import React, { Component } from 'react';

import ReactDOM from 'react-dom';

export default class NavbarGroup extends Component {

  state = {

    showDropdown: false

  }

  componentWillMount() {

    document.addEventListener('click', this.handleClickOutside, false);

  }

  componentWillUnmount() {

    document.removeEventListener('click', this.handleClickOutside, false);

  }

  handleClickOutside = (e) => {

    const currentNode = ReactDOM.findDOMNode(this);

    if(currentNode && !currentNode.contains(e.target)) {

      this.hideDropDown();

    }

  }

  toggleShowDropdown = () => {

    this.setState({showDropdown: !this.state.showDropdown});

  }

  hideDropDown = () => {

    this.setState({showDropdown: false});

  }

  render() {

    const {currentGroup, groups, onSelect} = this.props;

    const onClickGroup = (e) => {

      e.preventDefault();

      onSelect(e.target.dataset.groupname);

      this.hideDropDown();

    }

    if (currentGroup) {

      const currentGroupName = currentGroup.name;

      return (

        <li className={`nav-item dropdown ${this.state.showDropdown?'show':''}`}>

          <span className="nav-link dropdown-toggle" id="navbarDropdown" role="button" aria-haspopup="true" aria-expanded={this.state.showDropdown} onClick={this.toggleShowDropdown} onBlur={this.hideDropDown}>

            { currentGroupName }

            &nbsp;<span className="caret"></span>

          </span>

          <div id="group-menu-scroll-down" className={`dropdown-menu dropdown-menu-right shadow py-1 pt-3 mb-5 mt-2 bg-primary border border-primary ${this.state.showDropdown?'show':''}`} aria-labelledby="navbarDropdown">

          { groups && groups.map((group, key) => {

            const groupName = group.name;

            const className = (groupName === currentGroupName)?'active':null;

              return <button key={key} onClick={onClickGroup} className={`dropdown-item btn btn-primary bg-primary text-secondary font-weight-bold ${className}`} data-groupname={groupName}>{ groupName }</button>

            })

          }

          <button type="button "onClick={onClickGroup} key="-1" className="dropdown-item btn btn-primary bg-primary text-center text-secondary create-group" data-groupname="__create_group__">Créer un groupe</button>

          </div>

        </li>

      );

    } else {

      return null;

    }

  }

}