/* Copyright (c) 2015-present, salesforce.com, inc. All rights reserved */

/* Licensed under BSD 3-Clause - see LICENSE.txt or git.io/sfdc-license */
// Implements the [Button Group design pattern](https://lightningdesignsystem.com/components/button-groups/) in React.
// Based on SLDS v2.1.1
import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import assign from 'lodash.assign';
import { BUTTON_GROUP } from '../../utilities/constants';
var propTypes = {
  /**
   * Children are expected to be components. If last button triggers a dropdown menu, use Dropdown instead of Button. _Tested with snapshot testing._
   */
  children: PropTypes.node.isRequired,

  /**
   * CSS classes added to `slds-button-group` or `slds-checkbox_button-group` tag
   */
  className: PropTypes.oneOfType([PropTypes.array, PropTypes.object, PropTypes.string]),

  /**
   * **Text labels for internationalization**
   * This object is merged with the default props object on every render.
   * * `error`: Message to display when any of Checkboxes are in an error state. _Tested with snapshot testing._
   * * `label`: This label appears above the button group. _Tested with snapshot testing._
   */
  labels: PropTypes.shape({
    error: PropTypes.string,
    label: PropTypes.string
  }),

  /**
   * Use checkbox variant for "Checkbox Button Group" styling and add Checkbox components as children _Tested with snapshot testing._
   */
  variant: PropTypes.oneOf(['checkbox', 'list'])
};
var defaultProps = {
  labels: {}
};
/**
 * The ButtonGroup component wraps other components (ie. Button, MenuDropdown, PopoverTooltip, Checkboxes, etc).
 */

var ButtonGroup = function ButtonGroup() {
  var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
  // Merge objects of strings with their default object
  var labels = assign({}, defaultProps.labels, props.labels);
  var zeroIndexLength = React.Children.count(props.children) - 1;
  var children = props.children;

  if (zeroIndexLength > 0) {
    children = React.Children.map(props.children, function (child, index) {
      var newChild;

      if (index === zeroIndexLength) {
        newChild = React.cloneElement(child, {
          triggerClassName: 'slds-button_last'
        });
      }

      return newChild || child;
    });
  }

  if (props.variant === 'checkbox') {
    children = React.Children.map(props.children, function (child) {
      return React.cloneElement(child, {
        variant: 'button-group'
      });
    });
    return React.createElement("fieldset", {
      className: classNames('slds-form-element', {
        'slds-has-error': labels.error
      })
    }, React.createElement("legend", {
      className: "slds-form-element__legend slds-form-element__label"
    }, props.labels.label), React.createElement("div", {
      className: "slds-form-element__control"
    }, React.createElement("div", {
      className: classNames('slds-checkbox_button-group', props.className)
    }, children), labels.error ? React.createElement("div", {
      className: "slds-form-element__help"
    }, labels.error) : null));
  }

  if (props.variant === 'list') {
    return React.createElement("ul", {
      className: classNames('slds-button-group-list', props.className)
    }, React.Children.map(props.children, function (child) {
      return React.createElement("li", null, child);
    }));
  } // default


  return React.createElement("div", {
    className: classNames('slds-button-group', props.className),
    role: "group"
  }, children);
};

ButtonGroup.displayName = BUTTON_GROUP;
ButtonGroup.propTypes = propTypes;
ButtonGroup.defaultProps = defaultProps;
export default ButtonGroup;
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