package aes

import (
	"encoding/hex"
	"fmt"
	"os"
	"path/filepath"

	"b612.me/starcrypto"

	"b612.me/starlog"
	"b612.me/staros"
	"github.com/spf13/cobra"
)

var Cmd = &cobra.Command{
	Use:   "aes-cfb",
	Short: "使用aes-cfb处理文件或字符串",
	Long:  "使用aes-cfb处理文件或字符串",
	Run: func(this *cobra.Command, args []string) {
		var err error
		ok, _ := this.Flags().GetBool("file")
		de, _ := this.Flags().GetBool("decode")
		key, _ := this.Flags().GetString("key")
		keyfile, _ := this.Flags().GetString("keyfile")
		if len(key) == 0 && len(keyfile) == 0 {
			starlog.Errorln("请指定指定Key或KeyFile")
			os.Exit(1)
		}
		if len(key) != 0 && len(keyfile) != 0 {
			starlog.Errorln("不能同时指定Key与KeyFile")
			os.Exit(1)
		}
		if len(args) != 1 {
			starlog.Criticalln("参数不足，请输入文件地址或字符串")
			this.Help()
			os.Exit(2)
		}
		var byteKey []byte
		if len(key) != 0 {
			byteKey = []byte(key)
		} else {
			if !staros.Exists(keyfile) {
				starlog.Errorln("keyfile不存在：", keyfile)
				os.Exit(3)
			}
			fmt.Println("读取Key文件中……")
			tmpstr, err := starcrypto.FileSum(keyfile, "sha256", func(ok float64) { fmt.Printf("完成读取%.2f\r", ok) })
			if err != nil {
				starlog.Errorln("keyfile读取失败：", err)
				os.Exit(4)
			}
			fmt.Println()
			byteKey, _ = hex.DecodeString(tmpstr)
		}
		if ok {
			path, _ := this.Flags().GetString("out")
			if path == "" {
				ext := filepath.Ext(args[0])
				if ext != "" {
					path = args[0][:len(args[0])-len(ext)] + ".aescfb" + ext
				} else {
					path = args[0] + ".aescfb"
				}
			}
			if !de {
				err = EncodeFile(args[0], path, byteKey)
			} else {
				err = DecodeFile(args[0], path, byteKey)
			}
		} else {
			if !de {
				data := EncodeStr(args[0], byteKey)
				fmt.Println(data)
			} else {
				data := DecodeStr(args[0], byteKey)
				fmt.Println(string(data))
			}
		}
		if err != nil {
			starlog.Criticalln(err)
			return
		}
	},
}

func init() {
	Cmd.Flags().BoolP("file", "f", false, "aes-cfb处理文件")
	Cmd.Flags().StringP("out", "o", "", "文件加解密输出地址")
	Cmd.Flags().StringP("key", "k", "", "加解密Key字符串")
	Cmd.Flags().StringP("keyfile", "s", "", "加解密Key文件（不能与key字符串同时选择）")
	Cmd.Flags().BoolP("decode", "d", false, "进行aes-cfb解码")
}