package handlers

import (
	"net/http"

	"github.com/prometheus/client_golang/prometheus/promhttp"
)

// HandleMetrics returns the Prometheus scrape handler for the
// registry every collector in this process registers on. It is what
// promhttp.Handler builds for the global default registry, including
// the promhttp_metric_handler_* series that count scrapes, pointed at
// that registry instead.
func (s *Handlers) HandleMetrics() http.HandlerFunc {
	reg := s.params.Registry

	return promhttp.InstrumentMetricHandler(
		reg, promhttp.HandlerFor(reg, promhttp.HandlerOpts{}),
	).ServeHTTP
}