using System;
using System.Collections.Generic;
using System.Linq;
using Avalonia.Controls;
using Avalonia.Interactivity;
using System.IO;
using ZXing;
using ZXing.Common;
using PdfSharpCore.Drawing;
using PdfSharpCore.Pdf;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;
using dmeo040225.Models;
using dmeo040225.Services;

namespace dmeo040225;

public partial class NewOrder : Window
{
    public List<string> OrderServicesList { get; }
    public List<string> OrderClientsList { get; }
    public NewOrder()
    {
        InitializeComponent();
        LoadOrderId();
        using var context = new DatabaseContext();
        
        OrderClientsList = context.Users.Select(it => it.Fio).ToList();
        OrderClientComboBox.ItemsSource = OrderClientsList;
        
        OrderServicesList = context.Services.Select(it => it.Name).ToList();
        OrderServicesListBox.ItemsSource = OrderServicesList;

        // Подключаемся к обновлениям таймера
        TimerService.Instance.TimeUpdated += UpdateTimerText;
        TimerService.Instance.TimerExpired += LogoutUser;
    }
    
    private void UpdateTimerText(TimeSpan time)
    {
        TimerText.Text = $"Осталось: {time:mm\\:ss}";
    }

    private void LogoutUser()
    {
        Close();
        var mainWindow = new MainWindow();
        mainWindow.Show();
    }
    
    private void Back_OnClick(object? sender, RoutedEventArgs e)
    {
        Close();
    }

    protected override void OnClosed(EventArgs e)
    {
        TimerService.Instance.TimeUpdated -= UpdateTimerText;
        TimerService.Instance.TimerExpired -= LogoutUser;
        base.OnClosed(e);
    }
    
    private void LoadOrderId()
    {
        using var context = new DatabaseContext();
        var maxId = context.Orders.Any() ? context.Orders.Max(order => order.Id) : 0;
        var newOrderId = maxId + 1;
        OrderIdTextBox.Text = newOrderId.ToString();
    }

    private void CreateOrderButton_OnClick(object? sender, RoutedEventArgs e)
    {
        using var context = new DatabaseContext();
        
        var maxId = context.Orders.Any() ? context.Orders.Max(order => order.Id) : 0;
        var newOrderId = maxId + 1;
        var newCodeOrder = $"{newOrderId}/{DateTime.Now:dd.MM.yyyy}";
        var newPeriod = int.TryParse(PeriodTextBox.Text, out int period) ? period : 0;
        
        var selectedClientFio = OrderClientComboBox.SelectedItem as string;
        if (string.IsNullOrEmpty(selectedClientFio))
        {
            Console.WriteLine("Выберите клиента!");
            return;
        }

        var client = context.Users.FirstOrDefault(it => it.Fio == selectedClientFio);
        if (client == null)
        {
            Console.WriteLine("Ошибка: клиент не найден!");
            return;
        }
        
        var selectedServices = OrderServicesListBox.SelectedItems.Cast<string>().ToList();
        if (selectedServices.Count == 0)
        {
            Console.WriteLine("Выберите хотя бы одну услугу!");
            return;
        }

        var services = context.Services.Where(s => selectedServices.Contains(s.Name)).ToList();
        
        var newOrder = new Order
        {
            Id = newOrderId,
            Code = newCodeOrder,
            Orderdata = DateTime.Now,
            Ordertime = TimeOnly.FromDateTime(DateTime.Now),
            UserId = client.Id,
            Status = "Открыт",
            Prokattime = newPeriod
        };

        context.Orders.Add(newOrder);
        context.SaveChanges();
        
        // foreach (var service in services)
        // {
        //     var orderService = new OrdersService
        //     {
        //         OrderId = newOrder.Id,
        //         ServiceId = service.Id
        //     };
        //     context.OrdersServices.Add(orderService);
        // }

        context.SaveChanges();
        LoadOrderId();
        
        Console.WriteLine("Заказ создан");
        
        GenerateBarcodeAndSavePdf(newOrderId, DateTime.Now, newPeriod);
    }
    
    public void GenerateBarcodeAndSavePdf(int orderId, DateTime orderDate, int rentalPeriod)
    {
        var random = new Random();
        string uniqueCode = string.Concat(Enumerable.Range(0, 6).Select(_ => random.Next(0, 10)));
        
        string barcodeData = $"{orderId}{orderDate:ddMMyy}{rentalPeriod}{uniqueCode}";
        
        var writer = new BarcodeWriterPixelData
        {
            Format = BarcodeFormat.CODE_128,
            Options = new EncodingOptions
            {
                Height = 229,
                Width = 350,
                Margin = 0
            }
        };
        var pixelData = writer.Write(barcodeData);
        
        using var image = new Image<Rgba32>(pixelData.Width, pixelData.Height);
        image.Mutate(ctx =>
        {
            for (int y = 0; y < pixelData.Height; y++)
            {
                for (int x = 0; x < pixelData.Width; x++)
                {
                    byte value = pixelData.Pixels[(y * pixelData.Width + x) * 4];
                    image[x, y] = new Rgba32(value, value, value, 255);
                }
            }
        });
        
        using var ms = new MemoryStream();
        image.SaveAsPng(ms);
        ms.Position = 0;
        
        using var document = new PdfDocument();
        var page = document.AddPage();
        var gfx = XGraphics.FromPdfPage(page);
        
        using var img = XImage.FromStream(() => new MemoryStream(ms.ToArray()));
        gfx.DrawImage(img, 10, 10, 150, 50);
        
        gfx.DrawString(barcodeData, new XFont("Arial", 10), XBrushes.Black, new XPoint(10, 70));
        
        string filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), $"Order_{orderId}.pdf");
        document.Save(filePath);
        Console.WriteLine($"PDF сохранен: {filePath}");
    }
}