package server

import (
	"log"
	"net/http"
)

type Server struct {
	sessions []*session
}

func NewServer() *Server {
	return &Server{}
}

func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	switch r.URL.Path {
	case "/ws":
		if err := s.WS(w, r); err != nil {
			log.Println("[ws]", err)
		}
	default:
		http.FileServer(http.Dir("./src/public")).ServeHTTP(w, r)
	}
}

func (s *Server) WS(w http.ResponseWriter, r *http.Request) error {
	sess, err := newSession(w, r, nil)
	if err != nil {
		return err
	}
	defer sess.Close()

	sess.cb = func(m message) error {
		for i := range s.sessions {
			if s.sessions[i].id != sess.id {
				select {
				case s.sessions[i].scatterc <- m:
				case <-s.sessions[i].ctx.Done():
				}
			}
		}
		return nil
	}

	s.sessions = append(s.sessions, sess)
	defer func() {
		for i := range s.sessions {
			if s.sessions[i].id == sess.id {
				s.sessions = append(s.sessions[:i], s.sessions[i+1:]...)
				return
			}
		}
	}()

	return sess.Run()
}