetAllOrders();
                _nextOrderId = orders.Count > 0 ? orders.Max(o => o.ID) + 1 : 1;

                OrderNumberTextBox.Text = _nextOrderId.ToString();
                OrderNumberTextBox.Watermark = $"Рекомендуемый номер: {_nextOrderId}";

                ClientsDataGrid.ItemsSource = _allClients;
                ServicesDataGrid.ItemsSource = _allServices;
            }
        }
        catch (Exception ex)
        {
            await ShowError($"Ошибка загрузки данных: {ex.Message}");
        }
    }

    private void OrderNumberTextBox_KeyDown(object sender, Avalonia.Input.KeyEventArgs e)
    {
        if (e.Key == Avalonia.Input.Key.Enter)
        {
            if (int.TryParse(OrderNumberTextBox.Text, out int orderNum))
            {
                _nextOrderId = orderNum;
            }
            else
            {
                OrderNumberTextBox.Text = _nextOrderId.ToString();
            }
        }
    }

    private void ClientSearchTextBox_TextChanged(object sender, TextChangedEventArgs e)
    {
        var searchText = this.FindControl<TextBox>("ClientSearchTextBox").Text.ToLower();
        ClientsDataGrid.ItemsSource = _allClients
            .Where(c => c.Fio.ToLower().Contains(searchText) ||
                       c.Code.ToString().Contains(searchText))
            .ToList();
    }

    private void ServiceSearchTextBox_TextChanged(object sender, TextChangedEventArgs e)
    {
        var searchText = ServiceSearchTextBox.Text.ToLower();
        ServicesDataGrid.ItemsSource = _allServices
            .Where(s => s.Name.ToLower().Contains(searchText) ||
                        s.Code.ToString().Contains(searchText))
            .ToList();
    }

    private void ClientsDataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        _selectedClient = ClientsDataGrid.SelectedItem as KlientDao;
        UpdateButtonsState();
    }

    private async void AddClientButton_Click(object sender, RoutedEventArgs e)
    {
        var addClientWindow = new AddClientWindow();
        var result = await addClientWindow.ShowDialog<KlientDao>(this);

        if (result != null)
        {
            try
            {
                using (var db = new DatabaseConnection())
                {
                    _allClients.Add(result);
                    ClientsDataGrid.ItemsSource = _allClients;
                    ClientsDataGrid.SelectedItem = result;
                }
            }
            catch (Exception ex)
            {
                await ShowError($"Ошибка при добавлении клиента: {ex.Message}");
            }
        }
    }

    private async void AddServiceButton_Click(object sender, RoutedEventArgs e)
    {
        var selectedService = ServicesDataGrid.SelectedItem as uslugiDao;
        if (selectedService == null)
        {
            await ShowError("Выберите услугу из списка");
            return;
        }

        /*var hoursWindow = new InputHoursWindow(selectedService.Name);
        var hours = await hoursWindow.ShowDialog<int?>(this);

        if (hours.HasValue && hours > 0)
        {
            _selectedServices.Add(new SelectedService
            {
                Id = selectedService.id.ToString(),
                Name = selectedService.Name,
                PrisePerH = selectedService.PrisePerH,
                Hours = hours.Value
            });

            UpdateSelectedServices();
        }*/
    }

    private void RemoveServiceButton_Click(object sender, RoutedEventArgs e)
    {
        var selected = SelectedServicesDataGrid.SelectedItem as SelectedService;
        if (selected != null)
        {
            _selectedServices.Remove(selected);
            UpdateSelectedServices();
        }
    }

    private void UpdateSelectedServices()
    {
        SelectedServicesDataGrid.ItemsSource = _selectedServices.ToList();
        TotalPriceTextBlock.Text = $"Итого: {_selectedServices.Sum(s => s.Total)} руб.";
        UpdateButtonsState();
    }

    private async void SaveOrderButton_Click(object sender, RoutedEventArgs e)
    {
        if (_selectedClient == null || !_selectedServices.Any())
        {
            await ShowError("Выберите клиента и добавьте хотя бы одну услугу");
            return;
        }

        try
        {
            using (var db = new DatabaseConnection())
            {
                var order = new ordersDao
                {
                    ID = _nextOrderId,
                    CodeZakaz = _generatedBarcodeData,
                    Date = DateOnly.FromDateTime(DateTime.Now),
                    Time = TimeOnly.FromDateTime(DateTime.Now),
                    CodeClient = _selectedClient.Code.ToString(),
                    Usluga = string.Join(", ", _selectedServices.Select(s => $"{s.Name} ({s.Hours}ч)")),
                    Status = "Активен",
                    Prokat = _selectedServices.Sum(s => s.Hours)
                };

                db.AddOrder(order);

                var orderData = $"дата_заказа={DateTime.Now:yyyy-MM-ddTHH:mm:ss}&номер_заказа={_nextOrderId}";
                var base64Data = Convert.ToBase64String(Encoding.UTF8.GetBytes(orderData));
                var orderLink = $"C:/Users/PC/source/Dopolnenia/Fails/Doky";


                var linkPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
                                          $"Ссылка_заказа_{_nextOrderId}.txt");
                File.WriteAllText(linkPath, orderLink);

                var pdfPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
                         $"Штрих-код_{_nextOrderId}.pdf");

                await ShowError($"Заказ №{_nextOrderId} успешно сохранен!\n" +
                              $"Штрих-код сохранен в: {pdfPath}\n" +
                              $"Ссылка сохранена в: {linkPath}");

                this.Close();
            }
        }
        catch (Exception ex)
        {
            await ShowError($"Ошибка при сохранении заказа: {ex.Message}");
        }
    }

    private void CancelButton_Click(object sender, RoutedEventArgs e)
    {
        this.Close();
    }

    private void UpdateButtonsState()
    {
        SaveOrderButton.IsEnabled = _selectedClient != null && _selectedServices.Any();
    }

    private async Task ShowError(string message)
    {
        var dialog = new Window
        {
            Title = "Информация",
            Content = new TextBlock { Text = message },
            Width = 400,
            Height = 200,
            WindowStartupLocation = WindowStartupLocation.CenterScreen
        };
        
        // await dialog.Show()
        await dialog.ShowDialog(this);
    }
}