namespace Evergreen.Health.Application.Health.Sleep;

/// <summary>本版没有异常判定算法；未来规则只产生事件，不直接操作音箱或家具。</summary>
public sealed record SleepAnomaly(string Code, string Description, DateTimeOffset ObservedAt);
public interface ISleepAnomalyRule
{
    string Key { get; }
    SleepAnomaly? Evaluate(IReadOnlyList<SleepObservation> observations);
}

/// <summary>每个舒睡会话独立持有；只有语音实际播报后才记录提醒时间。</summary>
public sealed class AnomalyReminderGate
{
    private readonly TimeSpan _interval;
    private readonly Dictionary<string, DateTimeOffset> _delivered = new(StringComparer.OrdinalIgnoreCase);
    private readonly object _lock = new();
    public AnomalyReminderGate(SleepWorkflowOptions options) => _interval = options.SameAnomalyReminderInterval;
    public bool CanRemind(string code, DateTimeOffset now)
    {
        lock (_lock) return !_delivered.TryGetValue(code, out var last) || now - last >= _interval;
    }
    public void MarkDelivered(string code, DateTimeOffset now)
    {
        lock (_lock) _delivered[code] = now;
    }
}