/**
 * Copyright (C) 2018 Noah Loomans
 *
 * This file is part of rooster.hetmml.nl.
 *
 * rooster.hetmml.nl 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.
 *
 * rooster.hetmml.nl 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 rooster.hetmml.nl.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

import React from 'react';
import PropTypes from 'prop-types';
import moment from 'moment';
import { withRouter } from 'react-router-dom';

import ArrowBackIcon from 'react-icons/lib/md/arrow-back';
import ArrowForwardIcon from 'react-icons/lib/md/arrow-forward';

import purifyWeek from '../../lib/purifyWeek';
import { setWeek, weekFromLocation } from '../../lib/url';

import './WeekSelector.scss';

class WeekSelector extends React.Component {
  static propTypes = {
    // react-router
    location: PropTypes.object.isRequired,
    history: PropTypes.object.isRequired,
  };

  getWeekText() {
    const week = weekFromLocation(this.props.location);

    const currentWeek = moment().week();

    if (currentWeek === week) {
      return `Huidige week • ${week}`;
    } else if (currentWeek + 1 === week) {
      return `Volgende week • ${week}`;
    } else if (currentWeek - 1 === week) {
      return `Vorige week • ${week}`;
    }

    return `Week ${week}`;
  }

  updateWeek(change) {
    const week = weekFromLocation(this.props.location);

    const newWeek = purifyWeek(week + change);
    const isCurrentWeek = moment().week() === newWeek;

    setWeek(
      isCurrentWeek ? undefined : newWeek,
      this.props.location,
      this.props.history,
    );
  }

  render() {
    return (
      <div className="WeekSelector">
        <button onClick={() => this.updateWeek(-1)}><ArrowBackIcon /></button>
        <div className="text">{this.getWeekText()}</div>
        <button onClick={() => this.updateWeek(+1)}><ArrowForwardIcon /></button>
      </div>
    );
  }
}

export default withRouter(WeekSelector);