import logging
from prometheus_fastapi_instrumentator import Instrumentator
from common.config.app_settings import app_settings

def register(app):
  instrumentator = Instrumentator().instrument(app, 
                                               metric_namespace="freeleaps", 
                                               metric_subsystem=app_settings.APP_NAME)

  @app.on_event("startup")
  async def startup():
    instrumentator.expose(app, endpoint="/api/_/metrics", should_gzip=True)
    logging.info("Metrics endpoint exposed at /api/_/metrics")