/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
import React from 'react';
import useDocusaurusContext from '@docusaurus/useDocusaurusContext';
import Link from '@docusaurus/Link';
import Translate from '@docusaurus/Translate';
import { useActivePlugin, useDocVersionSuggestions } from '@theme/hooks/useDocs';
import { useDocsPreferredVersion } from '@docusaurus/theme-common';

function UnreleasedVersionLabel({ siteTitle, versionMetadata }) {
  return (
    <Translate
      id="theme.docs.versions.unreleasedVersionLabel"
      description="The label used to tell the user that he's browsing an unreleased doc version"
      values={{
        siteTitle,
        versionLabel: <b>{versionMetadata.label}</b>,
        latestVersionLink: (
          <strong>
            <Link to={"/"}>
              <Translate
                id="theme.docs.versions.latestVersionLinkLabel"
                description="The label used for the latest version suggestion link label">
                docs
              </Translate>
            </Link>
          </strong>
        ),
      }}>
      {
        'This is unreleased documentation for {siteTitle} {versionLabel} version. For up-to-date documentation, see OHIF v2.0  {latestVersionLink}.'
      }
    </Translate>
  );
}

function UnmaintainedVersionLabel({ siteTitle, versionMetadata }) {
  return (
    <Translate
      id="theme.docs.versions.unmaintainedVersionLabel"
      description="The label used to tell the user that he's browsing an unmaintained doc version"
      values={{
        siteTitle,
        versionLabel: <b>{versionMetadata.label}</b>,
      }}>
      {
        'This is documentation for {siteTitle} {versionLabel}, which is no longer actively maintained.'
      }
    </Translate>
  );
}

const BannerLabelComponents = {
  unreleased: UnreleasedVersionLabel,
  unmaintained: UnmaintainedVersionLabel,
};

function BannerLabel(props) {
  const BannerLabelComponent =
    BannerLabelComponents[props.versionMetadata.banner];
  return <BannerLabelComponent {...props} />;
}

function LatestVersionSuggestionLabel({ versionLabel, to, onClick }) {
  return (
    <Translate
      id="theme.docs.versions.latestVersionSuggestionLabel"
      description="The label used to tell the user to check the latest version"
      values={{
        versionLabel,
        latestVersionLink: (
          <b>
            <Link to={to} onClick={onClick}>
              <Translate
                id="theme.docs.versions.latestVersionLinkLabel"
                description="The label used for the latest version suggestion link label">
                latest version
              </Translate>
            </Link>
          </b>
        ),
      }}>
      {
        'For up-to-date documentation, see the {latestVersionLink} ({versionLabel}).'
      }
    </Translate>
  );
}

function DocVersionBannerEnabled({ versionMetadata }) {
  const {
    siteConfig: { title: siteTitle },
  } = useDocusaurusContext();
  const { pluginId } = useActivePlugin({
    failfast: true,
  });

  const getVersionMainDoc = (version) =>
    version.docs.find((doc) => doc.id === version.mainDocId);

  const { savePreferredVersionName } = useDocsPreferredVersion(pluginId);
  const {
    latestDocSuggestion,
    latestVersionSuggestion,
  } = useDocVersionSuggestions(pluginId); // try to link to same doc in latest version (not always possible)
  // fallback to main doc of latest version

  const latestVersionSuggestedDoc =
    latestDocSuggestion ?? getVersionMainDoc(latestVersionSuggestion);
  return (
    <div className="alert alert--warning margin-bottom--md" role="alert">
      <div>
        <BannerLabel siteTitle={siteTitle} versionMetadata={versionMetadata} />
      </div>
      {/* <div className="margin-top--md">
        <LatestVersionSuggestionLabel
          versionLabel={latestVersionSuggestion.label}
          to={latestVersionSuggestedDoc.path}
          onClick={() => savePreferredVersionName(latestVersionSuggestion.name)}
        />
      </div> */}
    </div>
  );
}

function DocVersionBanner({ versionMetadata }) {
  if (versionMetadata.banner === 'none') {
    return <></>;
  } else {
    return <DocVersionBannerEnabled versionMetadata={versionMetadata} />;
  }
}

export default DocVersionBanner;