import {inherits} from '../src/ol/index.js';
import Map from '../src/ol/Map.js';
import View from '../src/ol/View.js';
import {defaults as defaultControls} from '../src/ol/control.js';
import Control from '../src/ol/control/Control.js';
import TileLayer from '../src/ol/layer/Tile.js';
import OSM from '../src/ol/source/OSM.js';


/**
 * Define a namespace for the application.
 */
window.app = {};
const app = window.app;


//
// Define rotate to north control.
//


/**
 * @constructor
 * @extends {module:ol/control/Control~Control}
 * @param {Object=} opt_options Control options.
 */
app.RotateNorthControl = function(opt_options) {

  const options = opt_options || {};

  const button = document.createElement('button');
  button.innerHTML = 'N';

  const this_ = this;
  const handleRotateNorth = function() {
    this_.getMap().getView().setRotation(0);
  };

  button.addEventListener('click', handleRotateNorth, false);
  button.addEventListener('touchstart', handleRotateNorth, false);

  const element = document.createElement('div');
  element.className = 'rotate-north ol-unselectable ol-control';
  element.appendChild(button);

  Control.call(this, {
    element: element,
    target: options.target
  });

};
inherits(app.RotateNorthControl, Control);


//
// Create map, giving it a rotate to north control.
//


const map = new Map({
  controls: defaultControls({
    attributionOptions: {
      collapsible: false
    }
  }).extend([
    new app.RotateNorthControl()
  ]),
  layers: [
    new TileLayer({
      source: new OSM()
    })
  ],
  target: 'map',
  view: new View({
    center: [0, 0],
    zoom: 3,
    rotation: 1
  })
});