import { getQueue, type QueueName } from './index';
import { logger } from '@/lib/logger';

interface RecurringJobDef {
  queue: QueueName;
  name: string;
  pattern: string;
}

/**
 * Register all recurring jobs from 11-REALTIME-AND-BACKGROUND-JOBS.md Section 3.2.
 * Called once on server startup.
 */
export async function registerRecurringJobs(): Promise<void> {
  const recurring: RecurringJobDef[] = [
    // Documenso signature fallback poll - primary is webhooks, this is the
    // safety net for any missed delivery (cloudflared tunnel hiccup, transient
    // 5xx on our receiver, Documenso quirk). Tightened from 6h to 5m so the
    // user-facing "stuck on partially_signed" symptom only persists for the
    // 5-min window between polls. Cheap query: ~1 GET per in-flight doc.
    { queue: 'documents', name: 'signature-poll', pattern: '*/5 * * * *' },

    // Reminder checks
    { queue: 'notifications', name: 'reminder-check', pattern: '0 * * * *' },
    { queue: 'notifications', name: 'reminder-overdue-check', pattern: '*/15 * * * *' },

    // Google Calendar background sync
    { queue: 'maintenance', name: 'calendar-sync', pattern: '*/30 * * * *' },

    // Daily checks at 08:00
    { queue: 'notifications', name: 'invoice-overdue-check', pattern: '0 8 * * *' },
    { queue: 'notifications', name: 'tenure-expiry-check', pattern: '0 8 * * *' },

    // Exchange rate refresh every 6 hours
    { queue: 'maintenance', name: 'currency-refresh', pattern: '0 */6 * * *' },

    // Database backup / cleanup
    { queue: 'maintenance', name: 'database-backup', pattern: '0 2 * * *' },
    { queue: 'maintenance', name: 'backup-cleanup', pattern: '0 3 * * 0' }, // Sunday 03:00

    // Session cleanup
    { queue: 'maintenance', name: 'session-cleanup', pattern: '0 4 * * *' },

    // Report scheduler - checks every minute for reports due to run
    { queue: 'reports', name: 'report-scheduler', pattern: '* * * * *' },

    // Reports P3 — new-system poll (report_schedules + report_runs).
    // Runs alongside the legacy poll above; the two queues coexist.
    { queue: 'reports', name: 'report-schedules-poll', pattern: '* * * * *' },

    // Notification digest - fires hourly globally; the worker checks each
    // user's `notification_digest_paused_until` and unread-count threshold
    // before composing a digest, so most ticks are no-ops. Per-user time-
    // of-day scheduling is DEFERRED - implementing it requires a product
    // decision on UX (slider? time picker? per-channel toggles?) and adds
    // a per-user cron path that doesn't pay off until enough users are
    // actively customizing it. The hourly bucket aligns with how reps
    // already check inboxes ("on the hour") so the current behavior is
    // operationally acceptable without per-user override. Revisit when
    // a customer asks for digest-time control.
    { queue: 'email', name: 'notification-digest', pattern: '0 * * * *' },

    // Cleanup jobs
    { queue: 'maintenance', name: 'temp-file-cleanup', pattern: '0 5 * * *' },
    { queue: 'maintenance', name: 'form-expiry-check', pattern: '0 * * * *' },

    // Phase B: alert rule engine sweep
    { queue: 'maintenance', name: 'alerts-evaluate', pattern: '*/5 * * * *' },
    // Phase 6: IMAP bounce poller - matches NDRs to document_sends rows
    // and fires email_bounced notifications. No-op when IMAP_* env unset.
    { queue: 'maintenance', name: 'bounce-poll', pattern: '*/15 * * * *' },
    // Phase B: analytics snapshot warm
    { queue: 'maintenance', name: 'analytics-refresh', pattern: '*/15 * * * *' },

    // Phase 3d: GDPR Article 17 - actually delete expired export bundles
    { queue: 'maintenance', name: 'gdpr-export-cleanup', pattern: '0 4 * * *' },
    // Phase 3b: AI usage ledger retention (90-day rolling window)
    { queue: 'maintenance', name: 'ai-usage-retention', pattern: '0 5 * * *' },
    // Migration 0040 contract: error_events older than 90 days get pruned.
    { queue: 'maintenance', name: 'error-events-retention', pattern: '0 6 * * *' },
    // 90-day retention for audit_logs - mirrors error_events. Metadata
    // is masked at insert time but old rows still represent stale PII
    // exposure that has no operational value past the window.
    { queue: 'maintenance', name: 'audit-logs-retention', pattern: '15 6 * * *' },
    // Raw website inquiry payloads - 180-day retention.
    { queue: 'maintenance', name: 'website-submissions-retention', pattern: '0 7 * * *' },
  ];

  // BullMQ defaults `tz` to UTC. The cron patterns above are spelled
  // in port-local time (e.g. "0 8 * * *" = 8 AM local), so without an
  // explicit `tz` the jobs fire in UTC and silently drift across DST
  // - twice a year the local firing time shifts by an hour and admin
  // docs ("daily check at 8 AM") break. datetime-auditor C2.
  //
  // The CRM is single-port today (Port Nimara, Europe/Warsaw); when
  // multi-port admin schedules ship, this should resolve per-job from
  // the owning port's `ports.timezone`. SCHEDULER_TZ overrides for
  // ops debugging without a redeploy.
  const schedulerTz = process.env.SCHEDULER_TZ ?? 'Europe/Warsaw';

  for (const job of recurring) {
    const queue = getQueue(job.queue);
    // Sub-hourly / hourly patterns are TZ-invariant; skip the `tz`
    // option for them so a misconfigured SCHEDULER_TZ can't perturb
    // them.
    const tzInvariant = /^\*|\*\/\d+ \*|^0 \*/.test(job.pattern);
    await queue.upsertJobScheduler(
      job.name,
      { pattern: job.pattern, ...(tzInvariant ? {} : { tz: schedulerTz }) },
      { data: {}, name: job.name },
    );
    logger.info(
      {
        queue: job.queue,
        job: job.name,
        pattern: job.pattern,
        tz: tzInvariant ? 'UTC (invariant)' : schedulerTz,
      },
      'Registered recurring job',
    );
  }

  logger.info({ count: recurring.length }, 'All recurring jobs registered');
}