import { mount, flushPromises } from '@vue/test-utils';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { nextTick } from 'vue';
import SceneCanvas from '@/components/SceneCanvas.vue';
import DriveControls from '@/components/DriveControls.vue';
import JourneyHud from '@/components/JourneyHud.vue';
import type { AudioUiState } from '@/audio/types';
import type { MotionPolicy, QualityTier } from '@/journey/motion-policy';
import type { JourneySnapshot } from '@/journey/types';

const sceneMocks = vi.hoisted(() => ({
  build: vi.fn(async () => ({ render: vi.fn(), dispose: vi.fn() })),
}));

vi.mock('@/scene/world/environment', () => ({
  createProceduralSceneGeneration: sceneMocks.build,
}));

const journey = (overrides: Partial<JourneySnapshot> = {}): JourneySnapshot => ({
  scrollY: 0,
  routeProgress: 0.42,
  direction: 1,
  acceleration: 0.3,
  driveSpeed: 0.6,
  activeSectionId: 'infrastructure',
  chapter: 'infrastructure',
  sign: null,
  arrived: false,
  ...overrides,
});

const policy = (overrides: Partial<MotionPolicy> = {}): MotionPolicy => ({
  allowSceneRequest: true,
  allowAutomaticVideo: true,
  maximumTier: 'high',
  reason: 'full',
  ...overrides,
});

describe('SceneCanvas', () => {
  beforeEach(() => sceneMocks.build.mockClear());
  afterEach(() => {
    vi.restoreAllMocks();
    vi.unstubAllGlobals();
  });

  it.each([
    ['reduced motion', policy({ allowSceneRequest: false, maximumTier: 'static', reason: 'system-reduce' })],
    ['saved Static mode', policy({ allowSceneRequest: false, maximumTier: 'static', reason: 'saved-static' })],
  ])('does not request or render the scene for %s', async (_name, blockedPolicy) => {
    const wrapper = mount(SceneCanvas, {
      props: {
        journey: journey(),
        policy: blockedPolicy,
        quality: 'static',
        sceneDescription: 'A decorative night road behind the portfolio content.',
      },
    });

    await flushPromises();

    expect(sceneMocks.build).not.toHaveBeenCalled();
    expect(wrapper.findAll('canvas')).toHaveLength(0);
    expect(wrapper.get('img').attributes()).toMatchObject({ alt: '', width: '1600', height: '900' });
    expect(wrapper.findAll('.journey-poster-composition > span')).toHaveLength(7);
    expect(wrapper.find('.journey-poster__sun').exists()).toBe(true);
    expect(wrapper.find('.journey-poster__road').exists()).toBe(true);
    expect(wrapper.find('.journey-poster__car').exists()).toBe(true);
    expect(wrapper.text()).toContain('A decorative night road behind the portfolio content.');
    wrapper.unmount();
  });

  it('owns exactly one decorative canvas when full motion is allowed', async () => {
    const wrapper = mount(SceneCanvas, {
      props: {
        journey: journey(),
        policy: policy(),
        quality: 'high',
        sceneDescription: 'A decorative night road behind the portfolio content.',
      },
    });

    await flushPromises();

    expect(sceneMocks.build).toHaveBeenCalledTimes(1);
    expect(wrapper.findAll('canvas')).toHaveLength(1);
    expect(wrapper.get('canvas').attributes('aria-hidden')).toBe('true');
    expect(wrapper.get('.journey-world').attributes('aria-hidden')).toBe('true');
    wrapper.unmount();
  });

  it('forwards each complete scene frame interval to adaptive quality', async () => {
    const callbacks = new Map<number, FrameRequestCallback>();
    let nextFrameId = 1;
    vi.stubGlobal('requestAnimationFrame', vi.fn((callback: FrameRequestCallback) => {
      const id = nextFrameId++;
      callbacks.set(id, callback);
      return id;
    }));
    vi.stubGlobal('cancelAnimationFrame', vi.fn((id: number) => callbacks.delete(id)));
    const sampleFrame = vi.fn();
    const wrapper = mount(SceneCanvas, {
      props: {
        journey: journey(),
        policy: policy(),
        quality: 'high',
        sceneDescription: 'A decorative night road behind the portfolio content.',
        sampleFrame,
      },
    });
    await flushPromises();
    const frame = [...callbacks.entries()][0]!;
    callbacks.delete(frame[0]);
    vi.spyOn(performance, 'now').mockReturnValueOnce(2_000).mockReturnValueOnce(2_301);

    frame[1](2_000);

    expect(sampleFrame).toHaveBeenCalledWith(2_000, 2_301);
    wrapper.unmount();
  });

  it('falls back to the poster without obscuring semantic content after scene failure', async () => {
    sceneMocks.build.mockRejectedValueOnce(new Error('WebGL unavailable'));
    const wrapper = mount(SceneCanvas, {
      props: {
        journey: journey(),
        policy: policy(),
        quality: 'medium',
        sceneDescription: 'A decorative night road behind the portfolio content.',
      },
      slots: { default: '<main><h1>Semantic portfolio</h1></main>' },
    });

    await flushPromises();

    expect(wrapper.get('img').isVisible()).toBe(true);
    expect(wrapper.findAll('canvas')).toHaveLength(0);
    expect(wrapper.text()).toContain('Semantic portfolio');
    wrapper.unmount();
  });

  it('aborts and removes the canvas on a Static transition', async () => {
    const wrapper = mount(SceneCanvas, {
      props: {
        journey: journey(),
        policy: policy(),
        quality: 'high',
        sceneDescription: 'A decorative night road behind the portfolio content.',
      },
    });
    await flushPromises();
    expect(wrapper.findAll('canvas')).toHaveLength(1);

    await wrapper.setProps({
      policy: policy({ allowSceneRequest: false, maximumTier: 'static', reason: 'saved-static' }),
      quality: 'static',
    });
    await nextTick();

    expect(wrapper.findAll('canvas')).toHaveLength(0);
    expect(wrapper.get('img').isVisible()).toBe(true);
    wrapper.unmount();
  });

  it('retains the same canvas and scene generation for a visitor pause and resume', async () => {
    const wrapper = mount(SceneCanvas, {
      props: {
        journey: journey(),
        policy: policy(),
        quality: 'high',
        sceneDescription: 'A decorative night road behind the portfolio content.',
      },
    });
    await flushPromises();
    const canvas = wrapper.get('canvas').element;
    const runtime = await sceneMocks.build.mock.results[0]!.value;

    await wrapper.setProps({
      policy: policy({ allowSceneRequest: false, maximumTier: 'static', reason: 'visitor-pause' }),
      quality: 'high',
    });
    await flushPromises();

    expect(wrapper.get('canvas').element).toBe(canvas);
    expect(runtime.dispose).not.toHaveBeenCalled();
    expect(sceneMocks.build).toHaveBeenCalledTimes(1);

    await wrapper.setProps({ policy: policy() });
    await flushPromises();

    expect(wrapper.get('canvas').element).toBe(canvas);
    expect(runtime.dispose).not.toHaveBeenCalled();
    expect(sceneMocks.build).toHaveBeenCalledTimes(1);
    wrapper.unmount();
  });
});

describe('DriveControls', () => {
  const mountControls = (
    motionPolicy: MotionPolicy,
    maximum: QualityTier = 'high',
    audioState: AudioUiState = { kind: 'idle' },
  ) => mount(DriveControls, {
    attachTo: document.body,
    props: { policy: motionPolicy, maximumQuality: maximum, sceneStatus: 'running', audioState },
  });

  it('presents one explicit drive action before audio activation', async () => {
    const wrapper = mountControls(policy());

    expect(wrapper.get('[data-drive-state="idle"]').text()).toContain('START THE DRIVE');
    expect(wrapper.find('[aria-label="Mute sound"]').exists()).toBe(false);
    await wrapper.get('[aria-label="Start the drive"]').trigger('click');
    expect(wrapper.emitted('audioStart')).toHaveLength(1);
    wrapper.unmount();
  });

  it('collapses the running state to named vehicle controls and an upward settings panel', async () => {
    const wrapper = mountControls(policy(), 'high', { kind: 'running', muted: false, volume: 0.4 });

    expect(wrapper.get('[aria-label="Mute sound"]')).toBeTruthy();
    expect(wrapper.get('[aria-label="Sound volume"]')).toBeTruthy();
    expect(wrapper.get('[aria-label="Pause motion"]')).toBeTruthy();
    const settings = wrapper.get('[aria-label="Drive settings"]');
    await settings.trigger('click');

    const panel = wrapper.get('[role="dialog"][aria-label="Drive settings"]');
    expect(panel.text()).not.toContain('Motion: active');
    expect(panel.find('[role="status"]').exists()).toBe(false);
    expect(panel.get('select').attributes('aria-label')).toBe('Quality control');
    expect(settings.attributes('aria-expanded')).toBe('true');
    wrapper.unmount();
  });

  it('dismisses settings with Escape and outside interaction', async () => {
    const wrapper = mountControls(policy(), 'high', { kind: 'running', muted: false, volume: 0.4 });
    const settings = wrapper.get('[aria-label="Drive settings"]');
    await settings.trigger('click');
    document.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }));
    await nextTick();
    expect(wrapper.find('[role="dialog"][aria-label="Drive settings"]').exists()).toBe(false);
    expect(document.activeElement).toBe(settings.element);

    await settings.trigger('click');
    document.body.dispatchEvent(new MouseEvent('pointerdown', { bubbles: true }));
    await nextTick();
    expect(wrapper.find('[role="dialog"][aria-label="Drive settings"]').exists()).toBe(false);
    wrapper.unmount();
  });

  it.each([
    ['visitor-pause', 'Resume motion'],
    ['saved-static', 'Enable motion'],
  ] as const)('offers the correct recovery action for %s', (reason, label) => {
    const wrapper = mountControls(
      policy({ allowSceneRequest: false, maximumTier: 'static', reason }),
      'static',
      { kind: 'running', muted: false, volume: 0.4 },
    );
    expect(wrapper.get(`[aria-label="${label}"]`)).toBeTruthy();
    wrapper.unmount();
  });
});

describe('JourneyHud', () => {
  it('renders only route percent, current section, and arrival from one snapshot', () => {
    const wrapper = mount(JourneyHud, {
      props: {
        journey: journey({ routeProgress: 1, activeSectionId: 'contact', arrived: true }),
        sectionLabel: 'Contact',
      },
    });

    expect(wrapper.text()).toContain('100%');
    expect(wrapper.text()).toContain('Contact');
    expect(wrapper.text()).toContain('ARRIVED');
    expect(wrapper.text()).not.toContain('Low');
    expect(wrapper.attributes('aria-hidden')).toBe('true');
  });
});