/**
 *  Copyright (C) 2018 Basalt
    This file is part of Knapsack.
    Knapsack 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 2 of the License, or (at your option)
    any later version.

    Knapsack 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 Knapsack; if not, see <https://www.gnu.org/licenses>.
 */
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { Link } from 'react-router-dom';
import shortid from 'shortid';
import { Query } from 'react-apollo';
import gql from 'graphql-tag';
import { KsButton, StatusMessage } from '@knapsack/design-system';
import { apiUrlBase, BASE_PATHS } from '../../lib/constants';
import PageWithSidebar from '../layouts/page-with-sidebar';
import './page-builder-landing-page.scss';

const examplesQuery = gql`
  {
    pageBuilderPages {
      title
      id
    }
  }
`;

class PageBuilderLandingPage extends Component {
  constructor(props) {
    super(props);
    this.state = {
      statusMessage: '',
    };
    this.makeNewExample = this.makeNewExample.bind(this);
  }

  makeNewExample() {
    if (!this.props.context.permissions.includes('write')) {
      this.setState({
        statusMessage:
          'A new page builder example can not be made at this time as this feature has been disabled on this instance. Please see your configuration to make adjustments.',
      });
      setTimeout(() => {
        this.setState({
          statusMessage: '',
        });
      }, 8000);
    } else {
      const id = shortid.generate();
      window
        .fetch(`${apiUrlBase}${BASE_PATHS.PAGE_BUILDER}/${id}`, {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
          },
          body: JSON.stringify({
            id,
            title: 'My New Example',
            path: `${BASE_PATHS.PAGE_BUILDER}/${id}`,
            slices: [],
          }),
        })
        .then(res => {
          res.json();
        })
        .then(() => {
          window.location = `${BASE_PATHS.PAGE_BUILDER}/${id}`;
        });
    }
  }

  render() {
    const canWrite = true;
    return (
      <Query query={examplesQuery}>
        {({ data }) => {
          const { pageBuilderPages = [] } = data;
          return (
            <PageWithSidebar location={this.props.location}>
              <h4 className="eyebrow">Prototyping Pages</h4>
              <h2>Page Builder</h2>
              {this.state.statusMessage && (
                <StatusMessage
                  message={this.state.statusMessage}
                  type="error"
                />
              )}
              <div className="page-builder-landing-page__two-up">
                <div>
                  <h3>What is prototyping?</h3>
                  <p>
                    Website prototypes are mock-ups or demos of what a website
                    will look like when it is in production. Our powerful
                    prototyping tool allows designers to quickly assemble,
                    arrange, and add content to the reusable components of a
                    design system. This allows designers and content editors to
                    rapidly test new ideas, create example page layouts, and
                    share ideas with the rest of the team.
                  </p>
                </div>
                <div>
                  <h3>Pages</h3>
                  <ul>
                    {pageBuilderPages.map(({ id, title }) => (
                      <li key={id}>
                        <Link to={`${BASE_PATHS.PAGE_BUILDER}/${id}`}>
                          {title}
                        </Link>
                      </li>
                    ))}
                  </ul>
                </div>
              </div>
              <div>
                <h3>Create a New Page</h3>
                {(canWrite && (
                  <KsButton
                    primary
                    onClick={this.makeNewExample}
                    onKeyPress={this.makeNewExample}
                    type="submit"
                  >
                    Get Started
                  </KsButton>
                )) || (
                  <KsButton primary type="submit" disabled>
                    Get Started (disabled)
                  </KsButton>
                )}
              </div>
            </PageWithSidebar>
          );
        }}
      </Query>
    );
  }
}

PageBuilderLandingPage.defaultProps = {
  location: BASE_PATHS.PAGE_BUILDER,
};

PageBuilderLandingPage.propTypes = {
  location: PropTypes.object,
};

export default PageBuilderLandingPage;