using System;
using Svrnty.CQRS.Events.Abstractions.Storage;

namespace Svrnty.CQRS.Events.Abstractions.Storage;

/// <summary>
/// Defines retention policy for an event stream.
/// Controls how long events are kept before automatic cleanup.
/// </summary>
public interface IRetentionPolicy
{
    /// <summary>
    /// Stream name this policy applies to.
    /// Use "*" for default policy that applies to all streams without specific policies.
    /// </summary>
    string StreamName { get; }

    /// <summary>
    /// Maximum age for events. Events older than this will be deleted.
    /// Null means no time-based retention.
    /// </summary>
    TimeSpan? MaxAge { get; }

    /// <summary>
    /// Maximum number of events to retain per stream.
    /// Only the most recent N events are kept, older events are deleted.
    /// Null means no size-based retention.
    /// </summary>
    long? MaxEventCount { get; }

    /// <summary>
    /// Whether this retention policy is currently enabled.
    /// Disabled policies are not enforced during cleanup.
    /// </summary>
    bool Enabled { get; }
}