import test from 'node:test';
import assert from 'node:assert/strict';

import { ResizeController } from '../test-build/resize-controller.js';
import { resolveSafeResize } from '../test-build/resize.js';

const room = () => ({
  id: 'room', wall_ids: ['w0', 'w1', 'w2', 'w3'],
  poly: [[100, 100], [400, 100], [400, 400], [100, 400]],
});
const options = { minDim: 25, eps: 0.5, step: 5 };

const setup = () => {
  const controller = new ResizeController();
  const rooms = [room()];
  const resolution = resolveSafeResize(rooms, [], 'room', 1, options);
  assert.equal(resolution.enabled, true);
  const beforeWalls = [{ cm: 0 }, { cm: 15 }, { cm: 15 }];
  assert.equal(controller.begin({
    pointerId: 7,
    start: [400, 250],
    roomId: 'room',
    plan: resolution.plan,
    options,
    rooms,
    openings: [],
    snapshotIdentity: 'snapshot-a',
    before: { id: 'before' },
    wallUnionBefore: { path: 'old' },
  }), true);
  return { controller, beforeWalls };
};

const move = (controller, beforeWalls, overrides = {}) => controller.move({
  pointerId: 7,
  point: [450, 250],
  step: 5,
  snap: (point) => point,
  project: (_snapshot, polys) => ({
    ok: true,
    value: {
      preview: { polys }, beforeWalls, afterWalls: [...beforeWalls], artifact: { path: 'new' },
    },
  }),
  publish: () => {},
  measure: () => ['50 cm'],
  ...overrides,
});

test('#264 controller owns latent selection and bounded eligibility cache', () => {
  const controller = new ResizeController();
  controller.selectRoom('room');
  assert.equal(controller.escapeIdle(), 'selection-cleared');
  assert.equal(controller.escapeIdle(), 'exit-tool');
  let calls = 0;
  const resolution = { enabled: false, reason: 'diagonal' };
  assert.equal(controller.resolve('a', 'room:0', () => (++calls, resolution)), resolution);
  assert.equal(controller.resolve('a', 'room:0', () => (++calls, resolution)), resolution);
  assert.equal(calls, 1);
  controller.resolve('b', 'room:0', () => (++calls, resolution));
  assert.equal(calls, 2);
});

test('#264 accepted preview commits once and late/wrong pointer events are no-ops', () => {
  const { controller, beforeWalls } = setup();
  assert.deepEqual(move(controller, beforeWalls, { pointerId: 99 }), { kind: 'no-op' });
  const accepted = move(controller, beforeWalls);
  assert.equal(accepted.kind, 'accepted');
  assert.deepEqual(controller.liveLabels, ['50 cm']);
  const done = controller.finish({
    pointerId: 7,
    currentSnapshotIdentity: 'snapshot-a',
    validatePreview: () => true,
  });
  assert.equal(done.kind, 'commit');
  assert.deepEqual(done.before, { id: 'before' });
  assert.deepEqual(controller.finish({
    pointerId: 7, currentSnapshotIdentity: 'snapshot-a', validatePreview: () => true,
  }), { kind: 'no-op' });
});

test('#264 failed projection retains the last complete preview and notifies once', () => {
  const { controller, beforeWalls } = setup();
  const accepted = move(controller, beforeWalls);
  assert.equal(accepted.kind, 'accepted');
  const preview = controller.preview;
  const labels = controller.liveLabels;
  const fail = { project: () => ({ ok: false, reason: 'wall-metadata' }) };
  assert.deepEqual(move(controller, beforeWalls, { point: [460, 250], ...fail }), {
    kind: 'rejected', notify: true,
  });
  assert.equal(controller.preview, preview);
  assert.equal(controller.liveLabels, labels);
  assert.deepEqual(move(controller, beforeWalls, { point: [460, 250], ...fail }), {
    kind: 'rejected', notify: false,
  });
});

test('#264 exact wall profile fails closed on preview and is rechecked on finish', () => {
  const first = setup();
  assert.deepEqual(move(first.controller, first.beforeWalls, {
    project: (_snapshot, polys) => ({
      ok: true,
      value: {
        preview: { polys }, beforeWalls: first.beforeWalls,
        afterWalls: [{ cm: 0 }, { cm: 15 }], artifact: null,
      },
    }),
  }), { kind: 'rejected', notify: true });
  assert.equal(first.controller.preview, null);

  const second = setup();
  const afterWalls = [...second.beforeWalls];
  assert.equal(move(second.controller, second.beforeWalls, {
    project: (_snapshot, polys) => ({
      ok: true,
      value: { preview: { polys }, beforeWalls: second.beforeWalls, afterWalls, artifact: null },
    }),
  }).kind, 'accepted');
  afterWalls.pop();
  assert.deepEqual(second.controller.finish({
    pointerId: 7,
    currentSnapshotIdentity: 'snapshot-a',
    validatePreview: () => true,
  }), { kind: 'rejected', reason: 'wall-records' });
});

test('#264 cancel restores retained masonry only for the same snapshot', () => {
  const same = setup().controller;
  assert.deepEqual(same.cancel('snapshot-a'), {
    kind: 'cancelled', restoreWallUnion: { path: 'old' },
  });
  assert.deepEqual(same.cancel('snapshot-a'), { kind: 'no-op' });
  const stale = setup().controller;
  assert.deepEqual(stale.cancel('snapshot-b'), {
    kind: 'cancelled', restoreWallUnion: null,
  });
});