import test from 'node:test';
import assert from 'node:assert/strict';
import { fork } from 'node:child_process';
import { mkdtempSync, rmSync, existsSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { once } from 'node:events';
import { Store } from '../src/store.mjs';
import { Broker, BusError, TASK_VERBS } from '../src/broker.mjs';
import { serve } from '../src/server.mjs';
import { startBroker } from '../src/runtime.mjs';
import { Client } from '../src/client.mjs';
// The S3 hooks: recordTask, taskView and requestTask on the broker, the server's task branch, the
// runtime's adapter factory and the process's `trackers` boot field.
const businesses = {
  demo: {
    id: 'demo',
    human: 'jason',
    arbiters: { technical: 'cto', delivery: 'pm' },
    roles: {
      pm: { authority: { withinRole: ['message.send', 'task.create'], crossRole: [] } },
      cto: { authority: { withinRole: ['message.send'], crossRole: [] } },
    },
  },
  other: {
    id: 'other',
    human: 'jason',
    arbiters: { technical: 'pm', delivery: 'pm' },
    roles: { pm: { authority: { withinRole: ['message.send'], crossRole: [] } } },
  },
};
const SECRET = 'tk_' + 'z'.repeat(40);
const digest = 'b'.repeat(64);
const at = '2026-10-08T12:00:00.000Z';
function setup(t) {
  const root = mkdtempSync(join(tmpdir(), 'bus-tasks-'));
  const store = new Store(root);
  const b = new Broker({
    store,
    businesses,
    secretCheck: (v) => {
      if (JSON.stringify(v ?? null).includes(SECRET)) throw new BusError('secret-detected');
    },
  });
  t.after(() => {
    store.close();
    rmSync(root, { recursive: true, force: true });
  });
  const agent = (role, business = 'demo') => {
    const cap = b.bindLaunch({ business, role, run: `${business}-${role}`, harness: 'pi' });
    b.request(cap, { verb: 'role.claim' });
    return cap;
  };
  const human = b.bindHuman({ business: 'demo', human: 'jason', via: 'cli', outsideAgent: true });
  const count = (table, where = '1') => store.get(`SELECT count(*) n FROM ${table} WHERE ${where}`).n;
  return { root, store, b, agent, human, count };
}
const poll = (extra = {}) => ({
  task_ref: 'vikunja:3/7',
  updated: at,
  digest,
  fields: { bucket: 11, done: false },
  via: 'board',
  read_at: at,
  ...extra,
});
const self = (extra = {}) => ({ task_ref: 'vikunja:3/7', updated: at, digest, fields: { bucket: 12, done: false }, ...extra });
test('recordTask keeps sync reads and a role write apart', (t) => {
  const { b, agent, human, store, count } = setup(t);
  const pm = agent('pm');
  b.recordTask({
    business: 'demo',
    snapshots: [poll()],
    events: [{ kind: 'task.changed.external', subject: 'vikunja:3/7', body: { changed: ['bucket'] } }],
  });
  const row = store.get('SELECT * FROM task_snapshots');
  assert.deepEqual([row.source, row.via, row.read_at, row.role, row.run], ['poll', 'board', at, null, null]);
  assert.equal(store.get("SELECT actor_role FROM events WHERE kind='task.changed.external'").actor_role, null);
  b.recordTask({ cap: pm, business: 'demo', snapshots: [self()], events: [{ kind: 'task.assigned', subject: 'vikunja:3/7', body: { role: 'coder' } }] });
  const mine = store.get("SELECT * FROM task_snapshots WHERE source='self'");
  assert.deepEqual([mine.via, mine.read_at, mine.role, mine.run], [null, null, 'pm', 'demo-pm']);
  // Each side records only its own event kinds and snapshot fields.
  const refuse = (record, code) => assert.throws(() => b.recordTask(record), (e) => e.code === code, JSON.stringify(record));
  refuse({ business: 'demo', events: [{ kind: 'task.created', body: {} }] }, 'reserved-event');
  refuse({ cap: pm, business: 'demo', events: [{ kind: 'task.changed.external', body: {} }] }, 'reserved-event');
  refuse({ business: 'demo', events: [{ kind: 'human.input', body: {} }] }, 'reserved-event');
  refuse({ cap: pm, business: 'demo', snapshots: [{ ...self(), via: 'board' }] }, 'invalid-request');
  refuse({ business: 'demo', snapshots: [poll({ via: 'ui' })] }, 'invalid-snapshot');
  refuse({ business: 'demo', snapshots: [poll({ digest: 'B'.repeat(64) })] }, 'invalid-snapshot');
  refuse({ business: 'demo', snapshots: [poll({ task_ref: 'jira:3/7' })] }, 'invalid-snapshot');
  refuse({ business: 'demo', snapshots: [poll({ fields: [] })] }, 'invalid-snapshot');
  refuse({ business: 'demo', events: [{ kind: 'task.missing', body: 'gone' }] }, 'invalid-request');
  refuse({ business: 'demo', events: {} }, 'invalid-request');
  refuse({ business: 'nope' }, 'unknown-business');
  // A cap must be an agent of the business it records for.
  refuse({ cap: human, business: 'demo' }, 'agent-required');
  refuse({ cap: agent('pm', 'other'), business: 'demo' }, 'agent-required');
  refuse({ business: 'demo', events: [{ kind: 'task.missing', body: { note: SECRET } }] }, 'secret-detected');
  assert.equal(count('task_snapshots'), 2);
  assert.equal(count('events', "kind LIKE 'task.%'"), 2);
});
test('read_at must be one canonical UTC format, so the projection compares strings safely', (t) => {
  const { b, count } = setup(t);
  // task_current orders read_at as text; a second format would sort wrong against the broker's `at`.
  for (const read_at of [
    '2026-10-08T12:00:00Z',
    '2026-10-08T12:00:00.000+00:00',
    '2026-10-08 12:00:00.000Z',
    '2026-02-30T12:00:00.000Z',
    Date.parse(at),
    null,
  ])
    assert.throws(
      () => b.recordTask({ business: 'demo', snapshots: [poll({ read_at })] }),
      (e) => e.code === 'invalid-snapshot',
      String(read_at),
    );
  assert.equal(count('task_snapshots'), 0);
});
test('a bad entry refuses the whole record', (t) => {
  const { b, count } = setup(t);
  assert.throws(() =>
    b.recordTask({
      business: 'demo',
      snapshots: [poll(), poll({ task_ref: 'vikunja:3/8' })],
      events: [
        { kind: 'task.changed.external', body: {} },
        { kind: 'task.state', body: {} },
      ],
    }),
  );
  assert.equal(count('task_snapshots'), 0);
  assert.equal(count('events', "kind LIKE 'task.%'"), 0);
});
test('taskView reads the projection for one business', (t) => {
  const { b, human } = setup(t);
  b.recordTask({ business: 'demo', snapshots: [poll(), poll({ task_ref: 'vikunja:3/8', fields: { bucket: 14, done: true } })] });
  assert.deepEqual(
    b.taskView('demo', 'current').map((r) => [r.task_ref, r.fields.bucket]),
    [
      ['vikunja:3/7', 11],
      ['vikunja:3/8', 14],
    ],
  );
  assert.equal(b.taskView('demo', 'current', 'vikunja:3/8').fields.done, true);
  assert.equal(b.taskView('demo', 'current', 'vikunja:3/9'), null);
  assert.deepEqual(b.taskView('other', 'current'), []);
  assert.deepEqual(
    b.taskView('demo', 'open').map((r) => ({ ...r })),
    [{ task_ref: 'vikunja:3/7', bucket: 11 }],
  );
  const { request } = b.request(human, { verb: 'message.send', args: { to: 'pm', body: 'please' } });
  assert.equal(b.taskView('demo', 'input', request), true);
  assert.equal(b.taskView('other', 'input', request), false);
  assert.equal(b.taskView('demo', 'input', 'evt-none'), false);
  assert.throws(() => b.taskView('demo', 'current', 'vikunja:x'), (e) => e.code === 'invalid-request');
  assert.throws(() => b.taskView('demo', 'snapshots'), (e) => e.code === 'invalid-request');
  assert.throws(() => b.taskView('nope', 'current'), (e) => e.code === 'unknown-business');
});
test('requestTask hands only a holder and a task verb to the handler, and records refusals', async (t) => {
  const { b, agent, human, store } = setup(t);
  const pm = agent('pm');
  const calls = [];
  const handler = async (cap, verb, args) => {
    calls.push([cap === pm, verb, args]);
    if (args.fail === 'typed') throw new BusError('tracker-unavailable');
    if (args.fail === 'raw') throw new Error('socket hang up at http://vikunja.test');
    if (args.fail === 'leak') return { echo: SECRET };
    return { task_ref: 'vikunja:3/7' };
  };
  assert.deepEqual(TASK_VERBS.length, 8);
  assert.deepEqual(await b.requestTask(pm, { verb: 'task.create', args: { title: 'x' } }, handler), { task_ref: 'vikunja:3/7' });
  const refused = () => store.all("SELECT body, subject FROM events WHERE kind='action.refused' ORDER BY seq").map((e) => [JSON.parse(e.body).code, e.subject]);
  const refuse = async (cap, request, code) =>
    assert.rejects(b.requestTask(cap, request, handler), (e) => e instanceof BusError && e.code === code, JSON.stringify(request));
  await refuse(pm, { verb: 'message.send', args: {} }, 'unknown-verb');
  await refuse(pm, { verb: 'task.create', args: [] }, 'invalid-request');
  await refuse(pm, { verb: 'task.create', extra: 1 }, 'invalid-request');
  await refuse(pm, { verb: 'task.create', args: { title: SECRET } }, 'secret-detected');
  await refuse(human, { verb: 'task.close', args: { task_ref: 'vikunja:3/7' } }, 'agent-required');
  const stale = b.bindLaunch({ business: 'demo', role: 'cto', run: 'unclaimed', harness: 'pi' });
  await refuse(stale, { verb: 'task.close', args: { task_ref: 'vikunja:3/7' } }, 'not-holder');
  assert.equal(calls.length, 1);
  await refuse(pm, { verb: 'task.close', args: { task_ref: 'vikunja:3/7', fail: 'typed' } }, 'tracker-unavailable');
  await refuse(pm, { verb: 'task.close', args: { task_ref: 'vikunja:3/7', fail: 'raw' } }, 'adapter-failed');
  await refuse(pm, { verb: 'task.close', args: { task_ref: 'vikunja:3/7', fail: 'leak' } }, 'secret-detected');
  assert.equal(calls.length, 4);
  assert.deepEqual(refused(), [
    ['unknown-verb', null],
    ['invalid-request', null],
    ['invalid-request', null],
    ['secret-detected', null],
    ['agent-required', 'vikunja:3/7'],
    ['not-holder', 'vikunja:3/7'],
    ['tracker-unavailable', 'vikunja:3/7'],
    ['adapter-failed', 'vikunja:3/7'],
    ['secret-detected', 'vikunja:3/7'],
  ]);
  // Neither the raw error text nor the secret reaches the database.
  const all = JSON.stringify(store.all('SELECT * FROM events'));
  assert.ok(!all.includes('hang up') && !all.includes(SECRET));
});
test('the server sends task verbs to the adapter with its own timeout; other verbs stay synchronous', async (t) => {
  const { b, agent, store } = setup(t);
  const pm = agent('pm');
  const path = join(store.directory, 'broker.sock');
  let seen = null;
  const tasks = {
    timeout: 2000,
    handle: async (cap, verb, args) => {
      seen = verb;
      // Longer than the server's idle timeout of 50 ms below.
      await new Promise((ok) => setTimeout(ok, 200));
      return { verb, args };
    },
  };
  const server = await serve({ broker: b, path, timeout: 50, tasks });
  t.after(() => server.close());
  const c = new Client({ path, cap: pm });
  assert.deepEqual(await c.call('task.close', { task_ref: 'vikunja:3/7' }), { verb: 'task.close', args: { task_ref: 'vikunja:3/7' } });
  assert.equal(seen, 'task.close');
  seen = null;
  assert.equal((await c.call('message.send', { to: 'pm', body: 'hi' })).request, null);
  assert.equal(seen, null);
  await assert.rejects(c.call('task.sql', {}), /unknown-verb/);
  // A client that gives up first gets outcome-unknown, never a retry.
  await assert.rejects(new Client({ path, cap: pm, timeout: 50 }).call('task.create', { title: 'x' }), /outcome-unknown/);
});
test('without an adapter the server refuses every task verb', async (t) => {
  const { b, agent, store } = setup(t);
  const path = join(store.directory, 'broker.sock');
  const server = await serve({ broker: b, path });
  t.after(() => server.close());
  const c = new Client({ path, cap: agent('pm') });
  for (const verb of TASK_VERBS) await assert.rejects(c.call(verb, { task_ref: 'vikunja:3/7' }), /unknown-verb/, verb);
});
test('the runtime refuses an invalid adapter and closes a valid one', async (t) => {
  const root = mkdtempSync(join(tmpdir(), 'bus-tasks-rt-'));
  t.after(() => rmSync(root, { recursive: true, force: true }));
  let closed = 0;
  for (const made of [null, {}, { handle: () => {}, timeout: 0 }, { handle: () => {}, timeout: 1.5 }, { handle: 'x', timeout: 10 }])
    await assert.rejects(
      startBroker({ dataRoot: root, businesses, tasks: async () => (made ? { ...made, close: () => closed++ } : made) }),
      (e) => e.code === 'invalid-adapter',
      JSON.stringify(made),
    );
  // Each refusal closed what it had opened, the adapter included; the writer lock is free.
  assert.equal(closed, 4);
  assert.equal(existsSync(join(root, 'bus/writer.lock')), false);
  let given = null;
  const runtime = await startBroker({
    dataRoot: root,
    businesses,
    tasks: async (deps) => {
      given = Object.keys(deps).sort();
      return { handle: async () => ({ ok: 1 }), timeout: 1000, close: async () => closed++ };
    },
  });
  assert.deepEqual(given, ['broker', 'businesses', 'credentials']);
  await runtime.close();
  assert.equal(closed, 5);
  await assert.rejects(
    startBroker({
      dataRoot: root,
      businesses,
      tasks: async () => {
        throw new BusError('tracker-config');
      },
    }),
    (e) => e.code === 'tracker-config',
  );
  assert.equal(existsSync(join(root, 'bus/writer.lock')), false);
});
async function boot(t, config) {
  const child = fork(new URL('../src/process.mjs', import.meta.url), [], { stdio: ['ignore', 'pipe', 'pipe', 'ipc'] });
  t.after(() => {
    if (child.exitCode === null) child.kill('SIGKILL');
  });
  const reply = Promise.race([
    once(child, 'message'),
    once(child, 'exit').then(() => {
      throw Error('exited-before-reply');
    }),
  ]);
  child.send({ op: 'boot', config });
  return { child, reply: (await reply)[0] };
}
test('the process loads the S3 adapter from plain-data trackers', async (t) => {
  const root = mkdtempSync(join(tmpdir(), 'bus-tasks-proc-'));
  t.after(() => rmSync(root, { recursive: true, force: true }));
  const launches = [{ business: 'demo', role: 'pm', run: 'r1', harness: 'pi', pid: process.pid, startTime: '1' }];
  // A tracker for a business the host doesn't define refuses the boot with the adapter's code.
  const bad = await boot(t, { dataRoot: root, businesses, launches, trackers: { nope: { baseUrl: 'http://127.0.0.1:9', project: 1 } } });
  assert.deepEqual(bad.reply, { ok: false, error: 'tracker-config' });
  await once(bad.child, 'exit');
  // An empty tracker map loads the adapter; a business without an entry refuses task verbs.
  const { child, reply } = await boot(t, { dataRoot: root, businesses, launches, trackers: {} });
  assert.equal(reply.ok, true);
  const pm = new Client({ path: reply.path, cap: reply.launches[0].cap });
  await pm.call('role.claim');
  await assert.rejects(pm.call('task.create', { title: 'x' }), /tracker-unconfigured/);
  const exit = once(child, 'exit');
  child.send({ op: 'close' });
  assert.equal((await exit)[0], 0);
});