/**
 * The List tab: a list property is a button saying how many items it has, clicking it opens the
 * tab, and there a row per item edits, adds and removes them with the inspector's own widgets.
 */
export async function listTab(t) {
  const { check, sleep, json, find, shot, click, clickText, press, typeText, mutate, undo } = t;

  /** `locate` throws when the text is absent, which is the wrong shape for "is it there?". */

  /**
   * A kind menu entry, always the *last* drawn one: a menu is drawn on top, and the kind names are
   * ordinary words ("Text") that the panels behind it may carry too – which is what made this click
   * land in the asset list once the whole suite ran and those panels had something in them.
   */
  const pickKind = async (label) => {
    const at = await json(`__gm.locate(${JSON.stringify(label)}, true)`);
    await click(at.x, at.y);
  };

  // A throwaway behavior carrying one list variable; removed again at the end of the step. Its
  // items are two digits so that no value can be confused with a row's index label.
  await mutate(`
    const p = __gm.state.project;
    p.assets.push({
      id: 'listy',
      type: 'behavior',
      name: 'Listy',
      props: { enabled: true, runInEditor: false, nums: [30, 11, 44] },
      variables: [{ key: 'nums', label: 'nums', kind: 'list', default: [] }],
      graph: { nodes: [], edges: [] },
    });
    __gm.state.select({ kind: 'asset', assetId: 'listy' });
  `);

  // 21a. The inspector shows the count, not a comma-separated line.
  const button = await find('3 items');
  check('a list property reads as its item count', button !== null, JSON.stringify(button));
  check('the editor is still on the scene tab', (await json('__gm.tab()')) === 'scene');
  await shot('01-count-button');

  await click(button.x, button.y);
  check('clicking it switches to the List tab', (await json('__gm.tab()')) === 'list');
  let info = await json('__gm.list.info()');
  check('which shows the list it was opened from', info.title === 'Listy · nums', JSON.stringify(info));
  check('with a row per item', JSON.stringify(info.items) === '["30","11","44"]', JSON.stringify(info.items));
  check('and the inspector is still beside it', (await find('VARIABLES')) !== null);
  await shot('02-list-tab');

  // 21b. A row edits its item, and it is one undo step.
  const second = await json('__gm.list.fieldAt(1)');
  await click(second.x, second.y);
  await typeText('42');
  await press('Enter');
  info = await json('__gm.list.info()');
  check('typing in a row writes that item', JSON.stringify(info.items) === '["30","42","44"]', info.items[1]);
  await undo();
  info = await json('__gm.list.info()');
  check('undo takes just that item back', JSON.stringify(info.items) === '["30","11","44"]', info.items[1]);

  // 21b-ii. An item edit does not rebuild the rows, so a delete clicked after it must build on the
  //     edited list – with the one the rows were built from, the edit came back undone (#235).
  const edited = await json('__gm.list.fieldAt(2)');
  await click(edited.x, edited.y);
  await typeText('66');
  await press('Enter');
  const removeFirst = await json('__gm.list.removeAt(0)');
  await click(removeFirst.x, removeFirst.y);
  await sleep(200);
  info = await json('__gm.list.info()');
  check(
    'deleting a row keeps an edit made to another row before',
    JSON.stringify(info.items) === '["11","66"]',
    JSON.stringify(info.items),
  );
  await undo();
  await undo();
  info = await json('__gm.list.info()');
  check(
    'and two undos take delete and edit back',
    JSON.stringify(info.items) === '["30","11","44"]',
    info.items,
  );

  // 21c. A short list opened after a long one. Its rows leave the content height pinned to the
  // viewport, so a layout skipped on "same size" would stack them all at the top.
  await mutate(`
    const a = __gm.state.project.assets.find((x) => x.id === 'listy');
    a.props.nums = Array.from({ length: 60 }, (_, i) => i);
    __gm.state.preview();
  `);
  const longRows = [await json('__gm.list.fieldAt(0)'), await json('__gm.list.fieldAt(1)')];
  check('a long list stacks its rows', longRows[0].y !== longRows[1].y, JSON.stringify(longRows));
  await mutate(`
    const a = __gm.state.project.assets.find((x) => x.id === 'listy');
    a.props.nums = [30, 11, 44];
    __gm.state.preview();
  `);
  const shortRows = [await json('__gm.list.fieldAt(0)'), await json('__gm.list.fieldAt(1)')];
  check(
    'and a short list after it still stacks its own',
    shortRows[0].y !== shortRows[1].y,
    JSON.stringify(shortRows),
  );

  // 21d. `+ Item` asks for a kind, since the list does not hold one for it.
  await clickText('+ Item');
  check(
    'a list of its own offers every kind, the struct included',
    (await json('__gm.list.info()')).offers.join(',') ===
      // In the order of the kind table (`core/properties/kinds.ts`) – a new kind is a row there,
      // and `animation` (#97) is the newest of them.
      'number,text,boolean,color,texture,statemachine,sound,scene,animation,struct',
    JSON.stringify((await json('__gm.list.info()')).offers),
  );
  await pickKind('Text');
  await sleep(200);
  info = await json('__gm.list.info()');
  check('+ Item appends one of the kind picked', info.items.length === 4, JSON.stringify(info.items));
  check(
    'and that row holds that kind',
    info.kinds.join(',') === 'number,number,number,text',
    info.kinds.join(','),
  );
  await undo();
  check('undo removes it again', (await json('__gm.list.info()')).items.length === 3);
  await shot('03-rows');

  // 21e. Back on the scene tab the button carries the current count.
  await mutate('__gm.state.openList(null)');
  check(
    'closing the list closes its tab',
    (await json('__gm.tab()')) !== 'list' && !(await json('__gm.documents()')).docs.includes('list'),
    JSON.stringify({ tab: await json('__gm.tab()'), docs: await json('__gm.documents()') }),
  );

  await mutate(`
    __gm.state.project.assets.find((a) => a.id === 'listy').props.nums = [1, 2];
    __gm.state.preview();
  `);
  check('and the count follows the value', (await find('2 items')) !== null);

  // 21f. A list declares nothing about its items, so the kind sits on the row: the mark in front of
  //     it is the picker, and picking changes that one item and no other.
  const numsOf = () => json(`__gm.state.project.assets.find((a) => a.id === 'listy')`);
  await mutate("__gm.state.openList({ kind: 'asset', assetId: 'listy', key: 'nums' })");
  let mark = await json('__gm.list.markAt(0)');
  await click(mark.x, mark.y);
  await pickKind('Text');
  await sleep(250);
  let listy = await numsOf();
  check(
    'the row mark changes that item alone',
    JSON.stringify(listy.props.nums) === '["1",2]',
    JSON.stringify(listy.props.nums),
  );
  check(
    'and the tab reads the two kinds off the values',
    (await json('__gm.list.info()')).kinds.join(',') === 'text,number',
    JSON.stringify((await json('__gm.list.info()')).kinds),
  );
  check('the variable itself says nothing about items', listy.variables[0].items === undefined);
  await undo();
  listy = await numsOf();
  check(
    'undo puts the item back as a number',
    JSON.stringify(listy.props.nums) === '[1,2]',
    JSON.stringify(listy.props.nums),
  );

  // 21g. A colour is the one kind a stored number cannot say for itself, so it is tagged.
  mark = await json('__gm.list.markAt(1)');
  await click(mark.x, mark.y);
  await pickKind('Color');
  await sleep(250);
  listy = await numsOf();
  check(
    'a colour item keeps its number under a tag',
    JSON.stringify(listy.props.nums) === '[1,{"$color":2}]',
    JSON.stringify(listy.props.nums),
  );
  check(
    'and is read back as a colour, its neighbour still a number',
    (await json('__gm.list.info()')).kinds.join(',') === 'number,color',
    JSON.stringify((await json('__gm.list.info()')).kinds),
  );
  await shot('03b-kinds');
  await undo();

  // 21h. The second tagged kind: a picture is an id, which stored on its own would be a plain text.
  //     The row carries the picker the `texture` property has, frames of a sheet included.
  // The pictures the earlier steps imported are set aside for this one: the menu lists every sheet
  // with all of its frames, and a long one would put the entry to click outside the drawn menu.
  await mutate(`
    const p = __gm.state.project;
    const isPicture = (a) => a.type === 'texture' || a.type === 'animation';
    __gm.__pictures = p.assets.filter(isPicture);
    p.assets = p.assets.filter((a) => !isPicture(a));
    p.assets.push({
      id: 'lt-sheet', type: 'texture', name: 'Sheet', props: { filter: 'nearest' },
      file: '', width: 32, height: 32,
      frames: [{ id: 'lt-f1', name: 'Frame 1', x: 0, y: 0, w: 16, h: 16 }],
    });
    __gm.state.preview();
  `);
  mark = await json('__gm.list.markAt(0)');
  await click(mark.x, mark.y);
  await pickKind('Texture');
  await sleep(250);
  // Switching kind carries the value along, here into an id that resolves to nothing – the same as
  // a number turning into the text "1". What matters is that it is tagged and no longer a number.
  check(
    'a texture item is tagged, so it is no plain text beside one',
    JSON.stringify((await numsOf()).props.nums) === '[{"$texture":"1"},2]',
    JSON.stringify((await numsOf()).props.nums),
  );
  const pic = await json('__gm.list.fieldAt(0)');
  await click(pic.x, pic.y);
  check('the row carries the picture picker, sheet frames and all', (await find('Sheet / Frame 1')) !== null);
  await pickKind('Sheet / Frame 1');
  await sleep(250);
  check(
    'and picking a frame of a sheet writes that id under the tag',
    JSON.stringify((await numsOf()).props.nums) === '[{"$texture":"lt-f1"},2]',
    JSON.stringify((await numsOf()).props.nums),
  );
  check(
    'which the tab reads back as a texture, its neighbour still a number',
    (await json('__gm.list.info()')).kinds.join(',') === 'texture,number',
    JSON.stringify((await json('__gm.list.info()')).kinds),
  );
  await shot('03c-texture');
  await undo();
  await undo();
  check(
    'undo puts the plain number back',
    JSON.stringify((await numsOf()).props.nums) === '[1,2]',
    JSON.stringify((await numsOf()).props.nums),
  );
  await mutate(`
    const p = __gm.state.project;
    p.assets = [...p.assets.filter((a) => a.id !== 'lt-sheet'), ...__gm.__pictures];
    delete __gm.__pictures;
    __gm.state.preview();
  `);

  await mutate('__gm.state.openList(null)');
  // The mark of a list is plain now, and still may not push the value off the inspector's grid.
  const lefts = await json(
    `[__gm.inspectorField('Name')?.left ?? null, __gm.inspectorField('nums')?.left ?? null]`,
  );
  check(
    'the list mark keeps its row on the column every row shares',
    lefts[0] !== null && lefts[0] === lefts[1],
    JSON.stringify(lefts),
  );

  // 21i. A list whose target is gone empties the tab rather than showing a stale one.
  await mutate("__gm.state.openList({ kind: 'asset', assetId: 'listy', key: 'nums' })");
  check('a list can be opened from outside the inspector too', (await json('__gm.tab()')) === 'list');
  await mutate(`
    const p = __gm.state.project;
    p.assets = p.assets.filter((a) => a.id !== 'listy');
    __gm.state.select(null);
    __gm.state.preview();
  `);
  info = await json('__gm.list.info()');
  check('a deleted target empties the tab', info.title === '' && info.items.length === 0, info.title);
  await shot('04-empty');

  // 21j. A list whose items are structs: each row is the bundle's fields under each other, built by
  //    the inspector's own struct renderer. Values are two digits so no row's index can match one.
  await mutate(`
    const p = __gm.state.project;
    p.assets.push({
      id: 'celly',
      type: 'behavior',
      name: 'Celly',
      props: { enabled: true, runInEditor: false, cells: [{ x: 30, y: 11 }, { x: 44, y: 55 }] },
      variables: [{ key: 'cells', label: 'cells', kind: 'list', default: [] }],
      graph: { nodes: [], edges: [] },
    });
    __gm.state.select({ kind: 'asset', assetId: 'celly' });
    __gm.state.openList({ kind: 'asset', assetId: 'celly', key: 'cells' });
  `);
  info = await json('__gm.list.info()');
  check('a list of structs opens with a row per bundle', info.items.length === 2, JSON.stringify(info));
  check(
    'and a row reads as its fields, not as an object',
    info.items[0] === 'x: 30, y: 11',
    JSON.stringify(info.items),
  );
  check(
    'the tab reads both items as structs',
    info.kinds.join(',') === 'struct,struct',
    info.kinds.join(','),
  );
  check('the field labels of a bundle are on screen', (await find('x')) !== null);
  await shot('05-struct-rows');

  // Editing one field must leave the others and the neighbouring item alone – the whole item is
  // rewritten on every keystroke, so a snapshot anywhere would silently revive an old value.
  const firstField = await json("__gm.list.fieldAt(0, 'x')");
  await click(firstField.x, firstField.y);
  await typeText('77');
  await press('Enter');
  const cells = await json(`__gm.state.project.assets.find((a) => a.id === 'celly').props.cells`);
  check(
    'editing one field of one item leaves every other value untouched',
    JSON.stringify(cells) ===
      JSON.stringify([
        { x: 77, y: 11 },
        { x: 44, y: 55 },
      ]),
    JSON.stringify(cells),
  );
  await undo();
  const back = await json(`__gm.state.project.assets.find((a) => a.id === 'celly').props.cells`);
  check(
    'and undo takes back just that field',
    JSON.stringify(back) ===
      JSON.stringify([
        { x: 30, y: 11 },
        { x: 44, y: 55 },
      ]),
    JSON.stringify(back),
  );

  // 21k. A struct item carries its own shape, so it is named, typed and grown on its own row – and
  //     primitives only, because a list inside a list item is the one shape the model does not store.
  const cellsOf = () => json(`__gm.state.project.assets.find((a) => a.id === 'celly').props.cells`);
  check('a struct item carries the add-a-field control', (await find('+ Field')) !== null);
  await clickText('+ Field');
  await pickKind('Boolean');
  await sleep(250);
  check(
    '+ Field grows the one item it belongs to, not every item',
    JSON.stringify(await cellsOf()) ===
      JSON.stringify([
        { x: 30, y: 11, field1: false },
        { x: 44, y: 55 },
      ]),
    JSON.stringify(await cellsOf()),
  );
  info = await json('__gm.list.info()');
  check(
    'and the tab shows the new field on that row',
    info.items[0] === 'x: 30, y: 11, field1: false',
    info.items[0],
  );
  // Asked in the page: `undefined` comes back over the wire as `null`.
  check(
    'the inspector has no item shape to show any more',
    await json(`__gm.state.project.assets.find((a) => a.id === 'celly').variables[0].fields === undefined`),
  );
  await shot('06-item-field');

  // A field of a struct item is renamed and retyped where it sits, both being plain value edits.
  const nameBox = await json("__gm.list.nameAt(0, 'y')");
  await click(nameBox.x, nameBox.y);
  await press('a', { ctrl: true });
  await typeText('row');
  await press('Enter');
  check(
    'renaming a field of one item leaves the other item alone',
    JSON.stringify(await cellsOf()) ===
      JSON.stringify([
        { x: 30, row: 11, field1: false },
        { x: 44, y: 55 },
      ]),
    JSON.stringify(await cellsOf()),
  );
  const fieldMark = await json("__gm.list.markAt(0, 'x')");
  await click(fieldMark.x, fieldMark.y);
  await pickKind('Color');
  await sleep(250);
  check(
    'and a field of a struct item can be a colour too, tagged like any item',
    JSON.stringify((await cellsOf())[0]) === JSON.stringify({ x: { $color: 30 }, row: 11, field1: false }),
    JSON.stringify((await cellsOf())[0]),
  );
  await undo();
  await undo();
  await undo();
  check(
    'and three undos take the shape back to what it was',
    JSON.stringify(await cellsOf()) ===
      JSON.stringify([
        { x: 30, y: 11 },
        { x: 44, y: 55 },
      ]),
    JSON.stringify(await cellsOf()),
  );

  // 21l. A node's unconnected `list` input lives in the same params bag as a setting, so it is a count
  //    button too.
  await mutate(`
    const a = __gm.state.project.assets.find((x) => x.id === 'celly');
    a.graph.nodes.push({ id: 'counter', type: 'Count', x: 40, y: 40, params: {} });
    __gm.showTab('graph');
    __gm.state.select({ kind: 'node', assetId: 'celly', nodeId: 'counter', nodeIds: ['counter'] });
    __gm.state.preview();
  `);
  const portButton = await find('0 items');
  check('an unconnected list input reads as an item count', portButton !== null);
  await click(portButton.x, portButton.y);
  check('clicking it opens the List tab on the port', (await json('__gm.tab()')) === 'list');
  info = await json('__gm.list.info()');
  check('titled by the node and the port it belongs to', info.title === 'Count · list', info.title);
  await clickText('+ Item');
  await pickKind('Number');
  await sleep(250);
  const params = await json(`__gm.state.project.assets.find((a) => a.id === 'celly').graph.nodes[0].params`);
  check(
    'and the item lands in the node params, where the node reads it',
    JSON.stringify(params) === '{"list":[0]}',
    JSON.stringify(params),
  );

  await mutate(`
    const p = __gm.state.project;
    p.assets = p.assets.filter((a) => a.id !== 'celly');
    __gm.state.select(null);
    __gm.showTab('scene');
    __gm.state.preview();
  `);

  await mutate('__gm.state.openList(null)');
  const left = await json(
    '__gm.state.project.assets.filter((a) => a.id === "listy" || a.id === "celly").length',
  );
  check('the step leaves the fixture as it found it', left === 0, String(left));
}