var currentStep = 1;
var TOTAL_STEPS = 5;
var wizardProtocol = 'rest'; // 'rest' | 'graphql' | 'grpc'
var wizardMode   = 'create'; // 'create' | 'edit'
var wizardEditId = null;
var wizardWorkspaceId = null;
var wizardCurrentOperation = null;
var wizardCurrentVersion = null;
var wizardProtoUpload = null;
var wizardDescriptorSetUpload = null;
var wizardTestResponsePreview = null;
var grpcDescriptorServices = [];

/* ── Dynamic step loading ── */
function _stepFile(n) {
  return (n === 3) ? 'step3-' + wizardProtocol + '.html' : 'step' + n + '.html';
}

function loadStep(n, callback) {
  var panelId = (n === 3) ? step3PanelId() : 'step-panel-' + n;
  if (document.getElementById(panelId)) { if (callback) callback(); return; }
  fetch(_stepFile(n))
    .then(function(r) { return r.text(); })
    .then(function(html) {
      var c = document.getElementById('step-panel-container');
      if (c) c.insertAdjacentHTML('beforeend', html);
      if (callback) callback();
    })
    .catch(function() { if (callback) callback(); });
}

/* Step 3 panel id by protocol */
function step3PanelId() {
  if (wizardProtocol === 'graphql') return 'step-panel-3-graphql';
  if (wizardProtocol === 'grpc')    return 'step-panel-3-grpc';
  return 'step-panel-3-rest';
}

/* Sidebar step-3 label by protocol */
var STEP3_LABELS = {
  rest:    'Request config',
  graphql: 'GQL operation',
  grpc:    'RPC method',
};

var CHECK_SVG = '<svg width="10" height="10"><use href="' + (window.APP_BASE||'') + 'icons/general/check.svg#icon"/></svg>';
var ARROW_SVG = '<svg width="13" height="13"><use href="' + (window.APP_BASE||'') + 'icons/general/arrow-right.svg#icon"/></svg>';
var BACK_SVG  = '<svg width="13" height="13"><use href="' + (window.APP_BASE||'') + 'icons/general/arrow-left.svg#icon"/></svg>';

function goToStep(n) {
  if (n < 1 || n > TOTAL_STEPS) return;
  loadStep(n, function() { _doGoToStep(n); });
}

function _doGoToStep(n) {
  // 1. hide all panes, show target (step 4 is protocol-specific)
  document.querySelectorAll('.step-pane').forEach(function(p) { p.style.display = 'none'; });
  var panelId = (n === 3) ? step3PanelId() : 'step-panel-' + n;
  var pane = document.getElementById(panelId);
  if (pane) pane.style.display = '';

  // 2. update sidebar step items
  document.querySelectorAll('.step-item').forEach(function(item, i) {
    var num = i + 1;
    item.classList.remove('active', 'done', 'pending');
    var ind = item.querySelector('.step-indicator');
    var statusEl = item.querySelector('.step-status-text');
    if (num < n) {
      item.classList.add('done');
      if (ind) ind.innerHTML = CHECK_SVG;
      if (statusEl) statusEl.textContent = 'Completed';
    } else if (num === n) {
      item.classList.add('active');
      if (ind) ind.textContent = num;
      if (statusEl) statusEl.textContent = 'In progress';
    } else {
      item.classList.add('pending');
      if (ind) ind.textContent = num;
      if (statusEl) statusEl.textContent = 'Not started';
    }
  });

  // 3. update progress bar
  var pct = Math.round((n / TOTAL_STEPS) * 100);
  var fill = document.querySelector('.progress-bar-fill');
  if (fill) fill.style.width = pct + '%';
  var pctEl = document.querySelector('.progress-pct');
  if (pctEl) pctEl.textContent = pct + '%';

  // 4. update step counter
  var counter = document.querySelector('.step-counter');
  if (counter) counter.innerHTML = 'Step <strong>' + n + '</strong> of ' + TOTAL_STEPS;

  // 5. back button
  var backBtn = document.querySelector('.btn-back');
  if (backBtn) {
    if (n === 1) {
      backBtn.disabled = true;
      backBtn.style.opacity = '0.35';
      backBtn.style.cursor = 'not-allowed';
    } else {
      backBtn.disabled = false;
      backBtn.style.opacity = '';
      backBtn.style.cursor = '';
    }
  }

  // 6. continue button
  var contBtn = document.querySelector('.btn-continue');
  if (contBtn) {
    if (n === TOTAL_STEPS) {
      var finalLabel = wizardMode === 'edit' ? 'Save changes' : 'Create operation';
      contBtn.innerHTML = finalLabel + ' ' + ARROW_SVG;
      contBtn.style.cssText = 'background:#3fb950;border-color:#2ea043;box-shadow:0 1px 4px rgba(63,185,80,0.4);';
    } else {
      contBtn.innerHTML = 'Continue ' + ARROW_SVG;
      contBtn.style.cssText = '';
    }
  }

  currentStep = n;
  window.scrollTo({ top: 0, behavior: 'smooth' });
}

function loadWizardPanels(steps) {
  return steps.reduce(function(chain, step) {
    return chain.then(function() {
      return new Promise(function(resolve) {
        loadStep(step, resolve);
      });
    });
  }, Promise.resolve());
}

function bindProtocolCards() {
  document.querySelectorAll('.protocol-card').forEach(function(card) {
    card.addEventListener('click', function() {
      document.querySelectorAll('.protocol-card').forEach(function(item) {
        item.classList.remove('selected');
        item.setAttribute('aria-checked', 'false');
      });
      card.classList.add('selected');
      card.setAttribute('aria-checked', 'true');

      var proto = card.dataset.protocol
        || (card.classList.contains('rest')
          ? 'rest'
          : card.classList.contains('graphql')
            ? 'graphql'
            : card.classList.contains('grpc')
              ? 'grpc'
              : 'rest');

      wizardProtocol = proto;
      var s3name = document.getElementById('sidebar-step-3-name');
      if (s3name) s3name.textContent = STEP3_LABELS[proto] || 'Protocol config';

      if (proto === 'graphql') {
        var pathInput = document.getElementById('endpoint-path');
        if (pathInput && pathInput.value === '/v1/leads') pathInput.value = '/graphql';
      }
    });
    card.addEventListener('keydown', function(event) {
      if (event.key === 'Enter' || event.key === ' ') {
        event.preventDefault();
        card.click();
      }
    });
  });
}

document.addEventListener('DOMContentLoaded', async function() {
  document.querySelector('.btn-continue').addEventListener('click', function() {
    if (currentStep < TOTAL_STEPS) {
      goToStep(currentStep + 1);
    } else {
      saveOperation();
    }
  });

  document.querySelector('.btn-back').addEventListener('click', function() {
    if (!this.disabled && currentStep > 1) goToStep(currentStep - 1);
  });

  document.querySelectorAll('.step-item').forEach(function(item, i) {
    item.addEventListener('click', function() { goToStep(i + 1); });
  });

  var backToCatalog = document.getElementById('back-to-catalog');
  if (backToCatalog) {
    backToCatalog.addEventListener('click', function() {
      window.location.href = (window.APP_BASE || '') + 'index.html';
    });
  }

  var closeBtn = document.querySelector('.progress-close');
  if (closeBtn) {
    closeBtn.addEventListener('click', function() {
      window.location.href = (window.APP_BASE || '') + 'index.html';
    });
  }

  var saveDraftBtn = document.querySelector('.btn-save-draft');
  if (saveDraftBtn) {
    saveDraftBtn.addEventListener('click', function() {
      saveOperation(true);
    });
  }

  await (window.whenWorkspacesReady ? window.whenWorkspacesReady() : Promise.resolve());
  var workspace = window.getCurrentWorkspace ? window.getCurrentWorkspace() : null;
  wizardWorkspaceId = workspace ? workspace.id : null;

  await loadWizardPanels([1, 2, 3, 4, 5]);
  bindProtocolCards();
  bindWizardLiveActions();

  var params = new URLSearchParams(window.location.search);
  if (params.get('mode') === 'edit' && params.get('operationId')) {
    wizardMode = 'edit';
    wizardEditId = params.get('operationId');
    document.title = 'Crank — Edit Operation';
    await loadOperationForEdit();
  }

  updateWizardProtocolVisibility();
  _doGoToStep(1);
});


/* ── HTTP method picker (Step 4 REST) ── */

var METHOD_CALLOUTS = {
  GET:    null,
  DELETE: null,
  POST:   { icon: 'info', text: '<strong>POST selected — body encoding required.</strong> In step 4 you will define the JSON schema for the body payload. Crank will automatically serialize MCP tool arguments into the format you specify.' },
  PUT:    { icon: 'info', text: '<strong>PUT selected — full-resource replacement.</strong> The request body must contain a complete resource representation. Define the body schema in step 4.' },
  PATCH:  { icon: 'info', text: '<strong>PATCH selected — partial update.</strong> Only include the fields you want to modify in the body schema defined in step 4.' },
};

function selectMethod(btn) {
  document.querySelectorAll('.method-card').forEach(function(b) { b.classList.remove('active'); });
  btn.classList.add('active');
  var method = btn.dataset.method;
  var callout = document.getElementById('method-callout-rest');
  if (!callout) return;
  var info = METHOD_CALLOUTS[method];
  if (info) {
    callout.innerHTML =
      '<svg width="15" height="15" style="flex-shrink:0;color:var(--accent)"><use href="' + (window.APP_BASE||'') + 'icons/general/info-circle.svg#icon"/></svg>' +
      '<span>' + info.text + '</span>';
    callout.style.display = 'flex';
  } else {
    callout.style.display = 'none';
  }
}

/* ── GraphQL operation type picker (Step 4 GraphQL) ── */

function selectGqlType(btn) {
  document.querySelectorAll('.gql-type-card').forEach(function(b) { b.classList.remove('active'); });
  btn.classList.add('active');
  // Update query editor placeholder if it's still the default
  var editor = document.getElementById('gql-query-editor');
  if (!editor) return;
  var type = btn.dataset.gqlType;
  var defaults = {
    query: 'query GetContact($id: ID!) {\n  contact(id: $id) {\n    id\n    firstName\n    lastName\n    email\n    company {\n      id\n      name\n    }\n    createdAt\n  }\n}',
    mutation: 'mutation CreateContact(\n  $firstName: String!\n  $lastName: String!\n  $email: String!\n  $company: String\n) {\n  createContact(input: {\n    firstName: $firstName\n    lastName: $lastName\n    email: $email\n    company: $company\n  }) {\n    id\n    firstName\n    lastName\n    createdAt\n  }\n}'
  };
  if (defaults[type]) editor.value = defaults[type];
}

/* ── Upstream selector (Step 3) ── */

var upstreams = [
  { id: 'acme-api',      name: 'acme-api',         url: 'https://api.acme.com',            auth: 'bearer',  authLabel: 'Bearer token' },
  { id: 'stripe',        name: 'stripe-payments',   url: 'https://api.stripe.com',          auth: 'apikey',  authLabel: 'API key' },
  { id: 'internal-crm',  name: 'internal-crm',      url: 'https://crm.internal.acme.io',    auth: 'none',    authLabel: 'No auth' },
  { id: 'sendgrid',      name: 'sendgrid-mail',     url: 'https://api.sendgrid.com',        auth: 'apikey',  authLabel: 'API key' },
  { id: 'twilio',        name: 'twilio-sms',        url: 'https://api.twilio.com',          auth: 'bearer',  authLabel: 'Bearer token' },
];

var selectedUpstreamId = null;
var dropdownOpen = false;

function renderDropdownList(filter) {
  var list = document.getElementById('upstream-dropdown-list');
  if (!list) return;
  var q = (filter || '').toLowerCase();
  var filtered = upstreams.filter(function(u) {
    return !q || u.name.toLowerCase().includes(q) || u.url.toLowerCase().includes(q);
  });

  if (filtered.length === 0) {
    list.innerHTML = '<div class="upstream-dropdown-empty">No upstreams match "' + escapeHtml(filter) + '"</div>';
    return;
  }

  var tmpl = document.getElementById('tmpl-upstream-item');
  list.innerHTML = '';
  filtered.forEach(function(u) {
    var sel = u.id === selectedUpstreamId;
    var node = tmpl.content.cloneNode(true);
    var item = node.querySelector('.upstream-dropdown-item');
    if (sel) item.classList.add('selected');
    item.addEventListener('click', function() { pickUpstream(u.id); });
    node.querySelector('.upstream-dropdown-item-name').textContent = u.name;
    node.querySelector('.upstream-dropdown-item-url').textContent  = u.url;
    var badge = node.querySelector('.upstream-auth-badge');
    badge.textContent  = u.authLabel;
    badge.className    = 'upstream-auth-badge auth-' + u.auth;
    list.appendChild(node);
  });
}

function openUpstreamDropdown() {
  var combobox = document.getElementById('upstream-combobox');
  var dropdown = document.getElementById('upstream-dropdown');
  var search = document.getElementById('upstream-search');
  if (!combobox || !dropdown) return;
  combobox.classList.add('open');
  dropdown.style.display = '';
  dropdownOpen = true;
  renderDropdownList('');
  if (search) { search.value = ''; search.focus(); }

  // Close new-upstream form if open
  var form = document.getElementById('upstream-new-form');
  if (form) form.style.display = 'none';
}

function closeUpstreamDropdown() {
  var combobox = document.getElementById('upstream-combobox');
  var dropdown = document.getElementById('upstream-dropdown');
  if (!combobox || !dropdown) return;
  combobox.classList.remove('open');
  dropdown.style.display = 'none';
  dropdownOpen = false;
}

function toggleUpstreamDropdown(e) {
  e.stopPropagation();
  if (dropdownOpen) { closeUpstreamDropdown(); } else { openUpstreamDropdown(); }
}

function filterUpstreams(val) {
  renderDropdownList(val);
}

function pickUpstream(id) {
  selectedUpstreamId = id;
  closeUpstreamDropdown();

  var u = upstreams.find(function(x) { return x.id === id; });
  if (!u) return;

  // Update combobox trigger value
  var val = document.getElementById('upstream-combobox-value');
  if (val) {
    var trigTmpl = document.getElementById('tmpl-upstream-trigger-value');
    if (trigTmpl) {
      val.innerHTML = '';
      var trigNode = trigTmpl.content.cloneNode(true);
      trigNode.querySelector('.upstream-trigger-name').textContent = u.name;
      trigNode.querySelector('.upstream-trigger-url').textContent  = u.url;
      val.appendChild(trigNode);
    } else {
      val.innerHTML =
        '<div class="upstream-trigger-name">' + escapeHtml(u.name) + '</div>' +
        '<div class="upstream-trigger-url">' + escapeHtml(u.url) + '</div>';
    }
  }

  // Show preview strip
  var preview = document.getElementById('upstream-preview');
  var pName = document.getElementById('upstream-preview-name');
  var pUrl = document.getElementById('upstream-preview-url');
  var pBadge = document.getElementById('upstream-preview-badge');
  if (preview) {
    pName.textContent = u.name;
    pUrl.textContent = u.url;
    pBadge.textContent = u.authLabel;
    pBadge.className = 'upstream-auth-badge auth-' + u.auth;
    preview.style.display = 'flex';
  }

  // Hide new-upstream form and reset trigger
  var form = document.getElementById('upstream-new-form');
  if (form) form.style.display = 'none';
  var trigger = document.getElementById('upstream-new-trigger');
  if (trigger) trigger.classList.remove('active');

  // Update reflection panel upstream info strip
  var reflectName = document.getElementById('grpc-reflect-upstream-name');
  var reflectUrl  = document.getElementById('grpc-reflect-upstream-url');
  if (reflectName) reflectName.textContent = u.name;
  if (reflectUrl)  reflectUrl.textContent  = u.url;
}

function startNewUpstream() {
  closeUpstreamDropdown();
  var trigger = document.getElementById('upstream-new-trigger');
  var form = document.getElementById('upstream-new-form');
  var isOpen = form && form.style.display !== 'none';

  if (isOpen) {
    // toggle off — restore previous state
    if (form) form.style.display = 'none';
    if (trigger) trigger.classList.remove('active');
    return;
  }

  // Clear combobox trigger & hide preview
  var val = document.getElementById('upstream-combobox-value');
  if (val) val.innerHTML = '<span class="upstream-combobox-placeholder">Select an upstream…</span>';
  var preview = document.getElementById('upstream-preview');
  if (preview) preview.style.display = 'none';
  selectedUpstreamId = null;

  // Mark trigger active and show form
  if (trigger) trigger.classList.add('active');
  if (form) {
    form.style.display = '';
    var first = form.querySelector('input');
    if (first) setTimeout(function() { first.focus(); }, 50);
  }
}

function saveNewUpstream(e) {
  e.stopPropagation();
  var nameEl = document.getElementById('new-upstream-name');
  var urlEl = document.getElementById('new-upstream-url');
  var name = nameEl ? nameEl.value.trim() : '';
  var url = urlEl ? urlEl.value.trim() : '';
  if (!name) { if (nameEl) nameEl.focus(); return; }
  if (!url) { if (urlEl) urlEl.focus(); return; }

  // Add to list
  var newId = 'custom-' + Date.now();
  upstreams.push({ id: newId, name: name, url: url, auth: 'bearer', authLabel: 'Bearer token' });

  // Reset form
  if (nameEl) nameEl.value = '';
  if (urlEl) urlEl.value = '';
  var form = document.getElementById('upstream-new-form');
  if (form) form.style.display = 'none';

  // Select the new upstream
  pickUpstream(newId);
}

function cancelNewUpstream(e) {
  e.stopPropagation();
  var form = document.getElementById('upstream-new-form');
  if (form) form.style.display = 'none';
  var trigger = document.getElementById('upstream-new-trigger');
  if (trigger) trigger.classList.remove('active');
}

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

// Close dropdown on outside click
document.addEventListener('click', function() {
  if (dropdownOpen) closeUpstreamDropdown();
});


/* ══════════════════════════════════════════════
   gRPC — source selector
══════════════════════════════════════════════ */

var grpcSource = 'proto'; // 'proto' | 'reflection' | 'manual'

function selectGrpcSource(source) {
  grpcSource = source;
  document.querySelectorAll('.grpc-source-btn').forEach(function(btn) {
    btn.classList.toggle('active', btn.dataset.source === source);
  });
  document.getElementById('grpc-src-proto').style.display      = source === 'proto'      ? '' : 'none';
  document.getElementById('grpc-src-reflection').style.display = source === 'reflection' ? '' : 'none';
  document.getElementById('grpc-src-manual').style.display     = source === 'manual'     ? '' : 'none';
  // hide shared detail when switching sources
  var detail = document.getElementById('grpc-method-detail');
  if (detail) detail.style.display = 'none';
  selectedRpcMethod = null;
}

/* ══════════════════════════════════════════════
   gRPC — Proto file parser & UI
══════════════════════════════════════════════ */

var protoParsed = null;       // { package, services, messages, streamingCount }
var selectedRpcMethod = null; // { service, method, request, response }

/* Extract top-level blocks with proper brace matching */
function extractBlocks(text, keyword) {
  var blocks = [];
  var re = new RegExp(keyword + '\\s+(\\w+)\\s*\\{', 'g');
  var match;
  while ((match = re.exec(text)) !== null) {
    var name = match[1];
    var start = match.index + match[0].length;
    var depth = 1;
    var i = start;
    while (i < text.length && depth > 0) {
      if (text[i] === '{') depth++;
      else if (text[i] === '}') depth--;
      i++;
    }
    blocks.push({ name: name, body: text.slice(start, i - 1), start: match.index });
  }
  return blocks;
}

/* Strip single-line and block comments */
function stripProtoComments(text) {
  // block comments
  text = text.replace(/\/\*[\s\S]*?\*\//g, '');
  // line comments
  text = text.replace(/\/\/[^\n]*/g, '');
  return text;
}

/* Parse a proto text → { package, services, messages, streamingCount } */
function parseProto(text) {
  text = stripProtoComments(text);

  var pkg = '';
  var pkgMatch = text.match(/\bpackage\s+([\w.]+)\s*;/);
  if (pkgMatch) pkg = pkgMatch[1];

  // messages: map name → [{ repeated, type, name }]
  var messages = {};
  extractBlocks(text, 'message').forEach(function(blk) {
    var fields = [];
    var fieldRe = /\b(repeated\s+)?([\w.]+)\s+(\w+)\s*=\s*\d+/g;
    var fm;
    while ((fm = fieldRe.exec(blk.body)) !== null) {
      // skip reserved / map keywords
      if (['option','reserved','extensions','oneof'].indexOf(fm[2]) !== -1) continue;
      fields.push({ repeated: !!fm[1], type: fm[2], name: fm[3] });
    }
    messages[blk.name] = fields;
  });

  var streamingCount = 0;
  var services = [];

  extractBlocks(text, 'service').forEach(function(svc) {
    var methods = [];
    // rpc Name ( [stream] ReqType ) returns ( [stream] ResType ) { }
    var rpcRe = /\brpc\s+(\w+)\s*\(\s*(stream\s+)?([\w.]+)\s*\)\s*returns\s*\(\s*(stream\s+)?([\w.]+)\s*\)/g;
    var rm;
    while ((rm = rpcRe.exec(svc.body)) !== null) {
      var streamIn  = !!rm[2];
      var streamOut = !!rm[4];
      if (streamIn || streamOut) {
        streamingCount++;
      } else {
        // Strip package prefix from type names for display
        var reqType = rm[3].split('.').pop();
        var resType = rm[5].split('.').pop();
        methods.push({ name: rm[1], request: reqType, response: resType });
      }
    }
    if (methods.length > 0) {
      services.push({ name: svc.name, methods: methods });
    }
  });

  return { package: pkg, services: services, messages: messages, streamingCount: streamingCount };
}

/* Generic renderer: fills a service/method list into given element IDs */
function renderServiceResults(parsed, ids) {
  protoParsed = parsed;
  selectedRpcMethod = null;

  var notice = document.getElementById(ids.notice);
  var countEl = document.getElementById(ids.count);
  if (notice) {
    notice.style.display = parsed.streamingCount > 0 ? '' : 'none';
    if (countEl && parsed.streamingCount > 0) countEl.textContent = parsed.streamingCount;
  }

  var totalMethods = parsed.services.reduce(function(n, s) { return n + s.methods.length; }, 0);
  var summaryEl = document.getElementById(ids.summary);
  if (summaryEl) {
    summaryEl.textContent =
      parsed.services.length + ' service' + (parsed.services.length !== 1 ? 's' : '') +
      ' · ' + totalMethods + ' unary method' + (totalMethods !== 1 ? 's' : '') + ' found';
  }

  var listEl = document.getElementById(ids.list);
  if (!listEl) return;

  listEl.innerHTML = '';
  if (parsed.services.length === 0) {
    var emptyDiv = document.createElement('div');
    emptyDiv.className = 'proto-empty';
    emptyDiv.textContent = 'No unary RPC methods found.';
    listEl.appendChild(emptyDiv);
  } else {
    var svcTmpl    = document.getElementById('tmpl-proto-service-group');
    var methodTmpl = document.getElementById('tmpl-proto-method-card');
    parsed.services.forEach(function(svc) {
      var svcNode = svcTmpl.content.cloneNode(true);
      svcNode.querySelector('.proto-service-name').textContent = svc.name;
      var grid = svcNode.querySelector('.proto-method-grid');
      svc.methods.forEach(function(m) {
        var mNode = methodTmpl.content.cloneNode(true);
        var btn = mNode.querySelector('.proto-method-card');
        btn.dataset.service = svc.name;
        btn.dataset.method  = m.name;
        btn.dataset.req     = m.request;
        btn.dataset.res     = m.response;
        mNode.querySelector('.proto-method-name').textContent = m.name;
        mNode.querySelector('.proto-req-type').textContent    = m.request;
        mNode.querySelector('.proto-res-type').textContent    = m.response;
        grid.appendChild(mNode);
      });
      listEl.appendChild(svcNode);
    });
  }

  document.getElementById(ids.view).style.display = '';
  document.getElementById('grpc-method-detail').style.display = 'none';
}

function renderParsedProto(parsed) {
  renderServiceResults(parsed, {
    notice: 'proto-streaming-notice', count: 'proto-streaming-count',
    summary: 'proto-services-summary', list: 'proto-services-list', view: 'proto-parsed-view',
  });
}

function renderReflectionResult(parsed) {
  renderServiceResults(parsed, {
    notice: 'reflect-streaming-notice', count: 'reflect-streaming-count',
    summary: 'reflect-services-summary', list: 'reflect-services-list', view: 'reflect-parsed-view',
  });
}

/* Select a method card (shared between proto + reflection) */
function selectRpcMethod(btn) {
  document.querySelectorAll('.proto-method-card').forEach(function(b) { b.classList.remove('active'); });
  btn.classList.add('active');

  var svcName    = btn.dataset.service;
  var methodName = btn.dataset.method;
  var reqType    = btn.dataset.req;
  var resType    = btn.dataset.res;

  selectedRpcMethod = { service: svcName, method: methodName, request: reqType, response: resType };

  var pkg = protoParsed && protoParsed.package ? protoParsed.package + '.' : '';
  var grpcPath = '/' + pkg + svcName + '/' + methodName;

  var pathEl = document.getElementById('grpc-path-value');
  if (pathEl) pathEl.textContent = grpcPath;

  var sub = document.getElementById('grpc-method-subtitle');
  if (sub) sub.textContent = 'rpc ' + methodName + ' (' + reqType + ') returns (' + resType + ')';

  var reqTypeEl = document.getElementById('grpc-req-type');
  var resTypeEl = document.getElementById('grpc-res-type');
  if (reqTypeEl) reqTypeEl.textContent = reqType;
  if (resTypeEl) resTypeEl.textContent = resType;

  var sigGrid = document.getElementById('grpc-detail-sig');
  if (sigGrid) sigGrid.style.display = '';

  renderFieldList('grpc-req-fields', reqType);
  renderFieldList('grpc-res-fields', resType);

  document.getElementById('grpc-method-detail').style.display = '';
}

function renderFieldList(elId, typeName) {
  var el = document.getElementById(elId);
  if (!el) return;
  var fields = protoParsed && protoParsed.messages[typeName];
  el.innerHTML = '';
  if (!fields || fields.length === 0) {
    var emptyEl = document.createElement('div');
    emptyEl.className = 'proto-field-empty';
    emptyEl.innerHTML = 'Fields not resolved.<br><span style="color:var(--text-muted);font-size:11px;">Import or external types are not expanded client-side.</span>';
    el.appendChild(emptyEl);
    return;
  }
  var fieldTmpl = document.getElementById('tmpl-proto-field-row');
  fields.forEach(function(f) {
    var node = fieldTmpl.content.cloneNode(true);
    node.querySelector('.proto-field-name').textContent = f.name;
    node.querySelector('.proto-field-type').textContent = (f.repeated ? 'repeated ' : '') + f.type;
    el.appendChild(node);
  });
}

/* File handling */
function handleProtoFile(event) {
  var file = event.target.files[0];
  if (!file) return;
  var reader = new FileReader();
  reader.onload = function(e) {
    wizardProtoUpload = { fileName: file.name, content: e.target.result };
    showProtoFileInfo(file.name, file.size);
    var parsed = parseProto(e.target.result);
    renderParsedProto(parsed);
  };
  reader.readAsText(file);
}

function handleProtoDrop(event) {
  event.preventDefault();
  var dropzone = document.getElementById('proto-dropzone');
  if (dropzone) dropzone.classList.remove('drag-over');
  var file = event.dataTransfer.files[0];
  if (!file || !file.name.endsWith('.proto')) return;
  var reader = new FileReader();
  reader.onload = function(e) {
    wizardProtoUpload = { fileName: file.name, content: e.target.result };
    showProtoFileInfo(file.name, file.size);
    renderParsedProto(parseProto(e.target.result));
  };
  reader.readAsText(file);
}

function showProtoFileInfo(name, size) {
  var dropzone = document.getElementById('proto-dropzone');
  var info = document.getElementById('proto-file-info');
  var nameEl = document.getElementById('proto-file-name');
  var sizeEl = document.getElementById('proto-file-size');
  if (dropzone) dropzone.style.display = 'none';
  if (info) info.style.display = '';
  if (nameEl) nameEl.textContent = name;
  if (sizeEl) sizeEl.textContent = (size / 1024).toFixed(1) + ' KB';
  // hide paste area
  document.getElementById('proto-paste-area').style.display = 'none';
  document.getElementById('proto-paste-btn').textContent = 'Paste content';
}

function resetProto() {
  var dropzone = document.getElementById('proto-dropzone');
  var info = document.getElementById('proto-file-info');
  var parsedView = document.getElementById('proto-parsed-view');
  if (dropzone) dropzone.style.display = '';
  if (info) info.style.display = 'none';
  if (parsedView) parsedView.style.display = 'none';
  var fileInput = document.getElementById('proto-file-input');
  if (fileInput) fileInput.value = '';
  protoParsed = null;
  selectedRpcMethod = null;
  wizardProtoUpload = null;
}

function toggleProtoPaste() {
  var area = document.getElementById('proto-paste-area');
  var btn = document.getElementById('proto-paste-btn');
  if (!area) return;
  var open = area.style.display !== 'none';
  area.style.display = open ? 'none' : '';
  if (btn) btn.textContent = open ? 'Paste content' : 'Cancel paste';
  if (!open) {
    var ta = document.getElementById('proto-paste-input');
    if (ta) setTimeout(function() { ta.focus(); }, 50);
  }
}

function cancelProtoPaste() {
  var area = document.getElementById('proto-paste-area');
  var btn = document.getElementById('proto-paste-btn');
  if (area) area.style.display = 'none';
  if (btn) btn.textContent = 'Paste content';
}

function parseProtoPasted() {
  var ta = document.getElementById('proto-paste-input');
  if (!ta || !ta.value.trim()) return;
  var parsed = parseProto(ta.value);
  wizardProtoUpload = { fileName: 'pasted.proto', content: ta.value };
  document.getElementById('proto-paste-area').style.display = 'none';
  var dropzone = document.getElementById('proto-dropzone');
  if (dropzone) dropzone.style.display = 'none';
  var info = document.getElementById('proto-file-info');
  var nameEl = document.getElementById('proto-file-name');
  var sizeEl = document.getElementById('proto-file-size');
  if (info) info.style.display = '';
  if (nameEl) nameEl.textContent = 'pasted.proto';
  if (sizeEl) sizeEl.textContent = (ta.value.length / 1024).toFixed(1) + ' KB';
  renderParsedProto(parsed);
}


/* ══════════════════════════════════════════════
   gRPC — Server reflection (simulated)
══════════════════════════════════════════════ */

var REFLECTION_MOCK = {
  package: 'acme.v1',
  streamingCount: 2,
  services: [
    { name: 'ContactService', methods: [
      { name: 'GetContact',    request: 'GetContactRequest',    response: 'Contact' },
      { name: 'CreateContact', request: 'CreateContactRequest', response: 'Contact' },
      { name: 'UpdateContact', request: 'UpdateContactRequest', response: 'Contact' },
      { name: 'DeleteContact', request: 'DeleteContactRequest', response: 'DeleteContactResponse' },
    ]},
    { name: 'CompanyService', methods: [
      { name: 'GetCompany',    request: 'GetCompanyRequest',    response: 'Company' },
      { name: 'ListCompanies', request: 'ListCompaniesRequest', response: 'ListCompaniesResponse' },
    ]},
  ],
  messages: {
    'GetContactRequest':     [{ type: 'string',  name: 'id' }],
    'Contact':               [{ type: 'string',  name: 'id' }, { type: 'string', name: 'first_name' }, { type: 'string', name: 'last_name' }, { type: 'string', name: 'email' }, { type: 'string', name: 'company_id' }, { type: 'string', name: 'created_at' }],
    'CreateContactRequest':  [{ type: 'string',  name: 'first_name' }, { type: 'string', name: 'last_name' }, { type: 'string', name: 'email' }, { type: 'string', name: 'company_id' }],
    'UpdateContactRequest':  [{ type: 'string',  name: 'id' }, { type: 'string', name: 'first_name' }, { type: 'string', name: 'last_name' }, { type: 'string', name: 'email' }],
    'DeleteContactRequest':  [{ type: 'string',  name: 'id' }],
    'DeleteContactResponse': [{ type: 'bool',    name: 'success' }],
    'GetCompanyRequest':     [{ type: 'string',  name: 'id' }],
    'Company':               [{ type: 'string',  name: 'id' }, { type: 'string', name: 'name' }, { type: 'string', name: 'domain' }, { type: 'int32', name: 'employee_count' }],
    'ListCompaniesRequest':  [{ type: 'int32',   name: 'page' }, { type: 'int32', name: 'page_size' }, { type: 'string', name: 'query' }],
    'ListCompaniesResponse': [{ type: 'Company', name: 'companies', repeated: true }, { type: 'int32', name: 'total' }],
  },
};

function startReflection() {
  goToStep(5);
  showWizardLiveStatus(
    'gRPC discovery moved to live descriptor flow',
    'Server reflection is not wired in this deployment. Save the draft, then use the descriptor-set tools in Step 5 to upload a real descriptor set and discover unary methods from the backend.'
  );
}


/* ══════════════════════════════════════════════
   gRPC — Manual entry
══════════════════════════════════════════════ */

function grpcManualRouteInput(val) {
  var detail = document.getElementById('grpc-method-detail');
  var sigGrid = document.getElementById('grpc-detail-sig');
  if (!val || !val.startsWith('/') || val.indexOf('/', 1) === -1) {
    if (detail) detail.style.display = 'none';
    return;
  }
  // Parse service + method from route: /[pkg.]Service/Method
  var parts = val.replace(/^\//, '').split('/');
  var servicePart = parts[0] || '';
  var methodName  = parts[1] || '';
  var serviceName = servicePart.split('.').pop();

  var pathEl = document.getElementById('grpc-path-value');
  if (pathEl) pathEl.textContent = val;

  var sub = document.getElementById('grpc-method-subtitle');
  if (sub) sub.textContent = serviceName + '/' + methodName;

  // hide sig grid in manual mode (no field data)
  if (sigGrid) sigGrid.style.display = 'none';

  grpcManualTypeInput();
  if (detail) detail.style.display = '';
}

function grpcManualTypeInput() {
  var reqInput = document.getElementById('grpc-manual-req-type');
  var resInput = document.getElementById('grpc-manual-res-type');
  var reqTypeEl = document.getElementById('grpc-req-type');
  var resTypeEl = document.getElementById('grpc-res-type');
  if (reqTypeEl) reqTypeEl.textContent = (reqInput && reqInput.value.trim()) || '—';
  if (resTypeEl) resTypeEl.textContent = (resInput && resInput.value.trim()) || '—';
}


function textValue(id) {
  var element = document.getElementById(id);
  return element ? element.value.trim() : '';
}

function setValue(id, value) {
  var element = document.getElementById(id);
  if (element) element.value = value || '';
}

function parseStructuredText(text) {
  if (!text.trim()) return {};
  try {
    return JSON.parse(text);
  } catch (_error) {
    if (!window.jsyaml) throw new Error('YAML parser is not available');
    return window.jsyaml.load(text) || {};
  }
}

function inferSchemaKind(typeName) {
  if (typeName === 'object') return 'object';
  if (typeName === 'array') return 'array';
  if (typeName === 'string') return 'string';
  if (typeName === 'integer') return 'integer';
  if (typeName === 'number') return 'number';
  if (typeName === 'boolean') return 'boolean';
  if (typeName === 'null') return 'null';
  return 'string';
}

function convertJsonSchemaToCrankSchema(node, requiredNames) {
  var schemaNode = node || {};
  var typeName = Array.isArray(schemaNode.type)
    ? schemaNode.type.find(function(value) { return value !== 'null'; }) || 'string'
    : schemaNode.type || (schemaNode.properties ? 'object' : 'string');
  var nullable = Array.isArray(schemaNode.type) && schemaNode.type.indexOf('null') >= 0;
  var kind = schemaNode.enum ? 'enum' : inferSchemaKind(typeName);
  var schema = {
    type: kind,
    description: schemaNode.description || null,
    required: false,
    nullable: nullable,
    default_value: Object.prototype.hasOwnProperty.call(schemaNode, 'default') ? schemaNode.default : null,
    fields: {},
    items: null,
    enum_values: schemaNode.enum || [],
    variants: [],
  };

  if (kind === 'object') {
    var requiredSet = new Set(schemaNode.required || requiredNames || []);
    Object.keys(schemaNode.properties || {}).forEach(function(fieldName) {
      var field = convertJsonSchemaToCrankSchema(schemaNode.properties[fieldName], []);
      field.required = requiredSet.has(fieldName);
      schema.fields[fieldName] = field;
    });
  }

  if (kind === 'array' && schemaNode.items) {
    schema.items = convertJsonSchemaToCrankSchema(schemaNode.items, []);
  }

  return schema;
}

function mappingRootForProtocol(protocol) {
  if (protocol === 'graphql') return '$.request.variables';
  if (protocol === 'grpc') return '$.request.grpc';
  var activeMethod = document.querySelector('.method-card.active');
  var method = activeMethod ? activeMethod.dataset.method : 'POST';
  return method === 'GET' || method === 'DELETE' ? '$.request.query' : '$.request.body';
}

function normalizeInputSource(path) {
  if (typeof path !== 'string') return '$.mcp';
  if (path.indexOf('$.input.') === 0) return '$.mcp.' + path.slice('$.input.'.length);
  if (path === '$.input') return '$.mcp';
  return path;
}

function normalizeOutputSource(path) {
  if (typeof path !== 'string') return '$.response.data';
  return path;
}

function buildMappingSet(rawValue, mode) {
  if (rawValue && Array.isArray(rawValue.rules)) {
    return { rules: rawValue.rules };
  }

  var rules = [];
  if (!rawValue || typeof rawValue !== 'object') {
    return { rules: rules };
  }

  var root = mappingRootForProtocol(wizardProtocol);

  Object.keys(rawValue).forEach(function(key) {
    var source = rawValue[key];
    if (typeof source !== 'string') return;
    if (mode === 'input') {
      rules.push({
        source: normalizeInputSource(source),
        target: root + '.' + key,
        required: false,
      });
      return;
    }

    rules.push({
      source: normalizeOutputSource(source),
      target: '$.output.' + key,
      required: false,
    });
  });

  return { rules: rules };
}

function parseExecutionConfig(text) {
  var value = parseStructuredText(text);
  var retry = value.retry || value.retry_policy || null;
  var headers = value.headers && typeof value.headers === 'object' ? value.headers : {};
  var config = {
    timeout_ms: Number(value.timeout_ms || 10000),
    retry_policy: retry && retry.max_attempts ? { max_attempts: Number(retry.max_attempts) } : null,
    auth_profile_ref: value.auth && value.auth.profile ? value.auth.profile : null,
    headers: headers,
    protocol_options: null,
  };

  if (wizardProtocol === 'grpc') {
    var useTls = false;
    if (value.protocol_options && value.protocol_options.grpc) {
      useTls = !!value.protocol_options.grpc.use_tls;
    } else if (value.tls) {
      useTls = !!value.tls.verify;
    }
    config.protocol_options = { grpc: { use_tls: useTls } };
  }

  return config;
}

function currentUpstream() {
  var selected = upstreams.find(function(item) { return item.id === selectedUpstreamId; });
  if (selected) return selected;

  var customName = textValue('new-upstream-name');
  var customUrl = textValue('new-upstream-url');
  if (!customUrl) return null;

  var authHeaders = textValue('new-upstream-auth-headers');
  return {
    id: 'custom',
    name: customName || 'custom-upstream',
    url: customUrl,
    authHeaders: authHeaders,
  };
}

function joinUrl(baseUrl, path) {
  if (!baseUrl) return path || '';
  if (!path) return baseUrl;
  return baseUrl.replace(/\/+$/, '') + '/' + path.replace(/^\/+/, '');
}

function selectedGraphqlOperationType() {
  var active = document.querySelector('.gql-type-card.active');
  return active ? active.dataset.gqlType : 'query';
}

function graphqlTopLevelField(queryText) {
  var match = queryText.replace(/#[^\n]*/g, '').match(/\{\s*([A-Za-z_][A-Za-z0-9_]*)/);
  return match ? match[1] : null;
}

function graphqlOperationName(queryText) {
  var match = queryText.match(/\b(query|mutation)\s+([A-Za-z_][A-Za-z0-9_]*)/);
  return match ? match[2] : textValue('tool-name');
}

function buildTarget() {
  var upstream = currentUpstream();
  if (!upstream || !upstream.url) {
    throw new Error('Select or register an upstream first');
  }

  var pathTemplate = textValue('endpoint-path') || '/';

  if (wizardProtocol === 'rest') {
    var activeMethod = document.querySelector('.method-card.active');
    return {
      kind: 'rest',
      base_url: upstream.url,
      method: activeMethod ? activeMethod.dataset.method : 'POST',
      path_template: pathTemplate,
      static_headers: parseHeaderMap(upstream.authHeaders),
    };
  }

  if (wizardProtocol === 'graphql') {
    var queryTemplate = textValue('gql-query-editor');
    var topField = graphqlTopLevelField(queryTemplate);
    return {
      kind: 'graphql',
      endpoint: joinUrl(upstream.url, pathTemplate),
      operation_type: selectedGraphqlOperationType(),
      operation_name: graphqlOperationName(queryTemplate),
      query_template: queryTemplate,
      response_path: topField ? '$.response.body.data.' + topField : '$.response.body.data',
    };
  }

  var route = textValue('grpc-manual-route') || (document.getElementById('grpc-path-value') ? document.getElementById('grpc-path-value').textContent.trim() : '');
  var descriptorRef = wizardCurrentVersion && wizardCurrentVersion.target && wizardCurrentVersion.target.kind === 'grpc'
    ? wizardCurrentVersion.target.descriptor_ref
    : 'desc_pending';
  var descriptorSetB64 = wizardCurrentVersion && wizardCurrentVersion.target && wizardCurrentVersion.target.kind === 'grpc'
    ? (wizardCurrentVersion.target.descriptor_set_b64 || '')
    : '';
  var parsedRoute = parseGrpcRoute(route);

  return {
    kind: 'grpc',
    server_addr: upstream.url,
    package: parsedRoute.package,
    service: parsedRoute.service,
    method: parsedRoute.method,
    descriptor_ref: descriptorRef,
    descriptor_set_b64: descriptorSetB64,
  };
}

function parseGrpcRoute(route) {
  var normalized = route.replace(/^\/+/, '');
  var parts = normalized.split('/');
  if (parts.length !== 2) {
    return {
      package: '',
      service: '',
      method: '',
    };
  }

  var servicePart = parts[0];
  var method = parts[1];
  var serviceSegments = servicePart.split('.');
  var service = serviceSegments.pop() || '';
  var packageName = serviceSegments.join('.');

  return {
    package: packageName,
    service: service,
    method: method,
  };
}

function parseHeaderMap(text) {
  if (!text || !text.trim()) return {};
  var value = parseStructuredText(text);
  return value && typeof value === 'object' ? value : {};
}

function buildToolDescription() {
  return {
    title: textValue('tool-title') || textValue('tool-display-name') || textValue('tool-name'),
    description: textValue('tool-description'),
    tags: [],
    examples: [],
  };
}

function collectWizardPayload() {
  var name = textValue('tool-name');
  if (!name) throw new Error('Tool name is required');

  var inputSchemaValue = parseStructuredText(textValue('tool-input-schema'));
  var outputSchemaValue = parseStructuredText(textValue('tool-output-schema'));
  var inputMappingValue = parseStructuredText(textValue('tool-input-mapping'));
  var outputMappingValue = parseStructuredText(textValue('tool-output-mapping'));

  return {
    name: name,
    display_name: textValue('tool-display-name') || name,
    category: 'general',
    protocol: wizardProtocol,
    target: buildTarget(),
    input_schema: convertJsonSchemaToCrankSchema(inputSchemaValue, []),
    output_schema: convertJsonSchemaToCrankSchema(outputSchemaValue, []),
    input_mapping: buildMappingSet(inputMappingValue, 'input'),
    output_mapping: buildMappingSet(outputMappingValue, 'output'),
    execution_config: parseExecutionConfig(textValue('tool-exec-config')),
    tool_description: buildToolDescription(),
  };
}

async function saveOperation(stayOnPage) {
  try {
    await persistCurrentDraft(stayOnPage);
  } catch (error) {
    alert(error.message || 'Failed to save operation');
  }
}

async function loadOperationForEdit() {
  if (!wizardWorkspaceId || !wizardEditId) return;
  var detail = await window.CrankApi.getOperation(wizardWorkspaceId, wizardEditId);
  wizardProtocol = detail.protocol || 'rest';
  await loadWizardPanels([3]);
  var draftVersion = await window.CrankApi.getOperationVersion(
    wizardWorkspaceId,
    wizardEditId,
    detail.draft_version_ref.version
  );
  wizardCurrentOperation = detail;
  wizardCurrentVersion = draftVersion;
  prefillWizardFromEdit(detail, draftVersion);
}

function setEditModePresentation() {
  var progressLabel = document.querySelector('.progress-label');
  if (progressLabel) progressLabel.textContent = 'Edit operation';
  var sidebarBrand = document.querySelector('.step-sidebar-brand');
  if (sidebarBrand) sidebarBrand.innerHTML = 'Edit <span>operation</span>';
}

function selectProtocol(protocol) {
  wizardProtocol = protocol || 'rest';
  document.querySelectorAll('.protocol-card').forEach(function(card) {
    var proto = card.dataset.protocol
      || (card.classList.contains('rest') ? 'rest' : card.classList.contains('graphql') ? 'graphql' : 'grpc');
    var selected = proto === wizardProtocol;
    card.classList.toggle('selected', selected);
    card.setAttribute('aria-checked', selected ? 'true' : 'false');
  });
  var s3name = document.getElementById('sidebar-step-3-name');
  if (s3name) s3name.textContent = STEP3_LABELS[wizardProtocol] || 'Protocol config';
  updateWizardProtocolVisibility();
}

function prefillUpstream(baseUrl, headers) {
  var known = upstreams.find(function(item) { return item.url === baseUrl; });
  if (known) {
    pickUpstream(known.id);
    return;
  }

  selectedUpstreamId = null;
  var trigger = document.getElementById('upstream-new-trigger');
  var form = document.getElementById('upstream-new-form');
  if (trigger) trigger.classList.add('active');
  if (form) form.style.display = '';
  setValue('new-upstream-name', 'imported-upstream');
  setValue('new-upstream-url', baseUrl);
  setValue('new-upstream-auth-headers', headers && Object.keys(headers).length ? JSON.stringify(headers, null, 2) : '{\n}');

  var valueEl = document.getElementById('upstream-combobox-value');
  if (valueEl) {
    valueEl.innerHTML =
      '<div class="upstream-trigger-name">imported-upstream</div>' +
      '<div class="upstream-trigger-url">' + escapeHtml(baseUrl) + '</div>';
  }
}

function crankSchemaToJsonSchema(schema) {
  var result = {};
  var typeName = schema.type === 'enum' ? 'string' : schema.type;
  result.type = schema.nullable ? [typeName, 'null'] : typeName;
  if (schema.description) result.description = schema.description;
  if (schema.default_value !== null && schema.default_value !== undefined) result.default = schema.default_value;
  if (schema.enum_values && schema.enum_values.length) result.enum = schema.enum_values.slice();
  if (schema.type === 'object') {
    result.type = schema.nullable ? ['object', 'null'] : 'object';
    result.properties = {};
    var required = [];
    Object.keys(schema.fields || {}).forEach(function(fieldName) {
      var field = schema.fields[fieldName];
      result.properties[fieldName] = crankSchemaToJsonSchema(field);
      if (field.required) required.push(fieldName);
    });
    if (required.length) result.required = required;
    result.additionalProperties = false;
  }
  if (schema.type === 'array' && schema.items) {
    result.items = crankSchemaToJsonSchema(schema.items);
  }
  return result;
}

function mappingSetToEditorValue(mappingSet, mode, protocol) {
  var rules = mappingSet && mappingSet.rules ? mappingSet.rules : [];
  var object = {};
  rules.forEach(function(rule) {
    if (mode === 'input') {
      var key = rule.target.replace(mappingRootForProtocol(protocol) + '.', '');
      object[key] = rule.source.replace('$.mcp.', '$.input.');
      return;
    }
    var outputKey = rule.target.replace('$.output.', '');
    object[outputKey] = rule.source;
  });
  return window.jsyaml ? window.jsyaml.dump(object, { lineWidth: -1 }) : JSON.stringify(object, null, 2);
}

function executionConfigToEditorValue(config) {
  var value = {
    timeout_ms: config.timeout_ms,
  };
  if (config.retry_policy) {
    value.retry = { max_attempts: config.retry_policy.max_attempts };
  }
  if (config.auth_profile_ref) {
    value.auth = { profile: config.auth_profile_ref };
  }
  if (config.headers && Object.keys(config.headers).length) {
    value.headers = config.headers;
  }
  if (config.protocol_options && config.protocol_options.grpc) {
    value.tls = { verify: !!config.protocol_options.grpc.use_tls };
  }
  return window.jsyaml ? window.jsyaml.dump(value, { lineWidth: -1 }) : JSON.stringify(value, null, 2);
}

function prefillWizardFromEdit(detail, versionDocument) {
  if (!detail || !versionDocument) return;

  setEditModePresentation();
  selectProtocol(detail.protocol);

  var target = versionDocument.target || {};
  if (target.kind === 'rest') {
    prefillUpstream(target.base_url, target.static_headers);
    setValue('endpoint-path', target.path_template);
    document.querySelectorAll('.method-card').forEach(function(card) {
      card.classList.toggle('active', card.dataset.method === target.method);
    });
  } else if (target.kind === 'graphql') {
    var endpoint = target.endpoint || '';
    var parsedEndpoint = new URL(endpoint, window.location.origin);
    prefillUpstream(parsedEndpoint.origin, {});
    setValue('endpoint-path', parsedEndpoint.pathname + parsedEndpoint.search);
    setValue('gql-query-editor', target.query_template);
    document.querySelectorAll('.gql-type-card').forEach(function(card) {
      card.classList.toggle('active', card.dataset.gqlType === target.operation_type);
    });
  } else if (target.kind === 'grpc') {
    prefillUpstream(target.server_addr, {});
    var route = '/' + (target.package ? target.package + '.' : '') + target.service + '/' + target.method;
    setValue('grpc-manual-route', route);
    setValue('grpc-manual-req-type', '');
    setValue('grpc-manual-res-type', '');
    grpcManualRouteInput(route);
    grpcManualTypeInput();
  }

  setValue('tool-name', detail.name);
  setValue('tool-display-name', detail.display_name);
  setValue('tool-title', versionDocument.tool_description ? versionDocument.tool_description.title : detail.display_name);
  setValue('tool-description', versionDocument.tool_description ? versionDocument.tool_description.description : '');
  setValue('tool-input-schema', JSON.stringify(crankSchemaToJsonSchema(versionDocument.input_schema), null, 2));
  setValue('tool-output-schema', JSON.stringify(crankSchemaToJsonSchema(versionDocument.output_schema), null, 2));
  setValue('tool-input-mapping', mappingSetToEditorValue(versionDocument.input_mapping, 'input', detail.protocol));
  setValue('tool-output-mapping', mappingSetToEditorValue(versionDocument.output_mapping, 'output', detail.protocol));
  setValue('tool-exec-config', executionConfigToEditorValue(versionDocument.execution_config));

  var toolNameInput = document.getElementById('tool-name');
  if (toolNameInput) toolNameInput.disabled = true;
  updateWizardProtocolVisibility();
}

function bindWizardLiveActions() {
  bindClick('wizard-upload-input-sample', uploadInputSampleFromWizard);
  bindClick('wizard-upload-output-sample', uploadOutputSampleFromWizard);
  bindClick('wizard-generate-draft', generateDraftFromWizard);
  bindClick('wizard-run-test', runWizardTest);
  bindClick('wizard-copy-test-response', copyTestResponseToOutputSample);
  bindClick('wizard-export-yaml', exportWizardYaml);
  bindClick('wizard-import-yaml', importWizardYaml);
  bindClick('wizard-publish-operation', publishWizardOperation);
  bindClick('wizard-select-descriptor-set', function() {
    var input = document.getElementById('wizard-descriptor-set-input');
    if (input) input.click();
  });
  bindClick('wizard-upload-descriptor-set', uploadDescriptorSetAndDiscover);
  bindClick('wizard-import-yaml-file-trigger', function() {
    var input = document.getElementById('wizard-import-yaml-file');
    if (input) input.click();
  });

  var descriptorInput = document.getElementById('wizard-descriptor-set-input');
  if (descriptorInput) descriptorInput.addEventListener('change', handleDescriptorSetSelection);

  var yamlInput = document.getElementById('wizard-import-yaml-file');
  if (yamlInput) yamlInput.addEventListener('change', handleImportYamlFileSelection);
}

function bindClick(id, handler) {
  var element = document.getElementById(id);
  if (!element) return;
  element.addEventListener('click', function(event) {
    event.preventDefault();
    handler();
  });
}

function updateWizardProtocolVisibility() {
  var grpcTools = document.getElementById('wizard-grpc-live-tools');
  if (grpcTools) grpcTools.style.display = wizardProtocol === 'grpc' ? '' : 'none';
}

function showWizardLiveStatus(title, text, isError) {
  var root = document.getElementById('wizard-live-status');
  var titleEl = document.getElementById('wizard-live-status-title');
  var textEl = document.getElementById('wizard-live-status-text');
  if (!root || !titleEl || !textEl) return;
  titleEl.textContent = title;
  textEl.textContent = text;
  root.style.display = '';
  root.style.borderColor = isError ? 'rgba(248, 113, 113, 0.35)' : '';
}

function currentDraftVersion() {
  if (wizardCurrentOperation && wizardCurrentOperation.draft_version_ref) {
    return wizardCurrentOperation.draft_version_ref.version;
  }
  if (wizardCurrentOperation && wizardCurrentOperation.current_draft_version) {
    return wizardCurrentOperation.current_draft_version;
  }
  if (wizardCurrentVersion && wizardCurrentVersion.version) {
    return wizardCurrentVersion.version;
  }
  return 1;
}

function updateOperationPayload(payload) {
  return {
    display_name: payload.display_name,
    category: payload.category,
    target: payload.target,
    input_schema: payload.input_schema,
    output_schema: payload.output_schema,
    input_mapping: payload.input_mapping,
    output_mapping: payload.output_mapping,
    execution_config: payload.execution_config,
    tool_description: payload.tool_description,
  };
}

async function refreshCurrentOperationState() {
  if (!wizardWorkspaceId || !wizardEditId) return null;
  var detail = await window.CrankApi.getOperation(wizardWorkspaceId, wizardEditId);
  var versionNumber = detail.draft_version_ref
    ? detail.draft_version_ref.version
    : detail.current_draft_version;
  var versionDocument = await window.CrankApi.getOperationVersion(
    wizardWorkspaceId,
    wizardEditId,
    versionNumber
  );
  wizardCurrentOperation = detail;
  wizardCurrentVersion = versionDocument;
  updateWizardProtocolVisibility();
  return {
    detail: detail,
    version: versionDocument,
  };
}

async function uploadPendingGrpcArtifacts(payload) {
  if (wizardProtocol !== 'grpc' || !wizardEditId) return;

  var descriptorResponse = null;

  if (wizardProtoUpload) {
    descriptorResponse = await window.CrankApi.uploadProtoFile(
      wizardWorkspaceId,
      wizardEditId,
      new TextEncoder().encode(wizardProtoUpload.content),
      wizardProtoUpload.fileName
    );
    wizardProtoUpload = null;
  }

  if (wizardDescriptorSetUpload) {
    descriptorResponse = await window.CrankApi.uploadDescriptorSet(
      wizardWorkspaceId,
      wizardEditId,
      wizardDescriptorSetUpload.bytes,
      wizardDescriptorSetUpload.fileName
    );
    wizardDescriptorSetUpload = null;
    var descriptorName = document.getElementById('wizard-descriptor-set-name');
    if (descriptorName) descriptorName.textContent = 'Descriptor set uploaded';
  }

  if (!descriptorResponse) return;

  payload.target.descriptor_ref = descriptorResponse.descriptor_id;
  payload.target.descriptor_set_b64 = '';
  await window.CrankApi.updateOperation(
    wizardWorkspaceId,
    wizardEditId,
    updateOperationPayload(payload)
  );
}

async function persistCurrentDraft(stayOnPage) {
  if (!wizardWorkspaceId) {
    throw new Error('No workspace selected');
  }

  var payload = collectWizardPayload();
  var response;
  var createdNow = false;

  if (wizardMode === 'edit' && wizardEditId) {
    response = await window.CrankApi.updateOperation(
      wizardWorkspaceId,
      wizardEditId,
      updateOperationPayload(payload)
    );
  } else {
    response = await window.CrankApi.createOperation(wizardWorkspaceId, payload);
    createdNow = true;
    wizardEditId = response.operation_id;
    wizardMode = 'edit';
    history.replaceState(
      {},
      '',
      window.location.pathname + '?mode=edit&operationId=' + encodeURIComponent(wizardEditId)
    );
    setEditModePresentation();
    _doGoToStep(currentStep);
    var toolNameInput = document.getElementById('tool-name');
    if (toolNameInput) toolNameInput.disabled = true;
  }

  await uploadPendingGrpcArtifacts(payload);
  await refreshCurrentOperationState();

  if (stayOnPage) {
    var saveDraftBtn = document.querySelector('.btn-save-draft');
    if (saveDraftBtn) {
      var label = saveDraftBtn.textContent;
      saveDraftBtn.textContent = 'Saved ✓';
      setTimeout(function() {
        saveDraftBtn.textContent = label;
      }, 1400);
    }
  }

  showWizardLiveStatus(
    createdNow ? 'Draft created' : 'Draft updated',
    'The current draft is saved on the backend and ready for live actions in this wizard.'
  );
  return response;
}

function safeStringify(value) {
  if (value === null || value === undefined) return '';
  if (typeof value === 'string') return value;
  return JSON.stringify(value, null, 2);
}

function setTextareaValue(id, value) {
  var element = document.getElementById(id);
  if (!element) return;
  element.value = safeStringify(value);
}

async function uploadInputSampleFromWizard() {
  await persistCurrentDraft(true);
  await window.CrankApi.uploadInputSample(
    wizardWorkspaceId,
    wizardEditId,
    parseStructuredText(textValue('wizard-input-sample'))
  );
  showWizardLiveStatus('Input sample saved', 'The input sample is now stored against the current draft version.');
}

async function uploadOutputSampleFromWizard() {
  await persistCurrentDraft(true);
  await window.CrankApi.uploadOutputSample(
    wizardWorkspaceId,
    wizardEditId,
    parseStructuredText(textValue('wizard-output-sample'))
  );
  showWizardLiveStatus('Output sample saved', 'The output sample is now stored against the current draft version.');
}

async function generateDraftFromWizard() {
  await persistCurrentDraft(true);
  var generated = await window.CrankApi.generateDraft(wizardWorkspaceId, wizardEditId, {});
  setValue('tool-input-schema', JSON.stringify(crankSchemaToJsonSchema(generated.input_schema), null, 2));
  setValue('tool-output-schema', JSON.stringify(crankSchemaToJsonSchema(generated.output_schema), null, 2));
  setValue('tool-input-mapping', mappingSetToEditorValue(generated.input_mapping, 'input', wizardProtocol));
  setValue('tool-output-mapping', mappingSetToEditorValue(generated.output_mapping, 'output', wizardProtocol));
  showWizardLiveStatus('Draft generated', 'Schemas and mappings were regenerated from the saved samples.');
}

async function runWizardTest() {
  await persistCurrentDraft(true);
  var result = await window.CrankApi.runOperationTest(wizardWorkspaceId, wizardEditId, {
    version: currentDraftVersion(),
    input: parseStructuredText(textValue('wizard-test-input')),
  });
  wizardTestResponsePreview = result.response_preview;
  setTextareaValue('wizard-test-request-preview', result.request_preview);
  setTextareaValue('wizard-test-response-preview', result.response_preview);
  setTextareaValue('wizard-test-errors', result.errors && result.errors.length ? result.errors : []);
  showWizardLiveStatus(
    result.ok ? 'Test run completed' : 'Test run returned errors',
    result.ok
      ? 'The current draft executed successfully against the upstream.'
      : 'The draft executed, but the backend returned validation or runtime errors.',
    !result.ok
  );
}

function copyTestResponseToOutputSample() {
  if (!wizardTestResponsePreview) {
    showWizardLiveStatus('No test response yet', 'Run a test first, then copy the response preview into the output sample editor.', true);
    return;
  }
  setTextareaValue('wizard-output-sample', wizardTestResponsePreview);
  showWizardLiveStatus('Response copied', 'The latest test response was copied into the output sample editor.');
}

function downloadTextFile(fileName, content, mimeType) {
  var blob = new Blob([content], { type: mimeType || 'text/plain;charset=utf-8' });
  var url = URL.createObjectURL(blob);
  var link = document.createElement('a');
  link.href = url;
  link.download = fileName;
  link.click();
  URL.revokeObjectURL(url);
}

async function exportWizardYaml() {
  await persistCurrentDraft(true);
  var yaml = await window.CrankApi.exportOperation(wizardWorkspaceId, wizardEditId, {
    mode: 'portable',
    version: currentDraftVersion(),
  });
  downloadTextFile((textValue('tool-name') || 'operation') + '.yaml', yaml, 'application/yaml');
  showWizardLiveStatus('YAML exported', 'The current draft YAML was downloaded from the backend.');
}

async function importWizardYaml() {
  if (!wizardWorkspaceId) {
    throw new Error('No workspace selected');
  }
  var yamlDocument = textValue('wizard-import-yaml-text');
  if (!yamlDocument) {
    showWizardLiveStatus('No YAML provided', 'Paste a YAML document or load it from a file before importing.', true);
    return;
  }
  var imported = await window.CrankApi.importOperation(wizardWorkspaceId, yamlDocument, 'upsert');
  showWizardLiveStatus('YAML imported', 'The imported operation draft was stored. The wizard will reopen it now.');
  window.location.href = window.location.pathname + '?mode=edit&operationId=' + encodeURIComponent(imported.operation_id);
}

async function publishWizardOperation() {
  await persistCurrentDraft(true);
  var published = await window.CrankApi.publishOperation(
    wizardWorkspaceId,
    wizardEditId,
    currentDraftVersion()
  );
  await refreshCurrentOperationState();
  showWizardLiveStatus(
    'Operation published',
    'Version ' + published.published_version + ' is now published and can be bound into agents.'
  );
}

function handleImportYamlFileSelection(event) {
  var file = event.target.files && event.target.files[0];
  if (!file) return;
  var reader = new FileReader();
  reader.onload = function(loadEvent) {
    setValue('wizard-import-yaml-text', loadEvent.target.result || '');
    showWizardLiveStatus('YAML loaded', 'The YAML document was loaded into the import editor.');
  };
  reader.readAsText(file);
}

function handleDescriptorSetSelection(event) {
  var file = event.target.files && event.target.files[0];
  if (!file) return;
  var reader = new FileReader();
  reader.onload = function(loadEvent) {
    wizardDescriptorSetUpload = {
      fileName: file.name,
      bytes: new Uint8Array(loadEvent.target.result),
    };
    var fileNameEl = document.getElementById('wizard-descriptor-set-name');
    if (fileNameEl) fileNameEl.textContent = file.name;
    showWizardLiveStatus('Descriptor set selected', 'Upload the descriptor set to discover unary gRPC methods from the backend.');
  };
  reader.readAsArrayBuffer(file);
}

function renderDescriptorServiceList(services) {
  grpcDescriptorServices = services || [];
  var summaryEl = document.getElementById('wizard-descriptor-services-summary');
  var listEl = document.getElementById('wizard-descriptor-services-list');
  if (!summaryEl || !listEl) return;

  var methodCount = grpcDescriptorServices.reduce(function(total, service) {
    return total + ((service.methods || []).length);
  }, 0);
  summaryEl.textContent = grpcDescriptorServices.length
    ? (grpcDescriptorServices.length + ' services · ' + methodCount + ' unary methods discovered')
    : 'No unary methods discovered yet';
  listEl.innerHTML = '';

  grpcDescriptorServices.forEach(function(service, serviceIndex) {
    var group = document.createElement('div');
    group.className = 'config-card';
    group.style.marginBottom = '0';

    var body = document.createElement('div');
    body.className = 'config-card-body';
    body.style.padding = '16px';
    body.style.gap = '10px';

    var title = document.createElement('div');
    title.className = 'config-card-title';
    title.textContent = (service.package ? service.package + '.' : '') + service.service;
    body.appendChild(title);

    (service.methods || []).forEach(function(method, methodIndex) {
      var button = document.createElement('button');
      button.type = 'button';
      button.className = 'btn-ghost-sm';
      button.style.width = '100%';
      button.style.justifyContent = 'space-between';
      button.textContent = method.name;
      button.addEventListener('click', function() {
        applyDiscoveredGrpcMethod(serviceIndex, methodIndex);
      });
      body.appendChild(button);
    });

    group.appendChild(body);
    listEl.appendChild(group);
  });
}

function applyDiscoveredGrpcMethod(serviceIndex, methodIndex) {
  var service = grpcDescriptorServices[serviceIndex];
  var method = service && service.methods ? service.methods[methodIndex] : null;
  if (!service || !method) return;

  var route = '/' + (service.package ? service.package + '.' : '') + service.service + '/' + method.name;
  selectGrpcSource('manual');
  setValue('grpc-manual-route', route);
  setValue('grpc-manual-req-type', method.name + 'Request');
  setValue('grpc-manual-res-type', method.name + 'Response');
  grpcManualRouteInput(route);
  grpcManualTypeInput();
  setValue('tool-input-schema', JSON.stringify(crankSchemaToJsonSchema(method.input_schema), null, 2));
  setValue('tool-output-schema', JSON.stringify(crankSchemaToJsonSchema(method.output_schema), null, 2));
  showWizardLiveStatus('gRPC method applied', 'The route and schemas were filled from the uploaded descriptor set.');
}

async function uploadDescriptorSetAndDiscover() {
  var hasSavedDescriptor = !!(
    wizardCurrentVersion
    && wizardCurrentVersion.target
    && wizardCurrentVersion.target.kind === 'grpc'
    && wizardCurrentVersion.target.descriptor_ref
  );

  if (!wizardDescriptorSetUpload && !hasSavedDescriptor) {
    showWizardLiveStatus('No descriptor set selected', 'Choose a descriptor-set file before uploading it, or save a draft that already has one attached.', true);
    return;
  }

  await persistCurrentDraft(true);

  var services = await window.CrankApi.listGrpcServices(
    wizardWorkspaceId,
    wizardEditId,
    currentDraftVersion()
  );
  renderDescriptorServiceList(services.services || []);
  showWizardLiveStatus('Descriptor services discovered', 'The backend parsed the descriptor set. Pick a method to apply its route and schemas.');
}