// ============================================================
// DOCUMENTS.JS — S3 document upload & management UI
// ============================================================

(function() {

  function loadDocuments() {
    var container = document.getElementById('documents-list');
    if (!container) return;
    fetch('/api/documents', { headers: getAuthHeaders() })
      .then(function(r) { return r.json(); })
      .then(function(data) {
        if (!data.s3_configured) {
          container.innerHTML = '<p style="color:var(--g400);font-size:13px;">S3 storage not configured. Set S3_BUCKET in server environment.</p>';
          var uploadArea = document.getElementById('doc-upload-area');
          if (uploadArea) uploadArea.style.display = 'none';
          return;
        }
        var docs = data.documents || [];
        if (docs.length === 0) {
          container.innerHTML = '<p style="color:var(--g400);font-size:13px;">No documents uploaded yet.</p>';
          return;
        }
        container.innerHTML = docs.map(function(doc) {
          var sizeStr = doc.size_bytes < 1024 ? doc.size_bytes + ' B' :
            doc.size_bytes < 1048576 ? Math.round(doc.size_bytes / 1024) + ' KB' :
            (doc.size_bytes / 1048576).toFixed(1) + ' MB';
          var date = doc.created_at ? new Date(doc.created_at).toLocaleDateString() : '';
          return '<div class="saved-enc-item" style="padding:8px 12px;">' +
            '<div style="flex:1;min-width:0;">' +
              '<div style="font-weight:600;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">' +
                '<i class="fas fa-file" style="margin-right:4px;color:var(--g400);"></i>' + esc(doc.filename) +
              '</div>' +
              '<div style="font-size:11px;color:var(--g500);">' + sizeStr + ' &middot; ' + date +
                (doc.description ? ' &middot; ' + esc(doc.description) : '') +
              '</div>' +
            '</div>' +
            '<button class="btn-sm btn-primary doc-download-btn" data-id="' + doc.id + '"><i class="fas fa-download"></i></button>' +
            '<button class="btn-sm btn-ghost doc-delete-btn" data-id="' + doc.id + '" style="color:var(--red);"><i class="fas fa-trash"></i></button>' +
          '</div>';
        }).join('');

        container.querySelectorAll('.doc-download-btn').forEach(function(btn) {
          btn.addEventListener('click', function() { downloadDocument(btn.dataset.id); });
        });
        container.querySelectorAll('.doc-delete-btn').forEach(function(btn) {
          btn.addEventListener('click', function() { deleteDocument(btn.dataset.id); });
        });
      })
      .catch(function() {
        container.innerHTML = '<p style="color:var(--g400);font-size:13px;">Failed to load documents.</p>';
      });
  }

  function uploadDocument() {
    var fileInput = document.getElementById('doc-file-input');
    var descInput = document.getElementById('doc-description');
    if (!fileInput || !fileInput.files[0]) { showToast('Select a file first', 'error'); return; }

    var formData = new FormData();
    formData.append('file', fileInput.files[0]);
    formData.append('description', descInput ? descInput.value : '');

    showLoading('Uploading document...');
    fetch('/api/documents/upload', {
      method: 'POST',
      headers: window.IS_NATIVE_APP
        ? { 'Authorization': 'Bearer ' + (window.AUTH_TOKEN || (window.SecureStorage && window.SecureStorage.getSync('ped_scribe_token')) || '') }
        : {},  // web: httpOnly cookie sent automatically via credentials:'same-origin' default
      credentials: 'same-origin',
      body: formData
    })
    .then(function(r) { return r.json(); })
    .then(function(data) {
      hideLoading();
      if (data.success) {
        showToast('Document uploaded: ' + data.filename, 'success');
        fileInput.value = '';
        if (descInput) descInput.value = '';
        loadDocuments();
      } else {
        showToast(data.error || 'Upload failed', 'error');
      }
    })
    .catch(function(err) { hideLoading(); showToast('Upload failed: ' + err.message, 'error'); });
  }

  function downloadDocument(id) {
    fetch('/api/documents/' + id + '/download', { headers: getAuthHeaders() })
      .then(function(r) { return r.json(); })
      .then(function(data) {
        if (data.success && data.url) {
          window.open(data.url, '_blank');
        } else {
          showToast(data.error || 'Download failed', 'error');
        }
      })
      .catch(function() { showToast('Download failed', 'error'); });
  }

  function deleteDocument(id) {
    showConfirm('Delete this document permanently?', function() {
      fetch('/api/documents/' + id, { method: 'DELETE', headers: getAuthHeaders() })
        .then(function(r) { return r.json(); })
        .then(function(data) {
          if (data.success) { showToast('Document deleted', 'info'); loadDocuments(); }
          else showToast(data.error || 'Delete failed', 'error');
        })
        .catch(function() { showToast('Delete failed', 'error'); });
    }, { danger: true, confirmText: 'Delete' });
  }

  function esc(str) {
    if (!str) return '';
    return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  }

  // Expose for settings tab load
  window.loadDocuments = loadDocuments;

  // Wire upload button
  document.addEventListener('click', function(e) {
    if (e.target.closest('#btn-doc-upload')) uploadDocument();
  });

  console.log('Documents module loaded');
})();