import React, { Component } from 'react'
import { inherits } from 'util'
import { connect } from 'react-redux'
import { withRouter } from 'react-router-dom'
import { compose } from 'recompose'
import * as actions from '../../store/actions'
import txHelper from '../../../lib/tx-helper'
import log from 'loglevel'
import R from 'ramda'
import SignatureRequest from '../../components/app/signature-request'
import SignatureRequestOriginal from '../../components/app/signature-request-original'
import Loading from '../../components/ui/loading-screen'
import { DEFAULT_ROUTE } from '../../helpers/constants/routes'

export default compose(
  withRouter,
  connect(mapStateToProps)
)(ConfirmTxScreen)

function mapStateToProps (state) {
  const { metamask } = state
  const {
    unapprovedMsgCount,
    unapprovedPersonalMsgCount,
    unapprovedTypedMessagesCount,
  } = metamask

  return {
    identities: state.metamask.identities,
    unapprovedTxs: state.metamask.unapprovedTxs,
    unapprovedMsgs: state.metamask.unapprovedMsgs,
    unapprovedPersonalMsgs: state.metamask.unapprovedPersonalMsgs,
    unapprovedTypedMessages: state.metamask.unapprovedTypedMessages,
    index: state.appState.currentView.context,
    warning: state.appState.warning,
    network: state.metamask.network,
    provider: state.metamask.provider,
    currentCurrency: state.metamask.currentCurrency,
    blockGasLimit: state.metamask.currentBlockGasLimit,
    unapprovedMsgCount,
    unapprovedPersonalMsgCount,
    unapprovedTypedMessagesCount,
    send: state.metamask.send,
    selectedAddressTxList: state.metamask.selectedAddressTxList,
  }
}

inherits(ConfirmTxScreen, Component)
function ConfirmTxScreen () {
  Component.call(this)
}

ConfirmTxScreen.prototype.getUnapprovedMessagesTotal = function () {
  const {
    unapprovedMsgCount = 0,
    unapprovedPersonalMsgCount = 0,
    unapprovedTypedMessagesCount = 0,
  } = this.props

  return unapprovedTypedMessagesCount + unapprovedMsgCount + unapprovedPersonalMsgCount
}

ConfirmTxScreen.prototype.componentDidMount = function () {
  const {
    unapprovedTxs = {},
    network,
    send,
  } = this.props
  const unconfTxList = txHelper(unapprovedTxs, {}, {}, {}, network)

  if (unconfTxList.length === 0 && !send.to && this.getUnapprovedMessagesTotal() === 0) {
    this.props.history.push(DEFAULT_ROUTE)
  }
}

ConfirmTxScreen.prototype.componentDidUpdate = function (prevProps) {
  const {
    unapprovedTxs = {},
    network,
    selectedAddressTxList,
    send,
    history,
    match: { params: { id: transactionId } = {} },
  } = this.props

  let prevTx

  if (transactionId) {
    prevTx = R.find(({ id }) => id + '' === transactionId)(selectedAddressTxList)
  } else {
    const { index: prevIndex, unapprovedTxs: prevUnapprovedTxs } = prevProps
    const prevUnconfTxList = txHelper(prevUnapprovedTxs, {}, {}, {}, network)
    const prevTxData = prevUnconfTxList[prevIndex] || {}
    prevTx = selectedAddressTxList.find(({ id }) => id === prevTxData.id) || {}
  }

  const unconfTxList = txHelper(unapprovedTxs, {}, {}, {}, network)

  if (prevTx && prevTx.status === 'dropped') {
    this.props.dispatch(actions.showModal({
      name: 'TRANSACTION_CONFIRMED',
      onSubmit: () => history.push(DEFAULT_ROUTE),
    }))

    return
  }

  if (unconfTxList.length === 0 && !send.to && this.getUnapprovedMessagesTotal() === 0) {
    this.props.history.push(DEFAULT_ROUTE)
  }
}

ConfirmTxScreen.prototype.getTxData = function () {
  const {
    network,
    index,
    unapprovedTxs,
    unapprovedMsgs,
    unapprovedPersonalMsgs,
    unapprovedTypedMessages,
    match: { params: { id: transactionId } = {} },
  } = this.props

  const unconfTxList = txHelper(
    unapprovedTxs,
    unapprovedMsgs,
    unapprovedPersonalMsgs,
    unapprovedTypedMessages,
    network
  )

  log.info(`rendering a combined ${unconfTxList.length} unconf msgs & txs`)

  return transactionId
    ? R.find(({ id }) => id + '' === transactionId)(unconfTxList)
    : unconfTxList[index]
}

ConfirmTxScreen.prototype.signatureSelect = function (type, version) {
  // Temporarily direct only v3 and v4 requests to new code.
  if (type === 'eth_signTypedData' && (version === 'V3' || version === 'V4')) {
    return SignatureRequest
  }

  return SignatureRequestOriginal
}

ConfirmTxScreen.prototype.render = function () {
  const {
    currentCurrency,
    blockGasLimit,
    conversionRate,
  } = this.props

  const txData = this.getTxData() || {}
  const { msgParams, type, msgParams: { version } } = txData
  log.debug('msgParams detected, rendering pending msg')

  if (!msgParams) {
    return (
      <Loading />
    )
  }

  const SigComponent = this.signatureSelect(type, version)
  return (
    <SigComponent
      txData={txData}
      key={txData.id}
      selectedAddress={this.props.selectedAddress}
      accounts={this.props.accounts}
      identities={this.props.identities}
      conversionRate={conversionRate}
      currentCurrency={currentCurrency}
      blockGasLimit={blockGasLimit}
      signMessage={this.signMessage.bind(this, txData)}
      signPersonalMessage={this.signPersonalMessage.bind(this, txData)}
      signTypedMessage={this.signTypedMessage.bind(this, txData)}
      cancelMessage={this.cancelMessage.bind(this, txData)}
      cancelPersonalMessage={this.cancelPersonalMessage.bind(this, txData)}
      cancelTypedMessage={this.cancelTypedMessage.bind(this, txData)}
    />
  )
}

ConfirmTxScreen.prototype.signMessage = function (msgData, event) {
  log.info('conf-tx.js: signing message')
  const params = msgData.msgParams
  params.metamaskId = msgData.id
  this.stopPropagation(event)
  return this.props.dispatch(actions.signMsg(params))
}

ConfirmTxScreen.prototype.stopPropagation = function (event) {
  if (event.stopPropagation) {
    event.stopPropagation()
  }
}

ConfirmTxScreen.prototype.signPersonalMessage = function (msgData, event) {
  log.info('conf-tx.js: signing personal message')
  const params = msgData.msgParams
  params.metamaskId = msgData.id
  this.stopPropagation(event)
  return this.props.dispatch(actions.signPersonalMsg(params))
}

ConfirmTxScreen.prototype.signTypedMessage = function (msgData, event) {
  log.info('conf-tx.js: signing typed message')
  const params = msgData.msgParams
  params.metamaskId = msgData.id
  this.stopPropagation(event)
  return this.props.dispatch(actions.signTypedMsg(params))
}

ConfirmTxScreen.prototype.cancelMessage = function (msgData, event) {
  log.info('canceling message')
  this.stopPropagation(event)
  return this.props.dispatch(actions.cancelMsg(msgData))
}

ConfirmTxScreen.prototype.cancelPersonalMessage = function (msgData, event) {
  log.info('canceling personal message')
  this.stopPropagation(event)
  return this.props.dispatch(actions.cancelPersonalMsg(msgData))
}

ConfirmTxScreen.prototype.cancelTypedMessage = function (msgData, event) {
  log.info('canceling typed message')
  this.stopPropagation(event)
  return this.props.dispatch(actions.cancelTypedMsg(msgData))
}