import { same } from '../lib/harness.mjs';

/**
 * Hierarchy folding. A freshly opened scene is fully collapsed, so only its top-level objects
 * are listed (o4/oc1 hang under o1, oc2 under o2). The chevron folds a row open and shut
 * without touching the selection, and selecting a nested object unfolds the way down to it.
 */
export async function hierarchy(t) {
  const { check, evaluate, json, click, doubleClick, select, state, shot } = t;
  const rowIds = () => json('__gm.hierarchyOrder()');
  const rows = async () => JSON.stringify(await rowIds());
  const selectionBefore = (await state()).selection;

  check(
    'hierarchy starts collapsed – only top-level objects are listed',
    same(await rowIds(), ['o1', 'o2', 'o3', 'o5']),
    await rows(),
  );
  check('a leaf row offers no chevron', (await evaluate(`__gm.hierarchyChevron('o3')`)) === null);
  const chevron = await json(`__gm.hierarchyChevron('o2')`);
  await click(chevron.x, chevron.y);
  check(
    'clicking the chevron unfolds the row, leaving the selection alone',
    same(await rowIds(), ['o1', 'o2', 'oc2', 'o3', 'o5']) && same((await state()).selection, selectionBefore),
    await rows(),
  );
  await shot('01a-hierarchy-unfolded');
  await click(chevron.x, chevron.y);
  check(
    'clicking it again folds the subtree away',
    same(await rowIds(), ['o1', 'o2', 'o3', 'o5']),
    await rows(),
  );
  // The row itself folds on a double-click, the same as its chevron. Pixi leaves `detail` at 0 on
  // a press, so this needs a real double-click from the harness, not two `click()` calls.
  const row = await json(`__gm.hierarchyRow('o2')`);
  await doubleClick(row.x, row.y);
  check(
    'double-clicking the row unfolds it as well',
    same(await rowIds(), ['o1', 'o2', 'oc2', 'o3', 'o5']),
    await rows(),
  );
  await doubleClick(row.x, row.y);
  check(
    'double-clicking it again folds the subtree away',
    same(await rowIds(), ['o1', 'o2', 'o3', 'o5']),
    await rows(),
  );

  await select({ kind: 'object', holderId: 'scene1', objectId: 'oc1' });
  check(
    'selecting a nested object unfolds its ancestors',
    same(await rowIds(), ['o1', 'o4', 'oc1', 'o2', 'o3', 'o5']),
    await rows(),
  );
  await evaluate('__gm.state.select(null); __gm.hierarchyCollapseAll()');
  check('Collapse all folds everything back', same(await rowIds(), ['o1', 'o2', 'o3', 'o5']), await rows());
}