namespace MeterVault.Core.Domain;

/// <summary>
/// A raw, immutable, timestamped meter value — the audit truth (SDD §5.3 <c>reading</c>).
/// Backed by a TimescaleDB hypertable with composite key (meter_id, time).
/// The value is a register / level / hours / rate in the meter's own unit.
/// </summary>
public sealed class Reading
{
    public DateTimeOffset Time { get; set; }

    public int MeterId { get; set; }

    public double Value { get; set; }

    public int? SourceId { get; set; }

    public ReadingQuality Quality { get; set; }

    public ReadingFlags Flags { get; set; }

    /// <summary>Provenance batch when this row came from a CSV/bulk import (revert support).</summary>
    public int? ImportBatchId { get; set; }
}