// Copyright (c) 2019 The Jaeger Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import * as React from 'react';
import { UIDropdown, UIMenu, UIMenuItem } from '..';
import NewWindowIcon from './NewWindowIcon';

type Link = {
  text: string;
  url: string;
};

type ExternalLinksProps = {
  links: Link[];
  className?: string;
};

const LinkValue = (props: { href: string; title?: string; children?: React.ReactNode; className?: string }) => (
  <a href={props.href} title={props.title} target="_blank" rel="noopener noreferrer" className={props.className}>
    {props.children} <NewWindowIcon />
  </a>
);

// export for testing
export const linkValueList = (links: Link[]) => (
  <UIMenu>
    {links.map(({ text, url }, index) => (
      // `index` is necessary in the key because url can repeat
      <UIMenuItem key={`${url}-${index}`}>
        <LinkValue href={url}>{text}</LinkValue>
      </UIMenuItem>
    ))}
  </UIMenu>
);

export default function ExternalLinks(props: ExternalLinksProps) {
  const { links } = props;
  if (links.length === 1) {
    return <LinkValue href={links[0].url} title={links[0].text} className={props.className} />;
  }
  return (
    <UIDropdown overlay={linkValueList(links)} placement="bottomRight" trigger={['click']}>
      <a className={props.className}>
        <NewWindowIcon isLarge />
      </a>
    </UIDropdown>
  );
}
