import React, { Component } from 'react';
import PropTypes from 'prop-types';
import TransitionGroup from 'react-transition-group/TransitionGroup';
import CSSTransition from 'react-transition-group/CSSTransition';
import { getAnimationModule } from '../utils/utils';
import time from '../utils/time';
import Hours from './ClockHours';
import Minutes from './ClockMinutes';

class Clock extends Component {
  static propTypes = {
    display: PropTypes.oneOf(['hours', 'minutes']),
    format: PropTypes.oneOf(['24hr', 'ampm']),
    onChange: PropTypes.func,
    onHandMoved: PropTypes.func,
    theme: PropTypes.shape({
      clock: PropTypes.string,
      clockWrapper: PropTypes.string,
      placeholder: PropTypes.string,
    }),
    time: PropTypes.instanceOf(Date),
  };

  static defaultProps = {
    className: '',
    display: 'hours',
    format: '24hr',
    time: new Date(),
  };

  state = {
    center: { x: null, y: null },
    radius: 0,
  };

  componentDidMount() {
    window.addEventListener('resize', this.handleCalculateShape);
    setTimeout(() => {
      this.handleCalculateShape();
    });
  }

  componentWillUnmount() {
    window.removeEventListener('resize', this.handleCalculateShape);
  }

  handleHourChange = (hours) => {
    if (this.props.time.getHours() !== hours) {
      this.props.onChange(time.setHours(this.props.time, this.adaptHourToFormat(hours)));
    }
  };

  handleMinuteChange = (minutes) => {
    if (this.props.time.getMinutes() !== minutes) {
      this.props.onChange(time.setMinutes(this.props.time, minutes));
    }
  };

  handleCalculateShape = () => {
    const { top, left, width } = this.placeholderNode.getBoundingClientRect();
    this.setState({
      center: {
        x: left + ((width / 2) - window.pageXOffset),
        y: top + ((width / 2) - window.pageXOffset),
      },
      radius: width / 2,
    });
  };

  adaptHourToFormat(hour) {
    if (this.props.format === 'ampm') {
      if (time.getTimeMode(this.props.time) === 'pm') {
        return hour < 12 ? hour + 12 : hour;
      }
      return hour === 12 ? 0 : hour;
    }
    return hour;
  }

  renderHours() {
    return (
      <Hours
        center={this.state.center}
        format={this.props.format}
        onChange={this.handleHourChange}
        radius={this.state.radius}
        selected={this.props.time.getHours()}
        spacing={this.state.radius * 0.18}
        onHandMoved={this.props.onHandMoved}
        theme={this.props.theme}
      />
    );
  }

  renderMinutes() {
    return (
      <Minutes
        center={this.state.center}
        onChange={this.handleMinuteChange}
        radius={this.state.radius}
        selected={this.props.time.getMinutes()}
        spacing={this.state.radius * 0.18}
        onHandMoved={this.props.onHandMoved}
        theme={this.props.theme}
      />
    );
  }

  render() {
    const { theme } = this.props;
    const animation = this.state.display === 'hours' ? 'zoomOut' : 'zoomIn';
    const animationModule = getAnimationModule(animation, theme);
    return (
      <div data-react-toolbox="clock" className={theme.clock}>
        <div
          className={theme.placeholder}
          style={{ height: this.state.radius * 2 }}
          ref={(node) => { this.placeholderNode = node; }}
        >
          <TransitionGroup>
            <CSSTransition classNames={animationModule} timeout={500}>
              <div
                key={this.props.display}
                className={theme.clockWrapper}
                style={{ height: this.state.radius * 2 }}
              >
                {this.props.display === 'hours' ? this.renderHours() : null}
                {this.props.display === 'minutes' ? this.renderMinutes() : null}
              </div>
            </CSSTransition>
          </TransitionGroup>
        </div>
      </div>
    );
  }
}

export default Clock;