package main

import (
	"log"
	"net/http"
	"sync"

	"github.com/google/uuid"
	"github.com/gorilla/websocket"
)

type WS struct {
	upgrader websocket.Upgrader
	pools    *sync.Map
}

func NewWS() *WS {
	return &WS{
		upgrader: websocket.Upgrader{
			ReadBufferSize:  16384,
			WriteBufferSize: 16384,
			CheckOrigin:     func(_ *http.Request) bool { return true },
		},
		pools: &sync.Map{},
	}
}

func (ws *WS) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	if err := ws.serveHTTP(w, r); err != nil {
		log.Println(r.URL.Path, err)
		http.Error(w, err.Error(), http.StatusInternalServerError)
	}
}

func (ws *WS) serveHTTP(w http.ResponseWriter, r *http.Request) error {
	id := getCookie(r, "id")
	if len(id) == 0 {
		id = uuid.New().String()
	}
	log.Println("found id", id)
	log.Println("ws serve http", r.URL.Path)
	pooli, ok := ws.pools.Load(r.URL.Path)
	if !ok {
		pooli = NewPool()
		ws.pools.Store(r.URL.Path, pooli.(*Pool))
	}
	pool := pooli.(*Pool)
	conn, err := ws.upgrader.Upgrade(w, r, nil)
	if err != nil {
		return err
	}
	pool.Push(id, conn) // conns.Store(id, conn)
	for {
		mt, reader, err := conn.NextReader()
		if err != nil {
			return err
		}
		if err := pool.Broadcast(mt, reader); err != nil {
			return err
		}
	}
}