import type { Map as _ol_Map_ } from 'ol'
import { Coordinate } from 'ol/coordinate'
import type Feature from 'ol/Feature'
import type Event from 'ol/events/Event'
import type { Positioning } from 'ol/Overlay'
import Popup from './Popup'

export interface Options {
  popupClass?: string;
  maximumFractionDigits?: number;
  formatLength?: (length: number) => string;
  formatArea?: (area: number) => string;
  getHTML?: (feature: Feature, info: string) => string;
  offsetBox?: number | number[];
  Positioning?: Positioning | string;
}

/** A tooltip element to be displayed over the map and attached on the cursor position.
 * @constructor
 * @extends {Overlay.Popup}
 * @api stable
 */
export default class Tooltip extends Popup {
  /**
   * @param {} options Extend Popup options
   *  @param {String} options.popupClass the a export class of the overlay to style the popup.
   *  @param {number} options.maximumFractionDigits maximum digits to display on measure, default 2
   *  @param {function} options.formatLength a function that takes a number and returns the formated value, default length in meter
   *  @param {function} options.formatArea a function that takes a number and returns the formated value, default length in square-meter
   *  @param {function} options.getHTML a function that takes a feature and the info string and return a formated info to display in the tooltip, default display feature measure & info
   *  @param {Number|Array<number>} options.offsetBox an offset box
   *  @param {OverlayPositioning | string | undefined} options.positionning
   *   the 'auto' positioning var the popup choose its positioning to stay on the map.
   */
  constructor(options?: Options);

  /**
   * Set the map instance the control is associated with
   * and add its controls associated to this map.
   * @param {_ol_Map_} map The map instance.
   */
  setMap(map: _ol_Map_): void;

  /** Get the information to show in the tooltip
   * The area/length will be added if a feature is attached.
   * @param {Feature|undefined} feature the feature
   * @param {string} info the info string
   * @api
   */
  getHTML(feature?: Feature, info?: string): void;

  /** Set the Tooltip info
   * If information is not null it will be set with a delay,
   * thus watever the information is inserted, the significant information will be set.
   * ie. ttip.setInformation('ok'); ttip.setInformation(null); will set 'ok'
   * ttip.set('info','ok'); ttip.set('info', null); will set null
   * @param {string} what The information to display in the tooltip, default remove information
   */
  setInfo(what?: string): void;

  /** Remove the current featue attached to the tip
   * Similar to setFeature() with no argument
   */
  removeFeature(): void;

  /** Format area to display in the popup.
   * Can be overwritten to display measure in a different unit (default: square-metter).
   * @param {number} area area in m2
   * @return {string} the formated area
   * @api
   */
  formatArea(area: number): string;

  /** Format area to display in the popup
   * Can be overwritten to display measure in different unit (default: meter).
   * @param {number} length length in m
   * @return {string} the formated length
   * @api
   */
  formatLength(length: number): string;

  /** Set a feature associated with the tooltips, measure info on the feature will be added in the tooltip
   * @param {Feature|Event} feature an Feature or an event (object) with a feature property
   */
  setFeature(feature?: Feature | Event): void;

  /**
   * Set a close box to the popup.
   * @param {bool} b
   * @api stable
   */
  setClosebox(b: boolean): void;

  /**
   * Set the CSS export class of the popup.
   * @param {string} c export class name.
   * @api stable
   */
  setPopupClass(c: string): void;

  /**
   * Add a CSS export class to the popup.
   * @param {string} c export class name.
   * @api stable
   */
  addPopupClass(c: string): void;

  /**
   * Remove a CSS export class to the popup.
   * @param {string} c export class name.
   * @api stable
   */
  removePopupClass(c: string): void;

  /**
   * Set positionning of the popup
   * @param {OverlayPositioning | string | undefined} pos an OverlayPositioning
   *    or 'auto' to var the popup choose the best position
   * @api stable
   */
  setPositioning(pos?: Positioning | string): void;

  /** Check if popup is visible
   * @return {boolean}
   */
  getVisible(): boolean;

  /**
   * Set the position and the content of the popup.
   * @param {Coordinate|string} coordinate the coordinate of the popup or the HTML content.
   * @param {string|undefined} html the HTML content (undefined = previous content).
   * @example
   var popup = new Overlay.Popup();
   // Show popup
   popup.show([166000, 5992000], "Hello world!");
   // Move popup at coord with the same info
   popup.show([167000, 5990000]);
   // set new info
   popup.show("New informations");
   * @api stable
   */
  /**
   * Hide the popup
   * @api stable
   */
  hide(): void;
}