/**
 * The empty host the Inspector, the Variables tab and the Tilemap panel build their rows into: what
 * each panel hands in reaches the rows, and folding a group lays the scroll out anew.
 */
import { describe, expect, it, vi } from 'vitest';
import { createEmptyProject } from '../../src/core/model/Project';
import { emptyHost } from '../../src/editor/inspector/host';
import { EditorState } from '../../src/editor/state';
import type { ScrollContainer } from '../../src/ui';

function setup() {
  const state = new EditorState();
  state.loadProject(createEmptyProject('p', 'P'), 1);
  const scroll = { relayoutContent: vi.fn() };
  return { state, scroll, asScroll: scroll as unknown as ScrollContainer };
}

describe('an empty inspector host', () => {
  it('carries what the panel hands in, and nothing live without it', () => {
    const { state, asScroll } = setup();
    const live = { hp: 3 };
    const follow = vi.fn();
    const host = emptyHost(state, asScroll, {
      foldScope: 'variables',
      listLimit: 7,
      liveVariables: () => live,
      followReference: follow,
    });
    expect(host.foldScope).toBe('variables');
    expect(host.listLimit).toBe(7);
    expect(host.liveVariables('any')).toBe(live);
    expect(host.followReference).toBe(follow);

    const plain = emptyHost(state, asScroll);
    expect(plain.foldScope).toBeUndefined();
    expect(plain.liveVariables('any')).toBeNull();
    host.body.destroy({ children: true });
    plain.body.destroy({ children: true });
  });

  it('reads the project through the state, which a load replaces', () => {
    const { state, asScroll } = setup();
    const host = emptyHost(state, asScroll);
    state.loadProject(createEmptyProject('q', 'Q'), 1);
    expect(host.project().id).toBe('q');
    host.body.destroy({ children: true });
  });

  it('lays the scroll out anew when a group folds', () => {
    const { state, scroll, asScroll } = setup();
    const host = emptyHost(state, asScroll);
    (host.body as unknown as { onFold: () => void }).onFold();
    expect(scroll.relayoutContent).toHaveBeenCalledTimes(1);
    host.body.destroy({ children: true });
  });
});