import _extends from 'babel-runtime/helpers/extends';
import _objectWithoutProperties from 'babel-runtime/helpers/objectWithoutProperties';
// @inheritedComponent Transition

import React from 'react';
import PropTypes from 'prop-types';
import Transition from 'react-transition-group/Transition';
import withTheme from '../styles/withTheme';
import { reflow, getTransitionProps } from './utils';

function getScale(value) {
  return `scale(${value}, ${Math.pow(value, 2)})`;
}

const styles = {
  entering: {
    opacity: 1,
    transform: getScale(1)
  },
  entered: {
    opacity: 1,
    transform: getScale(1)
  }
};

/**
 * The Grow transition is used by the [Popover](/demos/popovers) component.
 * It uses [react-transition-group](https://github.com/reactjs/react-transition-group) internally.
 */
class Grow extends React.Component {
  constructor(...args) {
    var _temp;

    return _temp = super(...args), this.autoTimeout = undefined, this.timer = null, this.handleEnter = node => {
      const { theme, timeout } = this.props;
      reflow(node); // So the animation always start from the start.

      const { duration: transitionDuration, delay } = getTransitionProps(this.props, {
        mode: 'enter'
      });
      let duration = 0;
      if (timeout === 'auto') {
        duration = theme.transitions.getAutoHeightDuration(node.clientHeight);
        this.autoTimeout = duration;
      } else {
        duration = transitionDuration;
      }

      node.style.transition = [theme.transitions.create('opacity', {
        duration,
        delay
      }), theme.transitions.create('transform', {
        duration: duration * 0.666,
        delay
      })].join(',');

      if (this.props.onEnter) {
        this.props.onEnter(node);
      }
    }, this.handleExit = node => {
      const { theme, timeout } = this.props;
      let duration = 0;

      const { duration: transitionDuration, delay } = getTransitionProps(this.props, {
        mode: 'exit'
      });
      if (timeout === 'auto') {
        duration = theme.transitions.getAutoHeightDuration(node.clientHeight);
        this.autoTimeout = duration;
      } else {
        duration = transitionDuration;
      }

      node.style.transition = [theme.transitions.create('opacity', {
        duration,
        delay
      }), theme.transitions.create('transform', {
        duration: duration * 0.666,
        delay: delay || duration * 0.333
      })].join(',');

      node.style.opacity = '0';
      node.style.transform = getScale(0.75);

      if (this.props.onExit) {
        this.props.onExit(node);
      }
    }, this.addEndListener = (_, next) => {
      if (this.props.timeout === 'auto') {
        this.timer = setTimeout(next, this.autoTimeout || 0);
      }
    }, _temp;
  }

  componentWillUnmount() {
    clearTimeout(this.timer);
  }

  render() {
    const _props = this.props,
          { children, onEnter, onExit, style: styleProp, theme, timeout } = _props,
          other = _objectWithoutProperties(_props, ['children', 'onEnter', 'onExit', 'style', 'theme', 'timeout']);

    const style = _extends({}, styleProp, React.isValidElement(children) ? children.props.style : {});

    return React.createElement(
      Transition,
      _extends({
        appear: true,
        onEnter: this.handleEnter,
        onExit: this.handleExit,
        addEndListener: this.addEndListener,
        timeout: timeout === 'auto' ? null : timeout
      }, other),
      (state, childProps) => {
        return React.cloneElement(children, _extends({
          style: _extends({
            opacity: 0,
            transform: getScale(0.75)
          }, styles[state], style)
        }, childProps));
      }
    );
  }
}

Grow.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * A single child content element.
   */
  children: PropTypes.oneOfType([PropTypes.element, PropTypes.func]),
  /**
   * If `true`, show the component; triggers the enter or exit animation.
   */
  in: PropTypes.bool,
  /**
   * @ignore
   */
  onEnter: PropTypes.func,
  /**
   * @ignore
   */
  onEntered: PropTypes.func,
  /**
   * @ignore
   */
  onEntering: PropTypes.func,
  /**
   * @ignore
   */
  onExit: PropTypes.func,
  /**
   * @ignore
   */
  style: PropTypes.object,
  /**
   * @ignore
   */
  theme: PropTypes.object.isRequired,
  /**
   * The duration for the transition, in milliseconds.
   * You may specify a single timeout for all transitions, or individually with an object.
   *
   * Set to 'auto' to automatically calculate transition time based on height.
   */
  timeout: PropTypes.oneOfType([PropTypes.number, PropTypes.shape({ enter: PropTypes.number, exit: PropTypes.number }), PropTypes.oneOf(['auto'])])
} : {};

Grow.defaultProps = {
  timeout: 'auto'
};

export default withTheme()(Grow);