package components

import "golang.org/x/crypto/bcrypt"

type PasswordStr string
type PasswordByte []byte

var NilPassStr = StrToPassword("")
var NilPassByte = ByteToPassword([]byte(""))

//GeneratePassword 给密码就行加密操作
func Password(userPassword string, cost ...int) (PasswordByte, bool) {
		var (
				err    error
				encode []byte
		)
		if len(cost) == 0 {
				cost = append(cost, bcrypt.DefaultCost)
		}
		if encode, err = bcrypt.GenerateFromPassword([]byte(userPassword), cost[0]); err != nil {
				return NilPassByte, false
		}
		return ByteToPassword(encode), true
}

// 密码比对
func EqualPassword(userPassword string, hashed string) bool {
		var err error
		if err = bcrypt.CompareHashAndPassword([]byte(hashed), []byte(userPassword)); err != nil {
				return false
		}
		return true
}

func StrToPassword(str string) PasswordStr {
		return PasswordStr(str)
}

func ByteToPassword(by []byte) PasswordByte {
		return PasswordByte(by)
}

func (b PasswordByte) New(pass []byte, cost ...int) (PasswordByte, bool) {
		return Password(string(pass), cost...)
}

func (b PasswordByte) ToString() string {
		return string(b)
}

func (b PasswordByte) ToPasswordStr() PasswordStr {
		return StrToPassword(b.ToString())
}

func (b PasswordByte) Equals(stPass string) bool {
		return EqualPassword(b.ToString(), stPass)
}

func (b PasswordByte) Equal(stPass PasswordByte) bool {
		return EqualPassword(b.ToString(), stPass.ToString())
}

func (str PasswordStr) ToString() string {
		return string(str)
}

func (str PasswordStr) Equals(stPass string) bool {
		return EqualPassword(str.ToString(), stPass)
}

func (str PasswordStr) Equal(stPass PasswordStr) bool {
		return EqualPassword(str.ToString(), stPass.ToString())
}

func (str PasswordStr) New(pass string, cost ...int) (PasswordStr, bool) {
		if p, ok := Password(pass, cost...); ok {
				return p.ToPasswordStr(), ok
		}
		return NilPassStr, false
}

func (str PasswordStr) ToByte() []byte {
		return []byte(str.ToString())
}

func (str PasswordStr) ToPasswordByte() PasswordByte {
		return ByteToPassword(str.ToByte())
}