import { Components, registerComponent, Utils, getSetting } from 'meteor/vulcan:core';
import { withMutation } from 'meteor/vulcan:core';
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { FormattedMessage, intlShape } from 'meteor/vulcan:i18n';
import FRC from 'formsy-react-components';

const Input = FRC.Input;

class EmbedURL extends Component {
  constructor(props) {
    super(props);

    this.state = {
      loading: false,
      value: props.value || '',
    };
  }

  // clean the media property of the document if it exists: this field is handled server-side in an async callback
  componentDidMount() {
    try {
      if (this.props.document && !_.isEmpty(this.props.document.media)) {
        this.context.updateCurrentValues({ media: {} });
      }
    } catch (error) {
      console.error('Error cleaning "media" property', error); // eslint-disable-line
    }
  }

  editThumbnail = () => {
    const newThumbnailUrl = prompt(
      this.context.intl.formatMessage({ id: 'posts.enter_thumbnail_url' }),
      this.context.getDocument().thumbnailUrl
    );
    if (newThumbnailUrl) {
      this.context.updateCurrentValues({ thumbnailUrl: newThumbnailUrl });
    }
  };

  clearThumbnail = () => {
    if (confirm(this.context.intl.formatMessage({ id: 'posts.clear_thumbnail?' }))) {
      this.context.updateCurrentValues({ thumbnailUrl: null });
    }
  };

  // called whenever the URL input field loses focus
  handleBlur = async () => {
    try {
      // value from formsy input ref
      const url = this.input.getValue();

      // start the mutation only if the input has a value
      if (url.length) {
        // notify the user that something happens
        this.setState({ loading: true });

        // the URL has changed, get new title, body, thumbnail & media for this url
        const result = await this.props.getEmbedData({ url });

        // uncomment for debug
        // console.log('Embedly Data', result);

        // extract the relevant data, for easier consumption
        const { data: { getEmbedData: { title, description, thumbnailUrl } } } = result;
        const body = description;

        // update the form
        if (title && !this.context.getDocument().title) {
          this.context.updateCurrentValues({ title });
        }
        if (body && !this.context.getDocument().body) {
          this.context.updateCurrentValues({ body });
        }
        if (thumbnailUrl && !this.context.getDocument().thumbnailUrl) {
          this.context.updateCurrentValues({ thumbnailUrl });
        }

        // embedly component is done
        this.setState({ loading: false });

        // remove errors & keep the current values
        // TODO: why??
        // this.context.clearForm({clearErrors: true});
      }
    } catch (error) {
      console.error(error); // eslint-disable-line
      const errorMessage = error.message.includes('401')
        ? Utils.encodeIntlError({ id: 'app.embedly_not_authorized' })
        : error.message;

      // embedly component is done
      this.setState({ loading: false });

      // something bad happened
      this.context.throwError({ id: 'embedurl.error_fetching_data', data: { name: this.props.path, message: errorMessage } });
    }
  };

  getDimensions = () => {
    const width = getSetting('thumbnailWidth', 80);
    const height = getSetting('thumbnailHeight', 60);
    const ratio = width / height;
    return {
      width,
      height,
      ratio,
    };
  };

  renderThumbnail() {
    return (
      <div className="embedly-thumbnail">
        <img className="embedly-thumbnail-image" src={this.context.getDocument().thumbnailUrl} />
        <div className="embedly-thumbnail-actions">
          <a className="thumbnail-edit" onClick={this.editThumbnail}>
            <Components.Icon name="edit" /> <FormattedMessage id="posts.enter_thumbnail_url" />
          </a>
          <a className="thumbnail-clear" onClick={this.clearThumbnail}>
            <Components.Icon name="delete" /> <FormattedMessage id="posts.clear_thumbnail" />
          </a>
        </div>
      </div>
    );
  }

  renderNoThumbnail() {
    return (
      <div className="embedly-thumbnail">
        <div
          style={{ width: `${Math.round(60 * this.getDimensions().ratio)}px`, height: '60px' }}
          onClick={this.editThumbnail}
          className="embedly-thumbnail-placeholder"
        >
          <Components.Icon name="image" />
          <FormattedMessage id="posts.enter_thumbnail_url" />
        </div>
      </div>
    );
  }

  render() {
    const wrapperStyle = {
      position: 'relative',
    };

    const loadingStyle = {
      position: 'absolute',
      pointerEvents: 'none',
      top: '15px',
      right: '15px',
    };

    loadingStyle.display = this.state.loading ? 'block' : 'none';

    // see https://facebook.github.io/react/warnings/unknown-prop.html
    const { document, control, getEmbedData, refFunction, inputProperties } = this.props; // eslint-disable-line

    return (
      <div className="form-group row embedly-form-group" style={wrapperStyle}>
        <label className="control-label col-sm-3">{this.props.label}</label>
        <div className="col-sm-9 embedly-form-control">
          <div className="embedly-url-field">
            <Input
              {...inputProperties}
              onBlur={this.handleBlur}
              type="url"
              ref={ref => (this.input = ref)}
              layout="elementOnly"
            />
            <div className="embedly-url-field-loading" style={loadingStyle}>
              <Components.Loading />
            </div>
          </div>

          {this.context.getDocument().thumbnailUrl ? this.renderThumbnail() : this.renderNoThumbnail()}
        </div>
      </div>
    );
  }
}

EmbedURL.propTypes = {
  name: PropTypes.string,
  value: PropTypes.any,
  label: PropTypes.string,
};

EmbedURL.contextTypes = {
  updateCurrentValues: PropTypes.func,
  addToDeletedValues: PropTypes.func,
  throwError: PropTypes.func,
  clearForm: PropTypes.func,
  getDocument: PropTypes.func,
  intl: intlShape,
};

const options = {
  name: 'getEmbedData',
  args: { url: 'String' },
};

export default withMutation(options)(EmbedURL);

registerComponent('EmbedURL', EmbedURL, [withMutation, options]);