import { colourDistance } from '../lib/harness.mjs';
import { inView } from './lib/scaffold.mjs';

/** One per entry of `ASSET_TYPES` – a new asset type counts here too. */
const ASSET_TYPE_COUNT = 29;

/** The asset panel: placing by dragging into the view, creating through "+", and resetting an asset value. */
export async function assets(t) {
  const {
    check,
    sleep,
    evaluate,
    json,
    shot,
    click,
    doubleClick,
    clickText,
    mouse,
    mutate,
    press,
    redo,
    undo,
    select,
    objects,
    asset,
    showTab,
    has,
  } = t;

  // 4a. Context menu on the Crate asset. Placing left the menu when it became a drag. The groups
  //     start folded (#176) – the hook unfolds Crate's.
  await json("__gm.assetRow('crate')");
  await clickText('Crate', 'right');
  check('asset context menu opens', Boolean(await evaluate(`__gm.locate('Delete…')`)));
  check('placing is no longer a menu item', !(await evaluate(`__gm.locate('Place in scene')`)));
  await shot('11-context-menu');
  await clickText('Duplicate');
  const copy = await json(`(() => {
    const assets = __gm.state.project.assets;
    const c = assets[assets.findIndex((a) => a.id === 'crate') + 1];
    const s = __gm.state.selection;
    return c ? { name: c.name, type: c.type, open: s?.kind === 'asset' && s.assetId === c.id } : null;
  })()`);
  check(
    'Duplicate puts "Crate 2" right behind the Crate and opens it',
    copy?.name === 'Crate 2' && copy.type === 'sprite' && copy.open,
    JSON.stringify(copy),
  );
  await undo();
  check(
    'one undo takes the copy back out',
    !(await json("__gm.state.project.assets.some((a) => a.name === 'Crate 2')")),
  );
  await showTab('scene');

  await addMenuOnRightClick(t);

  // 4b. Drag the Crate asset from the panel into the scene view. Driven step by step rather than
  //     with `drag()`, because the preview only exists while the button is still down.
  const from = await json("__gm.assetRow('crate')");
  const centre = await json('__gm.viewportCenter()');
  const to = { x: centre.x + 70, y: centre.y - 50 };
  await mouse('mouseMoved', from.x, from.y);
  await mouse('mousePressed', from.x, from.y);
  for (let i = 1; i <= 8; i++) {
    const x = from.x + ((to.x - from.x) * i) / 8;
    const y = from.y + ((to.y - from.y) * i) / 8;
    await mouse('mouseMoved', x, y, 'left', { buttons: 1 });
    await sleep(16);
  }
  const preview = await json('__gm.dropPreview()');
  check(
    'dragging an asset over the view previews where it would land',
    Boolean(preview) && preview.assetId === 'crate' && preview.rejection === '',
    JSON.stringify(preview),
  );
  await shot('11b-drop-preview');
  await mouse('mouseReleased', to.x, to.y);
  await sleep(200);

  const count = (await objects()).length;
  check('dropping the asset adds an object', count === 8, `objects=${count}`);
  const placed = await json(
    '(() => { const id = __gm.state.selectedObjectIds[0]; return __gm.sceneObjects().find(o => o.id === id) ?? null; })()',
  );
  // The preview is a promise: whatever it drew has to be where the object then sits, or the
  // outline was decoration rather than a prediction.
  check(
    'the object lands where the preview promised, and is selected',
    Boolean(placed) &&
      placed.assetId === 'crate' &&
      placed.position.x === preview.x &&
      placed.position.y === preview.y,
    JSON.stringify({ placed: placed && placed.position, preview }),
  );
  check('the preview is gone once the asset is placed', (await json('__gm.dropPreview()')) === null);
  await undo();
  const afterUndo = (await objects()).length;
  check('one undo takes the dropped object back out', afterUndo === 7, `objects=${afterUndo}`);
  await redo();
  check('redo puts it back', (await objects()).length === 8);

  // 4c. Create a new asset through the + menu. The menu is two alphabetical groups (#43) – what
  //     can be placed in a scene, a line, then what only lives in the library. Its types do not
  //     all fit under the button on a canvas 800 high: there it scrolls.
  await clickText('+');
  const rows = await json('__gm.menuRows()');
  const cut = rows.indexOf(null);
  const placeable = rows.slice(0, cut);
  const library = rows.slice(cut + 1);
  check(
    'the + menu is split by exactly one line',
    rows.filter((r) => r === null).length === 1 && cut > 0,
    JSON.stringify(rows),
  );
  check(
    'every asset type is offered once, each group sorted by label',
    placeable.length + library.length === ASSET_TYPE_COUNT &&
      String(placeable) === String([...placeable].sort()) &&
      String(library) === String([...library].sort()),
    JSON.stringify({ placeable, library }),
  );
  check(
    'placeable types come first, the library ones after the line',
    placeable.includes('Sprite') &&
      !placeable.includes('Scene') &&
      library.includes('Scene') &&
      library.includes('Texture'),
    JSON.stringify({ placeable, library }),
  );
  // The height cap is the canvas, not a constant: fifteen entries used to run under the mask edge,
  // where `locate` still finds them but a click lands on nothing (that is what took step 30 down).
  // What does not fit is scrolled to, never drawn past the box.
  await shot('tmp-plus-menu');
  const menuBox = await json('__gm.overlayRect()');
  const lastRow = await inView(
    t,
    '__gm.overlayRect()',
    `__gm.locate(${JSON.stringify(library.at(-1))}, true)`,
  );
  const screenH = await json('__gm.app.screen.height');
  check(
    'the whole menu stands on screen, last entry reached by scrolling at most',
    Boolean(lastRow) &&
      lastRow.y < menuBox.y + menuBox.h &&
      menuBox.y + menuBox.h <= screenH &&
      menuBox.y >= 0,
    JSON.stringify({ menuBox, lastRow, screenH }),
  );
  // A tenth of the canvas stays free below every popup. The margin used to live only in the height
  // cap, never in the placement, so a popup that had to be shifted up ended flush on the bottom
  // edge with the whole gap collected above it. Above it is a budget, not a distance: this menu
  // hangs off a button near the top and stays there.
  const above = menuBox.y;
  const below = screenH - (menuBox.y + menuBox.h);
  const margin = Math.round(screenH * 0.1);
  check(
    'the menu keeps a tenth of the canvas free below, and stays under its button',
    below >= margin - 1 && above >= 0 && above < margin,
    JSON.stringify({ above, below, margin, screenH }),
  );
  await clickText('Sprite');
  const names = await json('__gm.state.project.assets.map(a => a.name)');
  check('+ menu creates a sprite asset', names.includes('Sprite'), JSON.stringify(names));
  await shot('12-new-asset');

  // 4d. Double-click on a scene row: the one thing activating an asset still does since placing
  //     became a drag. The second scene goes in through the model – the "+" menu's "Scene" entry
  //     shares its label with the Scene tab, so a click by text could land on either.
  await mutate(
    `__gm.state.project.assets.push({ id: 'scene2', type: 'scene', name: 'Level 2', props: { backgroundColor: 0x22252c }, objects: [] })`,
  );
  const secondScene = await json("__gm.assetRow('scene2')");
  await evaluate('__gm.lookAt(5000, 5000)');
  const pannedAway = await json(`__gm.objectRect('o1')`);
  await showTab('graph');
  await doubleClick(secondScene.x, secondScene.y);
  check(
    'double-clicking a scene asset makes it the active scene',
    (await json('__gm.state.project.activeSceneId')) === 'scene2',
    await json('__gm.state.project.activeSceneId'),
  );
  check('and opens the Scene tab', (await json('__gm.tab()')) === 'scene', await json('__gm.tab()'));
  const firstScene = await json("__gm.assetRow('scene1')");
  await doubleClick(firstScene.x, firstScene.y);
  check(
    'double-clicking the first one switches back',
    (await json('__gm.state.project.activeSceneId')) === 'scene1',
    await json('__gm.state.project.activeSceneId'),
  );
  // An opened scene comes up framed, as if Fit had been clicked (#295) – not where the view stood.
  const opened = await json(`__gm.objectRect('o1')`);
  const fitAt = await json(`__gm.sceneHeaderAt('fit')`);
  await click(fitAt.x, fitAt.y);
  const fitted = await json(`__gm.objectRect('o1')`);
  const sameRect = (a, b) =>
    Boolean(a && b) && ['x', 'y', 'w', 'h'].every((k) => Math.abs(a[k] - b[k]) < 0.01);
  check(
    'a scene that is opened comes up framed like after a click on Fit',
    sameRect(opened, fitted) && !sameRect(opened, pannedAway),
    JSON.stringify({ pannedAway, opened, fitted }),
  );
  await mutate(`__gm.state.project.assets = __gm.state.project.assets.filter((a) => a.id !== 'scene2')`);

  // 4d′. Opening an asset: a click on its row only selects, a double-click opens the tab it
  //      lives in – every type that has one. The fixture lacks five of them; they go in through
  //      the model, empty.
  await mutate(`__gm.state.project.assets.push(
    { id: 'sm-open', type: 'statemachine', name: 'Machine', props: {}, graph: { nodes: [], edges: [] } },
    { id: 'tex-open', type: 'texture', name: 'Sheet', props: {}, file: '', width: 0, height: 0, frames: [] },
    { id: 'anim-open', type: 'animation', name: 'Walk', props: {}, root: '', tracks: [] },
    { id: 'box-open', type: 'container', name: 'Box', props: {}, objects: [] },
    { id: 'at-open', type: 'tile', name: 'Grass', props: {}, pictures: [] },
  )`);
  const openable = [
    ['mover', 'graph', '__gm.graph.current()'],
    ['sm-open', 'statemachine', '__gm.stateMachine.current()'],
    ['adjust-colors', 'shader', '__gm.shader.current()'],
    ['tex-open', 'texture', '__gm.texture.current()'],
    ['anim-open', 'animation', '__gm.animation.current()'],
    ['box-open', 'container', '__gm.container.current()'],
    ['at-open', 'tile', '__gm.tile.current()'],
  ];
  for (const [id, tab, shown] of openable) {
    await showTab('scene');
    const row = await json(`__gm.assetRow(${JSON.stringify(id)})`);
    await click(row.x, row.y);
    await sleep(500); // past the double-click window, so the next press starts a fresh pair
    const clicked = {
      tab: await json('__gm.tab()'),
      selected: (await json('__gm.state.selection'))?.assetId,
    };
    check(
      `a click on the ${tab} asset selects it and leaves the Scene tab alone`,
      clicked.tab === 'scene' && clicked.selected === id,
      JSON.stringify(clicked),
    );
    await doubleClick(row.x, row.y);
    const opened = { tab: await json('__gm.tab()'), shown: await json(shown) };
    check(
      `a double-click opens the ${tab} tab on it`,
      opened.tab === tab && opened.shown === id,
      JSON.stringify(opened),
    );
  }
  // Enter goes the same way (`onActivate`), but only once the list holds keyboard focus, which a
  // click does not give it – so it is not driven here.
  await showTab('scene');
  await clickText('+');
  const entry = await evaluate(`__gm.locate('Behavior', true)`);
  await click(entry.x, entry.y);
  const created = await json(
    "(__gm.state.project.assets.find((a) => a.type === 'behavior' && !['mover', 'spawner'].includes(a.id)) ?? {}).id ?? ''",
  );
  const fresh = { created, tab: await json('__gm.tab()'), shown: await json('__gm.graph.current()') };
  check(
    'creating an asset through + opens its tab on the new one',
    Boolean(created) && fresh.tab === 'graph' && fresh.shown === created,
    JSON.stringify(fresh),
  );
  await undo();
  await mutate(
    `__gm.state.project.assets = __gm.state.project.assets.filter((a) => !['sm-open', 'tex-open', 'anim-open', 'box-open', 'at-open'].includes(a.id))`,
  );
  await showTab('scene');

  // 4e. Asset defaults: the Crate deviates in height (60 against the schema's 100) and colour,
  //     so two rows carry a reset. Rows run Enabled, Width, Height, Color, Texture, so height's
  //     reset is the first on screen and colour's the last.
  await select({ kind: 'asset', assetId: 'crate' });
  const heightReset = await evaluate(`__gm.locateIcon('reset')`);
  const colorReset = await evaluate(`__gm.locateIcon('reset', true)`);
  check('asset inspector shows a reset per deviating property', Boolean(heightReset));
  // The reset is a picture since #214, no longer a character from the system font: its circle
  // passes 4.8 units right of its centre, drawn in the muted text colour.
  const onResetRing = await json(`__gm.pixelAt(${heightReset.x + 4}, ${heightReset.y + 1})`);
  const muted = await json("__gm.themeColor('textMuted')");
  check(
    'the reset button draws its picture',
    colourDistance(onResetRing, muted) < 40,
    JSON.stringify({ onResetRing, muted }),
  );
  check(
    'the two deviations have two separate resets',
    Boolean(colorReset) && colorReset.y > heightReset.y,
    JSON.stringify({ heightReset, colorReset }),
  );
  await click(heightReset.x, heightReset.y);
  check(
    'reset puts the asset property back to its default',
    (await asset('crate')).props.height === 100,
    `height=${(await asset('crate')).props.height}`,
  );
  const remaining = await evaluate(`__gm.locateIcon('reset')`);
  check(
    'the reset of the property now at its default is gone, the other one stays',
    Boolean(remaining) &&
      remaining.y === colorReset.y &&
      remaining.y === (await evaluate(`__gm.locateIcon('reset', true)`)).y,
    JSON.stringify({ remaining, colorReset }),
  );
  await shot('15-asset-reset');
  await undo();
  check(
    'undo restores the asset value',
    (await asset('crate')).props.height === 60,
    `height=${(await asset('crate')).props.height}`,
  );
  check(
    'the height reset is back after undo',
    (await evaluate(`__gm.locateIcon('reset')`))?.y === heightReset.y,
    JSON.stringify(await evaluate(`__gm.locateIcon('reset')`)),
  );

  // 4f. The same gold in the asset list: a row is marked while the asset carries anything the
  //      inspector marks. The Crate deviates twice, so it takes two resets to turn it plain.
  const GOLD = '#f2c84b';
  const PLAIN = '#e6e8ee';
  const assetColor = (id) => json(`__gm.assetRowColor('${id}')`);
  check('a deviating asset is marked gold in the list', (await assetColor('crate')) === GOLD);
  check('an asset at its defaults is not', (await assetColor('cam')) === PLAIN, await assetColor('cam'));
  // The Mover's `speed` is 200 against a declared variable default of 0. The inspector marks no
  // variable, so neither may the list – the two must say the same thing.
  check(
    'a behavior is not marked for a variable value, which the inspector does not mark either',
    (await assetColor('mover')) === PLAIN,
    await assetColor('mover'),
  );
  await click(heightReset.x, heightReset.y);
  check(
    'the mark stays while the second deviation is left',
    (await assetColor('crate')) === GOLD,
    await assetColor('crate'),
  );
  const colorOnly = await evaluate(`__gm.locateIcon('reset')`);
  await click(colorOnly.x, colorOnly.y);
  check(
    'resetting the last deviation clears the mark, without a reload',
    (await assetColor('crate')) === PLAIN,
    `${await assetColor('crate')} props=${JSON.stringify((await asset('crate')).props)}`,
  );
  await shot('15b-asset-marks');
  await undo();
  await undo();
  check(
    'undo brings the mark back',
    (await assetColor('crate')) === GOLD,
    `${await assetColor('crate')} props=${JSON.stringify((await asset('crate')).props)}`,
  );

  // 4g. The list is grouped by type (#176): a heading per type, groups and the assets in them
  //     alphabetical, each heading with an icon of its own. A freshly opened project shows every
  //     group folded – reloaded here, since the modules before have unfolded groups by selecting.
  await evaluate('__gm.state.loadProject(__gm.state.project, __gm.state.revision)');
  await sleep(100);
  const groups = await json('__gm.assetGroups()');
  const nameOf = Object.fromEntries(
    (await json('__gm.state.project.assets.map((a) => [a.id, a.name])')).map(([id, name]) => [id, name]),
  );
  const collator = new Intl.Collator('en', { numeric: true, sensitivity: 'base' });
  const sorted = (list) => list.every((v, i) => i === 0 || collator.compare(list[i - 1], v) <= 0);
  check(
    'the assets panel groups by type, groups and assets sorted by name',
    groups.length >= 4 &&
      sorted(groups.map((g) => g.label)) &&
      groups.every((g) => sorted(g.ids.map((id) => nameOf[id]))) &&
      groups.flatMap((g) => g.ids).length === Object.keys(nameOf).length,
    JSON.stringify(groups.map((g) => [g.label, g.ids.map((id) => nameOf[id])])),
  );
  check(
    'a loaded project shows every group folded',
    groups.every((g) => !g.expanded) && (await json("__gm.assetRowShown('crate')")) === null,
    JSON.stringify(groups.map((g) => [g.label, g.expanded])),
  );
  // Read in the drawn picture: every icon inks its 16 units in the muted colour, and no two alike.
  // Every pixel against the row's own background (`+`), since a 1.5 unit outline on half pixels is
  // smoothed and never quite the colour; the exact colour (`#`) still shows where the ink is solid.
  const MUTED = '#8a90a0';
  const icons = await json(`(() => Object.fromEntries(__gm.assetGroups().map((g) => {
    const c = __gm.assetGroupIcon(g.type);
    const grid = [];
    for (let dy = -7; dy <= 7; dy++) for (let dx = -7; dx <= 7; dx++) grid.push({ x: c.x + dx, y: c.y + dy });
    const [background, ...ink] = __gm.pixels([{ x: c.x, y: c.y - 9 }, ...grid]);
    const mask = ink.map((p) => (p === '${MUTED}' ? '#' : p === background ? '.' : '+')).join('');
    return [g.type, mask];
  })))()`);
  const masks = Object.values(icons);
  check(
    'every heading draws its icon in the muted colour, and no two icons look alike',
    masks.every((m) => m.replaceAll('.', '').length >= 20 && m.includes('#')) &&
      new Set(masks.map((m) => m.replaceAll('#', '+'))).size === masks.length,
    JSON.stringify(icons),
  );

  // A press on the heading unfolds the group, a second folds it again: rows come and go, the
  // heading and its count stay, and the selection is left where it was.
  await select({ kind: 'asset', assetId: 'cam' });
  const sprites = await json("__gm.assetRow('group:sprite')");
  const spriteGroup = async () => ({
    expanded: (await json('__gm.assetGroups()')).find((g) => g.type === 'sprite').expanded,
    crate: await json("__gm.assetRowShown('crate')"),
    heading: await json("__gm.assetRow('group:sprite')"),
    selected: (await json('__gm.state.selection'))?.assetId,
  });
  await click(sprites.x, sprites.y);
  const unfolded = await spriteGroup();
  check(
    'a click on a folded heading unfolds its group below it and selects nothing',
    unfolded.expanded === true &&
      Boolean(unfolded.crate) &&
      Boolean(unfolded.heading) &&
      unfolded.heading.y < unfolded.crate.y &&
      unfolded.selected === 'cam' &&
      (await has('Sprites')),
    JSON.stringify(unfolded),
  );
  await shot('15c-asset-groups');
  await click(sprites.x, sprites.y);
  const folded = await spriteGroup();
  check(
    'a second click folds it again',
    folded.expanded === false &&
      folded.crate === null &&
      Boolean(folded.heading) &&
      folded.selected === 'cam',
    JSON.stringify(folded),
  );
  // Selecting a folded asset from elsewhere – a picker, a graph – unfolds its group.
  await select({ kind: 'asset', assetId: 'crate' });
  check(
    'selecting an asset in a folded group unfolds it',
    (await json('__gm.assetGroups()')).find((g) => g.type === 'sprite').expanded === true &&
      Boolean(await json("__gm.assetRowShown('crate')")),
    JSON.stringify(await json('__gm.assetGroups()')),
  );
  // Folding the group of the selected asset lets go of the selection – it would unfold it again.
  const heading = await json("__gm.assetRow('group:sprite')");
  await click(heading.x, heading.y);
  const released = await spriteGroup();
  check(
    'folding the group of the selected asset folds it and clears the selection',
    released.expanded === false && released.crate === null && released.selected === undefined,
    JSON.stringify(released),
  );

  // 4h. The same icons elsewhere: in front of every type in the `+` menu, and at the right edge of
  //     a scene object's row, where its type used to be spelled out.
  await clickText('+');
  const menuRows = await json('__gm.menuRows()');
  const menuIcons = await json('__gm.menuIcons()');
  await shot('15d-add-menu');
  await press('Escape');
  check(
    'every type in the + menu has its icon in front',
    menuRows.filter(Boolean).length >= 15 &&
      menuRows.every((row, i) => (row === null) === (menuIcons[i] === null) && menuIcons[i] !== false),
    JSON.stringify({ menuRows, menuIcons }),
  );
  await showTab('scene');
  const first = (await json('__gm.hierarchyOrder()'))[0];
  const typeOfFirst = await json(`(() => {
    const scene = __gm.state.activeScene;
    const o = scene.objects.find((x) => x.id === ${JSON.stringify(first)});
    return __gm.state.project.assets.find((a) => a.id === o.assetId).type;
  })()`);
  const rowAt = await json(`__gm.hierarchyRow(${JSON.stringify(first)})`);
  const iconAt = await json(`__gm.hierarchyIcon(${JSON.stringify(first)})`);
  const ink = await json(`(() => {
    const c = __gm.hierarchyIcon(${JSON.stringify(first)});
    const grid = [];
    for (let dy = -7; dy <= 7; dy++) for (let dx = -7; dx <= 7; dx++) grid.push({ x: c.x + dx, y: c.y + dy });
    const [background, ...ink] = __gm.pixels([{ x: c.x - 12, y: c.y }, ...grid]);
    return ink.filter((p) => p !== background).length;
  })()`);
  const typeWords = (await json(`__gm.locateAll(${JSON.stringify(typeOfFirst)})`)).filter(
    (p) => Math.abs(p.y - rowAt.y) < 8,
  );
  check(
    'a scene object shows its type as an icon at the right edge, no longer as a word',
    Boolean(iconAt) && iconAt.x > rowAt.x && ink >= 20 && typeWords.length === 0,
    JSON.stringify({ first, typeOfFirst, rowAt, iconAt, ink, typeWords }),
  );
}

/**
 * 4a-ii. Where no menu of its own opens – on a group heading or on the empty space below the rows –
 * a right-click brings up the + menu (#244). The heading stays folded as it was.
 */
async function addMenuOnRightClick(t) {
  const { check, json, shot, click, clickText, press, undo, showTab } = t;
  const addRows = (rows) =>
    Array.isArray(rows) && rows.filter(Boolean).length === ASSET_TYPE_COUNT && rows.includes('Sprite');
  const heading = await json("__gm.assetRowShown('group:scene')");
  const sceneFolded = async () =>
    !(await json('__gm.assetGroups()')).find((g) => g.type === 'scene').expanded;
  const foldedBefore = await sceneFolded();
  await click(heading.x, heading.y, 'right');
  const onHeading = await json('__gm.menuRows()');
  check(
    'a right-click on a group heading opens the + menu and leaves the group as it was',
    addRows(onHeading) && (await sceneFolded()) === foldedBefore,
    JSON.stringify({ onHeading, foldedBefore }),
  );
  await press('Escape');
  const groups = await json('__gm.assetGroups()');
  const lastGroup = groups.at(-1);
  const lastShown = await json(
    `__gm.assetRowShown(${JSON.stringify(lastGroup.expanded ? lastGroup.ids.at(-1) : `group:${lastGroup.type}`)})`,
  );
  const panel = await json('__gm.assetsRect()');
  const empty = { x: panel.x + panel.w / 2, y: panel.y + panel.h - 12 };
  await click(empty.x, empty.y, 'right');
  const onEmpty = await json('__gm.menuRows()');
  check(
    'a right-click on the empty space below the rows opens the + menu',
    empty.y > lastShown.y + 20 && addRows(onEmpty),
    JSON.stringify({ empty, lastShown, onEmpty }),
  );
  await shot('11c-add-menu-on-right-click');
  const before = (await json('__gm.state.project.assets')).length;
  await clickText('Behavior');
  const fromMenu = await json('__gm.state.project.assets.at(-1)');
  check(
    'an entry of that menu creates the asset like the + button does',
    (await json('__gm.state.project.assets')).length === before + 1 && fromMenu.type === 'behavior',
    JSON.stringify(fromMenu && { type: fromMenu.type, name: fromMenu.name }),
  );
  await undo();
  await showTab('scene');
}