package service

import (
	"encoding/base64"
	"encoding/json"
	"fmt"
	"net"
	"strings"

	"be.ems/src/framework/config"
	"be.ems/src/framework/logger"
	"be.ems/src/framework/socket"
	"be.ems/src/framework/utils/date"
	"be.ems/src/framework/utils/parse"
	neFetchlink "be.ems/src/modules/network_element/fetch_link"
	neService "be.ems/src/modules/network_element/service"
	"be.ems/src/modules/trace/model"
	"be.ems/src/modules/trace/repository"
	wsService "be.ems/src/modules/ws/service"
)

// 实例化数据层 TraceTask 结构体
var NewTraceTask = &TraceTask{
	udpService:          socket.SocketUDP{},
	traceTaskRepository: repository.NewTraceTask,
	traceDataRepository: repository.NewTraceData,
}

// TraceTask 跟踪任务 服务层处理
type TraceTask struct {
	// UDP服务对象
	udpService socket.SocketUDP
	// 跟踪_任务数据信息
	traceTaskRepository *repository.TraceTask
	// 跟踪_数据信息
	traceDataRepository *repository.TraceData
}

// CreateUDP 创建UDP数据通道
func (r *TraceTask) CreateUDP() error {
	// 跟踪配置是否开启
	if v := config.Get("trace.enabled"); v != nil {
		if !v.(bool) {
			return nil
		}
	}
	host := "127.0.0.1"
	if v := config.Get("trace.host"); v != nil {
		host = v.(string)
	}
	var port int64 = 33033
	if v := config.Get("trace.port"); v != nil {
		port = parse.Number(v)
	}

	// 初始化UDP服务
	r.udpService = socket.SocketUDP{Addr: host, Port: port}
	if _, err := r.udpService.New(); err != nil {
		return err
	}

	// 接收处理UDP数据
	go r.udpService.Resolve(func(conn *net.UDPConn) {
		// 读取数据
		buf := make([]byte, 2048)
		n, err := conn.Read(buf)
		if err != nil {
			logger.Errorf("error reading from UDP connection: %s", err.Error())
			return
		}

		logger.Infof("socket UDP: %s", string(buf[:n]))
		// logger.Infof("socket UDP Base64: %s", base64.StdEncoding.EncodeToString(buf[:n]))
		mData, err := UDPDataHandler(buf, n)
		if err != nil {
			logger.Errorf("udp resolve data fail: %s", err.Error())
			return
		}
		taskId := parse.Number(mData["taskId"])

		// 插入数据库做记录
		r.traceDataRepository.Insert(model.TraceData{
			TaskId:    taskId,
			IMSI:      mData["imsi"].(string),
			SrcAddr:   mData["srcAddr"].(string),
			DstAddr:   mData["dstAddr"].(string),
			IfType:    parse.Number(mData["ifType"]),
			MsgType:   parse.Number(mData["msgType"]),
			MsgDirect: parse.Number(mData["msgDirect"]),
			Length:    parse.Number(mData["dataLen"]),
			RawMsg:    mData["dataInfo"].(string),
			Timestamp: parse.Number(mData["timestamp"]),
			DecMsg:    mData["decMsg"].(string),
		})

		// 推送文件
		if v, ok := mData["pcapFile"]; ok && v != "" {
			logger.Infof("pcapFile: %s", v)
			wsService.NewWSSend.ByGroupID(fmt.Sprintf("%s%d", wsService.GROUP_TRACE_NE, taskId), taskId)
		}
	})

	// ============ 测试接收网元UDP发过来的数据
	// 初始化TCP服务 后续调整TODO
	tcpService := socket.SocketTCP{Addr: host, Port: port + 1}
	if _, err := tcpService.New(); err != nil {
		return err
	}
	// 接收处理TCP数据
	go tcpService.Resolve(func(conn *net.Conn) {
		c := (*conn)
		// 读取数据
		buf := make([]byte, 2048)
		n, err := c.Read(buf)
		if err != nil {
			logger.Errorf("error reading from TCP connection: %s", err.Error())
			return
		}

		logger.Infof("socket TCP: %s", string(buf[:n]))
		deData, _ := base64.StdEncoding.DecodeString(string(buf[:n]))
		logger.Infof("socket TCP Base64: %s", deData)
		mData, err := UDPDataHandler(deData, len(deData))
		if err != nil {
			logger.Errorf("tcp resolve data fail: %s", err.Error())
			return
		}
		taskId := parse.Number(mData["taskId"])

		// 插入数据库做记录
		r.traceDataRepository.Insert(model.TraceData{
			TaskId:    taskId,
			IMSI:      mData["imsi"].(string),
			SrcAddr:   mData["srcAddr"].(string),
			DstAddr:   mData["dstAddr"].(string),
			IfType:    parse.Number(mData["ifType"]),
			MsgType:   parse.Number(mData["msgType"]),
			MsgDirect: parse.Number(mData["msgDirect"]),
			Length:    parse.Number(mData["dataLen"]),
			RawMsg:    mData["dataInfo"].(string),
			Timestamp: parse.Number(mData["timestamp"]),
			DecMsg:    mData["decMsg"].(string),
		})

		// 推送文件
		if v, ok := mData["pcapFile"]; ok && v != "" {
			logger.Infof("pcapFile: %s", v)
			wsService.NewWSSend.ByGroupID(fmt.Sprintf("%s%d", wsService.GROUP_TRACE_NE, taskId), taskId)
		}
	})
	return nil
}

// CloseUDP 关闭UDP数据通道
func (r *TraceTask) CloseUDP() {
	r.udpService.Close()
}

// SelectPage 根据条件分页查询
func (r *TraceTask) SelectPage(query map[string]any) map[string]any {
	return r.traceTaskRepository.SelectPage(query)
}

// SelectById 通过ID查询
func (r *TraceTask) SelectById(id string) model.TraceTask {
	tasks := r.traceTaskRepository.SelectByIds([]string{id})
	if len(tasks) > 0 {
		return tasks[0]
	}
	return model.TraceTask{}
}

// Insert 新增信息
func (r *TraceTask) Insert(task model.TraceTask) error {
	// 跟踪配置是否开启
	if v := config.Get("trace.enabled"); v != nil {
		if !v.(bool) {
			return fmt.Errorf("tracking is not enabled")
		}
	}
	host := "127.0.0.1"
	if v := config.Get("trace.host"); v != nil {
		host = v.(string)
	}
	var port int64 = 33033
	if v := config.Get("trace.port"); v != nil {
		port = parse.Number(v)
	}
	task.NotifyUrl = fmt.Sprintf("udp:%s:%d", host, port)

	// 查询网元获取IP
	neInfo := neService.NewNeInfo.SelectNeInfoByNeTypeAndNeID(task.NeType, task.NeId)
	if neInfo.NeId != task.NeId || neInfo.IP == "" {
		return fmt.Errorf("app.common.noNEInfo")
	}
	traceId := r.traceTaskRepository.LastID() + 1 // 生成任务ID < 65535
	task.TraceId = fmt.Sprint(traceId)

	// 发送任务给网元
	data := map[string]any{
		"neType":    neInfo.NeType,
		"neId":      neInfo.NeId,
		"notifyUrl": task.NotifyUrl,
		"id":        traceId,
		"startTime": date.ParseDateToStr(task.StartTime, date.YYYY_MM_DD_HH_MM_SS),
		"endTime":   date.ParseDateToStr(task.EndTime, date.YYYY_MM_DD_HH_MM_SS),
	}
	switch task.TraceType {
	case "1": // Interface
		data["traceType"] = "Interface"
		data["interfaces"] = strings.Split(task.Interfaces, ",")
	case "2": // Device
		data["traceType"] = "Device"
		data["ueIp"] = task.UeIp
		data["srcIp"] = task.SrcIp
		data["dstIp"] = task.DstIp
		data["signalPort"] = task.SignalPort
		task.UeIp = neInfo.IP
	case "3": // UE
		data["traceType"] = "UE"
		data["imsi"] = task.IMSI
		data["msisdn"] = task.MSISDN
	default:
		return fmt.Errorf("trace type is not disabled")
	}
	msg, err := neFetchlink.NeTraceAdd(neInfo, data)
	if err != nil {
		return err
	}
	s, _ := json.Marshal(msg)
	task.FetchMsg = string(s)

	// 插入数据库
	r.traceTaskRepository.Insert(task)
	return nil
}

// Update 修改信息
func (r *TraceTask) Update(task model.TraceTask) error {
	// 跟踪配置是否开启
	if v := config.Get("trace.enabled"); v != nil {
		if !v.(bool) {
			return fmt.Errorf("tracking is not enabled")
		}
	}
	host := "127.0.0.1"
	if v := config.Get("trace.host"); v != nil {
		host = v.(string)
	}
	var port int64 = 33033
	if v := config.Get("trace.port"); v != nil {
		port = parse.Number(v)
	}
	task.NotifyUrl = fmt.Sprintf("udp:%s:%d", host, port)

	// 查询网元获取IP
	neInfo := neService.NewNeInfo.SelectNeInfoByNeTypeAndNeID(task.NeType, task.NeId)
	if neInfo.NeId != task.NeId || neInfo.IP == "" {
		return fmt.Errorf("app.common.noNEInfo")
	}

	// 查询网元任务信息
	if msg, err := neFetchlink.NeTraceInfo(neInfo, task.TraceId); err == nil {
		s, _ := json.Marshal(msg)
		task.FetchMsg = string(s)
		// 修改任务信息
		data := map[string]any{
			"neType":    neInfo.NeType,
			"neId":      neInfo.NeId,
			"notifyUrl": task.NotifyUrl,
			"id":        parse.Number(task.TraceId),
			"startTime": date.ParseDateToStr(task.StartTime, date.YYYY_MM_DD_HH_MM_SS),
			"endTime":   date.ParseDateToStr(task.EndTime, date.YYYY_MM_DD_HH_MM_SS),
		}
		switch task.TraceType {
		case "1": // Interface
			data["traceType"] = "Interface"
			data["interfaces"] = strings.Split(task.Interfaces, ",")
		case "2": // Device
			task.UeIp = neInfo.IP
			data["traceType"] = "Device"
			data["ueIp"] = task.UeIp
			data["srcIp"] = task.SrcIp
			data["dstIp"] = task.DstIp
			data["signalPort"] = task.SignalPort
		case "3": // UE
			data["traceType"] = "UE"
			data["imsi"] = task.IMSI
			data["msisdn"] = task.MSISDN
		default:
			return fmt.Errorf("trace type is not disabled")
		}
		neFetchlink.NeTraceEdit(neInfo, data)
	}

	// 更新数据库
	r.traceTaskRepository.Update(task)
	return nil
}

// DeleteByIds 批量删除信息
func (r *TraceTask) DeleteByIds(ids []string) (int64, error) {
	// 检查是否存在
	rows := r.traceTaskRepository.SelectByIds(ids)
	if len(rows) <= 0 {
		return 0, fmt.Errorf("not data")
	}

	if len(rows) == len(ids) {
		// 停止任务
		for _, v := range rows {
			neInfo := neService.NewNeInfo.SelectNeInfoByNeTypeAndNeID(v.NeType, v.NeId)
			if neInfo.NeId != v.NeId || neInfo.IP == "" {
				continue
			}
			neFetchlink.NeTraceDelete(neInfo, v.TraceId)
		}
		num := r.traceTaskRepository.DeleteByIds(ids)
		return num, nil
	}
	// 删除信息失败！
	return 0, fmt.Errorf("delete fail")
}