import { defineComponent, h, readonly, shallowRef } from 'vue';
import { mount } from '@vue/test-utils';
import { describe, expect, it, vi } from 'vitest';
import { resolveChapterIntent } from '@/audio/journey-music-state';
import {
  useAudioIntent,
  type AudioIntentBinding,
} from '@/composables/useAudioIntent';
import type { JourneySectionsBinding } from '@/composables/useJourneySections';
import type { SectionId } from '@/content/types';
import type { NavigationState } from '@/journey/navigation-controller';
import type { JourneySnapshot } from '@/journey/types';

const sectionIds = [
  'start', 'profile', 'experience', 'infrastructure',
  'selected-builds', 'additional-work', 'toolkit', 'contact',
] as const satisfies readonly SectionId[];

describe('useAudioIntent', () => {
  it('seeds the first measured deep-link section before audio activation', () => {
    const snapshot = shallowRef<JourneySnapshot>({
      scrollY: 7_200,
      routeProgress: 1,
      direction: 0,
      acceleration: 0,
      driveSpeed: 0.18,
      activeSectionId: 'contact',
      chapter: 'destination',
      sign: null,
      arrived: true,
      sectionActivation: {
        layoutRevision: 4,
        activeHeadingOffsetVh: -0.2,
        nextHeadingOffsetVh: null,
      },
    });
    const navigation = shallowRef<NavigationState>({
      epoch: 1,
      source: 'initial',
      phase: 'settled',
      destinationId: 'contact',
      signDestinationId: null,
    });
    let frame: ((now: number, value: JourneySnapshot) => boolean) | null = null;
    const journey: JourneySectionsBinding = {
      snapshot: readonly(snapshot),
      requestFrame: vi.fn(),
      subscribeFrame(listener) {
        frame = listener;
        return () => { frame = null; };
      },
    };
    let binding: AudioIntentBinding | null = null;
    const wrapper = mount(defineComponent({
      setup() {
        binding = useAudioIntent({ canonicalIds: sectionIds, journey, navigation });
        return () => h('div');
      },
    }));

    expect(frame).not.toBeNull();
    frame!(16, snapshot.value);
    expect(binding!.chapter.value).toEqual(resolveChapterIntent('contact'));
    wrapper.unmount();
  });
});