using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;
using dmeo040225.Models;
using dmeo040225.Services;
using PdfSharpCore.Drawing;
using PdfSharpCore.Pdf;

namespace dmeo040225;

public partial class HistoryOrdersWindow : Window
{
    ObservableCollection<Order> Orders = new ObservableCollection<Order>();
    List<Service> dataSourceServices;
    List<OrderPresenter> dataSourceOrders;
    public HistoryOrdersWindow()
    {
        InitializeComponent();
        using var context = new DatabaseContext();
        dataSourceOrders = context.Orders.Select(order => new OrderPresenter
        {
            Id = order.Id,
            Code = order.Code,
            Orderdata = order.Orderdata,
            Ordertime = order.Ordertime,
            UserId = order.UserId,
            Status = order.Status,
            Prokattime = order.Prokattime,
            Services = order.OrdersServices.Select(os => os.Service).ToList(),
            UserFio = context.Users.FirstOrDefault(u => u.Id == order.UserId).Fio,
            
            ServicesNames = new ObservableCollection<string>(
                order.OrdersServices.Select(os => os.Service.Name).ToList()
            )
        }).ToList();
        
        dataSourceServices = context.Services.Select(order => new Service()).ToList();

        ListBoxHistory.ItemsSource = Orders;
        FilterComboboxUsers.ItemsSource = context.Users.Select(user => user.Fio).ToList();
        FilterComboboxServices.ItemsSource = context.Services.Select(service => service.Name).ToList();
        DisplayServices();
        
        TimerService.Instance.TimeUpdated += UpdateTimerText;
        TimerService.Instance.TimerExpired += LogoutUser;
    }

    public class OrderPresenter() : Order
    {
        public List<Service> Services { get; set; } = new();
        public String UserFio;
        public ObservableCollection<string> ServicesNames { get; set; } = new();
    }

    public void DisplayServices()
    {
        var temp = dataSourceOrders;
        Orders.Clear();

        if (FilterComboboxUsers.SelectionBoxItem != null)
        {
            temp = temp.Where(u => u.UserFio == FilterComboboxUsers.SelectionBoxItem.ToString()).ToList();
        }
        
        if (FilterComboboxServices.SelectionBoxItem != null)
        {
            var selectedServiceName = FilterComboboxServices.SelectionBoxItem.ToString();
            temp = temp.Where(o => o.Services.Any(s => s.Name == selectedServiceName)).ToList();
        }
        
        foreach (var item in temp)
        {
            Orders.Add(item);
        }
    }

    private void FilterComboboxUsers_OnSelectionChanged(object? sender, SelectionChangedEventArgs e)
    {
        DisplayServices();
    }
    
    private void FilterComboboxServices_OnSelectionChanged(object? sender, SelectionChangedEventArgs e)
    {
        DisplayServices();
    }
    
    private void Back_OnClick(object? sender, RoutedEventArgs e)
    {
        Close();
    }
    
    private void UpdateTimerText(TimeSpan time)
    {
        TimerText.Text = $"Осталось: {time:mm\\:ss}";
    }

    private void LogoutUser()
    {
        Close();
        var mainWindow = new MainWindow();
        mainWindow.Show();
    }
    
    protected override void OnClosed(EventArgs e)
    {
        TimerService.Instance.TimeUpdated -= UpdateTimerText;
        TimerService.Instance.TimerExpired -= LogoutUser;
        base.OnClosed(e);
    }

    private void FormOrder_OnClick(object? sender, RoutedEventArgs e)
    {
        if (ListBoxHistory.SelectedItem is OrderPresenter selectedOrder)
        {
            var resultSum = 0;
            var serviceNames = "";

            using var document = new PdfDocument();
            var page = document.AddPage();
            var gfx = XGraphics.FromPdfPage(page);
    
            var font = new XFont("Arial", 14, XFontStyle.Regular);
    
            foreach (var service in selectedOrder.Services)
            {
                resultSum += int.Parse(service.Cost);
                serviceNames += service.Name + " ";
            }

            var lines = new List<string>
            {
                $"Дата заказа: {selectedOrder.Orderdata}",
                $"ID пользователя: {selectedOrder.UserId}",
                $"Код заказа: {selectedOrder.Code}",
                $"ФИО пользователя: {selectedOrder.UserFio}",
                $"Время заказа: {selectedOrder.Ordertime}",
                $"Услуги: {serviceNames}",
                $"Итоговая сумма: {resultSum}"
            };

            double x = 50, y = 50;
            double lineHeight = 20;

            foreach (var line in lines)
            {
                gfx.DrawString(line, font, XBrushes.Black, new XPoint(x, y));
                y += lineHeight;
            }

            string filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), $"Order_{selectedOrder.Id}.pdf");
            document.Save(filePath);
    
            Console.WriteLine($"PDF сохранен: {filePath}");
        }
    }
}