// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package lib

import (
	"bytes"
	"encoding/hex"
	"fmt"

	"v.io/v23/vom"
)

func HexVomEncode(v interface{}, te *vom.TypeEncoder) (string, error) {
	var buf bytes.Buffer
	var encoder *vom.Encoder
	if te != nil {
		encoder = vom.NewEncoderWithTypeEncoder(&buf, te)
	} else {

		encoder = vom.NewEncoder(&buf)
	}
	if err := encoder.Encode(v); err != nil {
		return "", err
	}
	return hex.EncodeToString(buf.Bytes()), nil
}

func HexVomEncodeOrDie(v interface{}, te *vom.TypeEncoder) string {
	s, err := HexVomEncode(v, te)
	if err != nil {
		panic(err)
	}
	return s
}

func HexVomDecode(data string, v interface{}, td *vom.TypeDecoder) error {
	binbytes, err := hex.DecodeString(data)
	if err != nil {
		return fmt.Errorf("Error decoding hex string %q: %v", data, err)
	}
	var decoder *vom.Decoder
	if td != nil {
		decoder = vom.NewDecoderWithTypeDecoder(bytes.NewReader(binbytes), td)
	} else {
		decoder = vom.NewDecoder(bytes.NewReader(binbytes))
	}
	return decoder.Decode(v)
}