/*
 *
 * HomePage
 *
 */

import React from 'react';
import { connect } from 'react-redux';
import Helmet from 'react-helmet';
import { FormattedMessage } from 'react-intl';
import { bindActionCreators, compose } from 'redux';
import { createStructuredSelector } from 'reselect';
import PropTypes from 'prop-types';
import { get, isEmpty, upperFirst } from 'lodash';
import cn from 'classnames';

import Block from 'components/HomePageBlock/Loadable';
import Button from 'components/Button';
import Sub from 'components/Sub/Loadable';
import Input from 'components/InputText';
import SupportUsCta from 'components/SupportUsCta/Loadable';
import SupportUsTitle from 'components/SupportUsTitle/Loadable';

import { selectPlugins } from 'containers/App/selectors';

import auth from 'utils/auth';
import injectReducer from 'utils/injectReducer';
import injectSaga from 'utils/injectSaga';
import validateInput from 'utils/inputsValidations';

import BlockLink from './BlockLink';
import CommunityContent from './CommunityContent';
import CreateContent from './CreateContent';
import SocialLink from './SocialLink';
import WelcomeContent from './WelcomeContent';

import { getArticles, onChange, submit } from './actions';
import makeSelectHomePage from './selectors';
import reducer from './reducer';
import saga from './saga';
import styles from './styles.scss';

const FIRST_BLOCK = [
  {
    title: {
      id: 'app.components.HomePage.welcome',
    },
    content: () => <WelcomeContent />,
  },
  {
    title: {
      id: 'app.components.HomePage.create',
    },
    content: () => <CreateContent />,
  },
];

const WELCOME_AGAIN_BLOCK = [
  {
    title: {
      id: 'app.components.HomePage.welcome.again',
    },
    name: upperFirst(`${get(auth.getUserInfo(), 'username')}!`),
    content: () => <WelcomeContent hasContent />,
  },
];

const FIRST_BLOCK_LINKS = [
  {
    link: 'https://strapi.io/documentation/',
    content: {
      id: 'app.components.BlockLink.documentation.content',
    },
    isDocumentation: true,
    title: {
      id: 'app.components.BlockLink.documentation',
    },
  },
  {
    link: 'https://github.com/strapi/strapi-examples',
    content: {
      id: 'app.components.BlockLink.code.content',
    },
    isDocumentation: false,
    title: {
      id: 'app.components.BlockLink.code',
    },
  },
];

const SECOND_BLOCK = {
  title: {
    id: 'app.components.HomePage.community',
  },
  content: () => <CommunityContent />,
};

const SOCIAL_LINKS = [
  {
    name: 'GitHub',
    link: 'https://github.com/strapi/strapi/',
  },
  {
    name: 'Slack',
    link: 'https://slack.strapi.io/',
  },
  {
    name: 'Medium',
    link: 'https://medium.com/@strapi',
  },
  {
    name: 'Twitter',
    link: 'https://twitter.com/strapijs',
  },
  {
    name: 'Reddit',
    link: 'https://www.reddit.com/r/node/search?q=strapi',
  },
  {
    name: 'Stack Overflow',
    link: 'https://stackoverflow.com/questions/tagged/strapi',
  },
];

export class HomePage extends React.PureComponent {
  // eslint-disable-line react/prefer-stateless-function
  state = { errors: [] };

  componentDidMount() {
    this.props.getArticles();
  }

  handleSubmit = e => {
    e.preventDefault();
    const errors = validateInput(this.props.homePage.body.email, { required: true }, 'email');
    this.setState({ errors });

    if (isEmpty(errors)) {
      return this.props.submit();
    }
  };

  showFirstBlock = () =>
    get(this.props.plugins.toJS(), 'content-manager.leftMenuSections.0.links', []).length === 0;

  renderButton = () => {
    const data = this.showFirstBlock()
      ? {
        className: styles.homePageTutorialButton,
        href: 'https://strapi.io/documentation/getting-started/quick-start.html',
        id: 'app.components.HomePage.button.quickStart',
        primary: true,
      }
      : {
        className: styles.homePageBlogButton,
        id: 'app.components.HomePage.button.blog',
        href: 'https://blog.strapi.io/',
        primary: false,
      };

    return (
      <a href={data.href} target="_blank">
        <Button className={data.className} primary={data.primary}>
          <FormattedMessage id={data.id} />
        </Button>
      </a>
    );
  };

  render() {
    const { homePage: { articles, body } } = this.props;

    return (
      <div className={cn('container-fluid', styles.containerFluid)}>
        <Helmet title="Home Page" />
        <div className="row">
          <div className="col-md-8 col-lg-8">
            <Block>
              {this.showFirstBlock() &&
                FIRST_BLOCK.map((value, key) => (
                  <Sub key={key} {...value} underline={key === 0} bordered={key === 0} />
                ))}
              {!this.showFirstBlock() &&
                WELCOME_AGAIN_BLOCK.concat(articles).map((value, key) => (
                  <Sub
                    key={key}
                    {...value}
                    bordered={key === 0}
                    style={key === 1 ? { marginBottom: '33px' } : {}}
                    underline={key === 0}
                  />
                ))}
              {this.renderButton()}
              <div className={styles.homePageFlex}>
                {FIRST_BLOCK_LINKS.map((value, key) => <BlockLink {...value} key={key} />)}
              </div>
            </Block>
            <Block>
              <Sub {...SECOND_BLOCK} />
              <div className={styles.homePageFlex}>
                <div className="row" style={{ width: '100%', marginRight: '0' }}>
                  {SOCIAL_LINKS.map((value, key) => <SocialLink key={key} {...value} />)}
                </div>
                <div className={styles.newsLetterWrapper}>
                  <div>
                    <FormattedMessage id="app.components.HomePage.newsLetter" />
                  </div>
                  <form onSubmit={this.handleSubmit}>
                    <div className={cn(styles.homePageForm, 'row')}>
                      <div className="col-md-12">
                        <Input
                          value={body.email}
                          onChange={this.props.onChange}
                          name=""
                          placeholder="johndoe@gmail.com"
                          error={!isEmpty(this.state.errors)}
                        />
                        <FormattedMessage id="app.components.HomePage.cta">
                          {message => <button type="submit">{message}</button>}
                        </FormattedMessage>
                      </div>
                    </div>
                  </form>
                </div>
              </div>
            </Block>
          </div>
          <div className="col-lg-4 col-md-4">
            <Block className={styles.blockShirt}>
              <div>
                <SupportUsTitle />
                <FormattedMessage id="app.components.HomePage.support.content">
                  {message => <p>{message}</p>}
                </FormattedMessage>
                <SupportUsCta />
              </div>
            </Block>
          </div>
        </div>
      </div>
    );
  }
}

HomePage.propTypes = {
  getArticles: PropTypes.func.isRequired,
  homePage: PropTypes.object.isRequired,
  onChange: PropTypes.func.isRequired,
  plugins: PropTypes.object.isRequired,
  submit: PropTypes.func.isRequired,
};

const mapStateToProps = createStructuredSelector({
  homePage: makeSelectHomePage(),
  plugins: selectPlugins(),
});

function mapDispatchToProps(dispatch) {
  return bindActionCreators(
    {
      getArticles,
      onChange,
      submit,
    },
    dispatch,
  );
}

const withConnect = connect(mapStateToProps, mapDispatchToProps);

const withReducer = injectReducer({ key: 'homePage', reducer });
const withSaga = injectSaga({ key: 'homePage', saga });

// export default connect(mapDispatchToProps)(HomePage);
export default compose(withReducer, withSaga, withConnect)(HomePage);