package ncmd

import "sync"

type Session struct {
	id   int64          // 唯一ID
	data map[string]any // 数据存储

	*sync.RWMutex
}

func NewSession(id int64) *Session {
	return &Session{
		id:      id,
		data:    make(map[string]any),
		RWMutex: &sync.RWMutex{},
	}
}

func (s *Session) Id() int64 {
	return s.id
}

func (s *Session) SetId(id int64) {
	s.id = id
}

// Attribute 获取指定key对应参数
func (s *Session) Attribute(key string) any {
	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]any {
	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 any) {
	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.data = make(map[string]any)
}

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