using System.Collections.Concurrent;

namespace YD_TrainingCompetition_Api.Competition;

public sealed class ParticipantDirectory : IParticipantDirectory
{
    private readonly ConcurrentDictionary<string, RosterEntry> _entries = new(StringComparer.OrdinalIgnoreCase);

    public void ApplyRoster(IEnumerable<RosterEntry> entries)
    {
        _entries.Clear();
        foreach (var e in entries)
        {
            if (!string.IsNullOrWhiteSpace(e.DeviceId))
            {
                _entries[e.DeviceId] = e;
            }
        }
    }

    public RosterEntry? FindByDeviceId(string deviceId)
    {
        return _entries.TryGetValue(deviceId, out var e) ? e : null;
    }

    public IReadOnlyCollection<RosterEntry> GetAll() => _entries.Values.OrderBy(x => x.DeviceId, StringComparer.OrdinalIgnoreCase).ToArray();
}