namespace Evergreen.Health.Application.Health.Sleep;

public enum BedPresence { Unknown, Empty, Occupied }
public enum SleepDataAvailability { Unconfigured, Offline, Stale, Available }
public enum ObservedSleepStage { Unknown, Awake, Light, Deep }

/// <summary>设备读数归一化入口；不凭心率、睡眠阶段 0 或未知值推断有人/无人。</summary>
public sealed record SleepObservation(string SourceId, DateTimeOffset? ObservedAt,
    SleepDataAvailability Availability, BedPresence Presence,
    ObservedSleepStage Stage = ObservedSleepStage.Unknown,
    double? HeartRate = null, double? RespiratoryRate = null, bool? Movement = null);

public interface ISleepObservationSource
{
    string Key { get; }
    Task<SleepObservation> ReadAsync(CancellationToken cancellationToken);
}

/// <summary>JE01 尚未接入，不启动轮询，也不将假数据视作“无人”。</summary>
public sealed class ReservedJe01Source : ISleepObservationSource
{
    public string Key => "je01";
    public Task<SleepObservation> ReadAsync(CancellationToken cancellationToken)
    {
        cancellationToken.ThrowIfCancellationRequested();
        return Task.FromResult(new SleepObservation(Key, null, SleepDataAvailability.Unconfigured, BedPresence.Unknown));
    }
}

public sealed class SleepWorkflowOptions
{
    public bool Enabled { get; init; } = false;
    public TimeSpan StableBedDuration { get; init; } = TimeSpan.FromSeconds(30);
    public TimeSpan PostGuidanceFadeDelay { get; init; } = TimeSpan.FromSeconds(30);
    public TimeSpan MaximumObservationAge { get; init; } = TimeSpan.FromMinutes(2);
    public TimeSpan SameAnomalyReminderInterval { get; init; } = TimeSpan.FromMinutes(30);
    public int GuidanceVolumePercent { get; init; } = 50;
}