---
// PART 17 — the Big Brother observatory: 35 dated, sourced drift items
// (src/data/observatory.json + per-locale prose), filterable by region group
// and by theme. The filtering is attribute-driven CSS (see <style> below):
// the buttons only set data-obs-region / data-obs-theme on the section root,
// so the no-JS state is simply "everything visible".
import { useT, type Locale } from '../i18n/config'
import { loadDataset, THEMES, type Status } from '../lib/content'
import { mdToHtml } from '../lib/md'
import Ext from './Ext.astro'
import FilterBar from './FilterBar.astro'

interface Props {
  locale: Locale
}

const { locale } = Astro.props
const t = useT(locale)

const items = [...loadDataset('observatory', locale)].sort((a, b) => a.date.localeCompare(b.date))

// The UI groups the 10 raw regions into the 3 chips the dataset guarantees
// are never empty (see tests/unit/content.test.ts): EU, France, World.
const REGION_GROUPS = ['eu', 'fr', 'world'] as const
type RegionGroup = (typeof REGION_GROUPS)[number]
const regionGroup = (region: string): RegionGroup =>
  region === 'eu' ? 'eu' : region === 'fr' ? 'fr' : 'world'

const STATUS_CLASS: Record<Status, string> = {
  en_vigueur: 'border-warn text-warn',
  adopte: 'border-warn text-warn',
  negociation: 'border-lvl2 text-lvl2',
  propose: 'border-info text-info',
  rejete: 'border-ok text-ok',
  suspendu: 'border-ok text-ok',
  revele: 'border-info text-info',
}
---

<section id="observatory">
  <p class="eyebrow">{t('sections2.observatory.eyebrow')}</p>
  <h2>{t('sections2.observatory.title')}</h2>
  <p class="text-dim">{t('sections2.observatory.intro')}</p>
  <FilterBar
    group="region"
    label={t('sections2.observatory.filterRegion')}
    allLabel={t('sections2.observatory.all')}
    options={REGION_GROUPS.map((g) => ({
      value: g,
      label: t(`sections2.observatory.regions.${g}`),
    }))}
  />
  <FilterBar
    group="theme"
    label={t('sections2.observatory.filterTheme')}
    allLabel={t('sections2.observatory.all')}
    options={THEMES.map((th) => ({ value: th, label: t(`sections2.observatory.themes.${th}`) }))}
  />
  <div class="mt-4">
    {
      items.map((ev) => (
        <article
          id={ev.id}
          class="obs-item my-5"
          data-region={regionGroup(ev.region)}
          data-themes={ev.themes.join(' ')}
        >
          <p class="m-0 flex flex-wrap items-baseline gap-x-2 gap-y-1">
            <span class="font-mono text-sm font-bold">{ev.date}</span>
            <span class="rounded-dossier border border-rule px-1.5 py-0.5 font-mono text-xs text-dim">
              {t(`sections2.observatory.regions.${regionGroup(ev.region)}`)}
            </span>
            {ev.themes.map((th) => (
              <span class="rounded-dossier border border-rule px-1.5 py-0.5 font-mono text-xs text-dim">
                {t(`sections2.observatory.themes.${th}`)}
              </span>
            ))}
            <span
              class={`rounded-dossier border px-1.5 py-0.5 font-mono text-xs tracking-wide uppercase ${STATUS_CLASS[ev.status]}`}
            >
              {t(`sections2.observatory.statuses.${ev.status}`)}
            </span>
          </p>
          <h3 class="mt-1 mb-0 text-base">{ev.title}</h3>
          <p class="my-1 text-sm leading-6" set:html={mdToHtml(ev.body)} />
          <p class="mt-1 mb-0 font-mono text-xs">
            <Ext href={ev.src.href} class="text-dim">
              {ev.src.label} →
            </Ext>
          </p>
        </article>
      ))
    }
  </div>
</section>

<style>
  /* Attribute-driven filtering: one rule per chip value, mirroring
     REGION_GROUPS and THEMES above. The buttons only flip the section's
     data attributes — no attribute, nothing hidden (the no-JS state). */
  section[data-obs-region='eu'] .obs-item:not([data-region='eu']),
  section[data-obs-region='fr'] .obs-item:not([data-region='fr']),
  section[data-obs-region='world'] .obs-item:not([data-region='world']),
  section[data-obs-theme='messaging'] .obs-item:not([data-themes~='messaging']),
  section[data-obs-theme='identity'] .obs-item:not([data-themes~='identity']),
  section[data-obs-theme='money'] .obs-item:not([data-themes~='money']),
  section[data-obs-theme='media'] .obs-item:not([data-themes~='media']),
  section[data-obs-theme='aibio'] .obs-item:not([data-themes~='aibio']) {
    display: none;
  }
  /* the printed dossier is always complete, whatever filters are active */
  @media print {
    .obs-item {
      display: block !important;
    }
  }
</style>

<script>
  // Delegated once per page lifecycle (survives ClientRouter swaps): a
  // filter button sets/removes the section's data attribute and mirrors
  // the pressed state on its own group's buttons.
  document.addEventListener('click', (e) => {
    const btn = (e.target as HTMLElement).closest<HTMLButtonElement>('[data-obs-filter]')
    if (!btn) return
    const root = btn.closest<HTMLElement>('#observatory')
    if (!root) return
    const group = btn.dataset.obsFilter ?? ''
    const value = btn.dataset.value ?? ''
    if (value) root.setAttribute(`data-obs-${group}`, value)
    else root.removeAttribute(`data-obs-${group}`)
    for (const other of root.querySelectorAll(`[data-obs-filter="${group}"]`)) {
      other.setAttribute('aria-pressed', String(other === btn))
    }
  })

  export {}
</script>