import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import Button from '/imports/ui/components/button/component';
import styles from './styles.scss';

const intlMessages = defineMessages({
  previousSlideLabel: {
    id: 'app.presentation.presentationToolbar.prevSlideLabel',
    description: 'Previous slide button label',
  },
  nextSlideLabel: {
    id: 'app.presentation.presentationToolbar.nextSlideLabel',
    description: 'Next slide button label',
  },
});

class PresentationToolbar extends Component {
  static renderAriaLabelsDescs() {
    return (
      <div hidden >
        {/* Previous Slide button aria */}
        <div id="prevSlideLabel">
          <FormattedMessage
            id="app.presentation.presentationToolbar.prevSlideLabel"
            description="Aria label for when switching to previous slide"
            defaultMessage="Previous slide"
          />
        </div>
        <div id="prevSlideDescrip">
          <FormattedMessage
            id="app.presentation.presentationToolbar.prevSlideDescrip"
            description="Aria description for when switching to previous slide"
            defaultMessage="Change the presentation to the previous slide"
          />
        </div>
        {/* Next Slide button aria */}
        <div id="nextSlideLabel">
          <FormattedMessage
            id="app.presentation.presentationToolbar.nextSlideLabel"
            description="Aria label for when switching to next slide"
            defaultMessage="Next slide"
          />
        </div>
        <div id="nextSlideDescrip">
          <FormattedMessage
            id="app.presentation.presentationToolbar.nextSlideDescrip"
            description="Aria description for when switching to next slide"
            defaultMessage="Change the presentation to the next slide"
          />
        </div>
        {/* Skip Slide drop down aria */}
        <div id="skipSlideLabel">
          <FormattedMessage
            id="app.presentation.presentationToolbar.skipSlideLabel"
            description="Aria label for when switching to a specific slide"
            defaultMessage="Skip slide"
          />
        </div>
        <div id="skipSlideDescrip">
          <FormattedMessage
            id="app.presentation.presentationToolbar.skipSlideDescrip"
            description="Aria description for when switching to a specific slide"
            defaultMessage="Change the presentation to a specific slide"
          />
        </div>
        {/* Fit to width button aria */}
        <div id="fitWidthLabel">
          <FormattedMessage
            id="app.presentation.presentationToolbar.fitWidthLabel"
            description="Aria description to display the whole width of the slide"
            defaultMessage="Fit to width"
          />
        </div>
        <div id="fitWidthDescrip">
          <FormattedMessage
            id="app.presentation.presentationToolbar.fitWidthDescrip"
            description="Aria description to display the whole width of the slide"
            defaultMessage="Display the whole width of the slide"
          />
        </div>
        {/* Fit to screen button aria */}
        <div id="fitScreenLabel">
          <FormattedMessage
            id="app.presentation.presentationToolbar.fitScreenLabel"
            description="Aria label to display the whole slide"
            defaultMessage="Fit to screen"
          />
        </div>
        <div id="fitScreenDescrip">
          <FormattedMessage
            id="app.presentation.presentationToolbar.fitScreenDescrip"
            description="Aria label to display the whole slide"
            defaultMessage="Display the whole slide"
          />
        </div>
        {/* Zoom slider aria */}
        <div id="zoomLabel">
          <FormattedMessage
            id="app.presentation.presentationToolbar.zoomLabel"
            description="Aria label to zoom presentation"
            defaultMessage="Zoom"
          />
        </div>
        <div id="zoomDescrip">
          <FormattedMessage
            id="app.presentation.presentationToolbar.zoomDescrip"
            description="Aria label to zoom presentation"
            defaultMessage="Change the zoom level of the presentation"
          />
        </div>
      </div>
    );
  }

  static renderSkipSlideOpts(numberOfSlides) {
    // Fill drop down menu with all the slides in presentation
    const optionList = [];
    for (let i = 1; i <= numberOfSlides; i += 1) {
      optionList.push(
        <option
          value={i}
          key={i}
        >
        Slide {i}
        </option>,
      );
    }

    return optionList;
  }

  constructor(props) {
    super(props);

    this.state = { sliderValue: 100 };
    this.handleValuesChange = this.handleValuesChange.bind(this);
  }

  componentDidMount() {
    // to let the whiteboard know that the presentation area's size has changed
    window.dispatchEvent(new Event('resize'));
  }

  componentWillUnmount() {
    // to let the whiteboard know that the presentation area's size has changed
    window.dispatchEvent(new Event('resize'));
  }

  handleValuesChange(event) {
    this.setState({ sliderValue: event.target.value });
  }

  fitToWidthClickHandler() {
    this.setState({
      fitToWidthValue: 'not_implemented_yet',
    });
  }

  fitToScreenClickHandler() {
    this.setState({
      fitToScreenValue: 'not_implemented_yet',
    });
  }

  render() {
    const {
      currentSlideNum,
      numberOfSlides,
      actions,
      intl,
    } = this.props;

    return (
      <div id="presentationToolbarWrapper" className={styles.presentationToolbarWrapper}>
        {PresentationToolbar.renderAriaLabelsDescs()}
        <Button
          role="button"
          aria-labelledby="prevSlideLabel"
          aria-describedby="prevSlideDescrip"
          disabled={!(currentSlideNum > 1)}
          color={'default'}
          icon={'left_arrow'}
          size={'md'}
          onClick={actions.previousSlideHandler}
          label={intl.formatMessage(intlMessages.previousSlideLabel)}
          hideLabel
          className={styles.prevSlide}
        />
        <select
          // <select> has an implicit role of listbox, no need to define role="listbox" explicitly
          id="skipSlide"
          aria-labelledby="skipSlideLabel"
          aria-describedby="skipSlideDescrip"
          aria-live="polite"
          aria-relevant="all"
          value={currentSlideNum}
          onChange={actions.skipToSlideHandler}
          className={styles.skipSlide}
        >
          {PresentationToolbar.renderSkipSlideOpts(numberOfSlides)}
        </select>
        <Button
          role="button"
          aria-labelledby="nextSlideLabel"
          aria-describedby="nextSlideDescrip"
          disabled={!(currentSlideNum < numberOfSlides)}
          color={'default'}
          icon={'right_arrow'}
          size={'md'}
          onClick={actions.nextSlideHandler}
          label={intl.formatMessage(intlMessages.nextSlideLabel)}
          hideLabel
        />

        {/* Fit to width button
        <Button
          role="button"
          aria-labelledby="fitWidthLabel"
          aria-describedby="fitWidthDescrip"
          color={'default'}
          icon={'fit_to_width'}
          size={'md'}
          circle={false}
          onClick={this.fitToWidthClickHandler}
          label={'Fit to Width'}
          hideLabel={true}
        /> */}
        {/* Fit to screen button
        <Button
          role="button"
          aria-labelledby="fitScreenLabel"
          aria-describedby="fitScreenDescrip"
          color={'default'}
          icon={'fit_to_screen'}
          size={'md'}
          circle={false}
          onClick={this.fitToScreenClickHandler}
          label={'Fit to Screen'}
          hideLabel={true}
        /> */}
        {/* Zoom slider
        <div
          className={classNames(styles.zoomWrapper, { [styles.zoomWrapperNoBorder]: true })}
        >
          <div className={styles.zoomMinMax}> 100% </div>
          <input
            role="slider"
            aria-labelledby="zoomLabel"
            aria-describedby="zoomDescrip"
            aria-valuemax="400"
            aria-valuemin="100"
            aria-valuenow={this.state.sliderValue}
            value={this.state.sliderValue}
            step="5"
            type="range"
            min="100"
            max="400"
            onChange={this.handleValuesChange}
            onInput={this.handleValuesChange}
            className={styles.zoomSlider}
          />
          <div className={styles.zoomMinMax}> 400% </div>
        </div> */}
      </div>
    );
  }
}

PresentationToolbar.propTypes = {
  // Number of current slide being displayed
  currentSlideNum: PropTypes.number.isRequired,
  // Total number of slides in this presentation
  numberOfSlides: PropTypes.number.isRequired,
  // Actions required for the presenter toolbar
  actions: PropTypes.shape({
    nextSlideHandler: PropTypes.func.isRequired,
    previousSlideHandler: PropTypes.func.isRequired,
    skipToSlideHandler: PropTypes.func.isRequired,
  }).isRequired,
};

export default injectIntl(PresentationToolbar);