'use strict';

import { getChildDebugElementByType } from '../../../../tests/helpers';
import { Component } from '@angular/core';
import {
  inject,
  TestComponentBuilder
} from '@angular/core/testing';

import { StickySidebar } from '../index';

describe('Common components', () => {
  describe('StickySidebar Component', () => {
    let builder;
    let component;
    let fixture;

    beforeEach(inject([TestComponentBuilder], (tcb) => {
      builder = tcb;
      fixture = builder.createSync(TestApp);
      let debugEl = getChildDebugElementByType(fixture.debugElement, StickySidebar);
      component = debugEl.injector.get(StickySidebar);
    }));


    it('should init component', () => {
      expect(component).not.toBeNull();
    });

    it('should start unsticked', () => {
      spyOn(component, 'stick').and.callThrough();
      spyOn(component, 'stickBottom').and.callThrough();
      fixture.detectChanges();
      expect(component.stick).not.toHaveBeenCalled();
      expect(component.stickBottom).not.toHaveBeenCalled();
    });

    it('should stick to the top on the next VM tick', (done) => {
      spyOn(component, 'stick').and.callThrough();
      spyOn(component, 'stickBottom').and.callThrough();
      fixture.detectChanges();
      setTimeout(() => {
        expect(component.stick).toHaveBeenCalled();
        expect(component.stickBottom).toHaveBeenCalled();
        done();
      });
    });

    it('should stick if scrolled more than scrollYOffset', () => {
      spyOn(component, 'stick').and.callThrough();
      fixture.detectChanges();
      component.scrollParent = {
        pageYOffset: 40
      };
      component.updatePosition();
      expect(component.stick).toHaveBeenCalled();
    });

    // TODO: add tests for stickBottom
  });
});


/** Test component that contains an ApiInfo. */
@Component({
  selector: 'test-app',
  directives: [StickySidebar],
  template:
      `<div style="padding-top: 20px">
        <div style="height: 20px; position: fixed; top: 0;"> </div>
        <div style="position: relative">
          <div sticky-sidebar [scrollParent]="scrollParent" [scrollYOffset]="options.scrollYOffset">
          </div>
        </div>
      </div>`

})
class TestApp {
  options: any;
  scrollParent: Window;
  constructor() {
    this.options = {};
    this.scrollParent = window;
    this.options.scrollYOffset = () => 20;
  }
}