import test from 'node:test';
import assert from 'node:assert/strict';
import { world, sleep } from './world.mjs';
import { FakeVikunja } from '../src/fake.mjs';
const ready = async (t, edit) => {
  const w = await world(t, edit);
  await w.adapter.start('demo');
  assert.equal(w.adapter.status()[0].state, 'ready');
  return w;
};
const allowed = (w, action) => w.events('action.allowed').filter((e) => e.body.action === action);
const refusedWith = (code) => (e) => e.code === code;
// A pm-created task, returned with its ref and digest.
const task = async (w, args = {}) => {
  const pm = w.caps.pm ?? w.agent('pm');
  return w.call(pm, 'task.create', { title: 'a task', request: w.instruction(), requirement: 'REQ-S-1', ...args });
};
test('task.create needs a recorded human request and a requirement id', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const args = { title: 'x', request: w.instruction(), requirement: 'REQ-S-1' };
  await assert.rejects(w.call(pm, 'task.create', { ...args, request: 'not-an-event' }), refusedWith('request-not-found'));
  await assert.rejects(w.call(pm, 'task.create', { ...args, requirement: 'S-1' }), refusedWith('invalid-request'));
  await assert.rejects(w.call(pm, 'task.create', { title: 'x', request: args.request }), refusedWith('invalid-request'));
  await assert.rejects(w.call(pm, 'task.create', { ...args, title: '   ' }), refusedWith('invalid-request'));
  assert.equal(allowed(w, 'task.create').length, 0);
  const r = await w.call(pm, 'task.create', { ...args, due_date: '2026-11-01T00:00:00.000Z', priority: 3, labels: [w.label] });
  assert.equal(r.task_ref, `vikunja:${w.project}/1`);
  const created = w.events('task.created');
  assert.equal(created.length, 1);
  assert.deepEqual(created[0].body, { request: args.request, requirement: 'REQ-S-1' });
  assert.equal(created[0].actor_role, 'pm');
  const [s] = w.snapshots(r.task_ref);
  assert.equal(s.source, 'self');
  assert.equal(s.digest, r.digest);
  assert.deepEqual(
    { ...s.fields },
    {
      project_id: w.project,
      title: 'x',
      description: '',
      done: false,
      due_date: '2026-11-01T00:00:00.000Z',
      priority: 3,
      percent_done: 0,
      bucket: w.installed.buckets.todo,
      labels: [w.label],
      assignees: [],
    },
  );
  assert.equal(allowed(w, 'task.create').length, 1);
});
test('only labels named in the business file can be written', async (t) => {
  const w = await ready(t);
  // The pm can see this label in Vikunja (its owner created it), but the business file doesn't list it.
  const other = w.fake.label('launchpad', w.owner);
  const pm = w.agent('pm');
  const before = w.fake.requests.length;
  await assert.rejects(task(w, { labels: [other] }), refusedWith('label-not-allowed'));
  const { task_ref } = await task(w);
  await assert.rejects(w.call(pm, 'task.schedule', { task_ref, labels: { add: [other] } }), refusedWith('label-not-allowed'));
  assert.equal(w.fake.requests.slice(before).filter((r) => r.path.endsWith('/labels')).length, 0);
  await w.call(pm, 'task.schedule', { task_ref, labels: { add: [w.label] } });
  assert.deepEqual(w.fake.task(1).labels, [w.label]);
  await w.call(pm, 'task.schedule', { task_ref, labels: { remove: [w.label] } });
  assert.deepEqual(w.fake.task(1).labels, []);
});
test('task.schedule sets and clears a due date and relations', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const a = await task(w);
  const b = await task(w, { title: 'b', relations: [{ kind: 'blocking', task_ref: a.task_ref }] });
  assert.deepEqual(w.fake.task(2).relations, [{ kind: 'blocking', other: 1 }]);
  await w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: '2026-12-24T12:00:00.000Z' });
  assert.equal(w.snapshots(a.task_ref).at(-1).fields.due_date, '2026-12-24T12:00:00.000Z');
  await w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: null });
  assert.equal(w.snapshots(a.task_ref).at(-1).fields.due_date, null);
  assert.equal(w.fake.task(1).due, null);
  await w.call(pm, 'task.schedule', { task_ref: b.task_ref, relations: { remove: [{ kind: 'blocking', task_ref: a.task_ref }] } });
  assert.deepEqual(w.fake.task(2).relations, []);
  await assert.rejects(w.call(pm, 'task.schedule', { task_ref: a.task_ref }), refusedWith('invalid-request'));
  await assert.rejects(
    w.call(pm, 'task.schedule', { task_ref: a.task_ref, relations: { add: [{ kind: 'blocking', task_ref: 'vikunja:99/1' }] } }),
    refusedWith('task-project'),
  );
  await assert.rejects(w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: '2026-12-24' }), refusedWith('invalid-request'));
});
test('assign and reassign move the role bots and record task.assigned', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const coder = w.agent('coder');
  const { task_ref } = await task(w);
  // The field-writer check runs before authority, so the refused call consumes nothing.
  await assert.rejects(w.call(coder, 'task.assign', { task_ref, role: 'coder' }), refusedWith('field-writer'));
  assert.equal(allowed(w, 'task.assign').length, 0);
  await assert.rejects(w.call(pm, 'task.assign', { task_ref, role: 'cto' }), refusedWith('unknown-role'));
  await assert.rejects(w.call(pm, 'task.assign', { task_ref, role: 'toString' }), refusedWith('unknown-role'));
  await assert.rejects(w.call(pm, 'task.reassign', { task_ref, role: 'coder' }), refusedWith('task-unassigned'));
  await w.call(pm, 'task.assign', { task_ref, role: 'coder' });
  assert.deepEqual(w.fake.task(1).assignees, [w.bots.coder]);
  await assert.rejects(w.call(pm, 'task.assign', { task_ref, role: 'reviewer' }), refusedWith('task-assigned'));
  await assert.rejects(w.call(pm, 'task.reassign', { task_ref, role: 'coder' }), refusedWith('task-assigned'));
  // A person assigned in the UI stays assigned; only the role bots move.
  await w.ui('POST', '/tasks/1/assignees', { user_id: w.owner });
  await sleep(20);
  await w.adapter.tick('demo');
  await w.call(pm, 'task.reassign', { task_ref, role: 'reviewer' });
  assert.deepEqual(w.fake.task(1).assignees.sort(), [w.owner, w.bots.reviewer].sort());
  assert.deepEqual(
    w.events('task.assigned').map((e) => e.body),
    [
      { role: 'coder', previous: [] },
      { role: 'reviewer', previous: ['coder'] },
    ],
  );
});
test('task.update.assigned is for the assignee and records task.state', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const coder = w.agent('coder');
  const reviewer = w.agent('reviewer');
  const { task_ref } = await task(w);
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref, state: 'in-progress' }), refusedWith('not-assigned'));
  await w.call(pm, 'task.assign', { task_ref, role: 'coder' });
  await assert.rejects(w.call(reviewer, 'task.update.assigned', { task_ref, state: 'in-progress' }), refusedWith('not-assigned'));
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref, state: 'done' }), refusedWith('invalid-state'));
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref, percent_done: 2 }), refusedWith('invalid-request'));
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref }), refusedWith('invalid-request'));
  const r = await w.call(coder, 'task.update.assigned', { task_ref, state: 'in-progress', percent_done: 0.5, comment: 'started' });
  assert.equal(w.fake.task(1).buckets.get(w.installed.view), w.installed.buckets['in-progress']);
  assert.equal(w.fake.task(1).percent, 0.5);
  assert.equal(w.fake.task(1).comments[0].comment, 'started');
  const [state] = w.events('task.state');
  assert.deepEqual(state.body, { role: 'coder', state: 'in-progress', previous: 'todo', percent_done: 0.5, comment: true });
  assert.equal(state.actor_role, 'coder');
  // The comment text stays in the tracker.
  assert.ok(!JSON.stringify(w.store.all('SELECT * FROM events')).includes('started'));
  assert.equal(w.snapshots(task_ref).at(-1).digest, r.digest);
  // The poll sees the same state and a bot's comment, so nothing is external.
  await sleep(20);
  await w.adapter.tick('demo');
  assert.equal(w.events('task.changed.external').filter((e) => e.subject === task_ref).length, 0);
});
test('a wrong expected digest records task.conflict and writes nothing', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const created = await task(w);
  await w.ui('PATCH', '/tasks/1', { title: 'renamed by a person' });
  const before = w.fake.requests.length;
  await assert.rejects(
    w.call(pm, 'task.priority.change', { task_ref: created.task_ref, priority: 4, expect: created.digest }),
    refusedWith('task-conflict'),
  );
  assert.equal(w.fake.requests.slice(before).filter((r) => r.method !== 'GET').length, 0);
  const [c] = w.events('task.conflict');
  assert.equal(c.subject, created.task_ref);
  assert.equal(c.body.expected, created.digest);
  assert.notEqual(c.body.actual, created.digest);
  await assert.rejects(w.call(pm, 'task.assign', { task_ref: created.task_ref, role: 'coder', expect: 'x' }), refusedWith('invalid-request'));
  await w.call(pm, 'task.assign', { task_ref: created.task_ref, role: 'coder', expect: c.body.actual });
});
test('a cross-role verb needs a resolved decision, used once', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const cto = w.agent('cto');
  const { task_ref } = await task(w);
  await assert.rejects(w.call(pm, 'task.priority.change', { task_ref, priority: 5 }), refusedWith('decision-required'));
  const d = w.broker.request(pm, {
    verb: 'decision.raise',
    args: {
      action: 'task.priority.change',
      domain: 'technical',
      target: task_ref,
      task_ref,
      question: 'raise to 5?',
      options: [
        { key: 'yes', text: 'yes' },
        { key: 'no', text: 'no' },
      ],
      recommendation: 'yes',
      blocking: false,
    },
  });
  await assert.rejects(w.call(pm, 'task.priority.change', { task_ref, priority: 5, decision: d.id }), refusedWith('decision-not-approved'));
  w.broker.request(cto, { verb: 'decision.resolve', args: { id: d.id, choice: 'yes' } });
  await w.call(pm, 'task.priority.change', { task_ref, priority: 5, decision: d.id });
  assert.equal(w.fake.task(1).priority, 5);
  await assert.rejects(w.call(pm, 'task.priority.change', { task_ref, priority: 1, decision: d.id }), refusedWith('decision-consumed'));
  // The scope change is cross-role for the pm too.
  await assert.rejects(w.call(pm, 'task.scope.change', { task_ref, title: 'new' }), refusedWith('decision-required'));
});
test('task.close needs a verdict; after it every verb refuses with task-done', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const coder = w.agent('coder');
  const { task_ref } = await task(w);
  await w.call(pm, 'task.assign', { task_ref, role: 'coder' });
  await assert.rejects(w.call(pm, 'task.close', { task_ref }), refusedWith('invalid-request'));
  await assert.rejects(w.call(coder, 'task.close', { task_ref, verdict: 'queue:38' }), refusedWith('field-writer'));
  await w.call(pm, 'task.close', { task_ref, verdict: 'queue:38' });
  assert.equal(w.fake.task(1).done, true);
  assert.deepEqual(w.events('task.closed')[0].body, { verdict: 'queue:38' });
  assert.deepEqual(w.broker.taskView('demo', 'open'), []);
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref, percent_done: 1 }), refusedWith('task-done'));
  await assert.rejects(w.call(pm, 'task.close', { task_ref, verdict: 'again' }), refusedWith('task-done'));
});
test('a lost answer is settled by a re-read and never retried', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const coder = w.agent('coder');
  const { task_ref } = await task(w);
  await w.call(pm, 'task.assign', { task_ref, role: 'coder' });
  const moves = () => w.fake.requests.filter((r) => r.method === 'PUT').length;
  // The move landed but the answer was a 500: the re-read shows it, so the verb succeeds.
  w.fake.fault('PUT', /\/buckets\/\d+\/tasks$/, 500, { apply: true });
  await w.call(coder, 'task.update.assigned', { task_ref, state: 'in-progress' });
  assert.equal(moves(), 1);
  assert.equal(w.events('task.state').length, 1);
  // The move didn't land: write-uncertain, a snapshot of what the tracker holds, and no event.
  w.fake.fault('PUT', /\/buckets\/\d+\/tasks$/, 500);
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref, state: 'blocked' }), refusedWith('write-uncertain'));
  assert.equal(moves(), 2);
  assert.equal(w.events('task.state').length, 1);
  assert.equal(w.snapshots(task_ref).at(-1).fields.bucket, w.installed.buckets['in-progress']);
  // A network error leaves the outcome unknown too.
  w.fake.fault('PATCH', /^\/tasks\/1$/, 0);
  await assert.rejects(w.call(coder, 'task.update.assigned', { task_ref, percent_done: 0.9 }), refusedWith('write-uncertain'));
});
test('a create whose answer is lost is reported uncertain, and the poll finds the task', async (t) => {
  const w = await ready(t);
  w.agent('pm');
  w.fake.fault('POST', /^\/projects\/\d+\/tasks$/, 0);
  await assert.rejects(task(w), refusedWith('write-uncertain'));
  assert.equal(w.fake.task(1), undefined);
  w.fake.fault('POST', /^\/projects\/\d+\/tasks$/, 502, { apply: true });
  await assert.rejects(task(w), refusedWith('write-uncertain'));
  assert.equal(w.events('task.created').length, 0);
  await sleep(20);
  await w.adapter.tick('demo');
  const [e] = w.events('task.changed.external');
  assert.equal(e.subject, `vikunja:${w.project}/1`);
  assert.equal(e.body.previous, null);
});
test('a task the sync bot cannot read refuses and records nothing', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  await assert.rejects(w.call(pm, 'task.assign', { task_ref: `vikunja:${w.project}/77`, role: 'coder' }), refusedWith('task-not-found'));
  await assert.rejects(w.call(pm, 'task.assign', { task_ref: 'vikunja:99/1', role: 'coder' }), refusedWith('task-project'));
  await assert.rejects(w.call(pm, 'task.assign', { task_ref: 'nope', role: 'coder' }), refusedWith('invalid-request'));
  const other = w.fake.project('Launchpad', w.owner);
  await task(w);
  w.fake.moveToProject(1, other);
  await assert.rejects(w.call(pm, 'task.assign', { task_ref: `vikunja:${w.project}/1`, role: 'coder' }), refusedWith('tracker-forbidden'));
  assert.equal(allowed(w, 'task.assign').length, 0);
});
test('verbs and polls for one business run one at a time', async (t) => {
  let inflight = 0,
    most = 0,
    w;
  w = await world(t, {
    fetch: async (...a) => {
      inflight++;
      most = Math.max(most, inflight);
      await sleep(2);
      try {
        return await w.fake.fetch(...a);
      } finally {
        inflight--;
      }
    },
  });
  await w.adapter.start('demo');
  const pm = w.agent('pm');
  const { task_ref } = await task(w);
  await Promise.all([
    w.call(pm, 'task.schedule', { task_ref, labels: { add: [w.label] } }),
    w.call(pm, 'task.assign', { task_ref, role: 'coder' }),
    w.adapter.tick('demo'),
  ]);
  assert.equal(most, 1);
  assert.deepEqual(w.fake.task(1).labels, [w.label]);
  assert.deepEqual(w.fake.task(1).assignees, [w.bots.coder]);
});
// Vikunja keeps due dates to the second (review r1, B1). The adapter drops the milliseconds before it
// writes, so its own snapshot, the digest it returns and the next poll all agree.
test('a due date with milliseconds is written to the second', async (t) => {
  const w = await ready(t);
  const pm = w.agent('pm');
  const a = await task(w, { due_date: '2026-11-01T00:00:00.789Z' });
  assert.equal(w.fake.task(1).due, '2026-11-01T00:00:00Z');
  assert.equal(w.snapshots(a.task_ref).at(-1).fields.due_date, '2026-11-01T00:00:00.000Z');
  const r = await w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: '2026-12-01T09:00:00.456Z' });
  assert.equal(w.fake.task(1).due, '2026-12-01T09:00:00Z');
  const s = w.snapshots(a.task_ref).at(-1);
  assert.equal(s.fields.due_date, '2026-12-01T09:00:00.000Z');
  assert.equal(s.digest, r.digest);
  await sleep(20);
  assert.deepEqual(await w.adapter.tick('demo'), { snapshots: 0, events: 0 });
  const patches = () => w.fake.requests.filter((x) => x.method === 'PATCH').length;
  const n = patches();
  await w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: '2026-12-01T09:00:00.456Z' });
  assert.equal(patches(), n);
  // The digest handed back is the one the next verb has to name.
  await w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: '2026-12-02T09:00:00.456Z', expect: r.digest });
  // A landed PATCH whose answer was lost settles on the re-read.
  w.fake.fault('PATCH', /^\/tasks\/1$/, 500, { apply: true });
  await w.call(pm, 'task.schedule', { task_ref: a.task_ref, due_date: '2026-12-03T09:00:00.456Z' });
  assert.equal(w.fake.task(1).due, '2026-12-03T09:00:00Z');
  await sleep(20);
  assert.deepEqual(await w.adapter.tick('demo'), { snapshots: 0, events: 0 });
});
// Arms a fault on the final read: after `trigger` answers, the next GET of task 1 fails.
const thenFailRead = (trigger) => {
  const fake = new FakeVikunja();
  let armed = false;
  const fetch = async (url, init = {}) => {
    const res = await fake.fetch(url, init);
    if (armed && trigger(init.method ?? 'GET', new URL(url).pathname)) {
      armed = false;
      fake.fault('GET', /^\/tasks\/1$/, 0);
    }
    return res;
  };
  return { edit: { fake, fetch }, arm: () => (armed = true) };
};
test('every write landed and the final read failed: the verb succeeds and records what it wrote', async (t) => {
  const f = thenFailRead((m, p) => m === 'POST' && p.endsWith('/tasks/1/assignees'));
  const w = await ready(t, f.edit);
  const pm = w.agent('pm');
  const { task_ref } = await task(w);
  f.arm();
  const r = await w.call(pm, 'task.assign', { task_ref, role: 'coder' });
  assert.deepEqual(w.fake.task(1).assignees, [w.bots.coder]);
  assert.equal(w.events('task.assigned').length, 1);
  const s = w.snapshots(task_ref).at(-1);
  assert.equal(s.source, 'self');
  assert.deepEqual([...s.fields.assignees], [w.bots.coder]);
  assert.equal(s.digest, r.digest);
  await sleep(20);
  await w.adapter.tick('demo');
  assert.equal(w.events('task.changed.external').length, 0);
  await assert.rejects(w.call(pm, 'task.assign', { task_ref, role: 'coder' }), refusedWith('task-assigned'));
});
test('some writes landed and the final read failed: write-uncertain, and nothing is recorded', async (t) => {
  const f = thenFailRead((m, p) => m === 'POST' && p.endsWith('/tasks/1/labels'));
  const w = await ready(t, f.edit);
  const pm = w.agent('pm');
  const { task_ref } = await task(w);
  const n = w.snapshots(task_ref).length;
  w.fake.fault('POST', /^\/tasks\/1\/labels$/, 403);
  f.arm();
  await assert.rejects(
    w.call(pm, 'task.schedule', { task_ref, due_date: '2026-12-01T09:00:00.000Z', labels: { add: [w.label] } }),
    refusedWith('write-uncertain'),
  );
  assert.equal(w.fake.task(1).due, '2026-12-01T09:00:00Z');
  assert.equal(w.snapshots(task_ref).length, n);
});
test('a create whose final read fails succeeds and records task.created', async (t) => {
  const f = thenFailRead((m, p) => m === 'POST' && /\/projects\/\d+\/tasks$/.test(p));
  const w = await ready(t, f.edit);
  w.agent('pm');
  f.arm();
  const r = await task(w, { due_date: '2026-11-01T00:00:00.000Z' });
  assert.equal(w.events('task.created').length, 1);
  const [s] = w.snapshots(r.task_ref);
  assert.equal(s.source, 'self');
  assert.equal(s.digest, r.digest);
  await sleep(20);
  await w.adapter.tick('demo');
  assert.equal(w.events('task.changed.external').length, 0);
});
// The success snapshot holds what the verb wrote, not what the final read saw, so an edit that lands
// between the last write and that read is still a person's edit on the next poll.
test('an edit between the last write and the final read shows as external on the next poll', async (t) => {
  const fake = new FakeVikunja();
  let w,
    armed = false;
  w = await ready(t, {
    fake,
    fetch: async (url, init = {}) => {
      const res = await fake.fetch(url, init);
      if (armed && init.method === 'POST' && new URL(url).pathname.endsWith('/tasks/1/assignees')) {
        armed = false;
        await w.ui('PATCH', '/tasks/1', { title: 'renamed in the ui' });
      }
      return res;
    },
  });
  const pm = w.agent('pm');
  const { task_ref } = await task(w);
  armed = true;
  await w.call(pm, 'task.assign', { task_ref, role: 'coder' });
  assert.equal(w.snapshots(task_ref).at(-1).fields.title, 'a task');
  await sleep(20);
  await w.adapter.tick('demo');
  const ext = w.events('task.changed.external');
  assert.equal(ext.length, 1);
  assert.deepEqual(ext[0].body.changed, ['title']);
});
test('task.created is recorded when a later label write fails', async (t) => {
  const w = await ready(t);
  w.agent('pm');
  w.fake.fault('POST', /^\/tasks\/\d+\/labels$/, 500);
  await assert.rejects(task(w, { labels: [w.label] }), refusedWith('write-uncertain'));
  assert.notEqual(w.fake.task(1), undefined);
  assert.deepEqual(w.fake.task(1).labels, []);
  assert.equal(w.events('task.created').length, 1);
});