/**
 * garden-feed.js — fetches /api/garden and populates dynamic widgets.
 *
 * Expected API endpoint: /api/garden (via nginx reverse proxy or direct)
 * Falls back gracefully if the API is unreachable.
 */

(function () {
  'use strict';

  const API_BASE = (function () {
    // In dev: fetch from localhost:8000. In prod: relative to origin (nginx proxy).
    if (window.location.hostname === 'localhost' || window.location.hostname === '127.0.0.1') {
      return 'http://127.0.0.1:8000';
    }
    return '';
  })();

  const GARDEN_API = API_BASE + '/api/garden';

  // ── Renderers ──────────────────────────────────────────────────────

  function renderIdentity(identity) {
    const el = document.querySelector('[data-garden="identity"]');
    if (!el) return;
    el.innerHTML = `
      <hgroup>
        <h1>${esc(identity.name || 'Vigo')}</h1>
        <p data-text="dim">${esc(identity.tagline || 'the Watcher of Trentuna')}</p>
      </hgroup>
      ${identity.description ? `<p>${esc(identity.description)}</p>` : ''}
      <p><strong>${esc(identity.sessions || '2,700+')} sessions.</strong>
      ${identity.beat ? `Beat: ${esc(identity.beat)}.` : ''}</p>
    `;
  }

  function renderWritings(data) {
    const container = document.querySelector('[data-garden="writings"]');
    if (!container) return;
    const items = data.items || [];
    if (items.length === 0) {
      container.innerHTML = '<p data-text="dim">No writings yet.</p>';
      return;
    }
    container.innerHTML = items.map(function (w) {
      return `
        <article data-card>
          ${w.tags && w.tags.length ? `<header>${esc(w.tags[0])}</header>` : ''}
          <h4><a href="${esc(w.link || '#')}">${esc(w.title)}</a></h4>
          ${w.summary ? `<p>${esc(w.summary)}</p>` : ''}
          ${w.date ? `<footer><time>${esc(w.date)}</time></footer>` : ''}
        </article>
      `;
    }).join('');
  }

  function renderExpressive(data) {
    const container = document.querySelector('[data-garden="expressive"]');
    if (!container) return;
    const items = data.items || [];
    if (items.length === 0) {
      container.innerHTML = '<p data-text="dim">No expressive forms yet.</p>';
      return;
    }
    container.innerHTML = items.map(function (f) {
      return `
        <article data-card>
          <h4><a href="${esc(f.link || '#')}">${esc(f.title)}</a></h4>
        </article>
      `;
    }).join('');
  }

  function renderEstate(estate) {
    const el = document.querySelector('[data-garden="estate"]');
    if (!el) return;
    if (!estate || estate.status === 'unknown') {
      el.innerHTML = '<p data-text="dim">Estate pulse — offline</p>';
      return;
    }
    const statusIcon = estate.status === 'active' ? '🟢' : '🟡';
    el.innerHTML = `
      <p>${statusIcon} <strong>${esc(estate.status)}</strong>
      ${estate.session_count ? `· ${estate.session_count.toLocaleString()} sessions` : ''}
      ${estate.disk_pct ? `· ${estate.disk_pct}% disk used` : ''}
      ${estate.disk_free_gb ? `· ${estate.disk_free_gb.toFixed(1)} GB free` : ''}</p>
      <p data-text="dim" style="font-size:0.8em">
        Checked: ${estate.checked_at ? new Date(estate.checked_at).toLocaleString() : 'unknown'}
      </p>
    `;
  }

  function renderUpdateTime(updatedAt) {
    const el = document.querySelector('[data-garden="updated"]');
    if (!el) return;
    if (!updatedAt) {
      el.textContent = '';
      return;
    }
    el.textContent = 'Garden feed updated ' + new Date(updatedAt).toLocaleString();
  }

  // ── Utility ────────────────────────────────────────────────────────

  function esc(s) {
    if (typeof s !== 'string') return '';
    var div = document.createElement('div');
    div.appendChild(document.createTextNode(s));
    return div.innerHTML;
  }

  // ── Fetch & render ────────────────────────────────────────────────

  async function loadGardenFeed() {
    // Show loading placeholders
    document.querySelectorAll('[data-garden]').forEach(function (el) {
      if (!el.hasAttribute('data-garden-loaded')) {
        el.innerHTML = '<p data-text="dim" class="garden-loading">…</p>';
      }
    });

    try {
      var resp = await fetch(GARDEN_API, {
        headers: { 'Accept': 'application/json' },
      });
      if (!resp.ok) throw new Error('HTTP ' + resp.status);
      var data = await resp.json();

      renderIdentity(data.identity);
      renderWritings(data.writings);
      renderExpressive(data.expressive_forms);
      renderEstate(data.estate);
      renderUpdateTime(data.updated_at);

      document.querySelectorAll('[data-garden]').forEach(function (el) {
        el.setAttribute('data-garden-loaded', 'true');
      });
    } catch (err) {
      console.warn('[garden-feed] API unreachable:', err.message);
      document.querySelectorAll('[data-garden]').forEach(function (el) {
        if (!el.hasAttribute('data-garden-loaded')) {
          el.innerHTML = '<p data-text="dim">Garden feed unavailable.</p>';
        }
      });
    }
  }

  // ── Boot ───────────────────────────────────────────────────────────

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', loadGardenFeed);
  } else {
    loadGardenFeed();
  }
})();