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/* eslint-disable func-style */

const BN = require('bn.js');

const types = require('./types');

const {HashPrefix} = require('./hash-prefixes');

const {BinaryParser} = require('./serdes/binary-parser');

const {BinarySerializer, BytesList} = require('./serdes/binary-serializer');

const {bytesToHex, slice, parseBytes} = require('./utils/bytes-utils');

const {sha512Half, transactionID} = require('./hashes');

const makeParser = bytes => new BinaryParser(bytes);

const readJSON = parser => parser.readType(types.STObject).toJSON();

const binaryToJSON = bytes => readJSON(makeParser(bytes));

function serializeObject(object, opts = {}) {

const {prefix, suffix, signingFieldsOnly = false} = opts;

const bytesList = new BytesList();

if (prefix) {

bytesList.put(prefix);

}

const filter = signingFieldsOnly ? f => f.isSigningField : undefined;

types.STObject.from(object).toBytesSink(bytesList, filter);

if (suffix) {

bytesList.put(suffix);

}

return bytesList.toBytes();

}

function signingData(tx, prefix = HashPrefix.transactionSig) {

return serializeObject(tx, {prefix, signingFieldsOnly: true});

}

function signingClaimData(claim) {

const prefix = HashPrefix.paymentChannelClaim

const channel = types.Hash256.from(claim.channel).toBytes()

const amount = new types.UInt64(new BN(claim.amount)).toBytes();

const bytesList = new BytesList();

bytesList.put(prefix)

bytesList.put(channel)

bytesList.put(amount)

return bytesList.toBytes()

}

function multiSigningData(tx, signingAccount) {

const prefix = HashPrefix.transactionMultiSig;

const suffix = types.AccountID.from(signingAccount).toBytes();

return serializeObject(tx, {prefix, suffix, signingFieldsOnly: true});

}

module.exports = {

BinaryParser,

BinarySerializer,

BytesList,

makeParser,

serializeObject,

readJSON,

bytesToHex,

parseBytes,

multiSigningData,

signingData,

signingClaimData,

binaryToJSON,

sha512Half,

transactionID,

slice

};