using System;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Data;
using Avalonia.Markup.Xaml;

namespace AutoCat.Views;

public partial class PlateView : UserControl
{
    #region Dependency properties
    
    public static readonly StyledProperty<string> NumberProperty =
        AvaloniaProperty.Register<PlateView, string>(nameof(Number));

    #endregion

    #region Properties
    
    public string Number
    {
        get => (string)GetValue(NumberProperty);
        set => SetValue(NumberProperty, value);
    }

    #endregion

    private const double AspectRatio = 112.0 / 520.0;

    static PlateView()
    {
        NumberProperty.Changed.AddClassHandler<PlateView>((v, e) => v.NumberChanged(e));
    }

    public PlateView()
    {
        InitializeComponent();
    }

    private void NumberChanged(AvaloniaPropertyChangedEventArgs e)
    {
        if (e.NewValue is not string newNumber)
            return;
        
        var number = new PlateNumber(newNumber);
        NumberBox.Text = number.MainPart();
        RegionBox.Text = number.Region();
    }

    protected override Size MeasureOverride(Size availableSize)
    {
        var newAspect = availableSize.Height / availableSize.Width;
        
        return newAspect >= AspectRatio
            ? new Size(availableSize.Width, availableSize.Width * AspectRatio)
            : new Size(availableSize.Height / AspectRatio, availableSize.Height);
    }

    private void UserControl_SizeChanged(object sender, SizeChangedEventArgs e)
    {
        NumberBox.Margin = new Thickness(0, -e.NewSize.Height * 0.35, 0, 0);
        RegionBox.FontSize = e.NewSize.Height * 0.65;
        RegionBox.Margin = new Thickness(0, -RegionBox.FontSize * 0.3, 0, 0);
        FlagGrid.Width = FlagGrid.Height * 1.5;

        if (CountryRow.Height > 0)
        {
            CountryName.FontSize = CountryRow.Height;
        }
    }
}