import ImmutablePropTypes from 'react-immutable-proptypes'
import ImmutablePureComponent from 'react-immutable-pure-component'
import { defineMessages, injectIntl } from 'react-intl'
import classNames from 'classnames/bind'
import { undoUploadCompose, changeUploadCompose } from '../../../actions/compose'
import { submitCompose } from '../../../actions/compose';
import Button from '../../../components/button'
import Image from '../../../components/image'
import Input from '../../../components/input'
import Text from '../../../components/text'

const cx = classNames.bind(_s)

const messages = defineMessages({
  description: { id: 'upload_form.description', defaultMessage: 'Describe for the visually impaired' },
  delete: { id: 'upload_form.undo', defaultMessage: 'Delete' },
})

const mapStateToProps = (state, { id }) => ({
  media: state.getIn(['compose', 'media_attachments']).find(item => item.get('id') === id),
})

const mapDispatchToProps = (dispatch) => ({
  onUndo: (id) => {
    dispatch(undoUploadCompose(id))
  },
  onDescriptionChange: (id, description) => {
    dispatch(changeUploadCompose(id, { description }))
  },
  onSubmit () {
    dispatch(submitCompose())
  },
});

export default
@injectIntl
@connect(mapStateToProps, mapDispatchToProps)
class Upload extends ImmutablePureComponent {

  static contextTypes = {
    router: PropTypes.object,
  }

  static propTypes = {
    media: ImmutablePropTypes.map.isRequired,
    intl: PropTypes.object.isRequired,
    onUndo: PropTypes.func.isRequired,
    onDescriptionChange: PropTypes.func.isRequired,
    onSubmit: PropTypes.func.isRequired,
  }

  state = {
    hovered: false,
    focused: false,
    dirtyDescription: null,
  }

  handleKeyDown = (e) => {
    if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
      this.handleSubmit()
    }
  }

  handleSubmit = () => {
    this.handleInputBlur()
    this.props.onSubmit()
  }

  handleUndoClick = (e) => {
    e.stopPropagation()
    this.props.onUndo(this.props.media.get('id'))
  }

  handleInputChange = (value) => {
    this.setState({ dirtyDescription: value })
  }

  handleMouseEnter = () => {
    this.setState({ hovered: true })
  }

  handleMouseLeave = () => {
    this.setState({ hovered: false })
  }

  handleInputFocus = () => {
    this.setState({ focused: true })
  }

  handleClick = () => {
    this.setState({ focused: true })
  }

  handleInputBlur = () => {
    const { dirtyDescription } = this.state

    this.setState({
      focused: false,
      dirtyDescription: null,
    })

    if (dirtyDescription !== null) {
      this.props.onDescriptionChange(this.props.media.get('id'), dirtyDescription)
    }
  }

  render() {
    const { intl, media } = this.props
    const active = this.state.hovered || this.state.focused
    const description = this.state.dirtyDescription || (this.state.dirtyDescription !== '' && media.get('description')) || ''

    const descriptionContainerClasses = cx({
      default: 1,
      posAbs: 1,
      right0: 1,
      bottom0: 1,
      left0: 1,
      mt5: 1,
      mb5: 1,
      ml5: 1,
      mr5: 1,
      displayNone: !active,
    })

    return (
      <div
        tabIndex='0'
        className={[_s.default, _s.width50PC, _s.px5, _s.py5].join(' ')}
        onMouseEnter={this.handleMouseEnter}
        onMouseLeave={this.handleMouseLeave}
        onClick={this.handleClick}
        role='button'
      >
        <div className={[_s.default, _s.radiusSmall, _s.overflowHidden, _s.height158PX].join(' ')}>
          <Image
            className={[_s.default, _s.height158PX].join(' ')}
            src={media.get('preview_url')}
          />
          {
            media.get('type') === 'gifv' &&
            <div className={[_s.default, _s.posAbs, _s.z2, _s.radiusSmall, _s.bgBlackOpaque, _s.px5, _s.py5, _s.ml10, _s.mt10, _s.top0, _s.left0].join(' ')}>
              <Text size='extraSmall' color='white' weight='medium'>GIF</Text>
            </div>
          }
          <Button
            backgroundColor='black'
            color='white'
            title={intl.formatMessage(messages.delete)}
            onClick={this.handleUndoClick}
            icon='close'
            iconSize='10px'
            iconClassName={_s.inherit}
            className={[_s.top0, _s.right0, _s.posAbs, _s.mr5, _s.mt5, _s.px10].join(' ')}
          />

          <div className={descriptionContainerClasses}>
            <Input
              small
              hideLabel
              id={`input-${media.get('id')}`}
              title={intl.formatMessage(messages.description)}
              placeholder={intl.formatMessage(messages.description)}
              value={description}
              maxLength={420}
              onFocus={this.handleInputFocus}
              onChange={this.handleInputChange}
              onBlur={this.handleInputBlur}
              onKeyDown={this.handleKeyDown}
            />
          </div>
        </div>
      </div>
    )
  }

}
