package main

import (
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"
	"regexp"
	"runtime"
	"strings"

	"b612.me/starainrt"

	"b612.me/sshd"

	"github.com/spf13/cobra"
)

var sftpcmd = &cobra.Command{
	Use:   "sftp",
	Short: "sftp上传下载",
	Long:  "sftp上传下载",
	Run: func(this *cobra.Command, args []string) {
		d, _ := this.Flags().GetBool("download")
		s, _ := this.Flags().GetString("src")
		r, _ := this.Flags().GetString("dst")
		i, _ := this.Flags().GetString("identify")
		k, _ := this.Flags().GetString("password")
		p, _ := this.Flags().GetInt("port")
		b, _ := this.Flags().GetInt("buffer")
		g, _ := this.Flags().GetString("regexp")
		var user, host string
		var err error
		if len(args) != 1 {
			fmt.Println("sftp <[user@]Host> -s <Local> -d <Remote>")
			this.Help()
			return
		}
		hosts := strings.Split(args[0], "@")
		if len(hosts) == 1 {
			host = hosts[0]
			user = "root"
		} else {
			user = hosts[0]
			host = hosts[1]
		}
		fmt.Println("进行SSH连接……")
		myssh := new(sshd.StarSSH)
		err = myssh.Connect(user, k, host, i, p)
		if err != nil {
			fmt.Println(err)
			return
		}
		defer myssh.Close()
		fmt.Println("已连接上……")
		sftp, err := sshd.CreateSftp(myssh.Client)
		if err != nil {
			fmt.Println(err)
			return
		}
		defer sftp.Close()
		fmt.Println("已建立SFTP……")

		shell := func(pect float64) {
			if pect != 100.0 {
				fmt.Printf("传输已完成：%f%%\r", pect)
			} else {
				fmt.Printf("传输已完成：%f%%\n", pect)
			}
		}
		var UploadDir func(string, string)
		UploadDir = func(fs, remote string) {
			if runtime.GOOS == "windows" {
				fs = strings.Replace(fs, "/", "\\", -1)
			}
			sftp.MkdirAll(remote)
			abspath, _ := filepath.Abs(fs)
			dir, err := ioutil.ReadDir(fs)
			if err != nil {
				fmt.Println(err)
				return
			}
			for _, v := range dir {
				if v.IsDir() {
					if g != "" {
						continue
					}
					UploadDir(abspath+string(os.PathSeparator)+v.Name(), remote+"/"+v.Name())
				} else {
					if ok, _ := regexp.MatchString(g, v.Name()); !ok {
						continue
					}
					fmt.Println("上传:" + abspath + string(os.PathSeparator) + v.Name())
					err = sshd.FtpTransferOutFunc(abspath+string(os.PathSeparator)+v.Name(), remote+"/"+v.Name(), b, shell, sftp)
					if err != nil {
						fmt.Println(err)
						continue
					}
				}
			}
		}

		var DownloadDir func(string, string)
		DownloadDir = func(fs, remote string) {
			abspath, _ := filepath.Abs(remote)
			os.MkdirAll(abspath, 0755)
			dir, err := sftp.ReadDir(fs)
			if err != nil {
				fmt.Println("读取错误", err)
				return
			}
			for _, v := range dir {
				if v.IsDir() {
					if g != "" {
						continue
					}
					DownloadDir(fs+"/"+v.Name(), abspath+string(os.PathSeparator)+v.Name())
				} else {
					if ok, _ := regexp.MatchString(g, v.Name()); !ok {
						continue
					}
					fmt.Println("下载:" + fs + "/" + v.Name())
					err = sshd.FtpTransferInFunc(fs+"/"+v.Name(), abspath+string(os.PathSeparator)+v.Name(), b, shell, sftp)
					if err != nil {
						fmt.Println(err)
						continue
					}
				}
			}
		}
		if !d {
			if !starainrt.Exists(s) {
				fmt.Println("本地文件或文件夹：" + s + "不存在")
				return
			}
			if starainrt.IsFile(s) {
				err = sshd.FtpTransferOutFunc(s, r, b, shell, sftp)
			} else {
				UploadDir(s, r)
			}
		} else {
			if !myssh.Exists(s) {
				fmt.Println("远端文件或文件夹：" + s + "不存在")
				return
			}
			stat, err := sftp.Stat(s)
			if err != nil {
				fmt.Println("错误:", err)
				return
			}
			if !stat.IsDir() {
				err = sshd.FtpTransferInFunc(s, r, b, shell, sftp)
			} else {
				DownloadDir(s, r)
			}
		}
		if err != nil {
			fmt.Println(err)
		}
	},
}

func init() {
	sftpcmd.Flags().BoolP("download", "D", false, "进行下载")
	sftpcmd.Flags().StringP("identify", "i", "", "RSA登录密钥")
	sftpcmd.Flags().StringP("password", "k", "", "登录密码")
	sftpcmd.Flags().StringP("src", "s", "", "本机路径/若为下载则相反")
	sftpcmd.Flags().StringP("dst", "d", "", "远程路径/若为下载则相反")
	sftpcmd.Flags().IntP("port", "p", 22, "登录端口")
	sftpcmd.Flags().StringP("regexp", "r", "", "正则表达式")
	sftpcmd.Flags().IntP("buffer", "b", 10240, "buffer大小")
}