package group

import (
	"errors"
	"github.com/redis/go-redis/v9"
	"sonet/pkg/protocol/session"
	"sonet/pkg/utils/logger"
	"sync"
)

var ErrNotExists = errors.New("not exists")

// PostalDao persistent postal group api
// 1.uid online, send online event
// 2.onOnlineEvent: chat -> chat groups to postal, game -> game groups to postal
// 2.postal create  uid create or join memory group linkedList
// 3.postalA: gid-1(uid1, uid2, uid3); postalB: gid1(uid4, uid5, uid6)
// extra: room bit位判断是否存在
type PostalDao interface {
	LoadGroupIdsByUid(uid string) ([]string, error)
	GroupCreate(gid string) (string, error)
	GroupJoin(gid, uid string) error
	GroupLeave(gid, uid string) error
	GroupDismiss(gid string) error
}

type RedisPostalDao struct {
	rdb *redis.Client
}

func (d *RedisPostalDao) LoadGroupIdsByUid(uid string) (gids []string, err error) {
	return
}

// Group 群组
type Group struct {
	sync.RWMutex
	Gid  string
	uids map[string]session.NetConn
}

func NewGroup(gid string) *Group {
	return &Group{
		Gid:  gid,
		uids: make(map[string]session.NetConn),
	}
}

func (g *Group) Write(data []byte) {
	g.RLock()
	defer g.RUnlock()
	for uid, conn := range g.uids {
		if err := conn.Write(data); err != nil {
			logger.Errorf("group send %s.%s error: ", g.Gid, uid, err)
		}
	}
}

func (g *Group) Join(uid string, conn session.NetConn) {
	g.Lock()
	defer g.Unlock()
	g.uids[uid] = conn
}

// Leave delete uid
func (g *Group) Leave(uid string) {
	g.Lock()
	defer g.Unlock()
	delete(g.uids, uid)
}

// Dismiss 解散
func (g *Group) Dismiss() {

}

func (g *Group) Load(uid string) (conn session.NetConn, ok bool) {
	g.RLock()
	defer g.RUnlock()
	conn, ok = g.uids[uid]
	return
}