require('dotenv').config()
const Web3 = require('web3')
const { toBN } = require('web3').utils
const logger = require('./logger')('getShortEventStats.js')
const { getBridgeABIs, BRIDGE_MODES, ERC_TYPES } = require('./utils/bridgeMode')

const { HOME_RPC_URL, FOREIGN_RPC_URL, HOME_BRIDGE_ADDRESS, FOREIGN_BRIDGE_ADDRESS } = process.env
const HOME_DEPLOYMENT_BLOCK = toBN(Number(process.env.HOME_DEPLOYMENT_BLOCK) || 0)
const FOREIGN_DEPLOYMENT_BLOCK = toBN(Number(process.env.FOREIGN_DEPLOYMENT_BLOCK) || 0)

const homeProvider = new Web3.providers.HttpProvider(HOME_RPC_URL)
const web3Home = new Web3(homeProvider)

const foreignProvider = new Web3.providers.HttpProvider(FOREIGN_RPC_URL)
const web3Foreign = new Web3(foreignProvider)

const ERC20_ABI = require('../contracts/build/contracts/ERC20').abi
const { getTokenType } = require('./utils/ercUtils')
const { getPastEvents, getBlockNumber } = require('./utils/contract')

async function main(bridgeMode) {
  const { HOME_ABI, FOREIGN_ABI } = getBridgeABIs(bridgeMode)
  const homeBridge = new web3Home.eth.Contract(HOME_ABI, HOME_BRIDGE_ADDRESS)
  const foreignBridge = new web3Foreign.eth.Contract(FOREIGN_ABI, FOREIGN_BRIDGE_ADDRESS)
  const erc20MethodName = bridgeMode === BRIDGE_MODES.NATIVE_TO_ERC ? 'erc677token' : 'erc20token'
  const erc20Address = await foreignBridge.methods[erc20MethodName]().call()
  const erc20Contract = new web3Foreign.eth.Contract(ERC20_ABI, erc20Address)
  const tokenType = await getTokenType(foreignBridge, FOREIGN_BRIDGE_ADDRESS)

  logger.debug('getting last block numbers')
  const [homeBlockNumber, foreignBlockNumber] = await getBlockNumber(web3Home, web3Foreign)
  logger.debug("calling homeBridge.getPastEvents('UserRequestForSignature')")
  const homeDeposits = await getPastEvents({
    contract: homeBridge,
    event: 'UserRequestForSignature',
    fromBlock: HOME_DEPLOYMENT_BLOCK,
    toBlock: homeBlockNumber,
    options: {}
  })

  logger.debug("calling foreignBridge.getPastEvents('RelayedMessage')")
  const foreignDeposits = await getPastEvents({
    contract: foreignBridge,
    event: 'RelayedMessage',
    fromBlock: FOREIGN_DEPLOYMENT_BLOCK,
    toBlock: foreignBlockNumber,
    options: {}
  })

  logger.debug("calling homeBridge.getPastEvents('AffirmationCompleted')")
  const homeWithdrawals = await getPastEvents({
    contract: homeBridge,
    event: 'AffirmationCompleted',
    fromBlock: HOME_DEPLOYMENT_BLOCK,
    toBlock: homeBlockNumber,
    options: {}
  })

  logger.debug("calling foreignBridge.getPastEvents('UserRequestForAffirmation')")
  const foreignWithdrawals =
    tokenType === ERC_TYPES.ERC20
      ? await getPastEvents({
          contract: erc20Contract,
          event: 'Transfer',
          fromBlock: FOREIGN_DEPLOYMENT_BLOCK,
          toBlock: foreignBlockNumber,
          options: {
            filter: { to: FOREIGN_BRIDGE_ADDRESS }
          }
        })
      : await getPastEvents({
          contract: foreignBridge,
          event: 'UserRequestForAffirmation',
          fromBlock: FOREIGN_DEPLOYMENT_BLOCK,
          toBlock: foreignBlockNumber,
          options: {}
        })
  logger.debug('Done')
  return {
    depositsDiff: homeDeposits.length - foreignDeposits.length,
    withdrawalDiff: homeWithdrawals.length - foreignWithdrawals.length,
    home: {
      deposits: homeDeposits.length,
      withdrawals: homeWithdrawals.length
    },
    foreign: {
      deposits: foreignDeposits.length,
      withdrawals: foreignWithdrawals.length
    }
  }
}
module.exports = main