import { LANES, MAKE_OBJECT } from './lib/scaffold.mjs';

/** Draw order: symbols always above sprites, `z` above hierarchy order. */
export async function drawing(t) {
  const { check, json, shot, click, drag, locate, typeText, press, undo, mutate, select, object } = t;
  const orderOfCrates = () => json(`__gm.drawOrder().filter(id => id === 'o1' || id === 'o2')`);

  // 5a. Symbols stay on top: put the camera first in the hierarchy (drawn first) and a crate
  //     right on top of its icon → the icon must still be drawn above the sprite.
  await mutate(`
    const objs = __gm.state.activeScene.objects;
    const cam = objs.splice(objs.findIndex(o => o.id === 'o3'), 1)[0];
    objs.unshift(cam);
    const crate = objs.find(o => o.id === 'o1');
    crate.position.x = 0; crate.position.y = 0;
    __gm.state.select(null)`);
  const layers = await json(`[__gm.layerOf('o3'), __gm.layerOf('o1'), __gm.layerOf('o2')]`);
  check(
    'camera symbol is drawn in the overlay layer above sprites',
    JSON.stringify(layers) === '["overlay","objects","objects"]',
    JSON.stringify(layers),
  );
  await shot('13-symbol-on-top');

  // 5b. Z-order: put both crates on the origin. With equal z the hierarchy order wins
  //     (o1 before o2 → o2 on top); raising o1's z draws it above o2; undo restores it.
  await mutate(
    `const o2 = __gm.state.activeScene.objects.find(o => o.id === 'o2'); o2.position.x = 0; o2.position.y = 0`,
  );
  check(
    'equal z keeps hierarchy order',
    JSON.stringify(await orderOfCrates()) === '["o1","o2"]',
    JSON.stringify(await orderOfCrates()),
  );
  await select({ kind: 'object', holderId: 'scene1', objectId: 'o1' });
  const zLabel = await locate('Z');
  await click(zLabel.x + 160, zLabel.y); // plain click → text editing with everything selected
  await typeText('5');
  await press('Enter');
  check(
    'Z field sets position.z',
    (await object('o1')).position.z === 5,
    `z=${(await object('o1')).position.z}`,
  );
  check(
    'higher z is drawn on top',
    JSON.stringify(await orderOfCrates()) === '["o2","o1"]',
    JSON.stringify(await orderOfCrates()),
  );
  await shot('14-z-order');
  await undo();
  check('undo restores z', (await object('o1')).position.z === 0, `z=${(await object('o1')).position.z}`);

  // 5b-ii. Sort with parent (#232): o2 hangs under o1 at z -1, and a third crate stands before o1
  //        in the hierarchy. The fixture's crate is stored without the switch, so o2 first drops
  //        behind everything on 0; switched on in the inspector it is drawn right behind o1. Undo,
  //        and the scene is put back for the blocks below.
  await mutate(`
    const objs = __gm.state.activeScene.objects;
    const o2 = objs.find(o => o.id === 'o2');
    o2.parentId = 'o1'; o2.position.z = -1;
    objs.splice(objs.findIndex(o => o.id === 'o1'), 0, { id: 'o-sort', assetId: 'crate', name: '', position: { x: 0, y: 0, z: 0 }, editorOffset: { x: 0, y: 0 }, overrides: {}, parentId: '', instanceEdits: {} });`);
  const sortOrder = () => json(`__gm.drawOrder().filter(id => ['o-sort', 'o1', 'o2'].includes(id))`);
  const orderOff = await sortOrder();
  await select({ kind: 'object', holderId: 'scene1', objectId: 'o2' });
  const sortRow = await json("__gm.inspectorField('Sort with parent')");
  if (sortRow) await click(sortRow.x, sortRow.y);
  const sortOverride = (await object('o2')).overrides.sortWithParent;
  const orderOn = await sortOrder();
  await undo();
  const orderUndone = await sortOrder();
  check(
    'Sort with parent draws a child below 0 right behind its parent, and undo takes it back',
    JSON.stringify(orderOff) === '["o2","o-sort","o1"]' &&
      sortOverride === true &&
      JSON.stringify(orderOn) === '["o-sort","o2","o1"]' &&
      JSON.stringify(orderUndone) === JSON.stringify(orderOff),
    JSON.stringify({ sortRow, orderOff, sortOverride, orderOn, orderUndone }),
  );
  await shot('14b-sort-with-parent');
  await mutate(`
    const objs = __gm.state.activeScene.objects;
    const o2 = objs.find(o => o.id === 'o2');
    o2.parentId = ''; o2.position.z = 0;
    objs.splice(objs.findIndex(o => o.id === 'o-sort'), 1);
    __gm.state.select(null)`);

  // 5b-iii. A container sorted with its parent (#243): a container under o1 holds a crate on -1 in
  //         its template, a third crate stands before o1. Off, as a new container starts, the crate
  //         inside drops behind everything on 0; the container's own switch draws it right behind o1.
  const INSIDE = 'o-cont~sort-in';
  await mutate(`
    const p = __gm.state.project;
    const objs = __gm.state.activeScene.objects;
    const make = (id, assetId, parentId, z) => ({ id, assetId, name: '', position: { x: 0, y: 0, z }, editorOffset: { x: 0, y: 0 }, overrides: {}, parentId, instanceEdits: {} });
    p.assets.push({ id: 'sort-box', type: 'container', name: 'sort-box', props: { enabled: true }, objects: [make('sort-in', 'crate', '', -1)] });
    objs.splice(objs.findIndex(o => o.id === 'o1'), 0, make('o-sort', 'crate', '', 0));
    objs.push(make('o-cont', 'sort-box', 'o1', 0));`);
  const boxOrder = () =>
    json(`__gm.drawOrder().filter(id => ['o-sort', 'o1', ${JSON.stringify(INSIDE)}].includes(id))`);
  const boxOff = await boxOrder();
  await select({ kind: 'object', holderId: 'scene1', objectId: 'o-cont' });
  const boxRow = await json("__gm.inspectorField('Sort with parent')");
  if (boxRow) await click(boxRow.x, boxRow.y);
  const boxOverride = (await object('o-cont')).overrides.sortWithParent;
  const boxOn = await boxOrder();
  await undo();
  const boxUndone = await boxOrder();
  check(
    'Sort with parent on a container draws its content right behind the parent of the container, and undo takes it back',
    JSON.stringify(boxOff) === `["${INSIDE}","o-sort","o1"]` &&
      boxOverride === true &&
      JSON.stringify(boxOn) === `["o-sort","${INSIDE}","o1"]` &&
      JSON.stringify(boxUndone) === JSON.stringify(boxOff),
    JSON.stringify({ boxRow, boxOff, boxOverride, boxOn, boxUndone }),
  );
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    scene.objects = scene.objects.filter(o => o.id !== 'o-sort' && o.id !== 'o-cont');
    p.assets = p.assets.filter(a => a.id !== 'sort-box');
    __gm.state.select(null)`);

  // 5c. The symbols are the asset panel's icons, white in a dark outline and without a plate
  //     behind them: one of each in a lane of its own, the pixels read on a grid over each icon
  //     (±12 world units round its centre). Each must show white and the outline, and none of the
  //     colours the symbols had before.
  const PLACED = { 's-beh': 'mover', 's-box': 's-box-a', 's-rb': 's-rb-a', 's-cam': 'cam', 's-pt': 's-pt-a' };
  const ids = Object.keys(PLACED);
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    ${MAKE_OBJECT}
    p.assets.push(
      { id: 's-box-a', type: 'container', name: 's-box-a', props: { enabled: true }, objects: [] },
      { id: 's-rb-a', type: 'rigidbody', name: 's-rb-a', props: { bodyType: 'static' } },
      { id: 's-pt-a', type: 'particles', name: 's-pt-a', props: {}, graph: { nodes: [], edges: [] } },
    );
    Object.entries(${JSON.stringify(PLACED)}).forEach(([id, assetId], i) => {
      const o = make(id, assetId, '', ${LANES.symbols}, id);
      o.position.x = (i - 2) * 120;
      scene.objects.push(o);
    });
    __gm.state.select(null);
    __gm.lookAt(0, ${LANES.symbols});`);
  const looks = await json(`(() => {
    const zoom = __gm.objectRect('s-beh').w / 28;
    const old = ['#b066ff', '#3fb8c9', '#4fd18b', '#c26a1f'];
    const rgb = (c) => [1, 3, 5].map((i) => parseInt(c.slice(i, i + 2), 16));
    const near = (a, b, max) => Math.hypot(...rgb(a).map((v, i) => v - rgb(b)[i])) < max;
    return ${JSON.stringify(ids)}.map((id) => {
      const icon = __gm.sceneIcon(id);
      const seen = { id, white: 0, outline: 0, old: [] };
      const grid = [];
      for (let dx = -12; dx <= 12; dx += 1.5)
        for (let dy = -12; dy <= 12; dy += 1.5)
          grid.push({ x: Math.floor(icon.screen.x + dx * zoom), y: Math.floor(icon.screen.y + dy * zoom) });
      for (const got of __gm.pixels(grid)) {
        if (got === '#ffffff') seen.white++;
        // The outline is thin, so at this zoom it is mostly an edge pixel blended into the
        // background (#111216 and the like), rarely the exact #0b0c0f.
        else if (near(got, '#0b0c0f', 20)) seen.outline++;
        else if (old.includes(got)) seen.old.push(got);
      }
      return seen;
    });
  })()`);
  const wrong = looks.filter((s) => s.white < 4 || s.outline < 4 || s.old.length > 0);
  check(
    'every symbol draws its icon white in a dark outline, in none of the old colours',
    wrong.length === 0,
    JSON.stringify(wrong.length ? wrong : looks.map((s) => `${s.id} ${s.white}/${s.outline}`)),
  );
  await shot('15-symbols');

  // 5c-ii. Eight symbols on one spot stand on a ring, their names beside them on dark plates. Names
  //        that would cover each other go a row up or down instead – none overlaps another or an
  //        icon – and every name stays on its icon's side of the ring.
  const crowd = Array.from({ length: 8 }, (_, k) => `s-crowd-${k}`);
  await mutate(`
    const scene = __gm.state.activeScene;
    ${MAKE_OBJECT}
    const assets = ${JSON.stringify(Object.values(PLACED))};
    ${JSON.stringify(crowd)}.forEach((id, k) => {
      scene.objects.push(make(id, assets[k % assets.length], '', ${LANES.symbols}, 'crowded name ' + k));
    });
    __gm.lookAt(0, ${LANES.symbols});`);
  const plates = await json(`(() => {
    const crowd = ${JSON.stringify(crowd)};
    const icons = crowd.map((id) => __gm.sceneIcon(id));
    const labels = __gm.sceneLabels().filter((l) => crowd.includes(l.id));
    return { icons: icons.map((i) => ({ x: i.x, y: i.y, size: i.size })), labels };
  })()`);
  const cross = (a, b) =>
    a.x < b.x + b.w - 1e-6 && b.x < a.x + a.w - 1e-6 && a.y < b.y + b.h - 1e-6 && b.y < a.y + a.h - 1e-6;
  const iconBoxes = plates.icons.map((i) => ({
    x: i.x - i.size / 2,
    y: i.y - i.size / 2,
    w: i.size,
    h: i.size,
  }));
  const clashes = [];
  plates.labels.forEach((a, i) => {
    plates.labels.slice(i + 1).forEach((b) => cross(a, b) && clashes.push(`${a.id}/${b.id}`));
    iconBoxes.forEach((box, k) => cross(a, box) && clashes.push(`${a.id}/icon ${k}`));
  });
  const sides = plates.labels.filter((l) => {
    const icon = plates.icons[crowd.indexOf(l.id)];
    return l.left ? l.x + l.w > icon.x : l.x < icon.x;
  });
  check(
    'names crowded on one spot stand on plates in rows of their own, on their icons’ side',
    plates.labels.length === 8 && clashes.length === 0 && sides.length === 0,
    `${plates.labels.length} plates, clashes ${JSON.stringify(clashes)}, wrong side ${JSON.stringify(sides.map((l) => l.id))}`,
  );
  await shot('15a-crowded-names');
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    scene.objects = scene.objects.filter((o) => ![...${JSON.stringify(ids)}, ...${JSON.stringify(crowd)}].includes(o.id));
    p.assets = p.assets.filter((a) => !['s-box-a', 's-rb-a', 's-pt-a'].includes(a.id));
    __gm.lookAt(0, 0);`);

  // 5d. A pan only moves the camera: no collect and no redraw of every shape per move. What it
  //     leaves on screen – the crate, its outline, the grid – must be what a full redraw draws, and
  //     an object panned back into view must be drawn again.
  await select({ kind: 'object', holderId: 'scene1', objectId: 'o1' });
  const vr = await json('__gm.viewportRect()');
  const cx = Math.round(vr.x + vr.w / 2);
  const cy = Math.round(vr.y + vr.h / 2);
  const info = () => json('__gm.viewportInfo()');
  const rows = () =>
    json(`(() => {
      const r = __gm.objectRect('o1');
      const x = Math.round(r.x - r.w / 2 - 20);
      return [r.y, r.y - r.h / 2 - 2, r.y + r.h / 2 + 2].map((y) => __gm.pixelRow(x, Math.round(y), Math.round(r.w + 40)).join());
    })()`);
  const sameAsRedraw = async () => {
    const panned = await rows();
    await json('(__gm.viewportRedraw(), true)');
    const fresh = await rows();
    return panned.filter((row, i) => row !== fresh[i]).length;
  };
  const before = await info();
  await drag(cx, cy, cx + 36, cy + 24, { steps: 12, button: 'middle' });
  const after = await info();
  const moves = after.cameraMoves - before.cameraMoves;
  const redraws = after.redraws - before.redraws;
  check(
    'a pan moves the camera without redrawing the scene',
    moves >= 8 && redraws <= 4,
    `${moves} camera moves, ${redraws} redraws in 12 steps`,
  );
  const offAfterPan = await sameAsRedraw();
  check('a panned view draws what a full redraw draws', offAfterPan === 0, `${offAfterPan} of 3 rows differ`);
  // Far enough that the crate's right edge passes the view's left one.
  const crate = await json(`__gm.objectRect('o1')`);
  const away = Math.round(crate.x + crate.w / 2 - vr.x + 20);
  await drag(cx, cy, cx - away, cy, { steps: 12, button: 'middle' });
  const gone = !(await json('__gm.drawOrder()')).includes('o1');
  const back0 = await info();
  // Pressed inside the view again: a press out over the panel would pan nothing.
  await drag(cx, cy, cx + away, cy, { steps: 12, button: 'middle' });
  const back = await info();
  const shown = (await json('__gm.drawOrder()')).includes('o1');
  const offAfterReturn = await sameAsRedraw();
  check(
    'an object panned out of view and back is drawn again',
    gone && shown && back.redraws > back0.redraws && offAfterReturn === 0,
    `gone=${gone} shown=${shown} redraws=${back.redraws - back0.redraws} rowsOff=${offAfterReturn}`,
  );
  await shot('15b-panned');
  await mutate(`__gm.state.select(null); __gm.lookAt(0, 0)`);
}