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

/**
 * The auto-repeat of `On key down`: a held key fires again after a delay and then on its own
 * interval, which is what lets a Tetris piece slide sideways on one press.
 *
 * The step brings its own box and behavior with *two* `On key down` nodes on the same key – one
 * plain, one repeating. One hold then measures both at once, so "it repeated" cannot be confused
 * with "the key arrived more often than expected". Everything it adds is removed again at the end.
 */

const PLAIN = 'plain hit';
const REPEATING = 'repeating hit';
const DELAY = 300;
const INTERVAL = 50;

const repeatGraph = {
  nodes: [
    node('r-plain', 'OnKeyDown', 0, 0, { key: 'ArrowRight' }),
    node('r-plain-log', 'Log', 340, 0, { message: PLAIN }),
    node('r-repeat', 'OnKeyDown', 0, 220, {
      key: 'ArrowRight',
      repeatAfter: DELAY,
      repeatInterval: INTERVAL,
    }),
    node('r-repeat-log', 'Log', 340, 220, { message: REPEATING }),
  ],
  edges: [
    edge('r-e1', 'r-plain', 'exec', 'r-plain-log', 'exec'),
    edge('r-e2', 'r-repeat', 'exec', 'r-repeat-log', 'exec'),
  ],
};

export async function keyRepeat(t) {
  const { check, sleep, json, shot, click, holdKey, world, mutate, stop, select, typeText } = t;
  /** Both counts out of one read of the world, so the two are always of the same moment. */
  const hits = async () => {
    const log = (await world()).log;
    const count = (message) => log.filter((line) => line.includes(message)).length;
    return { plain: count(PLAIN), repeating: count(REPEATING) };
  };

  // 20a. A box with the two-node behavior below it, written into the model directly: what is under
  //      test is the repeat, not another way of building a graph.
  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    const proto = scene.objects[0];
    const a = structuredClone(p.assets.find((x) => x.id === 'mover'));
    Object.assign(a, {
      id: 'repeater',
      name: 'Repeater',
      props: { enabled: true, runInEditor: false },
      variables: [],
      graph: ${JSON.stringify(repeatGraph)},
    });
    p.assets.push(a);
    const make = (id, assetId, parentId, y) => {
      const o = structuredClone(proto);
      Object.assign(o, {
        id,
        assetId,
        name: id === 'r-box' ? 'Repeat box' : 'Repeater',
        position: { x: 0, y, z: 0 },
        parentId,
        overrides: {},
        instanceEdits: {},
      });
      return o;
    };
    scene.objects.push(make('r-box', 'crate', '', -300), make('r-logic', 'repeater', 'r-box', 0));
  `);
  await sleep(400);

  await t.play();
  await sleep(300);

  // 20b. A hold shorter than the delay is still just a press. Without this the check below would
  //      also pass on a node that simply fires every frame the key is down.
  const beforeShort = await hits();
  await holdKey('ArrowRight', 120);
  await sleep(200);
  const afterShort = await hits();
  check(
    'a hold shorter than the delay fires once, repeat or not',
    afterShort.plain === beforeShort.plain + 1 && afterShort.repeating === beforeShort.repeating + 1,
    `plain ${beforeShort.plain} → ${afterShort.plain}, repeating ${beforeShort.repeating} → ${afterShort.repeating} over 120 ms with a ${DELAY} ms delay`,
  );

  // 20c. Hold it past the delay: the plain node still counts one press, the repeating one runs.
  await holdKey('ArrowRight', 800);
  await sleep(200);
  const afterLong = await hits();
  const gained = afterLong.repeating - afterShort.repeating;
  check(
    'holding past the delay keeps the repeating node firing, while the plain one counts one press',
    afterLong.plain === afterShort.plain + 1 && gained > 4 && gained < 25,
    `plain +${afterLong.plain - afterShort.plain}, repeating +${gained} over 800 ms (press + ~${Math.round((800 - DELAY) / INTERVAL)} repeats expected)`,
  );
  await stop();
  await sleep(300);

  // 20d. Both settings are on the node itself, so a graph can be tuned where it is built.
  await select({ kind: 'node', assetId: 'repeater', nodeId: 'r-repeat' });
  await sleep(300);
  const afterField = await json(`__gm.inspectorField('Repeat after (ms)')`);
  const intervalField = await json(`__gm.inspectorField('Repeat interval (ms)')`);
  check(
    'the node inspector offers the delay and the interval',
    afterField !== null && intervalField !== null,
    JSON.stringify({ afterField, intervalField }),
  );

  // A switched-off repeat is worth no rows: two lines of "0" on every key node would make each
  // one taller for nothing. The repeating node next to it shows both, so this is not just hiding.
  const plainRows = await json(`__gm.graph.nodeSettings('r-plain')`);
  const repeatRows = await json(`__gm.graph.nodeSettings('r-repeat')`);
  check(
    'a node with no repeat set carries no repeat rows, the repeating one carries both',
    plainRows.length === 1 &&
      repeatRows.length === 3 &&
      repeatRows.some((r) => r.startsWith('Repeat after')) &&
      repeatRows.some((r) => r.startsWith('Repeat interval')),
    JSON.stringify({ plainRows, repeatRows }),
  );
  await shot('40-key-repeat-node');

  await click(afterField.x, afterField.y);
  await typeText('750');
  await click(intervalField.x, intervalField.y);
  await sleep(200);
  const params = await json(
    `__gm.state.project.assets.find((a) => a.id === 'repeater').graph.nodes.find((n) => n.id === 'r-repeat').params`,
  );
  check(
    'typing a new delay lands on the node',
    params.repeatAfter === 750 && params.repeatInterval === INTERVAL,
    JSON.stringify(params),
  );

  // 20e. The typed value is what the next run obeys: 750 ms is longer than this hold, so the
  //      repeating node falls silent although nothing else about the graph changed.
  await t.play();
  await sleep(300);
  const beforeTuned = await hits();
  await holdKey('ArrowRight', 500);
  await sleep(200);
  const afterTuned = await hits();
  check(
    'the delay typed into the inspector is the one the run uses',
    afterTuned.repeating === beforeTuned.repeating + 1,
    `repeating ${beforeTuned.repeating} → ${afterTuned.repeating} over 500 ms with the delay raised to 750 ms`,
  );
  await stop();
  await sleep(300);

  await mutate(`
    const p = __gm.state.project;
    const scene = __gm.state.activeScene;
    scene.objects = scene.objects.filter((o) => o.id !== 'r-box' && o.id !== 'r-logic');
    p.assets = p.assets.filter((a) => a.id !== 'repeater');
  `);
  await sleep(300);
  check(
    'the step leaves nothing of its own behind',
    (await json(`__gm.sceneObjects().filter((o) => o.id.startsWith('r-')).length`)) === 0,
  );
}