import React, { Component } from 'react';

class Popup extends Component {

    constructor(props) {
        super(props);

        this.state = {
            isOpened: false
        };

        this.setWrapperRef = this.setWrapperRef.bind(this);
        this.handleClickOutside = this.handleClickOutside.bind(this);
        this.toggleButton = this.toggleButton.bind(this);
    }

    componentDidMount() {
        document.addEventListener('mousedown', this.handleClickOutside);
    }

    componentWillUnmount() {
        document.removeEventListener('mousedown', this.handleClickOutside);
    }

    toggleButton() {
        this.setState({isOpened: !this.state.isOpened});
    }

    setWrapperRef(node) {
        this.wrapperRef = node;
    }

    handleClickOutside(event) {
        if (this.wrapperRef && !this.wrapperRef.contains(event.target)) {
            this.setState({isOpened: false});
        }
    }

    render() {
        const isOpened = this.state.isOpened ? '' : 'hide';

        return (
            <div ref={this.setWrapperRef}>
                <button onClick={this.toggleButton}>Toggle modal</button>
                <div className={'modal ' + isOpened}>
                    <h2>Opened class based modal</h2>
                </div>
            </div>
        );
    }

}

export default Popup;