package trace

import (
	"fmt"
	"net/http"
	"time"

	"ems.agt/lib/core/cmd"
	"ems.agt/lib/core/conf"
	"ems.agt/lib/core/file"
	"ems.agt/lib/core/utils/ctx"
	"ems.agt/lib/core/vo/result"
	"ems.agt/lib/dborm"
	"ems.agt/lib/log"
	"ems.agt/restagent/config"
)

var (
	UriTcpdumpTask       = config.DefaultUriPrefix + "/traceManagement/{apiVersion}/tcpdumpNeTask"
	CustomUriTcpdumpTask = config.UriPrefix + "/traceManagement/{apiVersion}/tcpdumpNeTask" // decode message api

	UriTcpdumpPcapDownload       = config.DefaultUriPrefix + "/traceManagement/{apiVersion}/tcpdumpPcapDownload"
	CustomUriTcpdumpPcapDownload = config.UriPrefix + "/traceManagement/{apiVersion}/tcpdumpPcapDownload" // decode message api
)

// NeInfo 网元信息
func NeInfo(neType, neId string) (*dborm.NeInfo, error) {
	neInfo, err := dborm.XormGetNeInfo(neType, neId)
	if err != nil {
		log.Error("dborm.XormGetNeInfo is failed:", err)
		return nil, err
	}
	if neInfo == nil || neInfo.Ip == "" {
		return nil, fmt.Errorf("not ne_info or not IP")
	}
	return neInfo, nil
}

// TcpdumpNeTask 网元发送执行 pcap
func TcpdumpNeTask(w http.ResponseWriter, r *http.Request) {
	var body struct {
		NeType  string `json:"neType"`  // 网元类型
		NeId    string `json:"neId"`    // 网元ID
		Timeout int    `json:"timeout"` // 超时时间
		Cmd     string `json:"cmd"`     // 命令
	}
	err := ctx.ShouldBindJSON(r, &body)
	if err != nil || body.NeType == "" || body.NeId == "" || body.Timeout < 5 || body.Cmd == "" {
		ctx.JSON(w, 400, result.CodeMsg(400, "参数错误"))
		return
	}

	neInfo, err := NeInfo(body.NeType, body.NeId)
	if err != nil {
		ctx.JSON(w, 200, result.ErrMsg(err.Error()))
		return
	}

	filePcapName := fmt.Sprintf("tmp_%s_%s_%d.pcap", body.NeType, body.NeId, time.Now().UnixMilli())
	fileLogName := fmt.Sprintf("tmp_%s_%s_%d.log", body.NeType, body.NeId, time.Now().UnixMilli())
	cmdStr := fmt.Sprintf("cd /tmp \n timeout %d tcpdump -i any %s -s0 -w %s >> %s 2>&1 \n cat %s", body.Timeout, body.Cmd, filePcapName, fileLogName, fileLogName)
	usernameNe := conf.Get("ne.user").(string) // 网元统一用户
	sshHost := fmt.Sprintf("%s@%s", usernameNe, neInfo.Ip)
	msg, err := cmd.ExecWithCheck("ssh", sshHost, cmdStr)
	if err != nil {
		ctx.JSON(w, 200, result.ErrMsg(err.Error()))
		return
	}

	ctx.JSON(w, 200, result.OkData(map[string]any{
		"msg":      msg,
		"fileName": filePcapName,
	}))
}

// TcpdumpPcapDownload 网元抓包pcap文件下载
func TcpdumpPcapDownload(w http.ResponseWriter, r *http.Request) {
	var body struct {
		NeType   string `json:"neType"`   // 网元类型
		NeId     string `json:"neId"`     // 网元ID
		FileName string `json:"fileName"` // 文件名
	}
	err := ctx.ShouldBindJSON(r, &body)
	if err != nil || body.NeType == "" || body.NeId == "" || body.FileName == "" {
		ctx.JSON(w, 400, result.CodeMsg(400, "参数错误"))
		return
	}

	neInfo, err := NeInfo(body.NeType, body.NeId)
	if err != nil {
		ctx.JSON(w, 200, result.ErrMsg(err.Error()))
		return
	}

	nePath := fmt.Sprintf("/tmp/%s", body.FileName)
	localPath := fmt.Sprintf("%s/tcpdump/pcap/%s", conf.Get("ne.omcdir"), body.FileName)
	err = file.FileSCPNeToLocal(neInfo.Ip, nePath, localPath)
	if err != nil {
		ctx.JSON(w, 200, result.ErrMsg(err.Error()))
		return
	}

	ctx.FileAttachment(w, r, localPath, body.FileName)
}