using Prefab.Domain.Common;

namespace Prefab.Domain.Events;

/// <summary>
/// Event raised whenever a generic attribute is added, updated, or removed from an entity.
/// </summary>
/// <param name="Entity">The entity that owns the attribute.</param>
/// <param name="Key">The attribute key.</param>
/// <param name="Value">The attribute value involved in the change.</param>
/// <param name="ChangeType">Indicates the type of mutation performed.</param>
public record GenericAttributeChangedEvent(object Entity, string Key, object? Value, GenericAttributeChangeType ChangeType) : Event;

/// <summary>
/// Represents the types of mutations that can occur for a generic attribute.
/// </summary>
public enum GenericAttributeChangeType
{
    /// <summary>Attribute was added for the first time.</summary>
    Add,
    /// <summary>Attribute was updated with a new value.</summary>
    Update,
    /// <summary>Attribute was removed.</summary>
    Remove
}