namespace StellaOps.Notify.WebService.Contracts;

/// <summary>
/// Retention policy configuration request/response.
/// </summary>
public sealed record RetentionPolicyDto
{
    /// <summary>
    /// Retention period for delivery records in days.
    /// </summary>
    public int DeliveryRetentionDays { get; init; } = 90;

    /// <summary>
    /// Retention period for audit log entries in days.
    /// </summary>
    public int AuditRetentionDays { get; init; } = 365;

    /// <summary>
    /// Retention period for dead-letter entries in days.
    /// </summary>
    public int DeadLetterRetentionDays { get; init; } = 30;

    /// <summary>
    /// Retention period for storm tracking data in days.
    /// </summary>
    public int StormDataRetentionDays { get; init; } = 7;

    /// <summary>
    /// Retention period for inbox messages in days.
    /// </summary>
    public int InboxRetentionDays { get; init; } = 30;

    /// <summary>
    /// Retention period for event history in days.
    /// </summary>
    public int EventHistoryRetentionDays { get; init; } = 30;

    /// <summary>
    /// Whether automatic cleanup is enabled.
    /// </summary>
    public bool AutoCleanupEnabled { get; init; } = true;

    /// <summary>
    /// Cron expression for automatic cleanup schedule.
    /// </summary>
    public string CleanupSchedule { get; init; } = "0 2 * * *";

    /// <summary>
    /// Maximum records to delete per cleanup run.
    /// </summary>
    public int MaxDeletesPerRun { get; init; } = 10000;

    /// <summary>
    /// Whether to keep resolved/acknowledged deliveries longer.
    /// </summary>
    public bool ExtendResolvedRetention { get; init; } = true;

    /// <summary>
    /// Extension multiplier for resolved items.
    /// </summary>
    public double ResolvedRetentionMultiplier { get; init; } = 2.0;
}

/// <summary>
/// Request to update retention policy.
/// </summary>
public sealed record UpdateRetentionPolicyRequest
{
    public required RetentionPolicyDto Policy { get; init; }
}

/// <summary>
/// Response for retention policy operations.
/// </summary>
public sealed record RetentionPolicyResponse
{
    public required string TenantId { get; init; }
    public required RetentionPolicyDto Policy { get; init; }
}

/// <summary>
/// Response for retention cleanup execution.
/// </summary>
public sealed record RetentionCleanupResponse
{
    public required string TenantId { get; init; }
    public required bool Success { get; init; }
    public string? Error { get; init; }
    public required DateTimeOffset ExecutedAt { get; init; }
    public required double DurationMs { get; init; }
    public required RetentionCleanupCountsDto Counts { get; init; }
}

/// <summary>
/// Cleanup counts DTO.
/// </summary>
public sealed record RetentionCleanupCountsDto
{
    public int Deliveries { get; init; }
    public int AuditEntries { get; init; }
    public int DeadLetterEntries { get; init; }
    public int StormData { get; init; }
    public int InboxMessages { get; init; }
    public int Events { get; init; }
    public int Total { get; init; }
}

/// <summary>
/// Response for cleanup preview.
/// </summary>
public sealed record RetentionCleanupPreviewResponse
{
    public required string TenantId { get; init; }
    public required DateTimeOffset PreviewedAt { get; init; }
    public required RetentionCleanupCountsDto EstimatedCounts { get; init; }
    public required RetentionPolicyDto PolicyApplied { get; init; }
    public required IReadOnlyDictionary<string, DateTimeOffset> CutoffDates { get; init; }
}

/// <summary>
/// Response for last cleanup execution.
/// </summary>
public sealed record RetentionCleanupExecutionResponse
{
    public required string ExecutionId { get; init; }
    public required string TenantId { get; init; }
    public required DateTimeOffset StartedAt { get; init; }
    public DateTimeOffset? CompletedAt { get; init; }
    public required string Status { get; init; }
    public RetentionCleanupCountsDto? Counts { get; init; }
    public string? Error { get; init; }
}

/// <summary>
/// Response for cleanup all tenants.
/// </summary>
public sealed record RetentionCleanupAllResponse
{
    public required IReadOnlyList<RetentionCleanupResponse> Results { get; init; }
    public required int SuccessCount { get; init; }
    public required int FailureCount { get; init; }
    public required int TotalDeleted { get; init; }
}