require('dotenv').config()
const logger = require('./logger')('eventsStats')
const eventsInfo = require('./utils/events')

function compareDepositsHome(foreign) {
  return homeDeposit => {
    return (
      foreign.filter(foreignDeposit => {
        return (
          foreignDeposit.returnValues.transactionHash === homeDeposit.transactionHash &&
          foreignDeposit.returnValues.recipient === homeDeposit.returnValues.recipient &&
          foreignDeposit.returnValues.value === homeDeposit.returnValues.value
        )
      }).length === 0
    )
  }
}
function compareDepositsForeign(home) {
  return foreignDeposit => {
    return (
      home.filter(homeDeposit => {
        return (
          homeDeposit.transactionHash === foreignDeposit.returnValues.transactionHash &&
          homeDeposit.returnValues.recipient === foreignDeposit.returnValues.recipient &&
          homeDeposit.returnValues.value === foreignDeposit.returnValues.value
        )
      }).length === 0
    )
  }
}

function compareTransferHome(foreign) {
  return homeDeposit => {
    return (
      foreign.filter(foreignDeposit => {
        return (
          homeDeposit.returnValues.transactionHash === foreignDeposit.transactionHash &&
          homeDeposit.returnValues.recipient === foreignDeposit.returnValues.from &&
          homeDeposit.returnValues.value === foreignDeposit.returnValues.value
        )
      }).length === 0
    )
  }
}
function compareTransferForeign(home) {
  return foreignDeposit => {
    return (
      home.filter(homeDeposit => {
        return (
          foreignDeposit.transactionHash === homeDeposit.returnValues.transactionHash &&
          foreignDeposit.returnValues.from === homeDeposit.returnValues.recipient &&
          foreignDeposit.returnValues.value === homeDeposit.returnValues.value
        )
      }).length === 0
    )
  }
}

async function main() {
  try {
    const {
      foreignDeposits,
      homeDeposits,
      homeWithdrawals,
      foreignWithdrawals,
      isExternalErc20
    } = await eventsInfo()

    const onlyInHomeDeposits = homeDeposits.filter(compareDepositsHome(foreignDeposits))
    const onlyInForeignDeposits = foreignDeposits
      .concat([])
      .filter(compareDepositsForeign(homeDeposits))

    const onlyInHomeWithdrawals = isExternalErc20
      ? homeWithdrawals.filter(compareTransferHome(foreignWithdrawals))
      : homeWithdrawals.filter(compareDepositsForeign(foreignWithdrawals))
    const onlyInForeignWithdrawals = isExternalErc20
      ? foreignWithdrawals.filter(compareTransferForeign(homeWithdrawals))
      : foreignWithdrawals.filter(compareDepositsHome(homeWithdrawals))

    logger.debug('Done')
    return {
      onlyInHomeDeposits,
      onlyInForeignDeposits,
      onlyInHomeWithdrawals,
      onlyInForeignWithdrawals,
      lastChecked: Math.floor(Date.now() / 1000)
    }
  } catch (e) {
    logger.error(e)
    throw e
  }
}

module.exports = main