package http

import (
	"context"
	"crypto/rand"
	"encoding/hex"
	"errors"
	"net/http"
	"time"
)

type Server struct {
	srv *http.Server
}

func NewServer(addr string) *Server {
	srv := http.Server{
		ReadTimeout:       time.Second * 3,
		WriteTimeout:      time.Second * 3,
		IdleTimeout:       time.Second * 2,
		ReadHeaderTimeout: time.Second * 3,
		Addr:              addr,
	}

	return &Server{
		srv: &srv,
	}
}

func (s *Server) RegisterHandler(h http.Handler) {
	s.srv.Handler = h
}

func (s *Server) Run() error {
	err := s.srv.ListenAndServe()
	if errors.Is(err, http.ErrServerClosed) {
		return nil
	}

	return err
}

func (s *Server) Close() error {
	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
	defer cancel()

	return s.srv.Shutdown(ctx)
}

func randomID() string {
	var randombuffer [4]byte
	_, _ = rand.Read(randombuffer[:])

	return hex.EncodeToString(randombuffer[:])
}