package xhttp

import (
	"context"
	"fmt"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	//"golang.org/x/net/http2"
)

func run(addr string, router http.Handler, option ServerOption) (errs, err error) {
	s := &http.Server{
		Addr:              addr,
		Handler:           router,
		ReadTimeout:       option.ReadTimeout,
		ReadHeaderTimeout: option.ReadHeaderTimeout,
		WriteTimeout:      option.WriteTimeout,
		IdleTimeout:       option.IdleTimeout,
		MaxHeaderBytes:    option.MaxHeaderBytes,
	}

	errc := make(chan error)
	go func() {
		c := make(chan os.Signal, 1)
		signal.Notify(c, syscall.SIGHUP, syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM)
		errc <- fmt.Errorf("%s", <-c)
	}()

	go func() {
		if len(option.CertFile) > 0 && len(option.KeyFile) > 0 {
			/*
				http2.VerboseLogs = false
				http2.ConfigureServer(s, nil)
				// */
			errs = s.ListenAndServeTLS(option.CertFile, option.KeyFile)
		} else {
			errs = s.ListenAndServe()
		}
		errc <- errs
	}()

	err = <-errc
	ctx, cancel := context.WithTimeout(context.Background(), option.ShutdownTimeout)
	defer cancel()
	s.Shutdown(ctx)
	return
}

// ListenAndServe new server and start
func ListenAndServe(addr string, router http.Handler, option ServerOption) (es, e error) {
	return run(addr, router, option)
}

// ListenAndServeV2 new http2 server and start
func ListenAndServeV2(addr string, router http.Handler, option ServerOption) (es, e error) {
	return run(addr, router, option)
}