using System;
using System.Globalization;
using Avalonia.Controls;
using Avalonia.Data.Converters;

namespace AdvancedCalculator.Converters;

public class WidthToSplitViewModeConverter : IValueConverter
{
    public static readonly WidthToSplitViewModeConverter Instance = new();

    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo? culture)
    {
        if (value is double width)
        {
            double threshold = 640;
            if (parameter is double p)
                threshold = p;
            else if (parameter is string s && double.TryParse(s, NumberStyles.Number, CultureInfo.InvariantCulture, out var parsed))
                threshold = parsed;

            return width < threshold ? SplitViewDisplayMode.Overlay : SplitViewDisplayMode.Inline;
        }
        return SplitViewDisplayMode.Inline;
    }

    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo? culture)
        => throw new NotSupportedException();
}