import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { runCertificateMonitoring } from '../src/server/modules/monitoring/monitor.js';
import { pool } from '../src/server/db/pool.js';
import { getCertificateExpiry } from '../src/server/modules/monitoring/certificate.js';
import { deliverNotifications } from '../src/server/modules/monitoring/notifications.js';

const mocks = vi.hoisted(() => ({
  client: {
    query: vi.fn(),
    release: vi.fn(),
  },
  getCertificateExpiry: vi.fn(),
  deliverNotifications: vi.fn(),
}));

vi.mock('../src/server/db/pool.js', () => ({
  pool: {
    connect: vi.fn(async () => mocks.client),
  },
}));

vi.mock('../src/server/modules/monitoring/certificate.js', () => ({
  getCertificateExpiry: mocks.getCertificateExpiry,
}));

vi.mock('../src/server/modules/monitoring/notifications.js', () => ({
  deliverNotifications: mocks.deliverNotifications,
}));

const SITE_ID = '22222222-2222-4222-8222-222222222222';
const USER_ID = '11111111-1111-4111-8111-111111111111';
const WEBHOOK_ID = '44444444-4444-4444-8444-444444444444';
const CONDITION_ID = '55555555-5555-4555-8555-555555555555';
const NOW = new Date('2026-05-25T00:00:00.000Z');

describe('certificate monitoring', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    vi.useFakeTimers();
    vi.setSystemTime(NOW);
  });

  afterEach(() => {
    vi.useRealTimers();
  });

  it('stores the latest certificate expiry and creates an alert when a threshold matches', async () => {
    const issuer = 'C = US, O = Example CA, CN = Example Root';
    const issuedAt = new Date('2026-01-01T00:00:00.000Z');
    const expiresAt = new Date(Date.now() + 11.5 * 60 * 60 * 1000);

    getCertificateExpiry.mockResolvedValue({
      issuer,
      issuedAt,
      expiresAt,
      hoursUntilExpiry: 12,
    });
    deliverNotifications.mockResolvedValue({
      webhook: [{ ok: true }],
      push: { ok: true },
    });

    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [
                {
                  site_alert_condition_id: CONDITION_ID,
                  threshold_hours: 12,
                  webhook_method_ids: [WEBHOOK_ID],
                  push_enabled: true,
                },
              ],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_issuer')) {
        expect(sql).toContain('certificate_issued_at');
        expect(sql).toContain('certificate_expires_at');
        expect(params).toEqual([SITE_ID, issuer, issuedAt, expiresAt]);
        return { rows: [] };
      }

      if (sql.includes('FROM notification_methods') && sql.includes("notification_type = 'webhook'")) {
        expect(params).toEqual([USER_ID, [WEBHOOK_ID]]);
        return {
          rows: [
            {
              notification_method_id: WEBHOOK_ID,
              alias: 'Deploy hook',
              url: 'https://hooks.example.com/',
            },
          ],
        };
      }

      if (sql.includes('FROM notification_methods') && sql.includes("notification_type = 'push'")) {
        expect(params).toEqual([USER_ID]);
        return {
          rows: [
            {
              notification_method_id: '66666666-6666-4666-8666-666666666666',
              push_endpoint: 'https://push.example.com/subscription',
              push_p256dh: 'p256dh',
              push_auth: 'auth',
            },
          ],
        };
      }

      if (sql.includes('INSERT INTO alert_history')) {
        expect(params[0]).toBe(USER_ID);
        expect(params[1]).toBe(SITE_ID);
        expect(params[2]).toBe('certificate_expiring');
        expect(params[4]).toEqual(['app', 'webhook', 'push']);
        return { rows: [{ alert_id: '77777777-7777-4777-8777-777777777777' }] };
      }

      if (sql.includes('UPDATE site_alert_conditions')) {
        expect(sql).toContain('last_notified_certificate_expires_at');
        expect(sql).toContain('last_notified_at = now()');
        expect(params).toEqual([CONDITION_ID, expiresAt]);
        return { rows: [] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(pool.connect).toHaveBeenCalledOnce();
    expect(getCertificateExpiry).toHaveBeenCalledWith('https://example.com/');
    expect(deliverNotifications).toHaveBeenCalledOnce();
    expect(mocks.client.release).toHaveBeenCalledOnce();
    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 1,
      results: [{ siteId: SITE_ID, ok: true, alertsCreated: 1 }],
    });
  });

  it('stores certificate check errors without clearing the previous expiry', async () => {
    const error = new Error('openssl failed');

    getCertificateExpiry.mockRejectedValue(error);
    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_checked_at') && sql.includes('certificate_check_error = $2')) {
        expect(sql).not.toContain('certificate_expires_at');
        expect(params).toEqual([SITE_ID, error.message]);
        return { rows: [] };
      }

      if (sql.includes('INSERT INTO alert_history')) {
        expect(params[2]).toBe('certificate_check_failed');
        expect(JSON.parse(params[5])).toMatchObject({ error: error.message });
        return { rows: [{ alert_id: '77777777-7777-4777-8777-777777777777' }] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 1,
      results: [{ siteId: SITE_ID, ok: false, error: error.message }],
    });
  });

  it('checks and stores certificate expiry for sites without alert conditions', async () => {
    const issuer = 'C = US, O = Example CA, CN = Example Root';
    const issuedAt = new Date('2026-01-01T00:00:00.000Z');
    const expiresAt = new Date(Date.now() + 90 * 24 * 60 * 60 * 1000);

    getCertificateExpiry.mockResolvedValue({
      issuer,
      issuedAt,
      expiresAt,
      hoursUntilExpiry: 90 * 24,
    });

    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_issuer')) {
        expect(sql).toContain('certificate_issued_at');
        expect(sql).toContain('certificate_expires_at');
        expect(params).toEqual([SITE_ID, issuer, issuedAt, expiresAt]);
        return { rows: [] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(getCertificateExpiry).toHaveBeenCalledWith('https://example.com/');
    expect(deliverNotifications).not.toHaveBeenCalled();
    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 0,
      results: [{ siteId: SITE_ID, ok: true, alertsCreated: 0 }],
    });
  });

  it('does not notify again when the same certificate expiry was already handled', async () => {
    const issuer = 'C = US, O = Example CA, CN = Example Root';
    const issuedAt = new Date('2026-01-01T00:00:00.000Z');
    const expiresAt = new Date(Date.now() + 11.5 * 60 * 60 * 1000);

    getCertificateExpiry.mockResolvedValue({
      issuer,
      issuedAt,
      expiresAt,
      hoursUntilExpiry: 12,
    });

    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [
                {
                  site_alert_condition_id: CONDITION_ID,
                  threshold_hours: 12,
                  webhook_method_ids: [WEBHOOK_ID],
                  push_enabled: true,
                  last_notified_certificate_expires_at: expiresAt,
                },
              ],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_issuer')) {
        expect(params).toEqual([SITE_ID, issuer, issuedAt, expiresAt]);
        return { rows: [] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(deliverNotifications).not.toHaveBeenCalled();
    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 0,
      results: [{ siteId: SITE_ID, ok: true, alertsCreated: 0 }],
    });
  });

  it('marks a condition as handled without notifying when it is more than an hour late', async () => {
    const issuer = 'C = US, O = Example CA, CN = Example Root';
    const issuedAt = new Date('2026-01-01T00:00:00.000Z');
    const expiresAt = new Date(Date.now() + 23 * 60 * 60 * 1000);

    getCertificateExpiry.mockResolvedValue({
      issuer,
      issuedAt,
      expiresAt,
      hoursUntilExpiry: 23,
    });

    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [
                {
                  site_alert_condition_id: CONDITION_ID,
                  threshold_hours: 24,
                  webhook_method_ids: [WEBHOOK_ID],
                  push_enabled: true,
                },
              ],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_issuer')) {
        expect(params).toEqual([SITE_ID, issuer, issuedAt, expiresAt]);
        return { rows: [] };
      }

      if (sql.includes('UPDATE site_alert_conditions')) {
        expect(sql).toContain('last_notification_skipped_at = now()');
        expect(params).toEqual([CONDITION_ID, expiresAt]);
        return { rows: [] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(deliverNotifications).not.toHaveBeenCalled();
    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 0,
      results: [{ siteId: SITE_ID, ok: true, alertsCreated: 0 }],
    });
  });

  it('notifies and records handled state when a matching condition is less than an hour late', async () => {
    const issuer = 'C = US, O = Example CA, CN = Example Root';
    const issuedAt = new Date('2026-01-01T00:00:00.000Z');
    const expiresAt = new Date(Date.now() + 23.5 * 60 * 60 * 1000);

    getCertificateExpiry.mockResolvedValue({
      issuer,
      issuedAt,
      expiresAt,
      hoursUntilExpiry: 23,
    });
    deliverNotifications.mockResolvedValue({
      webhook: [],
      push: { ok: true },
    });

    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [
                {
                  site_alert_condition_id: CONDITION_ID,
                  threshold_hours: 24,
                  webhook_method_ids: [],
                  push_enabled: true,
                },
              ],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_issuer')) {
        expect(params).toEqual([SITE_ID, issuer, issuedAt, expiresAt]);
        return { rows: [] };
      }

      if (sql.includes('FROM notification_methods') && sql.includes("notification_type = 'push'")) {
        expect(params).toEqual([USER_ID]);
        return { rows: [] };
      }

      if (sql.includes('INSERT INTO alert_history')) {
        expect(params[2]).toBe('certificate_expiring');
        expect(params[4]).toEqual(['app', 'push']);
        return { rows: [{ alert_id: '77777777-7777-4777-8777-777777777777' }] };
      }

      if (sql.includes('UPDATE site_alert_conditions')) {
        expect(sql).toContain('last_notified_at = now()');
        expect(params).toEqual([CONDITION_ID, expiresAt]);
        return { rows: [] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(deliverNotifications).toHaveBeenCalledOnce();
    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 1,
      results: [{ siteId: SITE_ID, ok: true, alertsCreated: 1 }],
    });
  });

  it('notifies again when a new certificate expiry is observed', async () => {
    const issuer = 'C = US, O = Example CA, CN = Example Root';
    const issuedAt = new Date('2026-01-01T00:00:00.000Z');
    const previousExpiresAt = new Date('2026-05-30T00:00:00.000Z');
    const expiresAt = new Date(Date.now() + 11.5 * 60 * 60 * 1000);

    getCertificateExpiry.mockResolvedValue({
      issuer,
      issuedAt,
      expiresAt,
      hoursUntilExpiry: 12,
    });
    deliverNotifications.mockResolvedValue({
      webhook: [],
      push: { ok: false, skipped: true },
    });

    mocks.client.query.mockImplementation(async (sql, params) => {
      if (sql.includes('FROM sites s') && sql.includes('LEFT JOIN site_alert_conditions')) {
        return {
          rows: [
            {
              site_id: SITE_ID,
              user_id: USER_ID,
              url: 'https://example.com/',
              alias: 'Example',
              conditions: [
                {
                  site_alert_condition_id: CONDITION_ID,
                  threshold_hours: 12,
                  webhook_method_ids: [],
                  push_enabled: false,
                  last_notified_certificate_expires_at: previousExpiresAt,
                },
              ],
            },
          ],
        };
      }

      if (sql.includes('SET certificate_issuer')) {
        expect(params).toEqual([SITE_ID, issuer, issuedAt, expiresAt]);
        return { rows: [] };
      }

      if (sql.includes('INSERT INTO alert_history')) {
        expect(params[2]).toBe('certificate_expiring');
        expect(params[4]).toEqual(['app']);
        return { rows: [{ alert_id: '77777777-7777-4777-8777-777777777777' }] };
      }

      if (sql.includes('UPDATE site_alert_conditions')) {
        expect(params).toEqual([CONDITION_ID, expiresAt]);
        return { rows: [] };
      }

      throw new Error(`Unexpected query: ${sql}`);
    });

    const result = await runCertificateMonitoring({ concurrency: 1 });

    expect(deliverNotifications).toHaveBeenCalledOnce();
    expect(result).toMatchObject({
      checkedSites: 1,
      alertsCreated: 1,
      results: [{ siteId: SITE_ID, ok: true, alertsCreated: 1 }],
    });
  });
});