package handlers

import (
	"net/http"

	"sneak.berlin/go/dnswatcher/internal/healthcheck"
)

// HandleHealthCheck returns the health check handler. It answers 503
// Service Unavailable when the health check's status is error, so that
// a container health check fails, and 200 OK otherwise.
func (h *Handlers) HandleHealthCheck() http.HandlerFunc {
	return func(
		writer http.ResponseWriter,
		request *http.Request,
	) {
		resp := h.hc.Check()

		code := http.StatusOK
		if resp.Status == healthcheck.StatusError {
			code = http.StatusServiceUnavailable
		}

		h.respondJSON(writer, request, resp, code)
	}
}