using ScadaLink.Commons.Types.Enums;

namespace ScadaLink.Commons.Entities.Notifications;

/// <summary>
/// A single notification queued in the central outbox. Created at a site (where the
/// <see cref="NotificationId"/> GUID is generated) and forwarded to the central cluster
/// for delivery, retry, and audit. The lifecycle is tracked by <see cref="Status"/>.
/// </summary>
public class Notification
{
    /// <summary>GUID primary key, generated at the originating site.</summary>
    public string NotificationId { get; set; }
    public NotificationType Type { get; set; }
    public string ListName { get; set; }
    public string Subject { get; set; }
    public string Body { get; set; }

    /// <summary>JSON extensibility hook for channel-specific payload data.</summary>
    public string? TypeData { get; set; }
    public NotificationStatus Status { get; set; } = NotificationStatus.Pending;
    public int RetryCount { get; set; }
    public string? LastError { get; set; }

    /// <summary>Resolved delivery targets snapshotted at delivery time, for audit.</summary>
    public string? ResolvedTargets { get; set; }
    public string SourceSiteId { get; set; }
    public string? SourceInstanceId { get; set; }
    public string? SourceScript { get; set; }
    public DateTimeOffset SiteEnqueuedAt { get; set; }

    /// <summary>Central ingest time.</summary>
    public DateTimeOffset CreatedAt { get; set; }
    public DateTimeOffset? LastAttemptAt { get; set; }
    public DateTimeOffset? NextAttemptAt { get; set; }
    public DateTimeOffset? DeliveredAt { get; set; }

    public Notification(string notificationId, NotificationType type, string listName,
        string subject, string body, string sourceSiteId)
    {
        NotificationId = notificationId ?? throw new ArgumentNullException(nameof(notificationId));
        Type = type;
        ListName = listName ?? throw new ArgumentNullException(nameof(listName));
        Subject = subject ?? throw new ArgumentNullException(nameof(subject));
        Body = body ?? throw new ArgumentNullException(nameof(body));
        SourceSiteId = sourceSiteId ?? throw new ArgumentNullException(nameof(sourceSiteId));
    }
}
