import React, { Component } from 'react'
import PropTypes from 'prop-types'
import Fuse from 'fuse.js'
import Identicon from '../../../../components/ui/identicon'
import { isValidAddress } from '../../../../helpers/utils/util'
import Dialog from '../../../../components/ui/dialog'
import ContactList from '../../../../components/app/contact-list'
import RecipientGroup from '../../../../components/app/contact-list/recipient-group/recipient-group.component'
import { ellipsify } from '../../send.utils'
import Button from '../../../../components/ui/button'

export default class AddRecipient extends Component {

  static propTypes = {
    query: PropTypes.string,
    ownedAccounts: PropTypes.array,
    addressBook: PropTypes.array,
    updateGas: PropTypes.func,
    updateSendTo: PropTypes.func,
    ensResolution: PropTypes.string,
    toError: PropTypes.string,
    ensResolutionError: PropTypes.string,
    addressBookEntryName: PropTypes.string,
    contacts: PropTypes.array,
    nonContacts: PropTypes.array,
  }

  constructor (props) {
    super(props)
    this.recentFuse = new Fuse(props.nonContacts, {
      shouldSort: true,
      threshold: 0.45,
      location: 0,
      distance: 100,
      maxPatternLength: 32,
      minMatchCharLength: 1,
      keys: [
        { name: 'address', weight: 0.5 },
      ],
    })

    this.contactFuse = new Fuse(props.contacts, {
      shouldSort: true,
      threshold: 0.45,
      location: 0,
      distance: 100,
      maxPatternLength: 32,
      minMatchCharLength: 1,
      keys: [
        { name: 'name', weight: 0.5 },
        { name: 'address', weight: 0.5 },
      ],
    })
  }

  static contextTypes = {
    t: PropTypes.func,
    metricsEvent: PropTypes.func,
  }

  state = {
    isShowingTransfer: false,
  }

  selectRecipient = (to, nickname = '') => {
    const { updateSendTo, updateGas } = this.props

    updateSendTo(to, nickname)
    updateGas({ to })
  }

  searchForContacts = () => {
    const { query, contacts } = this.props

    let _contacts = contacts

    if (query) {
      this.contactFuse.setCollection(contacts)
      _contacts = this.contactFuse.search(query)
    }

    return _contacts
  }

  searchForRecents = () => {
    const { query, nonContacts } = this.props

    let _nonContacts = nonContacts

    if (query) {
      this.recentFuse.setCollection(nonContacts)
      _nonContacts = this.recentFuse.search(query)
    }

    return _nonContacts
  }

  render () {
    const { ensResolution, query, addressBookEntryName } = this.props
    const { isShowingTransfer } = this.state

    let content

    if (isValidAddress(query)) {
      content = this.renderExplicitAddress(query)
    } else if (ensResolution) {
      content = this.renderExplicitAddress(ensResolution, addressBookEntryName || query)
    } else if (isShowingTransfer) {
      content = this.renderTransfer()
    }

    return (
      <div className="send__select-recipient-wrapper">
        { this.renderDialogs() }
        { content || this.renderMain() }
      </div>
    )
  }

  renderExplicitAddress (address, name) {
    return (
      <div
        key={address}
        className="send__select-recipient-wrapper__group-item"
        onClick={() => this.selectRecipient(address, name)}
      >
        <Identicon address={address} diameter={28} />
        <div className="send__select-recipient-wrapper__group-item__content">
          <div className="send__select-recipient-wrapper__group-item__title">
            {name || ellipsify(address)}
          </div>
          {
            name && (
              <div className="send__select-recipient-wrapper__group-item__subtitle">
                {ellipsify(address)}
              </div>
            )
          }
        </div>
      </div>
    )
  }

  renderTransfer () {
    const { ownedAccounts } = this.props
    const { t } = this.context

    return (
      <div className="send__select-recipient-wrapper__list">
        <Button
          type="link"
          className="send__select-recipient-wrapper__list__link"
          onClick={() => this.setState({ isShowingTransfer: false })}
        >
          <div className="send__select-recipient-wrapper__list__back-caret" />
          { t('backToAll') }
        </Button>
        <RecipientGroup
          label={t('myAccounts')}
          items={ownedAccounts}
          onSelect={this.selectRecipient}
        />
      </div>
    )
  }

  renderMain () {
    const { t } = this.context
    const { query, ownedAccounts = [], addressBook } = this.props

    return (
      <div className="send__select-recipient-wrapper__list">
        <ContactList
          addressBook={addressBook}
          searchForContacts={this.searchForContacts.bind(this)}
          searchForRecents={this.searchForRecents.bind(this)}
          selectRecipient={this.selectRecipient.bind(this)}
        >
          {
            (ownedAccounts && ownedAccounts.length > 1) && !query && (
              <Button
                type="link"
                className="send__select-recipient-wrapper__list__link"
                onClick={() => this.setState({ isShowingTransfer: true })}
              >
                { t('transferBetweenAccounts') }
              </Button>
            )
          }
        </ContactList>
      </div>
    )
  }

  renderDialogs () {
    const { toError, ensResolutionError, ensResolution } = this.props
    const { t } = this.context
    const contacts = this.searchForContacts()
    const recents = this.searchForRecents()

    if (contacts.length || recents.length) {
      return null
    }

    if (ensResolutionError) {
      return (
        <Dialog
          type="error"
          className="send__error-dialog"
        >
          {ensResolutionError}
        </Dialog>
      )
    }

    if (toError && toError !== 'required' && !ensResolution) {
      return (
        <Dialog
          type="error"
          className="send__error-dialog"
        >
          {t(toError)}
        </Dialog>
      )
    }

    return null
  }

}