---
import EditLink from 'virtual:starlight/components/EditLink';
import Pagination from 'virtual:starlight/components/Pagination';
import config from 'virtual:starlight/user-config';
import { Icon } from '@astrojs/starlight/components';
import SocialShare from '../SocialShare.astro';
import { shareCaption } from '../../utils/share-caption';

const route = Astro.locals.starlightRoute;
const caption = shareCaption(
  route.entry?.slug || route.id || '',
  route.entry?.data?.title,
);

/** Date を「令和8年9月22日 11:14」の形にする（ローカル時刻） */
function toJapaneseDateTime(date: Date): string {
  const y = date.getFullYear();
  const m = date.getMonth() + 1;
  const d = date.getDate();
  let era = '昭和';
  let n = y - 1925;
  if (y > 2019 || (y === 2019 && m >= 5)) {
    era = '令和';
    n = y - 2018;
  } else if (y >= 1989) {
    era = '平成';
    n = y - 1988;
  }
  const year = n === 1 ? `${era}元年` : `${era}${n}年`;
  const hh = String(date.getHours()).padStart(2, '0');
  const mm = String(date.getMinutes()).padStart(2, '0');
  return `${year}${m}月${d}日 ${hh}:${mm}`;
}

const lastUpdated = route.lastUpdated;
---

<footer class="sl-flex">
  <SocialShare title={caption} />

  <div class="meta sl-flex">
    <EditLink />
    {
      lastUpdated && (
        <p>
          {Astro.locals.t('page.lastUpdated')}{' '}
          <time datetime={lastUpdated.toISOString()}>{toJapaneseDateTime(lastUpdated)}</time>
        </p>
      )
    }
  </div>
  <Pagination />

  {
    config.credits && (
      <a class="kudos sl-flex" href="https://starlight.astro.build">
        <Icon name={'starlight'} /> {Astro.locals.t('builtWithStarlight.label')}
      </a>
    )
  }
</footer>

<style>
  @layer starlight.core {
    footer {
      flex-direction: column;
      gap: 1.5rem;
    }
    .meta {
      gap: 0.75rem 3rem;
      justify-content: space-between;
      flex-wrap: wrap;
      margin-top: 3rem;
      font-size: var(--sl-text-sm);
      color: var(--sl-color-gray-3);
    }
    .meta > :global(p:only-child) {
      margin-inline-start: auto;
    }

    .kudos {
      align-items: center;
      gap: 0.5em;
      margin: 1.5rem auto;
      font-size: var(--sl-text-xs);
      text-decoration: none;
      color: var(--sl-color-gray-3);
    }
    .kudos:hover {
      color: var(--sl-color-white);
    }
  }

  @layer starlight.components {
    .kudos :global(svg) {
      color: var(--sl-color-orange);
    }
  }
</style>