import test from 'node:test';
import assert from 'node:assert/strict';
import {
  TRAINING_CONSENT_VERSION,
  addContribution,
  consentTerms,
  contributionEligibility,
  contributionForEntry,
  defaultContributionState,
  derivedArtifacts,
  receiptPreview,
  withdrawContribution,
} from '../src/training-contribution.js';

// Issue #24 — contributing a photo to Timmy's training corpus is a separate decision from saving
// a log. Nothing here is transmitted: the receipt is what a person could carry to a corpus pipeline
// later, and the withdrawal tombstone is what names the artifacts a deletion has to reach.

const PHOTO = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+ip1sAAAAASUVORK5CYII=';
const entry = (overrides = {}) => ({
  id: 'log-1',
  occurredAt: '2026-10-14T07:20:00.000Z',
  bristolType: 4,
  color: 'brown',
  urgency: 1,
  discomfort: 0,
  note: 'after lunch',
  photoDataUrl: PHOTO,
  symptoms: { blood: false },
  ...overrides,
});
const preview = (target = entry(), id = 'contrib-1') => receiptPreview(target, {
  contributionId: id,
  consentedAt: '2026-10-21T10:00:00.000Z',
});

test('saving a journal entry contributes nothing by default', () => {
  assert.deepEqual(defaultContributionState(), { optedIn: false, receipt: null });
});

test('an entry with no saved photo bytes cannot be contributed', () => {
  const unavailable = contributionEligibility(entry({ photoDataUrl: '' }));
  assert.equal(unavailable.eligible, false);
  assert.match(unavailable.reason, /no saved photo/i);
  assert.equal(contributionEligibility(entry()).eligible, true);
});

test('the consent terms name the version and what is never shared', () => {
  const terms = consentTerms();

  assert.equal(terms.version, TRAINING_CONSENT_VERSION);
  assert.match(terms.version, /^training-consent-/);
  assert.ok(terms.includes.some(item => /photo/i.test(item)));
  assert.ok(terms.excludes.some(item => /note/i.test(item)));
  assert.ok(terms.excludes.some(item => /symptom/i.test(item)));
  // This build is honest about transport: a receipt is queued on the device, not uploaded.
  assert.match(terms.transport, /nothing is uploaded/i);
});

test('the receipt shown before consent carries the version, the id, and no free text from the log', () => {
  const receipt = preview();

  assert.equal(receipt.contributionId, 'contrib-1');
  assert.equal(receipt.consentVersion, TRAINING_CONSENT_VERSION);
  assert.equal(receipt.consentedAt, '2026-10-21T10:00:00.000Z');
  assert.deepEqual(receipt.labels, { bristolType: 4, color: 'brown' });
  assert.equal(receipt.state, 'queued-local');
  // The confirmed note and symptom flags stay in the journal; they are not part of a contribution.
  const serialized = JSON.stringify(receipt);
  assert.equal(serialized.includes('after lunch'), false);
  assert.equal(serialized.includes('"blood"'), false);
  assert.equal(serialized.includes('data:image'), false);
});

test('a receipt cannot be recorded without the current consent version', () => {
  assert.throws(
    () => addContribution([], { ...preview(), consentVersion: 'training-consent-v0' }),
    /consent version/i,
  );
});

test('recording a contribution returns a new list and leaves the ledger it was given alone', () => {
  const before = [];
  const after = addContribution(before, preview());

  assert.equal(before.length, 0);
  assert.equal(after.length, 1);
  assert.equal(after[0].contributionId, 'contrib-1');
  assert.equal(contributionForEntry(after, 'log-1')?.contributionId, 'contrib-1');
});

test('the same log cannot be contributed twice while its receipt is still active', () => {
  const first = addContribution([], preview());
  const second = addContribution(first, preview(entry(), 'contrib-2'));

  assert.equal(second.length, 1);
  assert.equal(second[0].contributionId, 'contrib-1');
});

test('withdrawal keeps a tombstone that names every derived artifact by contribution id', () => {
  const contributions = addContribution([], preview());
  const artifacts = derivedArtifacts(contributions[0]);

  const { contributions: after, tombstone } = withdrawContribution(
    contributions, 'contrib-1', '2026-10-21T11:00:00.000Z',
  );

  assert.equal(after[0].state, 'withdrawn');
  assert.equal(after[0].withdrawnAt, '2026-10-21T11:00:00.000Z');
  assert.equal(tombstone.contributionId, 'contrib-1');
  assert.deepEqual(
    tombstone.artifacts.map(artifact => artifact.artifact).sort(),
    artifacts.map(artifact => artifact.artifact).sort(),
  );
  for (const artifact of tombstone.artifacts) {
    assert.equal(artifact.contributionId, 'contrib-1');
    assert.equal(artifact.state, 'withdrawn');
  }
});

test('the derived artifacts are the image bytes and the confirmed label, addressed by contribution id', () => {
  const artifacts = derivedArtifacts(preview());

  assert.deepEqual(artifacts.map(artifact => artifact.artifact).sort(), ['confirmed-label', 'raw-image']);
  for (const artifact of artifacts) {
    assert.equal(artifact.contributionId, 'contrib-1');
    assert.equal(artifact.state, 'active');
  }
});

test('withdrawing one contribution never touches another receipt', () => {
  const list = [
    ...addContribution([], preview()),
    ...addContribution([], preview(entry({ id: 'log-2' }), 'contrib-2')),
  ];

  const { contributions: after } = withdrawContribution(list, 'contrib-1', '2026-10-21T11:00:00.000Z');

  assert.equal(after.find(item => item.contributionId === 'contrib-1').state, 'withdrawn');
  assert.equal(after.find(item => item.contributionId === 'contrib-2').state, 'queued-local');
});

test('withdrawing an unknown contribution id changes nothing and reports no tombstone', () => {
  const list = addContribution([], preview());
  const { contributions: after, tombstone } = withdrawContribution(list, 'missing', '2026-10-21T11:00:00.000Z');

  assert.equal(after, list);
  assert.equal(tombstone, null);
});

test('a withdrawn log can be contributed again under a fresh receipt', () => {
  const { contributions: withdrawn } = withdrawContribution(
    addContribution([], preview()), 'contrib-1', '2026-10-21T11:00:00.000Z',
  );

  const again = addContribution(withdrawn, preview(entry(), 'contrib-2'));

  assert.equal(again.length, 2);
  assert.equal(contributionForEntry(again, 'log-1').contributionId, 'contrib-2');
  assert.equal(contributionForEntry(again, 'log-1').state, 'queued-local');
});