import assert from 'node:assert/strict';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import test from 'node:test';

import { createActivityJournalService } from '../../dist/server/services/activityJournalService.js';
import { assertActivityJournalPage } from '../../dist/shared/activityJournal.js';

function fixture(t) {
  const directory = fs.mkdtempSync(path.join(os.tmpdir(), 'harbor-journal-'));
  t.after(() => fs.rmSync(directory, { recursive: true, force: true }));
  return path.join(directory, 'activity-journal.json');
}

const event = (dedupeKey, profileLabel = 'Home') => ({
  type: 'subscription.refreshed',
  severity: 'info',
  source: 'subscription',
  dedupeKey: `subscription.refreshed:${dedupeKey}`,
  data: { profileId: 'profile-1', profileLabel, host: 'provider.example', serverCount: 12, added: 2, removed: 1 },
});

test('journal appends typed events, deduplicates and keeps stable newest-first cursors', (t) => {
  let clock = new Date('2026-08-19T10:00:00.000Z');
  const filePath = fixture(t);
  const service = createActivityJournalService({ filePath, now: () => clock });
  service.append(event('refresh:1', 'One'));
  clock = new Date('2026-08-19T10:01:00.000Z');
  service.append(event('refresh:2', 'Two'));
  service.append(event('refresh:2', 'Duplicate'));
  const first = service.page(1);
  assert.equal(first.events[0].data.profileLabel, 'Two');
  assert.ok(first.nextCursor);

  clock = new Date('2026-08-19T10:02:00.000Z');
  service.append(event('refresh:3', 'Three'));
  const older = service.page(10, first.nextCursor);
  assert.deepEqual(older.events.map(({ data }) => data.profileLabel), ['One']);
  assert.equal(first.events[0].dedupeKey, null);
  const inode = fs.statSync(filePath).ino;
  assert.equal(service.page(10).events.length, 3);
  assert.equal(fs.statSync(filePath).ino, inode);
  assert.deepEqual(service.page(10, 'expired-cursor').events, []);
});

test('journal prunes events older than 30 days and rejects unsafe payloads', (t) => {
  let clock = new Date('2026-07-01T00:00:00.000Z');
  const filePath = fixture(t);
  const service = createActivityJournalService({ filePath, now: () => clock });
  service.append(event('old'));
  clock = new Date('2026-08-19T00:00:00.000Z');
  assert.deepEqual(service.page().events, []);
  assert.deepEqual(JSON.parse(fs.readFileSync(filePath, 'utf8')).events, []);
  service.append(event('new'));
  assert.throws(() => service.append({ ...event('unsafe'), data: { rawUrl: 'https://secret' } }), /Unsafe/);
  service.append({ ...event('ip'), data: { ...event('ip').data, host: '192.168.1.1' } });
  service.append(event('credential-label', 'https://user:pass@example.test/private?token=secret'));
  service.append(event('path-label', '192.168.1.7/private'));
  service.append(event('ipv6-label', '2001:db8::1'));
  const page = service.page();
  const labels = page.events.slice(0, 3).map(({ data }) => data.profileLabel);
  assert.deepEqual(labels, ['Подписка', 'Подписка', 'Подписка']);
  assert.equal(page.events.find(({ data }) => data.host === 'Провайдер')?.data.host, 'Провайдер');
  for (const dedupeKey of [
    'subscription.refreshed:192.168.1.1',
    'subscription.refreshed:2001:db8::1',
    'subscription.refreshed:user:pass',
  ]) service.append({ ...event('safe'), dedupeKey });
  service.append({ ...event('safe'), dedupeKey: 'subscription.refreshed:user:pass' });
  const persisted = fs.readFileSync(filePath, 'utf8');
  assert.doesNotMatch(persisted, /user:pass|192\.168\.1\.1|192\.168\.1\.7|2001:db8|token=secret/);
  assert.match(persisted, /subscription\.refreshed:sha256:[a-f0-9]{64}/);
  assert.throws(() => service.append({ ...event('safe'), dedupeKey: 'https://user:pass@example.test/private?token=x' }), /dedupe/i);
  assert.throws(() => service.append({ ...event('safe'), dedupeKey: 'subscription.refreshed:private/path' }), /dedupe/i);
});

test('journal persists the 10,000 event cap when opening an oversized store', (t) => {
  const filePath = fixture(t);
  const occurredAt = '2026-08-19T00:00:00.000Z';
  const events = Array.from({ length: 10_001 }, (_, index) => ({
    id: `00000000-0000-4000-8000-${String(index).padStart(12, '0')}`,
    occurredAt,
    ...event(`event:${index}`),
  }));
  fs.writeFileSync(filePath, JSON.stringify({ schemaVersion: 1, events }));
  const service = createActivityJournalService({
    filePath,
    now: () => new Date('2026-08-19T01:00:00.000Z'),
  });
  assert.equal(JSON.parse(fs.readFileSync(filePath, 'utf8')).events.length, 10_000);
  assert.equal(service.page(1).events.length, 1);
});

test('corrupt journal is isolated and recovery becomes a safe event', (t) => {
  const filePath = fixture(t);
  fs.writeFileSync(filePath, '{broken');
  const service = createActivityJournalService({
    filePath,
    now: () => new Date('2026-08-19T12:00:00.000Z'),
  });
  const page = service.page();
  assert.equal(page.storage.status, 'ready');
  assert.equal(page.events[0].type, 'journal.recovered');
  assert.ok(fs.readdirSync(path.dirname(filePath)).some((name) => name.includes('.corrupt-')));
});

test('journal exposes a latched write failure until a later append succeeds', (t) => {
  const filePath = fixture(t);
  const service = createActivityJournalService({ filePath });
  service.append(event('before-error'));
  const renameSync = fs.renameSync;
  fs.renameSync = (source, target) => {
    if (target === filePath) throw new Error('simulated journal write failure');
    return renameSync(source, target);
  };
  try {
    assert.throws(() => service.append(event('lost')));
    const failed = service.page();
    assert.equal(failed.storage.status, 'error');
    assert.equal(failed.storage.errorCode, 'JOURNAL_UNAVAILABLE');
    assert.equal(failed.events.length, 1);
    assert.equal(failed.events[0].dedupeKey, null);
  } finally {
    fs.renameSync = renameSync;
  }
  service.append(event('recovered'));
  assert.equal(service.page().storage.status, 'ready');
});


test('schema version 1 keeps legacy recovery and accepts per-channel health events', (t) => {
  const filePath = fixture(t);
  const occurredAt = '2026-08-19T09:00:00.000Z';
  fs.writeFileSync(filePath, JSON.stringify({
    schemaVersion: 1,
    events: [{
      id: '00000000-0000-4000-8000-000000000001',
      occurredAt,
      type: 'failover.recovered',
      severity: 'info',
      source: 'failover',
      dedupeKey: null,
      data: { role: 'primary', reason: 'primary-recovered' },
    }],
  }));
  let clock = new Date('2026-08-19T10:00:00.000Z');
  const service = createActivityJournalService({ filePath, now: () => clock });
  const inputs = [
    ['failover.primary_unavailable', 'primary', 'warning', 'probe-failed'],
    ['failover.primary_recovered', 'primary', 'info', 'probe-recovered'],
    ['failover.reserve_unavailable', 'reserve', 'warning', 'probe-failed'],
    ['failover.reserve_recovered', 'reserve', 'info', 'probe-recovered'],
  ];
  for (const [type, role, severity, reason] of inputs) {
    service.append({
      type,
      severity,
      source: 'failover',
      dedupeKey: null,
      data: { role, reason },
    });
    clock = new Date(clock.getTime() + 1_000);
  }

  const page = service.page();
  assert.deepEqual(page.events.map(({ type }) => type), [
    'failover.reserve_recovered',
    'failover.reserve_unavailable',
    'failover.primary_recovered',
    'failover.primary_unavailable',
    'failover.recovered',
  ]);
  assert.deepEqual(page.events.at(-1).data, { role: 'primary', reason: 'primary-recovered' });
  assert.equal(page.retentionDays, 30);
  assert.equal(JSON.parse(fs.readFileSync(filePath, 'utf8')).schemaVersion, 1);
});
test('journal page parser rejects malformed wire data and strips unknown event fields', (t) => {
  const service = createActivityJournalService({ filePath: fixture(t) });
  service.append(event('wire'));
  const page = service.page();
  const parsed = assertActivityJournalPage({
    ...page,
    events: page.events.map((item) => ({ ...item, ignored: 'value' })),
  });
  assert.equal(Object.hasOwn(parsed.events[0], 'ignored'), false);
  assert.throws(() => assertActivityJournalPage({ ...page, retentionDays: 31 }), TypeError);
  assert.throws(() => assertActivityJournalPage({ ...page, events: [{ broken: true }] }), TypeError);
  const future = assertActivityJournalPage({
    ...page,
    events: [{ ...page.events[0], type: 'future.safe_event', data: { raw: 'not exposed' } }],
  });
  assert.equal(future.events[0].type, 'unknown');
  assert.deepEqual(future.events[0].data, {});
});