package server

import (
	"errors"
	"fmt"
	"net/http"
	"time"
)

const (
	// httpReadTimeout is the maximum duration for reading the
	// entire request, including the body.
	httpReadTimeout = 10 * time.Second

	// httpWriteTimeout is the maximum duration before timing out
	// writes of the response.
	httpWriteTimeout = 10 * time.Second

	// httpMaxHeaderBytes is the maximum number of bytes the
	// server will read parsing the request headers.
	httpMaxHeaderBytes = 1 << 20
)

func (s *Server) serveUntilShutdown() {
	listenAddr := fmt.Sprintf(":%d", s.params.Config.Port)
	s.httpServer = &http.Server{
		Addr:           listenAddr,
		ReadTimeout:    httpReadTimeout,
		WriteTimeout:   httpWriteTimeout,
		MaxHeaderBytes: httpMaxHeaderBytes,
		Handler:        s,
	}

	// add routes
	// this does any necessary setup in each handler
	s.SetupRoutes()

	s.log.Info("http begin listen", "listenaddr", listenAddr)

	err := s.httpServer.ListenAndServe()
	if err != nil && !errors.Is(err, http.ErrServerClosed) {
		s.log.Error("listen error", "error", err)

		if s.cancelFunc != nil {
			s.cancelFunc()
		}
	}
}

// ServeHTTP delegates to the router.
func (s *Server) ServeHTTP(
	w http.ResponseWriter,
	r *http.Request,
) {
	s.router.ServeHTTP(w, r)
}