import Vector from '../math/Vector';
import SteeringBehavior from './SteeringBehavior';
import Proximity from './Proximity';
import Steerable from './Steerable';

/**
 * {@code GroupBehavior} is the base class for the steering behaviors that take into consideration the agents in the game world
 * that are within the immediate area of the owner. This immediate area is defined by a {@link Proximity} that is in charge of
 * finding and processing the owner's neighbors through the given {@link ProximityCallback}.
 *
 * @param <T> Type of vector, either 2D or 3D, implementing the {@link Vector} interface
 *
 * @author davebaol
 */
abstract class GroupBehavior<T extends Vector<T>> extends SteeringBehavior<T> {

  /** The proximity decides which agents are considered neighbors. */
  protected proximity: Proximity<T>;

  /**
   * Creates a GroupBehavior for the specified owner and proximity.
   * @param owner the owner of this behavior.
   * @param proximity the proximity to detect the owner's neighbors
   */
  public constructor(owner: Steerable<T>, proximity: Proximity<T>) {
    super(owner);
    this.proximity = proximity;
  }

  /** Returns the proximity of this group behavior */
  public getProximity(): Proximity<T> {
    return this.proximity;
  }

  /**
   * Sets the proximity of this group behavior
   * @param proximity the proximity to set
   */
  public setProximity (proximity: Proximity<T>): void {
    this.proximity = proximity;
  }

}

export default GroupBehavior;