namespace Campaign_Tracker.Server.ExtensionData;

/// <summary>
/// Result of a nightly (or on-demand) extension-to-legacy referential integrity check (AC #4).
/// Targeting at least 99.9% <see cref="ConsistencyPercentage"/> (NFR13).
/// </summary>
public sealed record LegacyLinkIntegrityReport(
    DateTimeOffset CheckedAt,
    int TotalRecords,
    int ConsistentRecords,
    int FailedRecords,
    double ConsistencyPercentage,
    IReadOnlyList<LegacyLinkIntegrityFailure> Failures)
{
    /// <summary>True when no failures were detected (or no records exist to check).</summary>
    public bool IsConsistent => FailedRecords == 0;
}

/// <summary>Describes one extension record that failed to resolve its legacy link.</summary>
public sealed record LegacyLinkIntegrityFailure(
    string RecordType,
    string RecordId,
    LegacyLinkReference Reference,
    string Reason);