namespace MeetingAssistant.MeetingNotes;

internal static class MeetingAttendeeNames
{
    public static string NormalizeDisplayName(string attendee)
    {
        var trimmed = attendee.Trim();
        var emailStart = trimmed.IndexOf('<', StringComparison.Ordinal);
        return emailStart > 0 ? trimmed[..emailStart].Trim() : trimmed;
    }

    public static List<string> NormalizeDistinct(IEnumerable<string> attendees)
    {
        return attendees
            .Select(attendee => attendee.Trim())
            .Where(attendee => !string.IsNullOrWhiteSpace(attendee))
            .Distinct(StringComparer.OrdinalIgnoreCase)
            .ToList();
    }
}