import EventTarget from '../../../../../src/ol/events/Target.js';
import Interaction, {
  zoomByDelta,
} from '../../../../../src/ol/interaction/Interaction.js';
import {FALSE} from '../../../../../src/ol/functions.js';
import {Map, View} from '../../../../../src/ol/index.js';
import {
  clearUserProjection,
  useGeographic,
} from '../../../../../src/ol/proj.js';

describe('ol.interaction.Interaction', function () {
  describe('constructor', function () {
    let interaction;

    beforeEach(function () {
      interaction = new Interaction({});
    });

    it('creates a new interaction', function () {
      expect(interaction).to.be.a(Interaction);
      expect(interaction).to.be.a(EventTarget);
    });

    it('creates an active interaction', function () {
      expect(interaction.getActive()).to.be(true);
    });
  });

  describe('#getMap()', function () {
    it('retrieves the associated map', function () {
      const map = new Map({});
      const interaction = new Interaction({});
      interaction.setMap(map);
      expect(interaction.getMap()).to.be(map);
    });

    it('returns null if no map', function () {
      const interaction = new Interaction({});
      expect(interaction.getMap()).to.be(null);
    });
  });

  describe('#setMap()', function () {
    it('allows a map to be set', function () {
      const map = new Map({});
      const interaction = new Interaction({});
      interaction.setMap(map);
      expect(interaction.getMap()).to.be(map);
    });

    it('accepts null', function () {
      const interaction = new Interaction({});
      interaction.setMap(null);
      expect(interaction.getMap()).to.be(null);
    });
  });

  describe('#handleEvent()', function () {
    class MockInteraction extends Interaction {
      constructor() {
        super(...arguments);
      }
      handleEvent(mapBrowserEvent) {
        return false;
      }
    }

    it('has a default event handler', function () {
      const interaction = new Interaction({});
      expect(interaction.handleEvent()).to.be(true);
    });

    it('allows event handler overrides via options', function () {
      const interaction = new Interaction({
        handleEvent: FALSE,
      });
      expect(interaction.handleEvent()).to.be(false);
    });

    it('allows event handler overrides via class extension', function () {
      const interaction = new MockInteraction({});
      expect(interaction.handleEvent()).to.be(false);
    });
  });
});

describe('zoomByDelta - useGeographic', () => {
  beforeEach(useGeographic);
  afterEach(clearUserProjection);

  it('works with a user projection set', () => {
    const view = new View({
      center: [0, 0],
      zoom: 0,
    });

    const spy = sinon.spy(view, 'animate');

    const anchor = [90, 45];
    const duration = 10;
    zoomByDelta(view, 1, anchor, duration);

    expect(spy.callCount).to.be(1);
    const options = spy.getCall(0).args[0];
    expect(options.anchor).to.be(anchor);
  });
});