import { Cleaner, Step, Waiter } from '@ephox/agar';
import { UnitTest } from '@ephox/bedrock-client';
import { DomEvent, EventArgs, SugarElement } from '@ephox/sugar';

import * as GuiFactory from 'ephox/alloy/api/component/GuiFactory';
import * as AlloyEvents from 'ephox/alloy/api/events/AlloyEvents';
import * as SystemEvents from 'ephox/alloy/api/events/SystemEvents';
import { Container } from 'ephox/alloy/api/ui/Container';
import * as GuiSetup from 'ephox/alloy/test/GuiSetup';

UnitTest.asynctest('Browser Test: events.BroadcastingEventsTest', (success, failure) => {

  const cleanup = Cleaner();

  const bodyMargin = [
    'body { margin-top: 2000px; }'
  ];

  GuiSetup.setup((store, _doc, _body) => GuiFactory.build(
    Container.sketch({
      dom: {
        styles: {
          'overflow-x': 'hidden',
          'background': 'blue',
          'max-width': '300px',
          'height': '20px'
        }
      },
      events: AlloyEvents.derive([
        AlloyEvents.run<EventArgs>(SystemEvents.windowScroll(), (_component, simulatedEvent) => {
          store.adder(simulatedEvent.event.raw.type)();
        }),
        AlloyEvents.run<EventArgs>(SystemEvents.windowResize(), (_component, simulatedEvent) => {
          store.adder(simulatedEvent.event.raw.type)();
        })
      ])
    })
  ), (doc, _body, gui, _component, store) => {
    cleanup.add(
      DomEvent.bind(SugarElement.fromDom(window), 'scroll', (evt) => {
        gui.broadcastEvent(SystemEvents.windowScroll(), evt);
      }).unbind
    );
    cleanup.add(
      DomEvent.bind(SugarElement.fromDom(window), 'resize', (evt) => {
        gui.broadcastEvent(SystemEvents.windowResize(), evt);
      }).unbind
    );
    return [
      GuiSetup.mAddStyles(doc, bodyMargin),
      store.sClear,
      Step.sync(() => {
        window.scrollTo(0, 100);
      }),
      Waiter.sTryUntil(
        'Checking for scrolling message',
        store.sAssertEq('Should have scrolled', [ 'scroll' ])
      ),
      store.sClear,
      Step.sync(() => {
        window.scrollTo(0, 0);
      }),
      Waiter.sTryUntil(
        'Checking for scrolling message (scrolling back to 0)',
        store.sAssertEq('Should have scrolled', [ 'scroll' ])
      ),
      store.sClear,
      Step.sync(() => {
        // Fake a window resize, by manually triggering a resize event
        window.dispatchEvent(new Event('resize'));
      }),
      Waiter.sTryUntil(
        'Checking for resize message',
        store.sAssertEq('Should have resized', [ 'resize' ])
      ),
      store.sClear,
      GuiSetup.mRemoveStyles
    ];
  }, cleanup.wrap(success), cleanup.wrap(failure));
});
