// ============================================================
// MY RESOURCES
// A person's own generated teaching material.
//
// Separate from the Learning Hub on purpose: that is moderator-owned content
// published into categories for everyone, this is private and needs no role
// beyond being signed in. The server enforces that independently — every query
// there filters on the owner — so this only has to be an honest interface to it.
// ============================================================

(function () {
  var inited = false;

  document.addEventListener('tabChanged', function (e) {
    if (!e.detail || e.detail.tab !== 'myresources') return;
    if (!inited) { init(); inited = true; }
    loadLibrary();
  });

  function init() {
    var kind = document.getElementById('mr-kind');
    if (kind) kind.addEventListener('change', syncFormatFields);
    syncFormatFields();

    var generate = document.getElementById('btn-mr-generate');
    if (generate) generate.addEventListener('click', runGenerate);

    var refresh = document.getElementById('btn-mr-refresh');
    if (refresh) refresh.addEventListener('click', loadLibrary);

    // One delegated handler: rows are rebuilt on every refresh, so binding per
    // row would leak listeners and miss anything added later.
    var list = document.getElementById('mr-list');
    if (list) list.addEventListener('click', onRowClick);
  }

  function syncFormatFields() {
    var isArticle = (document.getElementById('mr-kind') || {}).value === 'article';
    var slides = document.getElementById('mr-slide-count');
    var words = document.getElementById('mr-word-wrap');
    if (slides && slides.parentElement) slides.parentElement.hidden = isArticle;
    if (words) words.hidden = !isArticle;
  }

  function status(text, tone) {
    var el = document.getElementById('mr-status');
    if (!el) return;
    el.textContent = text || '';
    el.style.color = tone === 'bad' ? 'var(--red)' : tone === 'good' ? 'var(--green)' : 'var(--g600)';
  }

  function runGenerate() {
    var topic = (document.getElementById('mr-topic') || {}).value || '';
    if (!topic.trim()) { status('Enter a topic first.', 'bad'); return; }

    var btn = document.getElementById('btn-mr-generate');
    if (btn) { btn.disabled = true; btn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Generating...'; }
    status('Searching the library and writing. This takes a moment.');

    var corpusBox = document.getElementById('mr-use-corpus');
    fetch('/api/my-resources/generate', {
      method: 'POST',
      headers: getAuthHeaders(),
      body: JSON.stringify({
        topic: topic.trim(),
        kind: (document.getElementById('mr-kind') || {}).value || 'presentation',
        slideCount: (document.getElementById('mr-slide-count') || {}).value,
        wordCount: (document.getElementById('mr-word-count') || {}).value,
        refinement: (document.getElementById('mr-refinement') || {}).value || '',
        useCorpus: corpusBox && corpusBox.checked === false ? 'false' : 'true'
      })
    })
      .then(function (r) { return r.json(); })
      .then(function (data) {
        if (!data.success) throw new Error(data.error || 'Generation failed');
        // Say what it was written from. Ungrounded material presented as
        // grounded is the failure worth preventing.
        var g = data.grounding || {};
        status(g.used
          ? 'Saved. Written from ' + g.count + ' library excerpt' + (g.count === 1 ? '' : 's') + '.'
          : 'Saved. Not grounded' + (g.reason ? ' — ' + g.reason : '') + '; written from the model alone.',
          g.used ? 'good' : null);
        loadLibrary();
      })
      .catch(function (err) { status(err.message, 'bad'); })
      .finally(function () {
        if (btn) { btn.disabled = false; btn.innerHTML = '<i class="fas fa-wand-magic-sparkles"></i> Generate'; }
      });
  }

  function loadLibrary() {
    var list = document.getElementById('mr-list');
    if (!list) return;
    fetch('/api/my-resources', { headers: getAuthHeaders() })
      .then(function (r) { return r.json(); })
      .then(function (data) {
        list.textContent = '';
        var rows = (data && data.resources) || [];
        if (!rows.length) {
          var empty = document.createElement('p');
          empty.style.cssText = 'margin:0;font-size:13px;color:var(--g400);';
          empty.textContent = 'Nothing yet. Generate something above and it will appear here.';
          list.appendChild(empty);
          return;
        }
        rows.forEach(function (row) { list.appendChild(renderRow(row)); });
      })
      .catch(function () {
        list.textContent = '';
        var failed = document.createElement('p');
        failed.style.cssText = 'margin:0;font-size:13px;color:var(--red);';
        failed.textContent = 'Could not load your resources.';
        list.appendChild(failed);
      });
  }

  // Built as elements rather than innerHTML: a title comes from a model, and
  // this is the one place it reaches the page.
  function renderRow(row) {
    var wrap = document.createElement('div');
    wrap.className = 'saved-enc-item';
    wrap.style.cssText = 'padding:8px 12px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;';

    var body = document.createElement('div');
    body.style.flex = '1';
    body.style.minWidth = '180px';

    var title = document.createElement('div');
    title.style.cssText = 'font-weight:600;font-size:13px;';
    title.textContent = row.title || 'Untitled';

    var meta = document.createElement('div');
    meta.style.cssText = 'font-size:11px;color:var(--g500);';
    meta.textContent = (row.kind === 'article' ? 'Article' : 'Presentation') +
      ' · ' + new Date(row.created_at).toLocaleString() +
      (row.grounded_count ? ' · ' + row.grounded_count + ' library excerpts' : ' · not grounded');

    body.appendChild(title);
    body.appendChild(meta);
    wrap.appendChild(body);

    ['pptx', 'docx', 'pdf'].forEach(function (format) {
      var btn = document.createElement('button');
      btn.className = 'btn-sm btn-ghost';
      btn.type = 'button';
      btn.dataset.download = String(row.id);
      btn.dataset.format = format;
      btn.textContent = format.toUpperCase();
      btn.title = 'Download as ' + format.toUpperCase();
      wrap.appendChild(btn);
    });

    var del = document.createElement('button');
    del.className = 'btn-sm btn-ghost';
    del.type = 'button';
    del.dataset.remove = String(row.id);
    del.style.color = 'var(--red)';
    del.title = 'Delete';
    var icon = document.createElement('i');
    icon.className = 'fas fa-trash';
    del.appendChild(icon);
    wrap.appendChild(del);

    return wrap;
  }

  function onRowClick(event) {
    var download = event.target.closest && event.target.closest('[data-download]');
    if (download) return downloadResource(download.dataset.download, download.dataset.format, download);

    var remove = event.target.closest && event.target.closest('[data-remove]');
    if (remove) {
      showConfirm('Delete this resource? This cannot be undone.', function () {
        fetch('/api/my-resources/' + encodeURIComponent(remove.dataset.remove), {
          method: 'DELETE', headers: getAuthHeaders()
        })
          .then(function (r) { return r.json(); })
          .then(function (d) {
            if (!d.success) throw new Error(d.error || 'Could not delete');
            loadLibrary();
          })
          .catch(function (err) { showToast(err.message, 'error'); });
      }, { danger: true, confirmText: 'Delete' });
    }
  }

  // Fetched rather than linked, because the download needs the auth header and
  // an <a href> cannot carry one.
  function downloadResource(id, format, btn) {
    var original = btn.textContent;
    btn.disabled = true;
    btn.textContent = '...';
    fetch('/api/my-resources/' + encodeURIComponent(id) + '/export?format=' + encodeURIComponent(format), {
      headers: getAuthHeaders()
    })
      .then(function (r) {
        if (!r.ok) return r.json().then(function (d) { throw new Error(d.error || 'Download failed'); });
        var name = 'resource.' + format;
        var disposition = r.headers.get('Content-Disposition') || '';
        var match = disposition.match(/filename="([^"]+)"/);
        if (match) name = match[1];
        return r.blob().then(function (blob) { saveBlob(blob, name); });
      })
      .catch(function (err) { showToast(err.message, 'error'); })
      .finally(function () { btn.disabled = false; btn.textContent = original; });
  }

  function saveBlob(blob, name) {
    var url = URL.createObjectURL(blob);
    var link = document.createElement('a');
    link.href = url;
    link.download = name;
    document.body.appendChild(link);
    link.click();
    link.remove();
    setTimeout(function () { URL.revokeObjectURL(url); }, 1000);
  }
}());