import { MetricsService } from './metrics.service';

describe('MetricsService', () => {
  it('exports bounded API process and HTTP metrics without raw identifiers', () => {
    const service = new MetricsService();
    const startedAt = service.beginRequest();
    service.finishRequest(startedAt, 'GET', '/api/admin/tenants/:id', 200);
    const inboundStartedAt = service.beginCmppInboundStage();
    service.finishCmppInboundStage(inboundStartedAt, 'application_lookup', 'success');
    const sendStartedAt = service.beginSendWorkerStage();
    service.finishSendWorkerStage(sendStartedAt, 'route_lookup', 'success');
    service.setSendWorkerSlots(20, 3);
    service.setSendWorkerQueueJobs('waiting', 12);
    service.recordSendWorkerResult('completed');
    service.setSendWorkerDatabasePool('max', 8);
    service.setSendWorkerDatabasePool('waiting', 2);
    const output = service.render();

    expect(output).toContain('cmpp_api_process_resident_memory_bytes');
    expect(output).toContain('cmpp_api_http_requests_total{method="GET",route="/api/admin/tenants/:id",status="200"} 1');
    expect(output).toContain('cmpp_api_http_request_duration_seconds_bucket');
    expect(output).toContain('cmpp_api_cmpp_inbound_stage_duration_seconds_count{stage="application_lookup",result="success"} 1');
    expect(output).toContain('cmpp_worker_send_stage_duration_seconds_count{stage="route_lookup",result="success"} 1');
    expect(output).toContain('cmpp_worker_send_slots{state="configured"} 20');
    expect(output).toContain('cmpp_worker_send_slots{state="in_flight"} 3');
    expect(output).toContain('cmpp_worker_send_queue_jobs{state="waiting"} 12');
    expect(output).toContain('cmpp_worker_send_jobs_total{result="completed"} 1');
    expect(output).toContain('cmpp_worker_database_pool_connections{state="max"} 8');
    expect(output).toContain('cmpp_worker_database_pool_connections{state="waiting"} 2');
    expect(output).not.toContain('phone_number');
    expect(output).not.toContain('tenant_id');
    expect(output).not.toContain('channel_id');
    service.onModuleDestroy();
  });
});