function createNode(type, x, y) {
  const template = nodeTemplates[type];
  if (!template) {
    console.warn('No template found for node type:', type);
    return null;
  }

  const id = 'node-' + state.nextNodeId++;
  const node = {
    id,
    type,
    x,
    y,
    fields: {}
  };

  template.fields.forEach(field => {
    node.fields[field.name] = field.default;
  });

  state.nodes.set(id, node);
  renderNode(node);
  saveToHistory();
  updateStatusBar();

  return node;
}

function renderNode(node) {
  const template = nodeTemplates[node.type];
  const typeClass = node.type.toLowerCase().replace(/\s+/g, '-');

  let fieldsHtml = '';
  template.fields.forEach(field => {
    const value = node.fields[field.name] || '';
    if (field.type === 'textarea') {
      fieldsHtml += `
      <div class="node-field">
        <label class="node-field-label">${field.label}</label>
        <textarea class="node-field-input" data-field="${field.name}" rows="2">${value}</textarea>
      </div>
      `;
    } else if (field.type === 'select') {
      const options = field.options.map(opt =>
        `<option value="${opt}" ${opt === value ? 'selected' : ''}>${opt}</option>`
      ).join('');
      fieldsHtml += `
      <div class="node-field">
        <label class="node-field-label">${field.label}</label>
        <select class="node-field-select" data-field="${field.name}">${options}</select>
      </div>
      `;
    } else {
      fieldsHtml += `
      <div class="node-field">
        <label class="node-field-label">${field.label}</label>
        <input type="text" class="node-field-input" data-field="${field.name}" value="${value}">
      </div>
      `;
    }
  });

  let portsHtml = '';
  if (template.hasInput) {
    portsHtml += `<div class="node-port input" data-port="input"></div>`;
  }
  if (template.hasOutput) {
    portsHtml += `<div class="node-port output" data-port="output"></div>`;
  }
  if (template.hasOutputTrue) {
    portsHtml += `<div class="node-port output-true" data-port="true" title="True"></div>`;
  }
  if (template.hasOutputFalse) {
    portsHtml += `<div class="node-port output-false" data-port="false" title="False"></div>`;
  }

  const nodeEl = document.createElement('div');
  nodeEl.className = 'node';
  nodeEl.id = node.id;
  nodeEl.style.left = node.x + 'px';
  nodeEl.style.top = node.y + 'px';
  nodeEl.innerHTML = `
    <div class="node-header ${typeClass}">
      <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="16" height="16">
        ${getNodeIcon(node.type)}
      </svg>
      ${node.type}
    </div>
    <div class="node-body">
      ${fieldsHtml}
    </div>
    ${portsHtml}
  `;

  nodeEl.addEventListener('mousedown', (e) => {
    if (e.target.classList.contains('node-port')) return;
    selectNode(node.id);
    startNodeDrag(e, node);
  });

  nodeEl.querySelectorAll('.node-field-input, .node-field-select').forEach(input => {
    input.addEventListener('change', (e) => {
      node.fields[e.target.dataset.field] = e.target.value;
      saveToHistory();
    });
  });

  nodeEl.querySelectorAll('.node-port').forEach(port => {
    port.addEventListener('mousedown', (e) => {
      e.stopPropagation();
      startConnection(node.id, port.dataset.port);
    });
    port.addEventListener('mouseup', (e) => {
      e.stopPropagation();
      endConnection(node.id, port.dataset.port);
    });
  });

  document.getElementById('canvas-inner').appendChild(nodeEl);
}

function getNodeIcon(type) {
  const icons = {
    'TALK': '<path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z"/>',
    'HEAR': '<path d="M12 1a3 3 0 0 0-3 3v8a3 3 0 0 0 6 0V4a3 3 0 0 0-3-3z"/><path d="M19 10v2a7 7 0 0 1-14 0v-2"/><line x1="12" y1="19" x2="12" y2="23"/>',
    'SET': '<polyline points="4 17 10 11 4 5"/><line x1="12" y1="19" x2="20" y2="19"/>',
    'IF': '<path d="M16 3h5v5"/><path d="M8 3H3v5"/><path d="M12 22v-8.3a4 4 0 0 0-1.172-2.872L3 3"/><path d="m15 9 6-6"/>',
    'FOR': '<polyline points="17 1 21 5 17 9"/><path d="M3 11V9a4 4 0 0 1 4-4h14"/><polyline points="7 23 3 19 7 15"/><path d="M21 13v2a4 4 0 0 1-4 4H3"/>',
    'SWITCH': '<path d="M18 20V10"/><path d="M12 20V4"/><path d="M6 20v-6"/>',
    'CALL': '<path d="M22 16.92v3a2 2 0 0 1-2.18 2 19.79 19.79 0 0 1-8.63-3.07 19.5 19.5 0 0 1-6-6 19.79 19.79 0 0 1-3.07-8.67A2 2 0 0 1 4.11 2h3a2 2 0 0 1 2 1.72c.127.96.362 1.903.7 2.81a2 2 0 0 1-.45 2.11L8.09 9.91a16 16 0 0 0 6 6l1.27-1.27a2 2 0 0 1 2.11-.45c.907.338 1.85.573 2.81.7A2 2 0 0 1 22 16.92z"/>',
    'SEND MAIL': '<path d="M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z"/><polyline points="22,6 12,13 2,6"/>',
    'GET': '<path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/>',
    'POST': '<path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/><polyline points="17 8 12 3 7 8"/><line x1="12" y1="3" x2="12" y2="15"/>',
    'SAVE': '<path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"/><polyline points="17 21 17 13 7 13 7 21"/><polyline points="7 3 7 8 15 8"/>',
    'WAIT': '<circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/>',
    'SET BOT MEMORY': '<path d="M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z"/><line x1="12" y1="2" x2="12" y2="6"/><line x1="12" y1="18" x2="12" y2="22"/>',
    'GET BOT MEMORY': '<path d="M4 4h16c1.1 0 2 .9 2 2v12c0 1.1-.9 2-2 2H4c-1.1 0-2-.9-2-2V6c0-1.1.9-2 2-2z"/><polyline points="7 10 12 15 17 10"/>',
    'SET USER MEMORY': '<path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/>',
    'GET USER MEMORY': '<path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/>'
  };
  return icons[type] || '<circle cx="12" cy="12" r="10"/>';
}

function startNodeDrag(e, node) {
  state.isDragging = true;
  const nodeEl = document.getElementById(node.id);
  const startX = e.clientX;
  const startY = e.clientY;
  const origX = node.x;
  const origY = node.y;

  function onMove(e) {
    const dx = (e.clientX - startX) / state.zoom;
    const dy = (e.clientY - startY) / state.zoom;
    node.x = snapToGrid(origX + dx);
    node.y = snapToGrid(origY + dy);
    nodeEl.style.left = node.x + 'px';
    nodeEl.style.top = node.y + 'px';
    updateConnections();
  }

  function onUp() {
    state.isDragging = false;
    document.removeEventListener('mousemove', onMove);
    document.removeEventListener('mouseup', onUp);
    saveToHistory();
  }

  document.addEventListener('mousemove', onMove);
  document.addEventListener('mouseup', onUp);
}

function selectNode(id) {
  if (state.selectedNode) {
    const prevEl = document.getElementById(state.selectedNode);
    if (prevEl) prevEl.classList.remove('selected');
  }
  state.selectedNode = id;
  const nodeEl = document.getElementById(id);
  if (nodeEl) nodeEl.classList.add('selected');
  updatePropertiesPanel();
}

function deselectAll() {
  if (state.selectedNode) {
    const el = document.getElementById(state.selectedNode);
    if (el) el.classList.remove('selected');
  }
  state.selectedNode = null;
  state.selectedConnection = null;
  updatePropertiesPanel();
}

function deleteSelectedNode() {
  if (!state.selectedNode) return;
  const nodeEl = document.getElementById(state.selectedNode);
  if (nodeEl) nodeEl.remove();

  state.connections = state.connections.filter(
    conn => conn.from !== state.selectedNode && conn.to !== state.selectedNode
  );

  state.nodes.delete(state.selectedNode);
  state.selectedNode = null;
  updateConnections();
  updatePropertiesPanel();
  updateStatusBar();
  saveToHistory();
}

function duplicateNode() {
  if (!state.selectedNode) return;
  const node = state.nodes.get(state.selectedNode);
  if (!node) return;

  const newNode = {...node, fields: {...node.fields}};
  newNode.id = 'node-' + state.nextNodeId++;
  newNode.x += 40;
  newNode.y += 40;
  state.nodes.set(newNode.id, newNode);
  renderNode(newNode);
  selectNode(newNode.id);
  saveToHistory();
  hideContextMenu();
}

function updateStatusBar() {
  document.getElementById('node-count').textContent = state.nodes.size + ' nodes';
  document.getElementById('connection-count').textContent = state.connections.length + ' connections';
}