using System;
using System.Globalization;
using System.Windows.Data;

namespace ytLive.Helpers;

/// <summary>
/// True when a log entry's sequence falls inside the range a clicked alert points at. Two numbers
/// rather than a membership collection: the log list is virtualised, and rows that are already
/// realised do not re-evaluate when a collection changes — but they do when a bound number changes.
/// </summary>
public sealed class LogInRangeConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object? parameter, CultureInfo culture)
    {
        if (values.Length < 3) return false;
        if (values[0] is not long sequence) return false;
        if (values[1] is not long from || values[2] is not long to) return false;
        if (from == 0 && to == 0) return false;
        return sequence >= from && sequence <= to;
    }

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