import preloader from '@fortawesome/fontawesome-free-solid/faCircleNotch';
import FontAwesomeIcon from '@fortawesome/react-fontawesome';
import { isEmpty, mapObjIndexed, pick } from 'ramda';
import React from 'react';
import { Doughnut, HorizontalBar } from 'react-chartjs-2';
import Moment from 'react-moment';
import { connect } from 'react-redux';
import { Card, CardBody, CardHeader, UncontrolledTooltip } from 'reactstrap';
import PropTypes from 'prop-types';
import DateInput from '../common/DateInput';
import MutedMessage from '../utils/MuttedMessage';
import ExternalLink from '../utils/ExternalLink';
import { serverType } from '../servers/prop-types/index';
import { getShortUrlVisits, shortUrlVisitsType } from './reducers/shortUrlVisits';
import {
  processOsStats,
  processBrowserStats,
  processCountriesStats,
  processReferrersStats,
} from './services/VisitsParser';
import './ShortUrlVisits.scss';

export class ShortUrlsVisitsComponent extends React.Component {
  static propTypes = {
    processOsStats: PropTypes.func,
    processBrowserStats: PropTypes.func,
    processCountriesStats: PropTypes.func,
    processReferrersStats: PropTypes.func,
    match: PropTypes.object,
    getShortUrlVisits: PropTypes.func,
    selectedServer: serverType,
    shortUrlVisits: shortUrlVisitsType,
  };
  static defaultProps = {
    processOsStats,
    processBrowserStats,
    processCountriesStats,
    processReferrersStats,
  };

  state = { startDate: undefined, endDate: undefined };
  loadVisits = () => {
    const { match: { params }, getShortUrlVisits } = this.props;

    getShortUrlVisits(params.shortCode, mapObjIndexed(
      (value) => value && value.format ? value.format('YYYY-MM-DD') : value,
      this.state
    ));
  };

  componentDidMount() {
    this.loadVisits();
  }

  render() {
    const {
      match: { params },
      selectedServer,
      processOsStats,
      processBrowserStats,
      processCountriesStats,
      processReferrersStats,
      shortUrlVisits: { visits, loading, error, shortUrl },
    } = this.props;
    const serverUrl = selectedServer ? selectedServer.url : '';
    const shortLink = `${serverUrl}/${params.shortCode}`;
    const generateGraphData = (stats, label, isBarChart) => ({
      labels: Object.keys(stats),
      datasets: [
        {
          label,
          data: Object.values(stats),
          backgroundColor: isBarChart ? 'rgba(70, 150, 229, 0.4)' : [
            '#97BBCD',
            '#DCDCDC',
            '#F7464A',
            '#46BFBD',
            '#FDB45C',
            '#949FB1',
            '#4D5360',
          ],
          borderColor: isBarChart ? 'rgba(70, 150, 229, 1)' : 'white',
          borderWidth: 2,
        },
      ],
    });
    const renderGraphCard = (title, stats, isBarChart, label) => (
      <div className="col-md-6">
        <Card className="mt-4">
          <CardHeader>{title}</CardHeader>
          <CardBody>
            {!isBarChart && (
              <Doughnut
                data={generateGraphData(stats, label || title, isBarChart)}
                options={{
                  legend: {
                    position: 'right',
                  },
                }}
              />
            )}
            {isBarChart && (
              <HorizontalBar
                data={generateGraphData(stats, label || title, isBarChart)}
                options={{
                  legend: {
                    display: false,
                  },
                }}
              />
            )}
          </CardBody>
        </Card>
      </div>
    );
    const renderContent = () => {
      if (loading) {
        return <MutedMessage><FontAwesomeIcon icon={preloader} spin /> Loading...</MutedMessage>;
      }

      if (error) {
        return (
          <Card className="mt-4" body inverse color="danger">
            An error occurred while loading visits :(
          </Card>
        );
      }

      if (isEmpty(visits)) {
        return <MutedMessage>There have been no visits matching current filter  :(</MutedMessage>;
      }

      return (
        <div className="row">
          {renderGraphCard('Operating systems', processOsStats(visits), false)}
          {renderGraphCard('Browsers', processBrowserStats(visits), false)}
          {renderGraphCard('Countries', processCountriesStats(visits), true, 'Visits')}
          {renderGraphCard('Referrers', processReferrersStats(visits), true, 'Visits')}
        </div>
      );
    };

    const renderCreated = () => (
      <span>
        <b id="created"><Moment fromNow>{shortUrl.dateCreated}</Moment></b>
        <UncontrolledTooltip placement="bottom" target="created">
          <Moment format="YYYY-MM-DD HH:mm">{shortUrl.dateCreated}</Moment>
        </UncontrolledTooltip>
      </span>
    );

    return (
      <div className="shlink-container">
        <header>
          <Card className="bg-light">
            <CardBody>
              <h2>
                {
                  shortUrl.visitsCount &&
                  <span className="badge badge-main float-right">Visits: {shortUrl.visitsCount}</span>
                }
                Visit stats for <ExternalLink href={shortLink}>{shortLink}</ExternalLink>
              </h2>
              <hr />
              {shortUrl.dateCreated && (
                <div>
                  Created:
                  &nbsp;
                  {loading && <small>Loading...</small>}
                  {!loading && renderCreated()}
                </div>
              )}
              <div>
                Long URL:
                &nbsp;
                {loading && <small>Loading...</small>}
                {!loading && <ExternalLink href={shortUrl.longUrl}>{shortUrl.longUrl}</ExternalLink>}
              </div>
            </CardBody>
          </Card>
        </header>

        <section className="mt-4">
          <div className="row">
            <div className="col-xl-3 col-lg-4 col-md-6 offset-xl-6 offset-lg-4">
              <DateInput
                selected={this.state.startDate}
                placeholderText="Since"
                isClearable
                onChange={(date) => this.setState({ startDate: date }, () => this.loadVisits())}
              />
            </div>
            <div className="col-xl-3 col-lg-4 col-md-6">
              <DateInput
                selected={this.state.endDate}
                placeholderText="Until"
                isClearable
                className="short-url-visits__date-input"
                onChange={(date) => this.setState({ endDate: date }, () => this.loadVisits())}
              />
            </div>
          </div>
        </section>

        <section>
          {renderContent()}
        </section>
      </div>
    );
  }
}

const ShortUrlsVisits = connect(
  pick([ 'selectedServer', 'shortUrlVisits' ]),
  { getShortUrlVisits }
)(ShortUrlsVisitsComponent);

export default ShortUrlsVisits;