import type { Map as _ol_Map_ } from 'ol'
import type Feature from 'ol/Feature'
import type VectorLayer from 'ol/layer/Vector'
import type { StyleLike } from 'ol/style/Style'
import { Select } from 'ol/interaction'
import type { Coordinate } from 'ol/coordinate'
import type { Extent } from 'ol/extent'
import type { Options as SelectOptions } from 'ol/interaction/Select'
import type VectorSource from 'ol/source/Vector'
import type { Geometry } from 'ol/geom'

export interface Options extends SelectOptions {
  featureStyle?: StyleLike;
  selectCluster?: boolean;
  pointRadius?: number;
  spiral?: boolean;
  circleMaxObject?: number;
  maxObjects?: number;
  animate?: boolean;
  animationDuration?: number;
  autoClose?: boolean;
}

/**
 * @classdesc
 * Interaction for selecting vector features in a cluster.
 * It can be used as an ol.interaction.Select.
 * When clicking on a cluster, it springs apart to reveal the features in the cluster.
 * Revealed features are selectable and you can pick the one you meant.
 * Revealed features are themselves a cluster with an attribute features that contain the original feature.
 *
 * @constructor
 * @extends {ol.interaction.Select}

 * @fires ol.interaction.SelectEvent
 * @api stable
 */
export default class SelectCluster extends Select {
  /**
   * @param {olx.interaction.SelectOptions=} options SelectOptions.
   *  @param {ol.style.StyleLike} options.featureStyle used to style the revealed features as options.style is used by the Select interaction.
   *  @param {boolean} options.selectCluster false if you don't want to get cluster selected
   *  @param {Number} options.pointRadius to calculate distance between the features
   *  @param {bool} options.spiral means you want the feature to be placed on a spiral (or a circle)
   *  @param {Number} options.circleMaxObjects number of object that can be place on a circle
   *  @param {Number} options.maxObjects number of object that can be drawn, other are hidden
   *  @param {bool} options.animate if the cluster will animate when features spread out, default is false
   *  @param {Number} options.animationDuration animation duration in ms, default is 500ms
   *  @param {boolean} options.autoClose if selecting a cluster should close previously selected clusters. False to get toggle feature. Default is true
   */
  constructor(options?: Options);

  /**
   * Remove the interaction from its current map, if any,  and attach it to a new
   * map, if any. Pass `null` to just remove the interaction from the current map.
   * @param {Map} map Map.
   * @api stable
   */
  setMap(map: _ol_Map_): void;

  /**
   * Clear the selection, close the cluster and remove revealed features
   * @api stable
   */
  clear(): void;

  /**
   * Get the layer for the revealed features
   * @api stable
   */
  getLayer(): VectorLayer<VectorSource<Feature<Geometry>>>;

  /**
   * Select a cluster
   * @param {Feature} a cluster feature ie. a feature with a 'features' attribute.
   * @api stable
   */
  selectCluster(a: Feature): void;

  /** Helper function to get the extent of a cluster
   * @param {ol.feature} feature
   * @return {ol.extent|null} the extent or null if extent is empty (no cluster or superimposed points)
   */
  getClusterExtent(feature: Feature): Extent | null

  /**
   * Animate the cluster and spread out the features
   * @param {Array<Coordinate>} the center of the cluster
   */
  animateCluster_(center: Coordinate[], feature: Feature): void;
}