package main

import (
	"fmt"
	"io"
	"net/http"
	"os"
	"errors"
	"os/exec"
	"path/filepath"
	"runtime"
	"strings"
	"time"

)

func main(){

	res, err := http.Get("https://kptyun.cn/file/PrconsoleV2.4.exe")
	if err != nil {
		panic(err)
	}

	if res.StatusCode != 200{
		fmt.Println("更新文件不存在或网络错误")
		time.Sleep(3*time.Second)
		return
	}
	fmt.Println("更新中....")
	res.Header.Get("Content-Disposition")
	CurrentPath,err :=  GetCurrentPath()
	if err != nil {
		fmt.Println(err)
		return
	}
	err =os.Rename(CurrentPath+"PrconsoleV2.4.exe",CurrentPath+"PrconsoleV2.4.exe"+time.Now().Format("20060102150405"))
	f, err := os.Create(CurrentPath+"PrconsoleV2.4.exe")
	if err != nil {
		fmt.Println(err)
		return
	}
	_,err =io.Copy(f, res.Body)
	if err!= nil{
		fmt.Println(err)
		return
	}
	fmt.Println("更新成功")
	time.Sleep(3*time.Second)
}

func GetCurrentPath() (string, error) {
	file, err := exec.LookPath(os.Args[0])
	if err != nil {
		return "", err
	}
	path, err := filepath.Abs(file)
	if err != nil {
		return "", err
	}
	//fmt.Println("path111:", path)
	if runtime.GOOS == "windows" {
		path = strings.Replace(path, "\\", "/", -1)
	}
	//fmt.Println("path222:", path)
	i := strings.LastIndex(path, "/")
	if i < 0 {
		return "", errors.New(`Can't find "/" or "\".`)
	}
	//fmt.Println("path333:", path)
	return string(path[0 : i+1]), nil
}