import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import Icon from 'mastodon/components/icon';

export default class IconButton extends React.PureComponent {

  static propTypes = {
    className  : PropTypes.string,
    title      : PropTypes.string.isRequired,
    icon       : PropTypes.string.isRequired,
    onClick    : PropTypes.func,
    onMouseDown: PropTypes.func,
    onKeyDown  : PropTypes.func,
    onKeyPress : PropTypes.func,
    size       : PropTypes.number,
    active     : PropTypes.bool,
    pressed    : PropTypes.bool,
    expanded   : PropTypes.bool,
    style      : PropTypes.object,
    activeStyle: PropTypes.object,
    disabled   : PropTypes.bool,
    inverted   : PropTypes.bool,
    animate    : PropTypes.bool,
    overlay    : PropTypes.bool,
    tabIndex   : PropTypes.string,
  };

  static defaultProps = {
    size    : 18,
    active  : false,
    disabled: false,
    animate : false,
    overlay : false,
    tabIndex: '0',
  };

  state = {
    activate  : false,
    deactivate: false,
  };

  componentWillReceiveProps(nextProps) {
    if (!nextProps.animate) return;

    if (this.props.active && !nextProps.active) {
      this.setState({ activate: false, deactivate: true });
    } else if (!this.props.active && nextProps.active) {
      this.setState({ activate: true, deactivate: false });
    }
  }

  handleClick = (e) => {
    e.preventDefault();

    if (!this.props.disabled) {
      this.props.onClick(e);
    }
  };

  handleKeyPress = (e) => {
    if (this.props.onKeyPress && !this.props.disabled) {
      this.props.onKeyPress(e);
    }
  };

  handleMouseDown = (e) => {
    if (!this.props.disabled && this.props.onMouseDown) {
      this.props.onMouseDown(e);
    }
  };

  handleKeyDown = (e) => {
    if (!this.props.disabled && this.props.onKeyDown) {
      this.props.onKeyDown(e);
    }
  };

  render() {
    const style = {
      // fontSize: `${this.props.size}px`,
      // width: `${this.props.size * 1.28571429}px`,
      // height: `${this.props.size * 1.28571429}px`,
      // lineHeight: `${this.props.size}px`,
      ...this.props.style,
      ...(this.props.active ? this.props.activeStyle : {}),
    };

    const {
      active,
      className,
      disabled,
      expanded,
      icon,
      inverted,
      overlay,
      pressed,
      tabIndex,
      title,
    } = this.props;

    const {
      activate,
      deactivate,
    } = this.state;

    const classes = classNames(className, 'icon-button', {
      active,
      disabled,
      inverted,
      activate,
      deactivate,
      overlayed: overlay,
    });

    return (
      <button
        aria-label={title}
        aria-pressed={pressed}
        aria-expanded={expanded}
        title={title}
        className={classes}
        onClick={this.handleClick}
        onMouseDown={this.handleMouseDown}
        onKeyDown={this.handleKeyDown}
        onKeyPress={this.handleKeyPress}
        style={style}
        tabIndex={tabIndex}
        disabled={disabled}
      >
        <Icon
          id={icon}
          fixedWidth
          aria-hidden='true'
        />
      </button >
    );
  }

}