import { edge, node } from '../lib/builders.mjs';
import { MAKE_OBJECT } from './lib/scaffold.mjs';

/**
 * "Run in editor": a behavior that keeps running while the project is not playing, and whose
 * work lands in the saved project.
 *
 * The step brings its own box and its own behavior instead of using the fixture's Mover, so that
 * the drifting checks measure nothing but time. Everything it adds is removed again at the end.
 */

const DRIFT_PER_SECOND = 100;
const WALK_PER_SECOND = 200;
/** Must stay in step with `GameViewport.editorRunCaption`. */
const EDITOR_RUN_CAPTION = 'Behaviors run here · keys and clicks go to the game';

/** `On key held(ArrowRight) → Move(owner)`: moves only while that key reaches the world. */
const walkGraph = {
  nodes: [
    node('k-held', 'OnKeyHeld', 0, 0, { key: 'ArrowRight' }),
    node('k-owner', 'Owner', 0, 120),
    node('k-move', 'Move', 340, 0, { dx: 1, scale: WALK_PER_SECOND }),
  ],
  edges: [
    edge('k-e1', 'k-held', 'exec', 'k-move', 'exec'),
    edge('k-e2', 'k-held', 'dt', 'k-move', 'dt'),
    edge('k-e3', 'k-owner', 'object', 'k-move', 'object'),
  ],
};

/** `On update → Move(owner, dx = 1, scale = 100)`: the owner drifts right, without any input. */
const driftGraph = {
  nodes: [
    node('d-update', 'OnUpdate', 0, 0),
    node('d-owner', 'Owner', 0, 120),
    node('d-move', 'Move', 340, 0, { dx: 1, scale: DRIFT_PER_SECOND }),
  ],
  edges: [
    edge('d-e1', 'd-update', 'exec', 'd-move', 'exec'),
    edge('d-e2', 'd-update', 'dt', 'd-move', 'dt'),
    edge('d-e3', 'd-owner', 'object', 'd-move', 'object'),
  ],
};

export async function editorRun(t) {
  const {
    check,
    sleep,
    evaluate,
    json,
    shot,
    click,
    holdKey,
    mutate,
    undo,
    object,
    api,
    projectId,
    showTab,
  } = t;

  // 17a. A box with a drifting behavior below it. Written into the model directly: what is under
  //      test is the switch, not another way of building a graph.
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    const asset = structuredClone(p.assets.find((a) => a.id === 'mover'));
    Object.assign(asset, {
      id: 'drifter',
      name: 'Drifter',
      props: { enabled: true, runInEditor: false },
      variables: [],
      graph: ${JSON.stringify(driftGraph)},
    });
    p.assets.push(asset);
    ${MAKE_OBJECT}
    scene.objects.push(make('er-box', 'crate', '', 400, 'Drift box'), make('er-logic', 'drifter', 'er-box', 0, 'Drifter'));
  `);

  const boxX = async () => (await object('er-box')).position.x;
  const startX = await boxX();
  await sleep(500);
  const idle = await json('__gm.editorRun()');
  check(
    'a placed behavior does not run outside play mode until it is asked to',
    idle.running === false && (await boxX()) === startX,
    `${JSON.stringify(idle)} x=${startX}`,
  );

  // 17b. The switch itself, through the inspector. It belongs with Enabled and above the
  //      VARIABLES section: it is a switch of the behavior, not something the behavior declares.
  await evaluate(
    `__gm.state.select({ kind: 'object', holderId: __gm.state.project.activeSceneId, objectId: 'er-logic' })`,
  );
  await sleep(200);
  const enabledBox = await json(`__gm.inspectorField('Enabled')`);
  const runBox = await json(`__gm.inspectorField('Run in editor')`);
  const variables = await json(`__gm.locate('VARIABLES')`);
  check(
    'the inspector offers the switch on a behavior object, with Enabled and above the variables',
    Boolean(runBox) &&
      Boolean(enabledBox) &&
      Boolean(variables) &&
      runBox.y > enabledBox.y &&
      runBox.y < variables.y,
    JSON.stringify({ enabledBox, runBox, variables }),
  );
  await click(runBox.x, runBox.y);

  const logic = await object('er-logic');
  check(
    'switching it on is an ordinary override on the object',
    logic.overrides.runInEditor === true,
    JSON.stringify(logic.overrides),
  );

  const running = await json('__gm.editorRun()');
  const mode = await evaluate('__gm.state.mode');
  check(
    'the behavior runs although Play was never pressed',
    running.running === true && running.behaviors.join() === 'er-logic' && mode === 'edit',
    `${JSON.stringify(running)} mode=${mode}`,
  );

  // 17c. It really drives its owner, and it is the stored scene object that moves – no runtime
  //      copy is involved here, which is the whole difference to playing.
  const before = await boxX();
  await sleep(600);
  const after = await boxX();
  check(
    'the owner drifts on, and the moved object is the stored one',
    after - before > DRIFT_PER_SECOND * 0.3 && (await evaluate('__gm.state.mode')) === 'edit',
    `x ${before} → ${after}`,
  );
  await shot('36-editor-run');

  // 17d. The point of this semantic: the change is a real edit, so it reaches the server.
  const first = await api(`projects/${projectId}`);
  await sleep(2000);
  const second = await api(`projects/${projectId}`);
  const savedX = second.project.assets.find((a) => a.type === 'scene').objects.find((o) => o.id === 'er-box')
    .position.x;
  check(
    'what the behavior moved is saved, not just shown',
    savedX > startX,
    `stored x=${savedX} (started at ${startX})`,
  );
  // A behavior writing every frame must not turn into a save per frame. That it saves at all is
  // the check above; this one is only about the ceiling – 60 frames a second would be ~120.
  const saves = second.revision - first.revision;
  check(
    'saving stays debounced while it runs, instead of once per frame',
    saves <= 6,
    `${saves} saves in 2 s`,
  );

  // 17e. Taking the switch back stops it again.
  await click(runBox.x, runBox.y);
  const stoppedAt = await boxX();
  await sleep(500);
  const stopped = await json('__gm.editorRun()');
  check(
    'taking the switch back stops the run and the object stands still',
    stopped.running === false && (await boxX()) === stoppedAt,
    `${JSON.stringify(stopped)} x=${stoppedAt}`,
  );

  // 17f. Undo covers the two clicks on the switch but nothing the behavior did while on. The first
  //      undo re-enables it, so it briefly runs again: undo rewinds the switch, never the clock.
  await undo();
  await undo();
  const afterUndo = await object('er-box');
  check(
    'undo takes back the switch, never the movement it caused',
    (await object('er-logic')).overrides.runInEditor === undefined &&
      afterUndo.position.x >= stoppedAt &&
      afterUndo.position.x > startX,
    `overrides=${JSON.stringify((await object('er-logic')).overrides)} x=${afterUndo.position.x}, started at ${startX}`,
  );

  // 17g. The case a real project has: the behavior sits inside a *placed container* – a level
  //      packed up once and dropped into the scene. The scene stores the container object alone,
  //      so this only works if the run resolves the template instead of expecting stored objects.
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    ${MAKE_OBJECT}
    p.assets.push({
      id: 'er-level',
      type: 'container',
      name: 'Editor level',
      props: { enabled: true },
      objects: [make('t-box', 'crate', '', 800), make('t-logic', 'drifter', 't-box', 0)],
    });
    const instance = make('er-inst', 'er-level', '', 0);
    instance.instanceEdits = { 't-logic': { position: {}, overrides: { runInEditor: true } } };
    scene.objects.push(instance);
  `);
  await sleep(600);

  const packedX = async () => (await object('er-inst~t-box')).position.x;
  const packedStart = await packedX();
  const packedRun = await json('__gm.editorRun()');
  await sleep(600);
  const packedNow = await packedX();
  check(
    'a behavior inside a placed container runs too, although the scene stores no object for it',
    packedRun.behaviors.includes('er-inst~t-logic') && packedNow - packedStart > DRIFT_PER_SECOND * 0.3,
    `${JSON.stringify(packedRun.behaviors)} x ${packedStart} → ${packedNow}`,
  );

  const stored = await json(`__gm.state.activeScene.objects.map((o) => o.id)`);
  const edits = await json(`__gm.state.activeScene.objects.find((o) => o.id === 'er-inst').instanceEdits`);
  const template = await json(
    `__gm.state.project.assets.find((a) => a.id === 'er-level').objects.find((o) => o.id === 't-box').position`,
  );
  check(
    'and what it moved is kept as an instance edit – the instance is not baked out, the template not touched',
    stored.includes('er-inst') &&
      !stored.some((id) => id.startsWith('er-inst~')) &&
      edits['t-box'].position.x > packedStart &&
      template.x === 0,
    `stored=${JSON.stringify(stored.filter((id) => id.startsWith('er-')))} edit.x=${edits['t-box']?.position?.x} template.x=${template.x}`,
  );

  // 17h. The keyboard. It is the editor's while the scene is on screen – a name being typed or the
  //      arrow keys walking the hierarchy must not steer a game at the same time. The game tab is
  //      where no key means anything to the editor, so that is where a behavior may have them.
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    const asset = structuredClone(p.assets.find((a) => a.id === 'drifter'));
    Object.assign(asset, { id: 'walker', name: 'Walker', graph: ${JSON.stringify(walkGraph)} });
    p.assets.push(asset);
    ${MAKE_OBJECT}
    scene.objects.push(
      make('er-walkbox', 'crate', '', 1200),
      Object.assign(make('er-walker', 'walker', 'er-walkbox', 0), { overrides: { runInEditor: true } }),
    );
  `);
  await sleep(600);

  const walkX = async () => (await object('er-walkbox')).position.x;
  const onScene = await json('__gm.editorRun()');
  const sceneBefore = await walkX();
  await holdKey('ArrowRight', 500);
  await sleep(200);
  check(
    'a key pressed while the scene is on screen belongs to the editor, not to the run',
    onScene.running === true &&
      onScene.keyboard === false &&
      (await json('__gm.tab()')) === 'scene' &&
      (await walkX()) === sceneBefore,
    `${JSON.stringify(onScene)} x=${sceneBefore} → ${await walkX()}`,
  );

  await showTab('game');
  // Clicking the view first: a checkbox left focused by an earlier check would still want the keys.
  const gameCentre = await json('__gm.gameCenter()');
  await click(gameCentre.x, gameCentre.y);
  const onGame = await json('__gm.editorRun()');
  const gameBefore = await walkX();
  await holdKey('ArrowRight', 500);
  await sleep(200);
  const gameAfter = await walkX();
  check(
    'in the game tab the same key reaches the behavior and the box walks',
    onGame.keyboard === true && gameAfter - gameBefore > WALK_PER_SECOND * 0.3,
    `${JSON.stringify(onGame)} x ${gameBefore} → ${gameAfter}`,
  );
  const caption = await json(`__gm.locate(${JSON.stringify(EDITOR_RUN_CAPTION)})`);
  check(
    'and the tab says so, instead of leaving the keyboard a guess',
    caption !== null,
    JSON.stringify(caption),
  );
  await shot('37-editor-run-keys');

  await showTab('scene');
  const backOnScene = await walkX();
  await holdKey('ArrowRight', 400);
  await sleep(200);
  check(
    'leaving the tab takes the keyboard back, and a key held across it does not stay held',
    (await json('__gm.editorRun()')).keyboard === false && (await walkX()) === backOnScene,
    `x=${backOnScene} → ${await walkX()}`,
  );

  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    scene.objects = scene.objects.filter((o) => !o.id.startsWith('er-'));
    p.assets = p.assets.filter((a) => !['drifter', 'walker', 'er-level'].includes(a.id));
  `);
  check(
    'the step leaves nothing of its own behind',
    (await json(`__gm.sceneObjects().filter((o) => o.id.startsWith('er-')).length`)) === 0 &&
      (await json('__gm.editorRun()')).running === false,
  );
}