import PropTypes from "prop-types";
import { PureComponent } from "react";

import { FormattedMessage } from "react-intl";

import spring from "react-motion/lib/spring";

import Motion from "../util/optional_motion";

export default class UploadArea extends PureComponent {

  static propTypes = {
    active: PropTypes.bool,
    onClose: PropTypes.func,
  };

  handleKeyUp = (e) => {
    const keyCode = e.keyCode;
    if (this.props.active) {
      switch(keyCode) {
        case 27:
          e.preventDefault();
          e.stopPropagation();
          this.props.onClose();
          break;
      }
    }
  };

  componentDidMount () {
    window.addEventListener("keyup", this.handleKeyUp, false);
  }

  componentWillUnmount () {
    window.removeEventListener("keyup", this.handleKeyUp);
  }

  render () {
    const { active } = this.props;

    return (
      <Motion defaultStyle={{ backgroundOpacity: 0, backgroundScale: 0.95 }} style={{ backgroundOpacity: spring(active ? 1 : 0, { stiffness: 150, damping: 15 }), backgroundScale: spring(active ? 1 : 0.95, { stiffness: 200, damping: 3 }) }}>
        {({ backgroundOpacity, backgroundScale }) => (
          <div className='upload-area' style={{ visibility: active ? "visible" : "hidden", opacity: backgroundOpacity }}>
            <div className='upload-area__drop'>
              <div className='upload-area__background' style={{ transform: `scale(${backgroundScale})` }} />
              <div className='upload-area__content'><FormattedMessage id='upload_area.title' defaultMessage='Drag & drop to upload' /></div>
            </div>
          </div>
        )}
      </Motion>
    );
  }

}