// ------------------------------------------------------------------------
//   Project atila
//   Active Thing (activething.com) git.activething.com/go
//
//   File name  main.go
//   Created by DEV
//   Modified   16/01/2024
//
//   Copyright 2024 activething.com
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------

package main

import (
	"activething.com/go/gogo/core/bins/bfields"
	"activething.com/go/gogo/core/results"
	"activething.com/go/gogo/packs/pjson"
	"crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"fmt"
	"io"
)

type A struct {
	CampoInt int	 	`pack:"campo,q,e"`
	Cadena string		`json:"cadena,e,b64"`
	Seguro string 		`pack:"seguro,e"`
	Arrays []byte		`pack:"arr,b64"`
}


type encrypter struct {
	key []byte
}



func (e encrypter) Encrypt (data []byte) results.Bytes {
	b,er := aes.NewCipher(e.key)
	ct := make([]byte,aes.BlockSize+len(data))
	iv := ct[:aes.BlockSize]
	if _, er = io.ReadFull(rand.Reader, iv); er != nil {
		return results.DoBytesError(fmt.Errorf("could not encrypt: %v", er))
	}
	st := cipher.NewCFBEncrypter(b,iv)
	st.XORKeyStream(ct[aes.BlockSize:],data)
	return results.DoBytesSuccess(ct)
}

func (e encrypter) Decrypt (data string) (string,error) {
	ct := []byte(data)

	block, err := aes.NewCipher(e.key)
	if err != nil {
		return "", fmt.Errorf("could not create new cipher: %v", err)
	}

	if len(ct) < aes.BlockSize {
		return "", fmt.Errorf("invalid ciphertext block size")
	}

	iv := ct[:aes.BlockSize]
	ct = ct[aes.BlockSize:]

	stream := cipher.NewCFBDecrypter(block, iv)
	stream.XORKeyStream(ct, ct)

	return string(ct), nil
}


func main() {

	en := encrypter{key: []byte{0,1,2,3,45,6,6,7,8,9,0,1,1,1,1,1}}

	pk := pjson.NewPacker(pjson.WithEncrypter(en))
	//pk := pjson.NewPacker()

	t := A {
		CampoInt: 23,
		Cadena: "Esto es una cadena",
		Seguro: "Esto debe de ir encruptdao",
		Arrays: []byte{233,222,221},
	}


	/*
	pk.PackList(func(p packs.PackListBuilder, flags packs.Flags){
		p.ItemUInt64(0,flags)
		p.ItemFloat64(7.8,flags)
		p.ItemList(func (p1 packs.PackListBuilder, f packs.Flags){
			p1.ItemString("MICasa",flags)
			p1.ItemString("Coche",flags)
		},flags)
		p.ItemObject(func (b packs.PackObjectBuilder, f packs.Flags) {
			b.FieldString("field1","Esto es un campo",f)
			b.FieldDate("field2",time.Now(),f)
		},flags)
		p.ItemMap(func (b packs.PackMapBuilder,f packs.Flags){
			b.KeyValueString(2,"Una cosita",0)
			b.KeyValueInt64(3.4,5,0)
		},flags)
	},0)

	errs.Test(pk.ErrorResult(),true)
	fmt.Printf("Paquete %s\n",pk.Packet())

	*/





	pk.PackAny(t,0)
	//errs.Test(pk.Cause(),true)
	fmt.Printf("Paquete %s\n",pk.Packet())


	res := en.Encrypt([]byte("Esto debe de ir encruptdao"))
	if res.IsError() {
		panic(res.Cause())
	}
	dt := string(res.Success())
	fmt.Printf("seguro %s\n",dt)

	st,er := en.Decrypt(dt)
	if  er != nil {
		panic(er)
	}
	fmt.Printf("decrupt %s\n",st)



	f,_ := bfields.NewBField([]byte("MiNombre"),[]byte("221100"))
	fmt.Printf("field :%s\n",f.String())

}