const version = 19

/*

This migration sets transactions as failed
whos nonce is too high

*/

const clone = require('clone')

module.exports = {
  version,

  migrate: function (originalVersionedData) {
    const versionedData = clone(originalVersionedData)
    versionedData.meta.version = version
    try {
      const state = versionedData.data
      const newState = transformState(state)
      versionedData.data = newState
    } catch (err) {
      console.warn(`MetaMask Migration #${version}` + err.stack)
    }
    return Promise.resolve(versionedData)
  },
}

function transformState (state) {
  const newState = state
  const { TransactionController } = newState
  if (TransactionController && TransactionController.transactions) {

    const transactions = newState.TransactionController.transactions

    newState.TransactionController.transactions = transactions.map((txMeta, _, txList) => {
      if (txMeta.status !== 'submitted') {
        return txMeta
      }

      const confirmedTxs = txList.filter((tx) => tx.status === 'confirmed')
        .filter((tx) => tx.txParams.from === txMeta.txParams.from)
        .filter((tx) => tx.metamaskNetworkId.from === txMeta.metamaskNetworkId.from)
      const highestConfirmedNonce = getHighestNonce(confirmedTxs)

      const pendingTxs = txList.filter((tx) => tx.status === 'submitted')
        .filter((tx) => tx.txParams.from === txMeta.txParams.from)
        .filter((tx) => tx.metamaskNetworkId.from === txMeta.metamaskNetworkId.from)
      const highestContinuousNonce = getHighestContinuousFrom(pendingTxs, highestConfirmedNonce)

      const maxNonce = Math.max(highestContinuousNonce, highestConfirmedNonce)

      if (parseInt(txMeta.txParams.nonce, 16) > maxNonce + 1) {
        txMeta.status = 'failed'
        txMeta.err = {
          message: 'nonce too high',
          note: 'migration 019 custom error',
        }
      }
      return txMeta
    })
  }
  return newState
}

function getHighestContinuousFrom (txList, startPoint) {
  const nonces = txList.map((txMeta) => {
    const nonce = txMeta.txParams.nonce
    return parseInt(nonce, 16)
  })

  let highest = startPoint
  while (nonces.includes(highest)) {
    highest++
  }

  return highest
}

function getHighestNonce (txList) {
  const nonces = txList.map((txMeta) => {
    const nonce = txMeta.txParams.nonce
    return parseInt(nonce || '0x0', 16)
  })
  const highestNonce = Math.max.apply(null, nonces)
  return highestNonce
}