package mokuai

import (
	"bytes"
	"crypto/md5"
	"encoding/hex"
	"golang.org/x/text/encoding/simplifiedchinese"
	"golang.org/x/text/transform"
	"io/ioutil"
)

func Code_GetMd5(str string) string {
	h := md5.New()
	h.Write([]byte(str))
	return hex.EncodeToString(h.Sum(nil))
}

func Code_GbkToUtf8(s string) (rs string) {
	reader := transform.NewReader(bytes.NewReader([]byte(s)), simplifiedchinese.GBK.NewDecoder())
	d, e := ioutil.ReadAll(reader)
	if e != nil {
		return ""
	}
	return string(d)
}

func Code_GbkToUtf8_byte(s []byte) ([]byte, error) {
	reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder())
	d, e := ioutil.ReadAll(reader)
	if e != nil {
		return nil, e
	}
	return d, nil
}

// Utf8 转 GBK （文本）
func Code_Utf8ToGbk(s string) string {
	reader := transform.NewReader(bytes.NewReader([]byte(s)), simplifiedchinese.GBK.NewEncoder())
	d, e := ioutil.ReadAll(reader)
	if e != nil {
		return ""
	}
	return string(d)
}

// Utf8 转 GBK （byte）
func Code_Utf8ToGbk_byte(s []byte) ([]byte, error) {
	reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewEncoder())
	d, e := ioutil.ReadAll(reader)
	if e != nil {
		return nil, e
	}
	return d, nil
}