import ERC20Token from 'Embark/contracts/ERC20Token';
import { actions as accountActions } from '../reducers/accounts'
import { isNil } from 'lodash'

const { receiveAccounts, receiveStatusContactCode } = accountActions
const CONTACT_CODE = 'CONTACT_CODE'
const STATUS_API_REQUEST = 'STATUS_API_REQUEST'
const hasContactCode = () => !isNil(STATUS_API) && !isNil(STATUS_API[CONTACT_CODE])
const statusApiSuccess = event => event.data.type === 'STATUS_API_SUCCESS'

export const fetchAndDispatchAccountsWithBalances = (web3, dispatch) => {
  web3.eth.getAccounts((err, addresses) => {
    if (addresses) {
      const defaultAccount = web3.eth.defaultAccount || addresses[0]
      const accounts = addresses.map(async address => {
        const balance = await web3.eth.getBalance(address, 'latest')
        const SNTBalance = await ERC20Token.methods.balanceOf(address).call()
        return { address, balance, SNTBalance }
      })
      Promise.all(accounts).then(accounts => {
        dispatch(receiveAccounts(defaultAccount, accounts))
      })
    }
  })
}

export const checkAndDispatchStatusContactCode = dispatch => {
  window.addEventListener('message', function (event) {
    if (!event.data || !event.data.type) return
    if (statusApiSuccess(event) && hasContactCode()) dispatch(receiveStatusContactCode(STATUS_API[CONTACT_CODE]))
  });

  window.postMessage({ type: STATUS_API_REQUEST, permissions: [CONTACT_CODE] }, '*');
}