// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity.  If not, see <http://www.gnu.org/licenses/>.

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { FormattedMessage } from 'react-intl';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import { uniq, isEqual } from 'lodash';

import { setVisibleAccounts } from '@parity/shared/redux/providers/personalActions';
import { Actionbar, ActionbarSearch, ActionbarSort, Button, Page } from '@parity/ui';
import { AddIcon } from '@parity/ui/Icons';

import List from '@parity/dapp-accounts/List';

import AddContract from './AddContract';
import DeployContract from './DeployContract';

const META_SORT = [
  {
    key: 'timestamp',
    label: (
      <FormattedMessage
        id='contracts.sortOrder.date'
        defaultMessage='date'
      />
    )
  },
  {
    key: 'blockNumber:-1',
    label: (
      <FormattedMessage
        id='contracts.sortOrder.minedBlock'
        defaultMessage='mined block'
      />
    )
  }
];

class Contracts extends Component {
  static contextTypes = {
    api: PropTypes.object.isRequired
  }

  static propTypes = {
    setVisibleAccounts: PropTypes.func.isRequired,

    accounts: PropTypes.object,
    contracts: PropTypes.object,
    hasContracts: PropTypes.bool
  }

  state = {
    addContract: false,
    deployContract: false,
    sortOrder: 'blockNumber:-1',
    searchValues: [],
    searchTokens: []
  }

  componentWillMount () {
    this.setVisibleAccounts();
  }

  componentWillReceiveProps (nextProps) {
    const prevAddresses = Object.keys(this.props.contracts);
    const nextAddresses = Object.keys(nextProps.contracts);

    if (prevAddresses.length !== nextAddresses.length || !isEqual(prevAddresses.sort(), nextAddresses.sort())) {
      this.setVisibleAccounts(nextProps);
    }
  }

  componentWillUnmount () {
    this.props.setVisibleAccounts([]);
  }

  setVisibleAccounts (props = this.props) {
    const { contracts, setVisibleAccounts } = props;
    const addresses = Object.keys(contracts);

    setVisibleAccounts(addresses);
  }

  render () {
    const { contracts, hasContracts } = this.props;
    const { searchValues, sortOrder } = this.state;

    return (
      <div>
        { this.renderActionbar() }
        { this.renderAddContract() }
        { this.renderDeployContract() }
        <Page>
          <List
            link='contract'
            search={ searchValues }
            accounts={ contracts }
            empty={ !hasContracts }
            order={ sortOrder }
            orderFallback='name'
            handleAddSearchToken={ this.onAddSearchToken }
          />
        </Page>
      </div>
    );
  }

  renderSortButton () {
    const { sortOrder } = this.state;

    return (
      <ActionbarSort
        key='sortAccounts'
        id='sortContracts'
        order={ sortOrder }
        metas={ META_SORT }
        showDefault={ false }
        onChange={ this.handleSortChange }
      />
    );
  }

  renderSearchButton () {
    const onChange = (searchTokens, searchValues) => {
      this.setState({ searchTokens, searchValues });
    };

    return (
      <ActionbarSearch
        key='searchContract'
        tokens={ this.state.searchTokens }
        onChange={ onChange }
      />
    );
  }

  renderActionbar () {
    const buttons = [
      <Button
        key='addContract'
        icon={ <AddIcon /> }
        label={
          <FormattedMessage
            id='contracts.buttons.watch'
            defaultMessage='watch'
          />
        }
        onClick={ this.onAddContract }
      />,
      <Button
        key='deployContract'
        icon={ <AddIcon /> }
        label={
          <FormattedMessage
            id='contracts.buttons.deploy'
            defaultMessage='deploy'
          />
        }
        onClick={ this.onDeployContract }
      />,
      this.renderSearchButton(),
      this.renderSortButton()
    ];

    return (
      <Actionbar
        title={
          <FormattedMessage
            id='contracts.title'
            defaultMessage='Contracts'
          />
        }
        buttons={ buttons }
      />
    );
  }

  renderAddContract () {
    const { contracts } = this.props;
    const { addContract } = this.state;

    if (!addContract) {
      return null;
    }

    return (
      <AddContract
        contracts={ contracts }
        onClose={ this.onAddContractClose }
      />
    );
  }

  renderDeployContract () {
    const { accounts } = this.props;
    const { deployContract } = this.state;

    if (!deployContract) {
      return null;
    }

    return (
      <DeployContract
        accounts={ accounts }
        onClose={ this.onDeployContractClose }
      />
    );
  }

  handleSortChange = (sortOrder) => {
    this.setState({ sortOrder });
  }

  onAddSearchToken = (token) => {
    const { searchTokens } = this.state;
    const newSearchTokens = uniq([].concat(searchTokens, token));

    this.setState({ searchTokens: newSearchTokens });
  }

  onDeployContractClose = () => {
    this.setState({ deployContract: false });
  }

  onDeployContract = () => {
    this.setState({ deployContract: true });
  }

  onAddContractClose = () => {
    this.setState({ addContract: false });
  }

  onAddContract = () => {
    this.setState({ addContract: true });
  }
}

function mapStateToProps (state) {
  const { accounts, contracts, hasContracts } = state.personal;

  return {
    accounts,
    contracts,
    hasContracts
  };
}

function mapDispatchToProps (dispatch) {
  return bindActionCreators({
    setVisibleAccounts
  }, dispatch);
}

export default connect(
  mapStateToProps,
  mapDispatchToProps
)(Contracts);