import Web3 from 'web3';
import { toHex } from 'web3-utils';
import { FakeSignableTx, FakeSignResult } from './txn';

export function MetamaskWallet(address) {
  this.address = address;
}

// Cheat a bit and pretend to sign transaction
// Sign it actually when sending
export const metamaskSignTransaction = async (
  txn: FakeSignableTx,
  from: string
) => {
  txn.from = from;
  return FakeSignResult(txn, metamaskSendTransaction);
};

const metamaskSendTransaction = async (txn: FakeSignableTx, web3: Web3) => {
  const metamaskFormattedTxn = {
    data: txn.data,
    gasLimit: txn.gasLimit,
    gasPrice: txn.gasPrice,
    nonce: txn.nonce,
    to: toHex(txn.to),
    from: toHex(txn.from),
  };

  let txHash;
  if (window.ethereum) {
    //NOTE  see also #596, #630, #646
    //      no idea what's going on, we should figure it out,
    //      but we apply this bandaid to hopefully stop the bleeding.
    //      at least it also helps with the NOTE of the other branch.
    txHash = await window.ethereum.request({
      method: 'eth_sendTransaction',
      params: [metamaskFormattedTxn],
      from: txn.from,
    });
  } else {
    //NOTE  since this gives us a receipt instead of just the hash of the
    //      signed tx, it makes us wait for confirmation outside of our own
    //      waitForTransactionConfirm. because of this the progress bar loses
    //      its progressiveness for metamask users.
    let receipt = await await web3.eth.sendTransaction(metamaskFormattedTxn);
    txHash = receipt.transactionHash;
  }
  return txHash;
};