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import { MockBuilder, MockInstance, MockRender, ngMocks } from 'ng-mocks';
import { TestbedHarnessEnvironment } from '@angular/cdk/testing/testbed';
import { MatButtonToggleModule } from '@angular/material/button-toggle';
import { fakeAsync } from '@angular/core/testing';

import {
  MatButtonToggleGroupHarness,
  MatButtonToggleHarness,
} from '@angular/material/button-toggle/testing';

import { SharedModule } from 'src/app/shared/shared.module';
import { RDTIface } from '../system-caps.model';
import { RdtIfaceComponent } from './rdt-iface.component';

describe('Given RdtIfaceComponent', () => {
  beforeEach(() =>
    MockBuilder(RdtIfaceComponent)
      .mock(SharedModule)
      .keep(MatButtonToggleModule)
  );

  MockInstance.scope('case');

  describe('when initialized', () => {
    it('should display "RDT Interface selected" title', () => {
      const mockedRDT: RDTIface = {
        interface: 'msr',
        interface_supported: ['msr', 'os'],
      };

      MockRender(RdtIfaceComponent, {
        rdtIface: mockedRDT,
      });

      const expectValue = ngMocks.formatText(ngMocks.find('div'));

      expect(expectValue).toEqual('RDT Interface selected');
    });
  });

  describe('when initialized and ONE RDT interface is supported', () => {
    it('should disable toggle button', async () => {
      const mockedRDT: RDTIface = {
        interface: 'msr',
        interface_supported: ['msr'],
      };

      const fixture = MockRender(RdtIfaceComponent, {
        rdtIface: mockedRDT,
      });

      const loader = TestbedHarnessEnvironment.loader(fixture);
      const group = await loader.getHarness(MatButtonToggleGroupHarness);

      expect(await group.isDisabled()).toBe(true);
    });
  });

  describe('when initialized and Supported RDT interfaces', () => {
    it('should display a toggle group with correct options', async () => {
      const mockedRDT: RDTIface = {
        interface: 'msr',
        interface_supported: ['msr', 'os'],
      };

      const fixture = MockRender(RdtIfaceComponent, {
        rdtIface: mockedRDT,
      });

      const loader = TestbedHarnessEnvironment.loader(fixture);
      const group = await loader.getHarness(MatButtonToggleGroupHarness);
      const toggles = await group.getToggles();

      const lables = await Promise.all(
        toggles.map(
          async (toggle: MatButtonToggleHarness) => await toggle.getText()
        )
      );

      expect(lables).toEqual(['msr', 'os']);
    });
  });

  describe('when button toggle is clicked', () => {
    it('should emit "onChange" event with correct value', fakeAsync(async () => {
      const mockedRDT: RDTIface = {
        interface: 'msr',
        interface_supported: ['msr', 'os'],
      };

      const fixture = MockRender(RdtIfaceComponent, { rdtIface: mockedRDT });
      const component = fixture.point.componentInstance;

      const loader = TestbedHarnessEnvironment.loader(fixture);
      const group = await loader.getHarness(MatButtonToggleGroupHarness);
      const toggles = await group.getToggles();
      const osButton = toggles[1];

      component.changeEvent.subscribe((event) => {
        expect(event.value).toEqual('os');
      });

      await osButton.check();
    }));
  });
});
