#!/usr/bin/env node
/**
 * Plays the example game (tools/seed-jumprun.mjs) in a headless browser: title screen, start
 * button, running, jumping, collecting a coin, the win screen, restart and the lose screen.
 * It is the proof that the engine features this game needs actually work together.
 *
 * Usage: node tools/seed-jumprun.mjs && node tools/smoke-jumprun.mjs
 * Screenshots land in /tmp/gm-jr-*.png.
 */
import { instanceChild } from './lib/builders.mjs';
import { runChecks } from './lib/harness.mjs';
import { PROJECTS, cliArgs } from './lib/projects.mjs';

const { projectId, baseUrl } = cliArgs('smoke-jumprun.mjs', PROJECTS.jumpRun);

/**
 * What the editor lists: the six stored objects plus everything the placed containers resolve to
 * (the level with its ten nested coins, and the three screens). A mismatch means the loader
 * dropped something.
 */
const OBJECT_COUNT = 77;

/** The scene stores the container objects alone – the rest is resolved from their templates. */
const STORED_COUNT = 6;

// Ids inside a placed container are derived from the template path, never stored.
const PLAYER = instanceChild('L', 'player');
const START_BUTTON = instanceChild('T', 'title-button');
const AGAIN_BUTTON = instanceChild('W', 'win-button');
const GRAPHS = { player: [34, 37], game: [38, 43], 'start-button': [7, 6], 'restart-button': [2, 1] };
const GROUND_Y = 130;

await runChecks({ projectId, baseUrl, port: 9336, shotPrefix: 'gm-jr' }, async (t) => {
  const {
    check,
    sleep,
    evaluate,
    json,
    shot,
    click,
    holdKey,
    press,
    entity,
    world,
    mutate,
    play,
    stop,
    navigate,
    exceptions,
    has,
  } = t;

  /** Variables of the "Game" behavior instance, live from the running world. */
  const gameVars = async () => (await entity('ogame')).props;
  const coins = async () => (await world()).entities.filter((e) => e.name === 'Coin').length;
  /** Clicks an object where the *player* sees it (through the camera), not in the scene view. */
  const clickObject = async (objectId) => {
    const p = await json(`__gm.gameScreen(${JSON.stringify(objectId)})`);
    if (!p) throw new Error(`object ${objectId} is not on screen in the game view`);
    await click(p.x, p.y);
  };
  /**
   * Edits the play copy (never the saved project) and pushes it into the running world. The
   * stored list is the right one here: play bakes every placed container into it, and only a
   * stored object can be written to.
   */
  const setVariable = (objectId, key, value) =>
    mutate(
      `__gm.state.activeScene.objects.find((x) => x.id === ${JSON.stringify(objectId)}).overrides[${JSON.stringify(key)}] = ${JSON.stringify(value)}`,
    );

  await navigate();

  // 1. Nothing was dropped by the loader: every node and edge of the four behaviors survived.
  const graphs = await json(
    `__gm.state.project.assets.filter((a) => a.type === 'behavior').map((a) => ({ id: a.id, n: a.graph.nodes.length, e: a.graph.edges.length }))`,
  );
  check(
    'all behavior graphs load complete (no unknown node types, no dropped edges)',
    graphs.length === 4 &&
      graphs.every((g) => GRAPHS[g.id] && g.n === GRAPHS[g.id][0] && g.e === GRAPHS[g.id][1]),
    JSON.stringify(graphs),
  );
  const objectCount = await evaluate('__gm.sceneObjects().length');
  const storedCount = await evaluate('__gm.state.activeScene.objects.length');
  check('the scene holds the seeded objects', objectCount === OBJECT_COUNT, `${objectCount} objects`);
  check(
    'the placed containers are stored as one object each, their content only resolved',
    storedCount === STORED_COUNT,
    `${storedCount} stored, ${objectCount} listed`,
  );
  await shot('01-editor');

  // 2. Play: the Game behavior shows the title screen and switches the level off.
  await play();
  await sleep(300);
  check('play opens the Game tab', (await evaluate('__gm.tab()')) === 'game');
  check('the title screen is up', await has('JUMP & RUN'));
  const level = await entity('L');
  const title = await entity('T');
  check(
    'the Game behavior switched the level off and the title on',
    level.props.enabled === false && title.props.enabled === true,
    JSON.stringify({ level: level.props.enabled, title: title.props.enabled }),
  );
  await shot('02-title');

  // 3. The Start button is a click target in the running game (On click + hit test).
  await clickObject(START_BUTTON);
  await sleep(400);
  check(
    'clicking Start hides the title and shows the level',
    (await entity('L')).props.enabled === true && (await entity('T')).props.enabled === false,
  );
  const vars = await gameVars();
  check(
    'the run starts with a full clock and no coins',
    vars.running === true && vars.coins === 0 && vars.timeLeft > 28,
    JSON.stringify(vars),
  );
  await shot('03-running');

  // 3a. Play bakes the placed containers into stored objects, keeping the ids the editor showed –
  //     which is why the checks below can address the player and the buttons by the same id.
  const baked = await json('__gm.state.activeScene.objects.map((o) => o.id)');
  check(
    'play spells the containers out under the ids the editor listed',
    baked.length === OBJECT_COUNT && [PLAYER, START_BUTTON, AGAIN_BUTTON].every((id) => baked.includes(id)),
    `${baked.length} objects, player ${baked.includes(PLAYER)}`,
  );

  // 4. Gravity: the player rests on the ground (its 40-high box on the ground's top edge, y = 150).
  const grounded = await entity(PLAYER);
  check(
    'gravity dropped the player onto the ground (top edge at y = 150)',
    Math.abs(grounded.worldY - GROUND_Y) < 1.5,
    `world y ${grounded.worldY.toFixed(2)}`,
  );

  // 5. Jumping: Space lifts the player (y gets smaller) and gravity brings it back down.
  await press('Space');
  await sleep(200);
  const airborne = await entity(PLAYER);
  check(
    'Space makes the player jump',
    airborne.worldY < grounded.worldY - 25,
    `y ${grounded.worldY.toFixed(1)} → ${airborne.worldY.toFixed(1)}`,
  );
  await sleep(1200);
  const landed = await entity(PLAYER);
  check(
    'the player falls back onto the ground',
    Math.abs(landed.worldY - GROUND_Y) < 1.5,
    `y ${landed.worldY.toFixed(2)}`,
  );
  await shot('04-jumped');

  // 6. Walking and collecting: running into a coin removes it and counts up.
  const coinsBefore = await coins();
  await holdKey('ArrowRight', 1500);
  const walked = await entity(PLAYER);
  check(
    'arrow keys walk the player',
    walked.worldX > landed.worldX + 40,
    `x ${landed.worldX.toFixed(1)} → ${walked.worldX.toFixed(1)}`,
  );
  const afterCoin = await gameVars();
  const coinsAfter = await coins();
  check(
    'running into a coin collects it',
    afterCoin.coins >= 1 && coinsAfter < coinsBefore,
    JSON.stringify({ coins: afterCoin.coins, before: coinsBefore, after: coinsAfter }),
  );
  // Against the count the run actually reached, not a fixed 1: how many coins the walk sweeps up
  // depends on machine speed – a faster host collects two.
  const hud = `Coins ${afterCoin.coins}/${afterCoin.needed}`;
  check('the HUD shows the counter', await has(hud), hud);
  check('the clock is counting down', afterCoin.timeLeft < 28, `timeLeft ${afterCoin.timeLeft}`);
  await shot('05-collected');

  // 7. Winning: with all ten coins the Game behavior swaps the level for the win screen.
  await setVariable('ogame', 'coins', 10);
  await sleep(300);
  check(
    'collecting everything wins the game',
    (await has('YOU WIN!')) &&
      (await entity('W')).props.enabled === true &&
      (await entity('L')).props.enabled === false,
  );
  await shot('06-won');

  // 8. Restart game: back to a fresh run at the title screen, coins and clock reset.
  await clickObject(AGAIN_BUTTON);
  await sleep(1200);
  check(
    'Play again restarts the scene at the title screen',
    (await has('JUMP & RUN')) && (await evaluate('__gm.state.mode')) === 'play',
  );
  check('the restarted run has all ten coins back', (await coins()) === 10, `${await coins()} coins`);

  // 9. Losing: start again, run the clock out.
  await clickObject(START_BUTTON);
  await sleep(300);
  await setVariable('ogame', 'timeLeft', 0.2);
  await sleep(600);
  check(
    'the clock running out loses the game',
    (await has('TIME UP')) && (await entity('B')).props.enabled === true,
  );
  await shot('07-lost');

  // 10. Stop throws the run away – the saved project is untouched.
  await stop();
  await sleep(200);
  const saved = await json(
    '{ objects: __gm.sceneObjects().length, stored: __gm.state.activeScene.objects.length, mode: __gm.state.mode, tab: __gm.tab() }',
  );
  check(
    'stop restores the edited scene',
    saved.objects === OBJECT_COUNT &&
      saved.stored === STORED_COUNT &&
      saved.mode === 'edit' &&
      saved.tab === 'scene',
    JSON.stringify(saved),
  );
  check('no exceptions during the run', exceptions().length === 0, exceptions().slice(0, 3).join(' | '));
});