package core

import (
	"errors"
	"github.com/aceld/zinx/zlog"
	"omc/db"
	"omc/model"
	"omc/omc"
	"omc/service"
	"strings"
	"sync"
	"time"
)

/*
ChannelManager 通道管理管理模块
*/
type ChannelManager struct {
	Name       string
	User       map[string]*User //当前在线的User集合
	BindFlag   string           //bind 的网元标识，ne_type#ne_id 格式
	Province   string           //网元所在省份
	DeviceCode string           //主机编码 四位，每1位可用0-9、A-Z编码
	AlarmSeq   int32            //当前告警的序列号
	pLock      sync.RWMutex     //保护User的互斥读写机制
}

// MgrObj 多个通道管理模块集合
var MgrObj []*ChannelManager

// NewManager New 提供ChannelManager 初始化 方法
func NewManager(name, bind, province, deviceCode string) *ChannelManager {
	newManager := ChannelManager{
		Name:       name,
		BindFlag:   bind,
		Province:   province,
		DeviceCode: deviceCode,
		User:       make(map[string]*User),
	}
	MgrObj = append(MgrObj, &newManager)
	return &newManager
}

func GetManager(name string) *ChannelManager {
	for i := range MgrObj {
		if MgrObj[i].Name == name {
			return MgrObj[i]
		}
	}
	return nil
}

// AddUser 提供添加一个user的功能
func (wm *ChannelManager) AddUser(User *User) {
	//将User添加到 世界管理器中
	wm.pLock.Lock()
	wm.User[User.UID] = User
	wm.pLock.Unlock()
}

// Talk User广播消息
func (wm *ChannelManager) Talk(msgID uint32, msg []byte) {
	//2. 得到所有的在线user
	users := wm.GetAllUser()

	//3. 向所有的user发送消息
	for _, user := range users {
		if user.LoginState && user.AlarmType == omc.MSG {
			user.SendMsg(msgID, msg)
		}
	}
}

// LoginSuccess  登录成功管理
func (wm *ChannelManager) LoginSuccess(UID, name, tp string) error {
	wm.pLock.Lock()
	defer wm.pLock.Unlock()
	//判断是否重复登录
	for _, v := range wm.User {
		if v.UserName == name && v.AlarmType == tp && v.LoginState == true {
			return errors.New("repeat login for the same account")
		}
	}
	user, ok := wm.User[UID]
	if !ok {
		return errors.New("server internal error")
	}
	user.UserName = name
	user.AlarmType = tp
	user.LoginState = true
	wm.User[UID] = user
	return nil
}

// SetSeqNo 设置登录随机码
func (wm *ChannelManager) SetSeqNo(UID, seqNo string) error {
	wm.pLock.Lock()
	defer wm.pLock.Unlock()
	//判断是否重复登录
	user, ok := wm.User[UID]
	if !ok {
		return errors.New("server internal error")
	}
	user.SeqNo = seqNo
	return nil
}

// LoginFail 登录失败管理
func (wm *ChannelManager) LoginFail(UID string) (bool, error) {
	wm.pLock.Lock()
	defer wm.pLock.Unlock()
	//判断是否重复登录
	user, ok := wm.User[UID]
	if !ok {
		return true, errors.New("server internal error")
	}
	user.LoginCount++
	wm.User[UID] = user
	if user.LoginCount >= 3 {
		return true, errors.New("too many attempts, close connect")
	}
	return false, nil
}

// RemoveUserByPID 从信息表中移除一个user
func (wm *ChannelManager) RemoveUserByPID(uid string) {
	wm.pLock.Lock()
	delete(wm.User, uid)
	wm.pLock.Unlock()
}

// GetUserByPID  通过user ID 获取对应user信息
func (wm *ChannelManager) GetUserByPID(uID string) *User {
	wm.pLock.RLock()
	defer wm.pLock.RUnlock()

	return wm.User[uID]
}

// GetAllUser 获取所有user的信息
func (wm *ChannelManager) GetAllUser() []*User {
	wm.pLock.RLock()
	defer wm.pLock.RUnlock()

	//创建返回的User集合切片
	User := make([]*User, 0)

	//添加切片
	for _, v := range wm.User {
		if v.LoginState && v.AlarmType == omc.MSG {
			User = append(User, v)
		}
	}

	//返回
	return User
}

func (wm *ChannelManager) RealTimeAlarm() {
	for {
		wm.pLock.RLock()
		//查询
		var newAlarmSeq = wm.AlarmSeq
		var alarms []service.OmcAlarm
		neBind, _ := ConvertBindFlag(wm.BindFlag)
		if wm.AlarmSeq == 0 {
			newAlarmSeq = service.GetLastAlarmSeq(neBind.NeType, neBind.NeId)

		} else {
			ams, err := service.GetRealTimeAlarm(neBind.NeType, neBind.NeId, wm.AlarmSeq)
			if err != nil {
				zlog.Ins().ErrorF("db error %s", err)
			}
			alarms = ams
		}
		//上报实时告警信息
		if len(alarms) > 0 {
			go wm.SendAlarm(alarms)
			newAlarmSeq = service.MaxAlarm(newAlarmSeq, alarms) + 1
		}
		var users []string
		for _, user := range wm.User {
			if user.LoginState && user.AlarmType == omc.MSG {
				userInfo := strings.Join([]string{user.UserName, user.RemoteIp}, ";")
				users = append(users, userInfo)
			}
		}

		//更新AlarmSeq
		wm.AlarmSeq = newAlarmSeq
		wm.pLock.RUnlock()

		//记录日志到alarm 日志表
		for _, v := range alarms {
			for _, u := range users {
				var alarmLog model.NbiAlarmLog
				ui := strings.Split(u, ";")
				if len(ui) == 2 {
					alarmLog.OpUser = ui[0]
					alarmLog.SrcIp = ui[1]
				}
				alarmLog.NeType = v.NeType
				alarmLog.NeId = v.NeUID
				alarmLog.AlarmSeq = int64(v.AlarmSeq)
				alarmLog.AlarmId = v.AlarmId
				et, _ := time.Parse("2006-01-02 15:04:05", v.EventTime)
				alarmLog.EventTime = et
				alarmLog.LogTime = time.Now()
				alarmLog.AId = v.AId

				db.Client.Create(&alarmLog)
			}
		}
		time.Sleep(3 * time.Second)
	}
}

func (wm *ChannelManager) SendAlarm(alarms []service.OmcAlarm) error {
	for _, v := range alarms {
		//生产告警内容
		data := service.GenAlarm(v)
		//发送告警内容
		wm.Talk(omc.RealTimeAlarm, data)
	}
	return nil
}

func (wm *ChannelManager) UpdateAlarmSeq(newSeq int32) {
	wm.pLock.Lock()
	wm.AlarmSeq = newSeq
	wm.pLock.Unlock()
}