/**
 * DC-094: remaining gate-miss notification emitters + legacy 4-arg send shape.
 *
 * Part 1 — seven emitters were absent from DEFAULT events, so the send()
 * gate (config.events[canonical] !== true) silently dropped them all:
 * ssl-cert-expiry (ssl-monitor), dns-propagation (dns-propagation),
 * drift-detected (config-drift-detector), dependency-restart-complete/-failed
 * (dependency-manager), recipe-removed (recipes/manage), workflow
 * (bundled-workflows). Stored configs must inherit the new defaults via the
 * _mergeConfig shallow per-key merge.
 *
 * Part 2 — nine in-repo call sites used a legacy 4-arg shape
 * send(event, title, message, type) against the 3-arg signature: the message
 * string landed in the `type` slot (embed color fell back) and providers got
 * the TITLE as the body. send() now shims that shape, and the explicit title
 * flows to ntfy/email subjects and the Discord embed title.
 *
 * Part 3 — route EVENT_KEY_ALIASES and manager EVENT_ALIASES stay in sync:
 * recipeRemoved and the dependency-restart spellings fold in both places.
 */

'use strict';

const fs = require('fs');
const nodemailer = require('nodemailer');

jest.mock('fs', () => ({
  existsSync: jest.fn().mockReturnValue(false),
  readFileSync: jest.fn().mockReturnValue('{}'),
  writeFileSync: jest.fn(),
  mkdirSync: jest.fn(),
}));

jest.mock('nodemailer', () => ({
  createTransport: jest.fn(() => ({
    sendMail: jest.fn().mockResolvedValue({ messageId: 'mock' }),
  })),
}));

const NotificationManager = require('../src/managers/notification-manager');

describe('DC-094 NotificationManager', () => {
  let nm;

  beforeEach(() => {
    jest.clearAllMocks();
    fs.existsSync.mockReturnValue(false);
    fs.readFileSync.mockReturnValue('{}');
    nm = new NotificationManager({
      NOTIFICATIONS_FILE: '/tmp/dc094-notif-test.json',
      log: { error: jest.fn(), info: jest.fn(), warn: jest.fn() },
      fetchT: jest.fn(),
      docker: null,
    });
    // jest.config restoreMocks strips the factory nodemailer implementation
    // before every test; re-establish it and capture the sendMail mock so
    // email assertions don't depend on module state.
    nodemailer.createTransport.mockImplementation(() => {
      mailMock = jest.fn().mockResolvedValue({ messageId: 'mock' });
      return { sendMail: mailMock };
    });
    // Same aliasing hazard as providers: without a config file the
    // constructor's spread aliases module-level DEFAULT_CONFIG.events, so
    // gate-mutation tests would poison every later instance.
    nm.config.events = { ...nm.config.events };
  });

  let mailMock;

  afterEach(() => {
    nm.stopHealthDaemon();
  });

  describe('new events present in DEFAULT events (gate-miss fix)', () => {
    const newlyGated = [
      'ssl-cert-expiry',
      'dns-propagation',
      'drift-detected',
      'dependency-restart',
      'recipe-removed',
      'workflow',
    ];

    test.each(newlyGated)('%s defaults to enabled', (event) => {
      expect(nm.config.events[event]).toBe(true);
    });

    test.each(newlyGated)('%s passes the send() gate by default', async (event) => {
      nm.config.providers.discord = { enabled: false }; // no providers -> send short-circuits after the gate
      const result = await nm.send(event, { text: 'x' });
      expect(result.error).not.toBe(`Event ${event} not enabled`);
    });

    test('dependency-restart spellings alias onto the single canonical toggle', async () => {
      nm.config.events['dependency-restart'] = false;
      const complete = await nm.send('dependency-restart-complete', { text: 'x' });
      const failed = await nm.send('dependency-restart-failed', { text: 'x' });
      expect(complete.error).toBe('Event dependency-restart not enabled');
      expect(failed.error).toBe('Event dependency-restart not enabled');
    });

    test('recipeRemoved camelCase alias folds onto recipe-removed', async () => {
      nm.config.events['recipe-removed'] = false;
      const result = await nm.send('recipeRemoved', { text: 'x' });
      expect(result.error).toBe('Event recipe-removed not enabled');
    });

    test('stored pre-DC-094 configs inherit the new event defaults via merge', () => {
      // A config saved before this fix has none of the new keys. After load,
      // the defaults merge must supply them as enabled.
      const legacyFile = JSON.stringify({
        enabled: true,
        providers: { discord: { enabled: false, webhookUrl: '' } },
        events: { 'container-down': true, alert: true },
      });
      fs.existsSync.mockReturnValue(true);
      fs.readFileSync.mockReturnValue(legacyFile);
      const loaded = new NotificationManager({
        NOTIFICATIONS_FILE: '/tmp/dc094-notif-test.json',
        log: { error: jest.fn(), info: jest.fn(), warn: jest.fn() },
        fetchT: jest.fn(),
        docker: null,
      });
      for (const event of newlyGated) {
        expect(loaded.config.events[event]).toBe(true);
      }
      // operator choice preserved, not clobbered by defaults
      expect(loaded.config.events['container-down']).toBe(true);
    });

    test('stored legacy dependency-restart spellings fold at load', () => {
      const legacyFile = JSON.stringify({
        enabled: true,
        events: { 'dependency-restart-complete': false },
      });
      fs.existsSync.mockReturnValue(true);
      fs.readFileSync.mockReturnValue(legacyFile);
      const loaded = new NotificationManager({
        NOTIFICATIONS_FILE: '/tmp/dc094-notif-test.json',
        log: { error: jest.fn(), info: jest.fn(), warn: jest.fn() },
        fetchT: jest.fn(),
        docker: null,
      });
      expect(loaded.config.events['dependency-restart']).toBe(false);
      expect(loaded.config.events['dependency-restart-complete']).toBeUndefined();
    });
  });

  describe('legacy 4-arg send shape shim', () => {
    beforeEach(() => {
      // Fresh providers object per test: on the no-config-file constructor
      // path this.config.providers aliases module-level DEFAULT_CONFIG.providers,
      // so per-provider mutation in one test otherwise leaks into the next.
      nm.config.providers = {
        discord: { enabled: false, webhookUrl: '' },
        telegram: { enabled: false, botToken: '', chatId: '' },
        ntfy: { enabled: false, topic: '', serverUrl: 'https://ntfy.sh' },
        email: { enabled: false, host: '', port: 587, to: '', from: '', username: '', password: '' },
      };
      nm.config.providers.ntfy = { enabled: true, topic: 'dc094', serverUrl: 'https://ntfy.sh' };
      nm.ctx.fetchT = jest.fn().mockResolvedValue({ ok: true });
    });

    const ntfyCall = (n) => n.ctx.fetchT.mock.calls.find(c => String(c[0]).includes('ntfy.sh'));
    const discordCall = (n) => n.ctx.fetchT.mock.calls.find(c => String(c[0]).includes('hook.test'));

    test('send(event, title, message, type) delivers the message as body', async () => {
      const result = await nm.send('deploymentFailed', 'Recipe Failed', 'Failed to deploy **plex**: boom', 'error');
      expect(result.success).toBe(true);
      const body = ntfyCall(nm)[1].body;
      expect(body).toBe('Failed to deploy **plex**: boom');
    });

    test('the explicit legacy title reaches the ntfy Title header', async () => {
      await nm.send('deploymentFailed', 'Recipe Failed', 'boom', 'error');
      const headers = ntfyCall(nm)[1].headers;
      expect(headers.Title).toBe('Recipe Failed');
    });

    test('canonical-title events without data.title still get the mapped title', async () => {
      await nm.send('ssl-cert-expiry', { text: 'expiring' }, 'warning');
      const headers = ntfyCall(nm)[1].headers;
      expect(headers.Title).toBe('SSL Certificate Expiry');
    });

    test('Discord embed carries the explicit title and the right severity color', async () => {
      nm.config.providers.discord = { enabled: true, webhookUrl: 'https://hook.test/x' };
      nm.config.providers.ntfy = { enabled: false };
      await nm.send('deploymentFailed', 'Recipe Failed', 'boom', 'error');
      const payload = JSON.parse(discordCall(nm)[1].body);
      expect(payload.embeds[0].title).toBe('Recipe Failed');
      expect(payload.embeds[0].description).toBe('boom');
      expect(payload.embeds[0].color).toBe(15158332); // error/red, not the info-blue fallback
    });

    test('email subject uses the explicit title', async () => {
      nm.config.providers.email = { enabled: true, host: 'smtp.test', port: 587, to: 'a@b.c', from: 'd@e.f', username: '', password: '' };
      nm.config.providers.ntfy = { enabled: false };
      await nm.send('deploymentSuccess', 'Recipe Deployed', 'plex deployed', 'success');
      expect(mailMock.mock.calls.length).toBeGreaterThan(0);
      const last = mailMock.mock.calls[mailMock.mock.calls.length - 1];
      expect(last[0].subject).toBe('Recipe Deployed');
      expect(last[0].text).toBe('plex deployed');
    });

    test('history records the canonical event and the explicit title', async () => {
      await nm.send('recipeRemoved', 'Recipe Removed', 'Removed **plex** recipe (3 containers).', 'info');
      const entry = nm.getHistory()[0];
      expect(entry.event).toBe('recipe-removed');
      expect(entry.title).toBe('Recipe Removed');
    });

    test('3-arg object calls are unchanged (no regression)', async () => {
      await nm.send('alert', { text: 'resource spike' }, 'warning');
      const body = ntfyCall(nm)[1].body;
      expect(body).toBe('resource spike');
      const headers = ntfyCall(nm)[1].headers;
      expect(headers.Title).toBe('Resource Alert');
    });

    test('shim is type-guarded: a 4th arg with object data is not rewritten', async () => {
      const data = { text: 'kept' };
      await nm.send('alert', data, 'warning', 'stray-extra');
      // Object data passes through untouched (stray 4th arg ignored, not
      // treated as a legacy type) — the shim only fires for legacy
      // string-title calls.
      const body = ntfyCall(nm)[1].body;
      expect(body).toBe('kept');
      const entry = nm.getHistory()[0];
      expect(entry.type).toBe('warning');
    });
  });
});