// Copyright (c) 2015 qianqiusoft.com
// Licensed to You under the GNU Affero GPL v3
// See the LICENSE file at git.qianqiusoft.com/qianqiusoft/light-vocation/LICENSE
// http://www.gnu.org/licenses/why-affero-gpl.en.html

package utils

import (
	"crypto/md5"
	"encoding/base64"
	"encoding/hex"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/config"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/logs"
)

type LoginCheck interface {
	AddPwdErrNum(string) bool
	CheckErrNum(string) bool
}

var globalLoginCheck LoginCheck

func GetGlobalLoginCheck() LoginCheck {
	return globalLoginCheck
}

func SetGlobalLoginCheck(loginCheck LoginCheck) {
	globalLoginCheck = loginCheck
}

func HashPassword(password, salt string) string {
	h := md5.New()
	enableDbSalt := config.AppConfig.GetBool("enable_db_salt", true)
	customSalt := config.AppConfig.GetKey("password_salt")
	enableBase64 := config.AppConfig.GetBool("password_enable_base64", true)

	if !enableDbSalt {
		h.Write([]byte(password))
		if len(customSalt) > 0 {
			//fmt.Println(customSalt)
			md5Str := base64.StdEncoding.EncodeToString(h.Sum(nil))
			h.Reset()
			h.Write([]byte(md5Str + customSalt))
		}
		if enableBase64 {
			base64_str := base64.StdEncoding.EncodeToString(h.Sum(nil))
			logs.Debug("启用编码:", base64_str)
			return base64_str
		} else {
			str := hex.EncodeToString(h.Sum(nil))
			logs.Debug("未启用编码:", str)
			return str
		}
	} else {
		h.Write([]byte(password))
		md5Str := hex.EncodeToString(h.Sum(nil))
		logs.Debug("第一次加密:", md5Str)
		if len(salt) > 0 {
			h.Reset()
			h.Write([]byte(md5Str + salt))
			md5Str = hex.EncodeToString(h.Sum(nil))
		}
		logs.Debug("第二次加密:", md5Str)
		return md5Str
	}
}