package de.neitzel.fxdesigner.preview;

import java.util.concurrent.*;

/** Owned example state. The NeitzelLib adapter requires C to be an ApplicationContext. */
public interface PreviewSession<M, C> extends AutoCloseable {
  M model();

  C context();

  /**
   * Called after View loading/CSS/layout, on FX. Never block FX; complete asynchronously if needed.
   */
  default CompletionStage<Void> ready() {
    return CompletableFuture.completedFuture(null);
  }

  /**
   * Release owned services/timers/listeners. Called once on FX, including load/readiness failure.
   */
  @Override
  void close() throws Exception;
}