// ============================================================
// MEMORIES.JS — User template/memory storage + settings UI
// ============================================================

(function() {

  var _memories = [];
  var _editingId = null;

  var CATEGORY_LABELS = {
    physical_exam: 'Physical Exam',
    ros: 'Review of Systems',
    encounter_format: 'Encounter Format',
    family_history: 'Family History',
    assessment_plan: 'Assessment & Plan',
    template_soap: 'SOAP Template',
    template_hpi: 'HPI Template',
    template_wellvisit: 'Well Visit Template',
    template_sickvisit: 'Sick Visit Template',
    custom: 'Custom'
  };

  // Correction categories (hidden from manual editing, managed by correction tracker)
  var CORRECTION_LABELS = {
    correction_soap: 'SOAP Correction',
    correction_hpi: 'HPI Correction',
    correction_encounter: 'Encounter Correction',
    correction_wellvisit: 'Well Visit Correction',
    correction_sickvisit: 'Sick Visit Correction'
  };

  // ── Load memories ────────────────────────────────────────────────────────

  function loadMemories() {
    fetch('/api/memories', { headers: getAuthHeaders() })
      .then(function(r) { return r.json(); })
      .then(function(data) {
        if (!data.success) return;
        _memories = data.memories || [];
        renderMemoryList();
      })
      .catch(function(err) { console.error('[Memories] Load failed:', err); });
  }

  function renderMemoryList() {
    var container = document.getElementById('mem-list');
    if (!container) return;
    // Separate templates from corrections
    var templates = _memories.filter(function(m) { return !m.category.startsWith('correction_'); });
    var corrections = _memories.filter(function(m) { return m.category.startsWith('correction_'); });
    // Render corrections list
    renderCorrectionsList(corrections);
    if (templates.length === 0) {
      container.innerHTML = '<p style="color:var(--g400);font-size:13px;">No templates saved yet. Add one above.</p>';
      return;
    }
    container.innerHTML = templates.map(function(m) {
      var catLabel = CATEGORY_LABELS[m.category] || m.category;
      var preview = (m.content || '').substring(0, 100).replace(/\n/g, ' ');
      return '<div class="mem-item" data-id="' + m.id + '">' +
        '<div class="mem-item-info">' +
          '<div style="display:flex;align-items:center;gap:6px;margin-bottom:2px;">' +
            '<span class="mem-item-name">' + esc(m.name) + '</span>' +
            '<span class="mem-item-cat">' + esc(catLabel) + '</span>' +
          '</div>' +
          '<div class="mem-item-preview">' + esc(preview) + (m.content && m.content.length > 100 ? '...' : '') + '</div>' +
        '</div>' +
        '<button class="btn-sm btn-ghost mem-edit-btn" data-id="' + m.id + '" title="Edit"><i class="fas fa-pen"></i></button>' +
        '<button class="btn-sm btn-ghost mem-delete-btn" data-id="' + m.id + '" style="color:var(--red);" title="Delete"><i class="fas fa-trash"></i></button>' +
      '</div>';
    }).join('');

    container.querySelectorAll('.mem-edit-btn').forEach(function(btn) {
      btn.addEventListener('click', function() { editMemory(parseInt(btn.dataset.id)); });
    });
    container.querySelectorAll('.mem-delete-btn').forEach(function(btn) {
      btn.addEventListener('click', function() { deleteMemory(parseInt(btn.dataset.id)); });
    });
  }

  function renderCorrectionsList(corrections) {
    var container = document.getElementById('corrections-list');
    if (!container) return;
    if (corrections.length === 0) {
      container.innerHTML = '<p style="color:var(--g400);font-size:13px;">No corrections yet. Edit AI-generated notes and save to start learning.</p>';
      return;
    }
    container.innerHTML = corrections.map(function(m) {
      var catLabel = CORRECTION_LABELS[m.category] || m.category;
      var preview = (m.name || '').replace(/\n/g, ' ');
      // Parse original and corrected from content
      var parts = parseCorrection(m.content || '');
      var date = m.created_at ? new Date(m.created_at).toLocaleDateString() : '';
      return '<div class="mem-item" style="flex-direction:column;align-items:stretch;cursor:pointer;" data-id="' + m.id + '">' +
        '<div style="display:flex;align-items:center;gap:8px;" class="correction-header" data-toggle="' + m.id + '">' +
          '<i class="fas fa-chevron-right correction-arrow" id="arrow-' + m.id + '" style="font-size:10px;color:var(--g400);transition:transform 0.2s;"></i>' +
          '<span class="mem-item-cat">' + esc(catLabel) + '</span>' +
          '<span style="flex:1;font-size:12px;color:var(--g600);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">' + esc(preview) + '</span>' +
          '<span style="font-size:11px;color:var(--g400);flex-shrink:0;">' + date + '</span>' +
          '<button class="btn-sm btn-ghost correction-delete-btn" data-id="' + m.id + '" style="color:var(--red);flex-shrink:0;" title="Delete"><i class="fas fa-trash"></i></button>' +
        '</div>' +
        '<div class="correction-detail hidden" id="detail-' + m.id + '" style="margin-top:8px;padding:8px 12px;background:var(--g50);border-radius:6px;font-size:12px;line-height:1.6;">' +
          '<div style="margin-bottom:8px;">' +
            '<div style="font-weight:600;color:var(--red);font-size:11px;text-transform:uppercase;margin-bottom:2px;">Original (AI generated):</div>' +
            '<div style="color:var(--g600);white-space:pre-wrap;font-family:inherit;">' + esc(parts.original) + '</div>' +
          '</div>' +
          '<div>' +
            '<div style="font-weight:600;color:var(--green);font-size:11px;text-transform:uppercase;margin-bottom:2px;">Corrected to:</div>' +
            '<div style="color:var(--g800);white-space:pre-wrap;font-family:inherit;">' + esc(parts.corrected) + '</div>' +
          '</div>' +
        '</div>' +
      '</div>';
    }).join('');

    // Toggle expand/collapse
    container.querySelectorAll('.correction-header').forEach(function(header) {
      header.addEventListener('click', function(e) {
        if (e.target.closest('.correction-delete-btn')) return;
        var id = header.dataset.toggle;
        var detail = document.getElementById('detail-' + id);
        var arrow = document.getElementById('arrow-' + id);
        if (detail) {
          detail.classList.toggle('hidden');
          if (arrow) arrow.style.transform = detail.classList.contains('hidden') ? '' : 'rotate(90deg)';
        }
      });
    });

    container.querySelectorAll('.correction-delete-btn').forEach(function(btn) {
      btn.addEventListener('click', function(e) {
        e.stopPropagation();
        deleteMemory(parseInt(btn.dataset.id));
      });
    });
  }

  function parseCorrection(content) {
    var original = '';
    var corrected = '';
    var idx = content.indexOf('\nCORRECTED TO: ');
    if (idx !== -1) {
      original = content.substring(0, idx).replace(/^ORIGINAL:\s*/i, '');
      corrected = content.substring(idx + '\nCORRECTED TO: '.length);
    } else {
      original = content;
    }
    return { original: original.trim(), corrected: corrected.trim() };
  }

  // ── Save memory ──────────────────────────────────────────────────────────

  function saveMemory() {
    var name     = document.getElementById('mem-name').value.trim();
    var category = document.getElementById('mem-category').value;
    var content  = document.getElementById('mem-content').value.trim();

    if (!name) { showToast('Enter a template name', 'error'); return; }
    if (!content) { showToast('Enter template content', 'error'); return; }

    var url    = _editingId ? '/api/memories/' + _editingId : '/api/memories';
    var method = _editingId ? 'PUT' : 'POST';

    fetch(url, {
      method: method,
      headers: getAuthHeaders(),
      body: JSON.stringify({ name: name, category: category, content: content })
    })
    .then(function(r) { return r.json(); })
    .then(function(data) {
      if (data.success) {
        showToast(_editingId ? 'Template updated' : 'Template saved', 'success');
        cancelEdit();
        loadMemories();
      } else {
        showToast(data.error || 'Save failed', 'error');
      }
    })
    .catch(function() { showToast('Save failed', 'error'); });
  }

  function editMemory(id) {
    var mem = _memories.find(function(m) { return m.id === id; });
    if (!mem) return;
    _editingId = id;
    document.getElementById('mem-name').value     = mem.name;
    document.getElementById('mem-category').value = mem.category;
    document.getElementById('mem-content').value  = mem.content;

    var btn = document.getElementById('btn-mem-save');
    if (btn) btn.innerHTML = '<i class="fas fa-check"></i> Update Template';

    // Add cancel button if not present
    if (!document.getElementById('btn-mem-cancel')) {
      var cancel = document.createElement('button');
      cancel.id = 'btn-mem-cancel';
      cancel.className = 'btn-sm btn-ghost';
      cancel.innerHTML = '<i class="fas fa-times"></i> Cancel';
      cancel.style.marginLeft = '6px';
      cancel.addEventListener('click', cancelEdit);
      if (btn && btn.parentNode) btn.parentNode.appendChild(cancel);
    }
    document.getElementById('mem-name').focus();
  }

  function cancelEdit() {
    _editingId = null;
    document.getElementById('mem-name').value    = '';
    document.getElementById('mem-content').value = '';
    var btn = document.getElementById('btn-mem-save');
    if (btn) btn.innerHTML = '<i class="fas fa-plus"></i> Add Template';
    var cancel = document.getElementById('btn-mem-cancel');
    if (cancel) cancel.remove();
  }

  function deleteMemory(id) {
    var mem = _memories.find(function(m) { return m.id === id; });
    if (!confirm('Delete template "' + (mem ? mem.name : '') + '"?')) return;
    fetch('/api/memories/' + id, { method: 'DELETE', headers: getAuthHeaders() })
      .then(function(r) { return r.json(); })
      .then(function(data) {
        if (data.success) { showToast('Template deleted', 'info'); loadMemories(); }
        else showToast(data.error || 'Delete failed', 'error');
      })
      .catch(function() { showToast('Delete failed', 'error'); });
  }

  // ── Event wiring ─────────────────────────────────────────────────────────

  // Expose so auth.js can call on settings tab navigation
  window.loadMemories = loadMemories;

  document.addEventListener('click', function(e) {
    // Settings button or settings tab — load memories
    if (e.target.closest('#btn-settings') || (e.target.closest('.tab-btn') && e.target.closest('.tab-btn[data-tab="settings"]'))) {
      setTimeout(loadMemories, 100);
    }
    // Save memory button
    if (e.target.closest('#btn-mem-save')) {
      saveMemory();
    }
  });

  // ── Expose context for AI generation ────────────────────────────────────

  // Call this before any AI generation to get user memory context.
  // Always fetches from the API so it works even if _memories cache is empty.
  window.getUserMemoryContext = function() {
    return fetch('/api/memories/context', { headers: getAuthHeaders() })
      .then(function(r) { return r.json(); })
      .then(function(data) { return data.success ? (data.context || '') : ''; })
      .catch(function() { return ''; });
  };

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

  console.log('✅ Memories module loaded');

})();