namespace Moonlight.Frontend;

public static class Formatter
{
    public static string FormatSize(long bytes, double conversionStep = 1024)
    {
        if (bytes == 0) return "0 B";
    
        string[] units = ["B", "KB", "MB", "GB", "TB", "PB", "EB"];
        var unitIndex = 0;
        double size = bytes;
    
        while (size >= conversionStep && unitIndex < units.Length - 1)
        {
            size /= conversionStep;
            unitIndex++;
        }
    
        var decimals = unitIndex == 0 ? 0 : 2;
        return $"{Math.Round(size, decimals)} {units[unitIndex]}";
    }
    
    public static string FormatDuration(TimeSpan timeSpan)
    {
        var abs = timeSpan.Duration(); // Handle negative timespans
    
        if (abs.TotalSeconds < 1)
            return $"{abs.TotalMilliseconds:F0}ms";
    
        if (abs.TotalMinutes < 1)
            return $"{abs.TotalSeconds:F1}s";
    
        if (abs.TotalHours < 1)
            return $"{abs.Minutes}m {abs.Seconds}s";
    
        if (abs.TotalDays < 1)
            return $"{abs.Hours}h {abs.Minutes}m";
    
        if (abs.TotalDays < 365)
            return $"{abs.Days}d {abs.Hours}h";
    
        var years = (int)(abs.TotalDays / 365);
        var days = abs.Days % 365;
        return days > 0 ? $"{years}y {days}d" : $"{years}y";
    }
}