using R3;

namespace GodotHostTest.Interfaces;

/// <summary>
///     An event bus that summarizes information from all <see cref="ITargetSpawner" />'s targets.
/// </summary>
public interface ITargetEventBus
{
    /// <summary>
    ///     A target has timed out and disappeared.
    /// </summary>
    Observable<Unit> TimedOut { get; }

    /// <summary>
    ///     A target has been hit.
    /// </summary>
    Observable<Unit> Hit { get; }

    /// <summary>
    ///     Callback method to invoke when a new target spawner has been added.
    /// </summary>
    /// <param name="targetSpawner">The new target spawner.</param>
    void NewTargetSpawner(ITargetSpawner targetSpawner);
}