import React from 'react';
import { connect } from 'react-redux';
import InputRange from 'react-input-range';
import AutosizeInput from 'react-input-autosize';
import screenfull from 'screenfull';
import FontAwesomeIcon from '@fortawesome/react-fontawesome';
import faAngleRight from '@fortawesome/fontawesome-free-solid/faAngleRight';
import faCaretDown from '@fortawesome/fontawesome-free-solid/faCaretDown';
import faCaretRight from '@fortawesome/fontawesome-free-solid/faCaretRight';
import faPlay from '@fortawesome/fontawesome-free-solid/faPlay';
import faChevronLeft from '@fortawesome/fontawesome-free-solid/faChevronLeft';
import faPause from '@fortawesome/fontawesome-free-solid/faPause';
import faExpandArrowsAlt from '@fortawesome/fontawesome-free-solid/faExpandArrowsAlt';
import faGithub from '@fortawesome/fontawesome-free-brands/faGithub';
import faTrashAlt from '@fortawesome/fontawesome-free-solid/faTrashAlt';
import faSave from '@fortawesome/fontawesome-free-solid/faSave';
import faShare from '@fortawesome/fontawesome-free-solid/faShare';
import faStar from '@fortawesome/fontawesome-free-solid/faStar';
import { GitHubApi } from '/apis';
import { classes } from '/common/util';
import { actions } from '/reducers';
import { languages } from '/common/config';
import { Button, Ellipsis, ListItem } from '/components';
import { tracerManager } from '/core';
import styles from './stylesheet.scss';
import Promise from 'bluebird';
import { withRouter } from 'react-router-dom';

@withRouter
@connect(({ current, env }) => ({ current, env }), actions)
class Header extends React.Component {
  constructor(props) {
    super(props);

    const { interval, paused, started } = tracerManager;
    this.state = {
      interval, paused, started,
      profile: {
        avatar_url: null,
        login: null,
      },
    };
  }

  componentDidMount() {
    const { signedIn } = this.props.env;
    if (signedIn) {
      GitHubApi.getProfile()
        .then(result => {
          const { avatar_url, login } = result;
          const profile = { avatar_url, login };
          this.setState({ profile });
        });
    }

    tracerManager.setOnUpdateStatus(update => this.setState(update));
  }

  componentWillUnmount() {
    tracerManager.setOnUpdateStatus(null);
  }

  handleClickFullScreen() {
    if (screenfull.enabled) {
      if (screenfull.isFullscreen) {
        screenfull.exit();
      } else {
        screenfull.request();
      }
    }
  }

  handleChangeTitle(e) {
    const { value } = e.target;
    this.props.renameScratchPaper(value);
  }

  saveGist() {
    const { gistId, titles, files } = this.props.current;
    const gist = {
      description: titles[1],
      files: {
        'algorithm-visualizer': {
          content: 'https://algorithm-visualizer.org/',
        },
      },
    };
    files.forEach(file => {
      gist.files[file.name] = {
        content: file.content,
      };
    });
    const savePromise = gistId === 'new' ? GitHubApi.createGist(gist) : GitHubApi.editGist(gistId, gist);
    savePromise.then(data => this.props.saveScratchPaper(data.id)).then(this.props.loadScratchPapers);
  }

  deleteGist() {
    const { gistId } = this.props.current;
    const deletePromise = gistId === 'new' ? Promise.resolve() : GitHubApi.deleteGist(gistId);
    deletePromise.then(() => this.props.loadAlgorithm({})).then(this.props.loadScratchPapers);
  }

  render() {
    const { interval, paused, started, profile } = this.state;
    const { className, onClickTitleBar, navigatorOpened, onAction } = this.props;
    const { gistId, titles, saved } = this.props.current;
    const { signedIn, ext } = this.props.env;

    return (
      <header className={classes(styles.header, className)}>
        <div className={styles.row}>
          <div className={styles.section}>
            <Button className={styles.title_bar} onClick={onClickTitleBar}>
              {
                titles.map((title, i) => [
                  gistId && i === 1 ?
                    <AutosizeInput className={styles.input_title} key={`title-${i}`} value={title}
                                   onClick={e => e.stopPropagation()} onChange={e => this.handleChangeTitle(e)} /> :
                    <Ellipsis key={`title-${i}`}>{title}</Ellipsis>,
                  i < titles.length - 1 &&
                  <FontAwesomeIcon className={styles.nav_arrow} fixedWidth icon={faAngleRight} key={`arrow-${i}`} />,
                ])
              }
              <FontAwesomeIcon className={styles.nav_caret} fixedWidth
                               icon={navigatorOpened ? faCaretDown : faCaretRight} />
            </Button>
          </div>
          <div className={styles.section}>
            <Button icon={faSave} primary disabled={!gistId || saved} onClick={() => this.saveGist()}>Save</Button>
            <Button icon={faTrashAlt} primary disabled={!gistId} onClick={() => this.deleteGist()}>Delete</Button>
            <Button icon={faShare} primary disabled={gistId === 'new'} onClick={() => this.shareLink()}>Share</Button>
            <Button icon={faExpandArrowsAlt} primary
                    onClick={() => this.handleClickFullScreen()}>Fullscreen</Button>
          </div>
        </div>
        <div className={styles.row}>
          <div className={styles.section}>
            {
              signedIn ?
                <Button className={styles.btn_dropdown} icon={profile.avatar_url}>
                  {profile.login}
                  <div className={styles.dropdown}>
                    <ListItem href="/api/auth/destroy" label="Sign Out" />
                  </div>
                </Button> :
                <Button icon={faGithub} primary href="/api/auth/request">
                  <Ellipsis>Sign In</Ellipsis>
                </Button>
            }
            <Button className={styles.btn_dropdown} icon={faStar}>
              {languages.find(language => language.ext === ext).name}
              <div className={styles.dropdown}>
                {
                  languages.map(language => language.ext === ext ? null : (
                    <ListItem key={language.ext} onClick={() => this.props.setExt(language.ext)}
                              label={language.name} />
                  ))
                }
              </div>
            </Button>
          </div>
          <div className={styles.section} onClick={onAction}>
            {
              started ? (
                <Button icon={faPlay} primary onClick={() => tracerManager.run()} active>Rerun</Button>
              ) : (
                <Button icon={faPlay} primary onClick={() => tracerManager.run()}>Run</Button>
              )
            }
            <Button icon={faChevronLeft} primary disabled={!started}
                    onClick={() => tracerManager.prev()}>Prev</Button>
            {
              paused ? (
                <Button icon={faPause} primary onClick={() => tracerManager.resume()} active>Resume</Button>
              ) : (
                <Button icon={faPause} primary disabled={!started}
                        onClick={() => tracerManager.pause()}>Pause</Button>
              )
            }
            <Button icon={faCaretRight} reverse primary disabled={!started}
                    onClick={() => tracerManager.next()}>Next</Button>
            <div className={styles.interval}>
              Speed
              <InputRange
                classNames={{
                  inputRange: styles.range,
                  labelContainer: styles.range_label_container,
                  slider: styles.range_slider,
                  track: styles.range_track,
                }}
                maxValue={2000}
                minValue={100}
                step={100}
                value={interval}
                onChange={interval => tracerManager.setInterval(interval)} />
            </div>
          </div>
        </div>
      </header>
    );
  }
}

export default Header;