package core

import (
	"git.noahlan.cn/noahlan/nnet/entity"
	"sync"
	"sync/atomic"
)

type session struct {
	sync.RWMutex // 数据锁

	// 网络单元
	entity entity.NetworkEntity

	id   int64                  // Session全局唯一ID
	uid  string                 // 用户ID，不绑定的情况下与sid一致
	data map[string]interface{} // session数据存储（内存）
}

func newSession(entity entity.NetworkEntity, id int64) *session {
	return &session{
		id:     id,
		entity: entity,
		uid:    "",
		data:   make(map[string]interface{}),
	}
}

// ID 获取 session ID
func (s *session) ID() int64 {
	return s.id
}

// UID 获取UID
func (s *session) UID() string {
	return s.uid
}

// Bind 绑定uid
func (s *session) Bind(uid string) {
	s.uid = uid
}

// Attribute 获取指定key对应参数
func (s *session) Attribute(key string) interface{} {
	s.RLock()
	defer s.RUnlock()

	return s.data[key]
}

// Keys 获取所有参数key
func (s *session) Keys() []string {
	s.RLock()
	defer s.RUnlock()

	keys := make([]string, 0, len(s.data))
	for k := range s.data {
		keys = append(keys, k)
	}
	return keys
}

// Exists 指定key是否存在
func (s *session) Exists(key string) bool {
	s.RLock()
	defer s.RUnlock()

	_, has := s.data[key]
	return has
}

// Attributes 获取所有参数
func (s *session) Attributes() map[string]interface{} {
	s.RLock()
	defer s.RUnlock()

	return s.data
}

// RemoveAttribute 移除指定key对应参数
func (s *session) RemoveAttribute(key string) {
	s.Lock()
	defer s.Unlock()

	delete(s.data, key)
}

// SetAttribute 设置参数
func (s *session) SetAttribute(key string, value interface{}) {
	s.Lock()
	defer s.Unlock()

	s.data[key] = value
}

// Invalidate 清理
func (s *session) Invalidate() {
	s.Lock()
	defer s.Unlock()

	s.id = 0
	s.uid = ""
	s.data = make(map[string]interface{})
}

// Close 关闭
func (s *session) Close() {
	//s.entity.Close()
	s.Invalidate()
}

type sessionIDMgr struct {
	count int64
	sid   int64
}

func newSessionIDMgr() *sessionIDMgr {
	return &sessionIDMgr{}
}

// Increment the connection count
func (c *sessionIDMgr) Increment() {
	atomic.AddInt64(&c.count, 1)
}

// Decrement the connection count
func (c *sessionIDMgr) Decrement() {
	atomic.AddInt64(&c.count, -1)
}

// Count returns the connection numbers in current
func (c *sessionIDMgr) Count() int64 {
	return atomic.LoadInt64(&c.count)
}

// Reset the connection service status
func (c *sessionIDMgr) Reset() {
	atomic.StoreInt64(&c.count, 0)
	atomic.StoreInt64(&c.sid, 0)
}

// SessionID returns the session id
func (c *sessionIDMgr) SessionID() int64 {
	return atomic.AddInt64(&c.sid, 1)
}