import React from 'react';
import { Helmet } from 'react-helmet-async';
import { FormattedMessage, injectIntl } from 'react-intl';
import classNames from 'classnames';
import { Row, Col, Icon, Affix, Tooltip } from 'antd';
import { getChildren } from 'jsonml.js/lib/utils';
import Demo from './Demo';
import EditButton from './EditButton';
import { ping, getMetaDescription } from '../utils';

class ComponentDoc extends React.Component {
  state = {
    expandAll: false,
    visibleAll: process.env.NODE_ENV !== 'production',
    showRiddleButton: false,
  };

  componentDidMount() {
    const { demos = {}, location = {} } = this.props;
    if (location.hash) {
      const demoKey = location.hash.split('-demo-')[1];
      const demoData = demos[demoKey];
      if (demoData && demoData.meta && demoData.meta.debug) {
        this.setState({ visibleAll: true });
      }
    }
    this.pingTimer = ping(status => {
      if (status !== 'timeout' && status !== 'error') {
        this.setState({
          showRiddleButton: true,
        });
      }
    });
  }

  shouldComponentUpdate(nextProps, nextState) {
    const { location } = this.props;
    const { location: nextLocation } = nextProps;
    const { expandAll, visibleAll, showRiddleButton } = this.state;
    const {
      expandAll: nextExpandAll,
      visibleAll: nextVisibleAll,
      showRiddleButton: nextShowRiddleButton,
    } = nextState;

    if (
      nextLocation.pathname === location.pathname &&
      expandAll === nextExpandAll &&
      visibleAll === nextVisibleAll &&
      showRiddleButton === nextShowRiddleButton
    ) {
      return false;
    }
    return true;
  }

  componentWillUnmount() {
    clearTimeout(this.pingTimer);
  }

  handleExpandToggle = () => {
    const { expandAll } = this.state;
    this.setState({
      expandAll: !expandAll,
    });
  };

  handleVisibleToggle = () => {
    const { visibleAll } = this.state;
    this.setState({
      visibleAll: !visibleAll,
    });
  };

  render() {
    const {
      doc,
      location,
      intl: { locale },
      utils,
      demos,
    } = this.props;
    const { content, meta } = doc;
    const demoValues = Object.keys(demos).map(key => demos[key]);
    const { expandAll, visibleAll, showRiddleButton } = this.state;
    const isSingleCol = meta.cols === 1;
    const leftChildren = [];
    const rightChildren = [];
    let showedDemo = demoValues.some(demo => demo.meta.only)
      ? demoValues.filter(demo => demo.meta.only)
      : demoValues.filter(demo => demo.preview);
    if (!visibleAll) {
      showedDemo = showedDemo.filter(item => !item.meta.debug);
    }
    showedDemo
      .sort((a, b) => a.meta.order - b.meta.order)
      .forEach((demoData, index) => {
        const demoElem = (
          <Demo
            {...demoData}
            key={demoData.meta.filename}
            utils={utils}
            expand={expandAll}
            location={location}
          />
        );
        if (index % 2 === 0 || isSingleCol) {
          leftChildren.push(demoElem);
        } else {
          rightChildren.push(demoElem);
        }
      });
    const expandTriggerClass = classNames({
      'code-box-expand-trigger': true,
      'code-box-expand-trigger-active': expandAll,
    });

    const jumper = showedDemo.map(demo => {
      const { title } = demo.meta;
      const localizeTitle = title[locale] || title;
      return (
        <li key={demo.meta.id} title={localizeTitle}>
          <a href={`#${demo.meta.id}`}>{localizeTitle}</a>
        </li>
      );
    });

    const { title, subtitle, filename } = meta;
    const articleClassName = classNames({
      'show-riddle-button': showRiddleButton,
    });
    const helmetTitle = `${subtitle || ''} ${title[locale] || title} - Ant Design`;
    const contentChild = getMetaDescription(getChildren(content));

    return (
      <article className={articleClassName}>
        <Helmet encodeSpecialCharacters={false}>
          {helmetTitle && <title>{helmetTitle}</title>}
          {helmetTitle && <meta property="og:title" content={helmetTitle} />}
          {contentChild && <meta name="description" content={contentChild} />}
        </Helmet>
        <Affix className="toc-affix" offsetTop={16}>
          <ul id="demo-toc" className="toc">
            {jumper}
          </ul>
        </Affix>
        <section className="markdown">
          <h1>
            {title[locale] || title}
            {!subtitle ? null : <span className="subtitle">{subtitle}</span>}
            <EditButton
              title={<FormattedMessage id="app.content.edit-page" />}
              filename={filename}
            />
          </h1>
          {utils.toReactComponent(
            ['section', { className: 'markdown' }].concat(getChildren(content)),
          )}
          <h2>
            <FormattedMessage id="app.component.examples" />
            <span style={{ float: 'right' }}>
              <Tooltip
                title={
                  <FormattedMessage
                    id={`app.component.examples.${expandAll ? 'collapse' : 'expand'}`}
                  />
                }
              >
                <Icon
                  type="code"
                  theme={expandAll ? 'filled' : 'outlined'}
                  className={expandTriggerClass}
                  onClick={this.handleExpandToggle}
                />
              </Tooltip>
              <Tooltip
                title={
                  <FormattedMessage
                    id={`app.component.examples.${visibleAll ? 'hide' : 'visible'}`}
                  />
                }
              >
                <Icon
                  type="bug"
                  theme={visibleAll ? 'filled' : 'outlined'}
                  className={expandTriggerClass}
                  onClick={this.handleVisibleToggle}
                />
              </Tooltip>
            </span>
          </h2>
        </section>
        <Row gutter={16}>
          <Col
            span={isSingleCol ? 24 : 12}
            className={isSingleCol ? 'code-boxes-col-1-1' : 'code-boxes-col-2-1'}
          >
            {leftChildren}
          </Col>
          {isSingleCol ? null : (
            <Col className="code-boxes-col-2-1" span={12}>
              {rightChildren}
            </Col>
          )}
        </Row>
        {utils.toReactComponent(
          [
            'section',
            {
              className: 'markdown api-container',
            },
          ].concat(getChildren(doc.api || ['placeholder'])),
        )}
      </article>
    );
  }
}

export default injectIntl(ComponentDoc);