package controller

import (
	"fmt"
	"os"
	"path/filepath"
	"runtime"
	"strings"

	"be.ems/src/framework/i18n"
	"be.ems/src/framework/utils/ctx"
	"be.ems/src/framework/utils/file"
	"be.ems/src/framework/utils/generate"
	"be.ems/src/framework/utils/ssh"
	"be.ems/src/framework/vo/result"
	neService "be.ems/src/modules/network_element/service"
	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
)

// 实例化控制层 NeActionController 结构体
var NewNeAction = &NeActionController{
	neInfoService: neService.NewNeInfoImpl,
}

// 网元处理请求
//
// PATH /action
type NeActionController struct {
	// 网元信息服务
	neInfoService neService.INeInfo
}

// 发送文件从本地到网元
//
// POST /pushFile
func (s *NeActionController) PushFile(c *gin.Context) {
	language := ctx.AcceptLanguage(c)
	var body struct {
		NeType     string `json:"neType" binding:"required"`
		NeID       string `json:"neId" binding:"required"`
		UploadPath string `json:"uploadPath" binding:"required"`
		DelTemp    bool   `json:"delTemp"` // 删除本地临时文件
	}
	if err := c.ShouldBindBodyWith(&body, binding.JSON); err != nil {
		c.JSON(400, result.CodeMsg(400, i18n.TKey(language, "app.common.err400")))
		return
	}

	// 查询网元获取IP
	neInfo := s.neInfoService.SelectNeInfoByNeTypeAndNeID(body.NeType, body.NeID)
	if neInfo.NeId != body.NeID || neInfo.IP == "" {
		c.JSON(200, result.ErrMsg(i18n.TKey(language, "app.common.noNEInfo")))
		return
	}

	// 网元主机的SSH客户端
	sshClient, err := s.neInfoService.NeRunSSHClient(neInfo.NeType, neInfo.NeId)
	if err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}
	defer sshClient.Close()
	// 网元主机的SSH客户端进行文件传输
	sftpClient, err := sshClient.NewClientSFTP()
	if err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}
	defer sftpClient.Close()

	// 本地文件
	localFilePath := file.ParseUploadFilePath(body.UploadPath)
	// 网元端临时目录
	sshClient.RunCMD("mkdir -p /tmp/omc/push && sudo chmod 777 -R /tmp/omc")
	neFilePath := filepath.ToSlash(filepath.Join("/tmp/omc/push", filepath.Base(localFilePath)))
	// 复制到远程
	if err = sftpClient.CopyFileLocalToRemote(localFilePath, neFilePath); err != nil {
		c.JSON(200, result.ErrMsg("Please check if the file exists or if scp is allowed to copy remotely"))
		return
	}

	defer func() {
		if body.DelTemp {
			_ = os.Remove(localFilePath)
		}
	}()
	c.JSON(200, result.OkData(filepath.ToSlash(neFilePath)))
}

// 获取文件从网元到本地
//
// GET /pullFile
func (s *NeActionController) PullFile(c *gin.Context) {
	language := ctx.AcceptLanguage(c)
	var querys struct {
		NeType   string `form:"neType" binding:"required"`
		NeID     string `form:"neId" binding:"required"`
		Path     string `form:"path" binding:"required"`
		FileName string `form:"fileName" binding:"required"`
		DelTemp  bool   `form:"delTemp"` // 删除本地临时文件
	}
	if err := c.ShouldBindQuery(&querys); err != nil {
		c.JSON(400, result.CodeMsg(400, i18n.TKey(language, "app.common.err400")))
		return
	}

	// 查询网元获取IP
	neInfo := s.neInfoService.SelectNeInfoByNeTypeAndNeID(querys.NeType, querys.NeID)
	if neInfo.NeId != querys.NeID || neInfo.IP == "" {
		c.JSON(200, result.ErrMsg(i18n.TKey(language, "app.common.noNEInfo")))
		return
	}

	// 网元主机的SSH客户端
	sshClient, err := s.neInfoService.NeRunSSHClient(neInfo.NeType, neInfo.NeId)
	if err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}
	defer sshClient.Close()
	// 网元主机的SSH客户端进行文件传输
	sftpClient, err := sshClient.NewClientSFTP()
	if err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}
	defer sftpClient.Close()

	nePath := filepath.ToSlash(filepath.Join(querys.Path, querys.FileName))
	fileName := generate.Code(6) + "_" + querys.FileName
	localFilePath := filepath.Join("/tmp/omc/pull", fileName)
	if runtime.GOOS == "windows" {
		localFilePath = fmt.Sprintf("C:%s", localFilePath)
	}
	// 复制到本地
	if err = sftpClient.CopyFileRemoteToLocal(nePath, localFilePath); err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}

	defer func() {
		if querys.DelTemp {
			_ = os.Remove(localFilePath)
		}
	}()
	c.FileAttachment(localFilePath, fileName)
}

// 网元端文件列表
//
// GET /files
func (s *NeActionController) Files(c *gin.Context) {
	language := ctx.AcceptLanguage(c)
	var querys struct {
		NeType   string `form:"neType" binding:"required"`
		NeID     string `form:"neId" binding:"required"`
		Path     string `form:"path"  binding:"required"`
		PageNum  int64  `form:"pageNum"  binding:"required"`
		PageSize int64  `form:"pageSize"  binding:"required"`
		Search   string `form:"search"`
	}
	if err := c.ShouldBindQuery(&querys); err != nil {
		c.JSON(400, result.CodeMsg(400, i18n.TKey(language, "app.common.err400")))
		return
	}

	// 查询网元获取IP
	neInfo := s.neInfoService.SelectNeInfoByNeTypeAndNeID(querys.NeType, querys.NeID)
	if neInfo.NeId != querys.NeID || neInfo.IP == "" {
		c.JSON(200, result.ErrMsg(i18n.TKey(language, "app.common.noNEInfo")))
		return
	}

	// 网元主机的SSH客户端
	sshClient, err := s.neInfoService.NeRunSSHClient(neInfo.NeType, neInfo.NeId)
	if err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}
	defer sshClient.Close()

	// 获取文件列表
	rows, err := ssh.FileList(sshClient, querys.Path, querys.Search)
	if err != nil {
		c.JSON(200, result.Ok(map[string]any{
			"path":  querys.Path,
			"total": len(rows),
			"rows":  []ssh.FileListRow{},
		}))
		return
	}

	// 对数组进行切片分页
	lenNum := int64(len(rows))
	start := (querys.PageNum - 1) * querys.PageSize
	end := start + querys.PageSize
	var splitRows []ssh.FileListRow
	if start >= lenNum {
		splitRows = []ssh.FileListRow{}
	} else if end >= lenNum {
		splitRows = rows[start:]
	} else {
		splitRows = rows[start:end]
	}

	c.JSON(200, result.Ok(map[string]any{
		"path":  querys.Path,
		"total": lenNum,
		"rows":  splitRows,
	}))
}

// 网元服务操作
//
// PUT /service
func (s *NeActionController) Service(c *gin.Context) {
	language := ctx.AcceptLanguage(c)
	var body struct {
		NeType string `json:"neType" binding:"required"`
		NeID   string `json:"neId" binding:"required"`
		Action string `json:"action" binding:"required,oneof=start restart stop reboot poweroff"` // 操作行为
	}
	if err := c.ShouldBindBodyWith(&body, binding.JSON); err != nil {
		c.JSON(400, result.CodeMsg(400, i18n.TKey(language, "app.common.err400")))
		return
	}

	// 查询网元获取IP
	neInfo := s.neInfoService.SelectNeInfoByNeTypeAndNeID(body.NeType, body.NeID)
	if neInfo.NeId != body.NeID || neInfo.IP == "" {
		c.JSON(200, result.ErrMsg(i18n.TKey(language, "app.common.noNEInfo")))
		return
	}

	neTypeLower := strings.ToLower(neInfo.NeType)
	cmdStr := fmt.Sprintf("sudo service %s %s", neTypeLower, body.Action)
	if neTypeLower == "omc" {
		cmdStr = fmt.Sprintf("nohup sh -c \"sudo systemctl stop restagent && sleep 5s && sudo systemctl %s restagent\" > /dev/null 2>&1 &", body.Action)
	} else if neTypeLower == "ims" {
		if body.Action == "restart" {
			cmdStr = "ims-stop || true && ims-start"
		} else {
			cmdStr = fmt.Sprintf("sudo ims-%s", body.Action)
		}
	}

	if body.Action == "reboot" {
		cmdStr = "sudo shutdown -r now"
	}
	if body.Action == "poweroff" {
		cmdStr = "sudo shutdown -h now"
	}

	_, err := s.neInfoService.NeRunSSHCmd(body.NeType, body.NeID, cmdStr)
	if err != nil {
		c.JSON(200, result.ErrMsg(err.Error()))
		return
	}
	c.JSON(200, result.Ok(nil))
}