namespace CitySim.Ui.DesignSystem.World;

/// <summary>Runtime sample for the design-system showcase. Add to an object in a lit scene.</summary>
public sealed class WorldPiecesShowcase : Component
{
 GameObject marker;
 GameObject label;
 GameObject feedback;
 float responseAge = 1;
 bool responding;

 protected override void OnStart()
 {
  marker = WorldPieces.Marker(GameObject);
  marker.LocalPosition = Vector3.Zero;
  label = WorldPieces.Label(GameObject, GameText.Get("ui.world_pieces_showcase.claimed_plot"));
  label.LocalPosition = Vector3.Up * 30;
 }

 /// <summary>Replay a small, non-blocking response.</summary>
 public void Replay()
 {
  if (!marker.IsValid()) return;
  if (feedback.IsValid()) feedback.Destroy();
  marker.LocalScale = Vector3.One;
  responding = true;
  responseAge = 0;
  feedback = WorldPieces.Feedback(GameObject, "+2", marker.WorldPosition + Vector3.Up * 48, 1.1f);
 }

 protected override void OnUpdate()
 {
  if (!responding || !marker.IsValid()) return;
  responseAge += Time.Delta;
  var t = Math.Clamp(responseAge / 0.28f, 0, 1);
  // A small ease-out pulse which returns exactly to rest.
  var pulse = 0.16f * MathF.Sin(t * MathF.PI) * (1 - t);
  marker.LocalScale = new Vector3(1 + pulse, 1 + pulse, 1);
  if (t >= 1) { marker.LocalScale = Vector3.One; responding = false; }
 }

 protected override void OnDestroy()
 {
  if (feedback.IsValid()) feedback.Destroy();
  if (marker.IsValid()) marker.Destroy();
  if (label.IsValid()) label.Destroy();
 }
}