const { getOutputFromLatestDeploy } = require('./readDeployOutput'); // TODO: import from javascript generated by ../../typescript/src/readDeployOutput.ts

const envError = (network) =>
  `pass --network tag to hardhat task (current network=${network})`;

// list of networks supported by Etherscan
const etherscanNetworks = ['mainnet', 'kovan', 'goerli', 'ropsten', 'rinkeby'];

/*
 * Generate link to Etherscan for an address on the given network
 * */
function etherscanLink(network, address) {
  const prefix = network == 'mainnet' ? '' : `${network}.`;
  return `https://${prefix}etherscan.io/address/${address}`;
}

/*
 * Parse the contract verification inputs
 * that were output by the latest contract deploy
 * for the network that hardhat is configured to
 * and attempt to verify those contracts' source code on Etherscan
 * */
async function verifyLatestDeploy() {
  const network = hre.network.name;

  // assert that network from .env is supported by Etherscan
  if (!etherscanNetworks.includes(network)) {
    throw new Error(`Network not supported by Etherscan; ${envError(network)}`);
  }
  console.log(`VERIFY ${network}`);

  // get the JSON verification inputs for the given network
  // from the latest contract deploy; throw if not found
  const verificationInputs = getOutputFromLatestDeploy(network, 'verification');

  // loop through each verification input for each contract in the file
  for (let verificationInput of verificationInputs) {
    // attempt to verify contract on etherscan
    // (await one-by-one so that Etherscan doesn't rate limit)
    await verifyContract(network, verificationInput);
  }
}

/*
 * Given one contract verification input,
 * attempt to verify the contracts' source code on Etherscan
 * */
async function verifyContract(network, verificationInput) {
  const { name, address, constructorArguments } = verificationInput;
  try {
    console.log(
      `   Attempt to verify ${name}   -  ${etherscanLink(network, address)}`,
    );
    await hre.run('verify:verify', {
      network,
      address,
      constructorArguments,
    });
    console.log(`   SUCCESS verifying ${name}`);
  } catch (e) {
    console.log(`   ERROR verifying ${name}`);
    console.error(e);
  }
  console.log('\n\n'); // add space after each attempt
}

module.exports = {
  verifyLatestDeploy,
};