/**
 * Steps 17–20 each need the same throwaway rig in the fixture scene: a behavior asset cloned off
 * `mover` carrying the step's own graph, a crate to hold it, and a logic child that runs it.
 * Spelled out per step it drifted four ways – `push` vs `unshift`, three different `make`
 * signatures, and y-offsets nothing kept apart.
 */

/**
 * Where each step parks its box. The fixture scene is shared, so two steps at the same y would
 * overlap and each would fail for reasons belonging to the other.
 */
export const LANES = {
  editorRun: 400,
  editorRunContainer: 800,
  editorRunEdits: 1200,
  pause: 300,
  nested: 700,
  keyRepeat: -300,
};

/**
 * Source for a `make(id, assetId, parentId, y, name)` factory, to paste inside a `mutate()`
 * string. It clones `scene.objects[0]`, so a new object carries whatever shape the fixture has.
 */
export const MAKE_OBJECT = `
    const make = (id, assetId, parentId, y, name = '') => {
      const o = structuredClone(scene.objects[0]);
      Object.assign(o, {
        id,
        assetId,
        name,
        position: { x: 0, y, z: 0 },
        parentId,
        overrides: {},
        instanceEdits: {},
      });
      return o;
    };`;

/**
 * Builds the rig and hands back the ids it created, plus `remove()` which takes them out again
 * and returns what is left – so a step's cleanup cannot fall out of step with what it made.
 *
 * `front` puts the asset at the head of the project list: the asset panel is long by this point
 * in the suite, and a row appended at the end scrolls out of reach of `dragAsset`.
 */
export async function scaffoldBehavior(t, options) {
  const {
    assetId,
    name,
    graph,
    boxId,
    boxName = 'Box',
    logicId,
    y,
    front = false,
    props = { enabled: true, runInEditor: false },
  } = options;

  await t.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: ${JSON.stringify(assetId)},
      name: ${JSON.stringify(name)},
      props: ${JSON.stringify(props)},
      variables: [],
      graph: ${JSON.stringify(graph)},
    });
    p.assets.${front ? 'unshift' : 'push'}(asset);
    ${MAKE_OBJECT}
    scene.objects.push(
      make(${JSON.stringify(boxId)}, 'crate', '', ${y}, ${JSON.stringify(boxName)}),
      make(${JSON.stringify(logicId)}, ${JSON.stringify(assetId)}, ${JSON.stringify(boxId)}, 0, ${JSON.stringify(name)}),
    );
  `);
  await t.sleep(400);

  return {
    assetId,
    boxId,
    logicId,
    /** Removes everything this rig added and reports what survived (should be all zeroes). */
    async remove() {
      await t.evaluate('__gm.state.select(null)');
      await t.mutate(`
        const p = __gm.state.project;
        const scene = __gm.state.activeScene;
        const objects = ${JSON.stringify([boxId, logicId])};
        const assets = ${JSON.stringify([assetId])};
        scene.objects = scene.objects.filter((o) => !objects.includes(o.id));
        p.assets = p.assets.filter((a) => !assets.includes(a.id));
      `);
      await t.sleep(300);
      return t.json(`{
        objects: __gm.sceneObjects().filter((o) => ${JSON.stringify([boxId, logicId])}.includes(o.id)).length,
        assets: __gm.state.project.assets.filter((a) => a.id === ${JSON.stringify(assetId)}).length,
      }`);
    },
  };
}