const ethUtil = require('ethereumjs-util');
const sigUtil = require('@metamask/eth-sig-util');

const app = require('j7/app');
const utils = require('j7/utils');
const bcutils = require('j7/bcutils');
const bc = require('../blockchain');
const metaFactory = require('../metadata/factory');

async function isValidItem(session) {
  const itemId = session.request('item_id');
  const itemMeta = metaFactory.getMetaByKey('Item', itemId);
  if (!itemMeta) {
    session.rspErr(1, 'is not nft');
    return;
  }
  if (itemMeta.getNftType() == bcutils.NONE_TYPE) {
    session.rspErr(1, 'is not nft');
    return;
  }
  session.rspOk();
}

async function isValidAccount(session) {
  const account = session.request('account');
  const valid = bc.isAddress(account);
  if (!valid) {
    session.rspErr(1, 'is invalid account');
    return;
  }
  session.rspOk();
}

async function presentItem(session) {
  const {err, conn} = await app.getDbConn('MarketDb0');
  if (err) {
    session.rspErr(1, 'is invalid account');
    return;
  }
  const account = bcutils.toNormalAddress(session.request('account'));
  const itemId = session.request('item_id');
  const itemMeta = metaFactory.getMetaByKey('Item', itemId);
  if (!itemMeta) {
    session.rspErr(1, 'is not nft');
    return;
  }
  if (itemMeta.getNftType() == bcutils.NONE_TYPE) {
    session.rspErr(1, 'is not nft');
    return;
  }
  const valid = bc.isAddress(account);
  if (!valid) {
    session.rspErr(2, 'is invalid account');
    return;
  }
  session.rspOk();
}

function init() {
  app.registerHandler('BcService', 'isValidAccount', isValidAccount);
  app.registerHandler('BcService', 'isValidItem', isValidItem);
  app.registerHandler('BcService', 'presentItem', presentItem);
}

exports.init = init;