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

const utils = require('../utils');
const bc = require('../blockchain');
const metamgr = require('../metamgr');

async function authVerifySignature(req, rsp) {
  try {
    const netId = await bc.getNetId();
    const msgParams = JSON.stringify({
      types: {
        EIP712Domain: [
          { name: 'name', type: 'string' },
          { name: 'version', type: 'string' },
          { name: 'chainId', type: 'uint256' },
        ],
        set: [
        ]
      },
      primaryType: 'set',
      domain: {
        name: req.name,
        version: req.version,
        chainId: netId,
      },
      message: {}
    });
    const recovered = sigUtil.recoverTypedSignature(
      {data:
       msgParams,
       signature: req.signature,
       version: 'V4'});
    utils.rspData(
      rsp,
      {
        'recovered': recovered
      });
  } catch (err) {
    utils.rspErr(rsp, 1, err);
  }
}

async function buyBoxVerifySignature(req, rsp) {
  try {
    const netId = await bc.getNetId();
    const msgParams = JSON.stringify({
      types: {
        EIP712Domain: [
          { name: 'name', type: 'string' },
          { name: 'version', type: 'string' },
          { name: 'chainId', type: 'uint256' },
          { name: 'verifyingContract', type: 'address' }
        ],
        set: [
          { name: 'item', type: 'uint256' },
          { name: 'token', type: 'address' },
          { name: 'price', type: 'uint256' },
          { name: 'salt', type: 'uint256' }
        ]
      },
      primaryType: 'set',
      domain: {
        name: req.name,
        version: req.version,
        chainId: netId,
        verifyingContract: metamgr['mallInstance'].address
      },
      message: {
        item: req.type,
        token: req.paymentTokenAddress,
        price: req.price,
        salt: req.nonce
      }
    });
    const recovered = sigUtil.recoverTypedSignature(
      {data:
       msgParams,
       signature: req.signature,
       version: 'V4'});
    utils.rspData(
      rsp,
      {
        'recovered': recovered
      });
  } catch (err) {
    utils.rspErr(rsp, 1, err);
  }
}

function init() {
  utils.registerHandler('BcService', 'authVerifySignature', authVerifySignature);
  utils.registerHandler('BcService', 'buyBoxVerifySignature', buyBoxVerifySignature);
}

exports.init = init;