namespace GoogleSheetsScheduleImport;

/// <summary>
/// Formats times for the existing occurrence parser (see Core.Parsers.EventOccurrenceGrammar / TimePatterns).
/// </summary>
public static class TimeFormatter
{
    public static string ToParserTimeString(TimeOnly time)
    {
        var h12 = time.Hour % 12;
        if (h12 == 0) h12 = 12;
        var minute = time.Minute;
        var isPm = time.Hour >= 12;
        var ap = isPm ? "p.m." : "a.m.";
        if (minute == 0)
            return $"{h12} {ap}";
        return $"{h12}:{minute:D2} {ap}";
    }

    public static string ToParserTimeRange(TimeOnly start, TimeOnly end)
    {
        if (start == end)
            return ToParserTimeString(start);
        return $"{ToParserTimeString(start)} - {ToParserTimeString(end)}";
    }
}