import { apiAction, toast } from './api.js';

const state = {
  settings: {},
  rotate: { bridge: false, sender: false, external: false },
  users: [],
  userMap: new Map(),
  senders: [],
  senderMap: new Map(),
  currentTab: 'profile',
  loading: false,
};

const pageType = document.body?.dataset?.page || 'account';
const DEBUG_EMAIL = 'madmin@papa-kind-treff.info';
const MAX_CONSOLE_LINES = 200;

let avatarBtn;
let userMenuPanel;
let profileForm;
let passwordForm;
let settingsForm;
let teamTable;
let userForm;
let senderTable;
let senderForm;
let menuInitialized = false;
let menuOpen = false;
let debugButton;
let debugDialog;
let debugPhpLoaded = false;
let debugPhpLoading = false;
let debugActiveTab = 'php';
let phpInfoContainer;
let consoleContainer;
let debugStylesInjected = false;
let consolePatched = false;
const consoleBuffer = [];
let adminTablesAllSelect;
let adminTablesSelectedSelect;
let adminTablesAddBtn;
let adminTablesRemoveBtn;

ensureConsoleCapture();

export function initUserPanel() {
  avatarBtn = document.getElementById('btn-user');
  userMenuPanel = document.getElementById('userMenuPanel');
  ensureConsoleCapture();
  handleUserContextChange();
  if (!menuInitialized && avatarBtn && userMenuPanel) {
    avatarBtn.addEventListener('click', toggleUserMenu);
    document.addEventListener('click', handleDocumentClick, true);
    document.addEventListener('keydown', handleMenuKeydown);
    userMenuPanel.addEventListener('click', handleMenuItemClick);
    menuInitialized = true;
  }
}

export function initAccountPage() {
  profileForm = document.getElementById('profileForm');
  passwordForm = document.getElementById('passwordForm');
  settingsForm = document.getElementById('settingsForm');
  teamTable = document.getElementById('teamTable');
  userForm = document.getElementById('userForm');
  senderTable = document.getElementById('senderTable');
  senderForm = document.getElementById('senderForm');
  adminTablesAllSelect = document.getElementById('adminBridgeTablesAll');
  adminTablesSelectedSelect = document.getElementById('adminBridgeTablesSelected');
  adminTablesAddBtn = document.getElementById('adminBridgeTablesAdd');
  adminTablesRemoveBtn = document.getElementById('adminBridgeTablesRemove');

  document.getElementById('btn-user-add')?.addEventListener('click', () => openUserForm());
  document.getElementById('userFormCancel')?.addEventListener('click', () => closeUserForm());
  userForm?.addEventListener('submit', submitUserForm);

  document.getElementById('btn-sender-add')?.addEventListener('click', () => openSenderForm());
  document.getElementById('senderFormCancel')?.addEventListener('click', () => closeSenderForm());
  senderForm?.addEventListener('submit', submitSenderForm);

  profileForm?.addEventListener('submit', submitProfileForm);
  passwordForm?.addEventListener('submit', submitPasswordForm);
  settingsForm?.addEventListener('submit', submitSettingsForm);
  teamTable?.addEventListener('click', handleTeamTableClick);
  senderTable?.addEventListener('click', handleSenderTableClick);
  document.querySelectorAll('[data-user-tab]').forEach(btn => {
    btn.addEventListener('click', () => switchTab(btn.getAttribute('data-user-tab')));
  });

  if (settingsForm) {
    settingsForm.querySelectorAll('button[data-rotate]').forEach(btn => {
      btn.addEventListener('click', () => {
        const type = btn.getAttribute('data-rotate');
        if (type && state.rotate[type] !== undefined) {
          state.rotate[type] = true;
          toast('Token wird nach dem Speichern erneuert.', true, { duration: 2000 });
        }
      });
    });

    settingsForm.querySelectorAll('button[data-download]').forEach(btn => {
      btn.addEventListener('click', () => {
        const type = btn.getAttribute('data-download');
        if (type) downloadFile(type);
      });
    });
  }

  adminTablesAddBtn?.addEventListener('click', () => {
    addAdminTables(getSelectedOptions(adminTablesAllSelect));
  });
  adminTablesRemoveBtn?.addEventListener('click', () => {
    removeAdminTables(getSelectedOptions(adminTablesSelectedSelect));
  });

  window.addEventListener('bridge-setup-updated', (ev) => {
    const setup = ev?.detail || {};
    refreshAdminTables(setup.tables || [], state.settings.bridge_tables || []);
  });

  switchTab(state.currentTab);
  loadAccountData();
  updateRoleVisibility();
}

function isOwner() {
  return (window.__currentUser?.role || '').toLowerCase() === 'owner';
}

function isAdmin() {
  const role = (window.__currentUser?.role || '').toLowerCase();
  return role === 'owner' || role === 'admin';
}

function enforcePageAccess() {
  if (pageType !== 'admin') return;
  if (isAdmin()) return;
  toast('Kein Zugriff auf diesen Bereich', false, { duration: 2500 });
  window.location.href = '/admin/profile.php';
}

function handleUserContextChange() {
  updateAvatar();
  updateRoleVisibility();
  enforcePageAccess();
  refreshDebugAccess();
}

function updateAvatar() {
  const target = document.getElementById('userAvatar');
  if (!target) return;
  const name = window.__currentUser?.name || window.__currentUser?.email || '';
  target.textContent = name ? name.trim().charAt(0).toUpperCase() : 'U';
}

function toggleUserMenu(ev) {
  ev?.preventDefault();
  if (!userMenuPanel || !avatarBtn) return;
  menuOpen = !menuOpen;
  userMenuPanel.classList.toggle('hidden', !menuOpen);
  avatarBtn.setAttribute('aria-expanded', menuOpen ? 'true' : 'false');
}

function closeUserMenu() {
  if (!menuOpen) return;
  menuOpen = false;
  if (userMenuPanel) userMenuPanel.classList.add('hidden');
  if (avatarBtn) avatarBtn.setAttribute('aria-expanded', 'false');
}

function handleDocumentClick(ev) {
  if (!userMenuPanel || !avatarBtn || !menuOpen) return;
  const target = ev.target;
  if (avatarBtn.contains(target) || userMenuPanel.contains(target)) return;
  closeUserMenu();
}

function handleMenuKeydown(ev) {
  if (ev.key === 'Escape') {
    closeUserMenu();
  }
}

function handleMenuItemClick(ev) {
  const item = ev.target.closest('.user-menu-item');
  if (!item) return;
  closeUserMenu();
}

function updateRoleVisibility() {
  const role = (window.__currentUser?.role || '').toLowerCase();
  document.querySelectorAll('[data-role]').forEach(el => {
    const allowed = (el.getAttribute('data-role') || '').split(/[\s,]+/).filter(Boolean).map(r => r.toLowerCase());
    if (!allowed.length) return;
    const visible = allowed.some(targetRole => {
      if (targetRole === 'owner') return role === 'owner';
      if (targetRole === 'admin') return role === 'owner' || role === 'admin';
      if (targetRole === 'editor') return role === 'owner' || role === 'admin' || role === 'editor';
      return true;
    });
    el.classList.toggle('hidden', !visible);
  });
  document.querySelectorAll('.owner-only').forEach(el => {
    el.classList.toggle('hidden', !isOwner());
  });
}

function switchTab(tab) {
  if (!tab) return;
  state.currentTab = tab;
  document.querySelectorAll('[data-user-panel]').forEach(panel => {
    panel.classList.toggle('hidden', panel.getAttribute('data-user-panel') !== tab);
  });
  document.querySelectorAll('[data-user-tab]').forEach(btn => {
    const isActive = btn.getAttribute('data-user-tab') === tab;
    btn.classList.toggle('bg-sky-50', isActive);
    btn.classList.toggle('text-sky-700', isActive);
  });
}

async function loadAccountData() {
  try {
    state.loading = true;
    const res = await apiAction('account.profile.get', { method: 'GET' });
    if (!res?.ok) throw new Error(res?.error || 'Profil konnte nicht geladen werden');
    if (res.user) {
      window.__currentUser = res.user;
      handleUserContextChange();
    }
    fillProfileForm(res.user);
    fillSettingsForm(res.settings || {});
    if (teamTable && isOwner()) {
      await loadUsers();
    }
    if (senderTable) {
      if (isAdmin()) {
        await loadSenders();
      } else {
        state.senders = [];
        state.senderMap = new Map();
        renderSenderList();
      }
    }
    reportViewDebugInfo(res);
  } catch (err) {
    console.error(err);
    toast(err.message || 'Fehler beim Laden', false);
  } finally {
    state.loading = false;
  }
}

function fillProfileForm(user) {
  if (!profileForm) return;
  profileForm.name.value = user?.name || '';
  profileForm.email.value = user?.email || '';
}

function fillSettingsForm(settings) {
  state.settings = settings;
  if (!settingsForm) return;
  settingsForm.bridge_url.value = settings.bridge_url || '';
  settingsForm.bridge_token.value = settings.bridge_token || '';
  settingsForm.sender_token.value = settings.sender_token || '';
  settingsForm.external_api_token.value = settings.external_api_token || '';
  state.rotate = { bridge: false, sender: false, external: false };
  refreshAdminTables(settings.bridge_setup?.tables || [], settings.bridge_tables || []);
}

async function submitProfileForm(ev) {
  ev.preventDefault();
  const data = {
    name: profileForm.name.value.trim(),
    email: profileForm.email.value.trim(),
  };
  try {
    const res = await apiAction('account.profile.update', { method: 'POST', data });
    if (!res?.ok) throw new Error(res?.error || 'Profil konnte nicht gespeichert werden');
    window.__currentUser = res.user;
    handleUserContextChange();
    toast('Profil aktualisiert', true);
  } catch (err) {
    toast(err.message || 'Fehler beim Speichern', false);
  }
}

async function submitPasswordForm(ev) {
  ev.preventDefault();
  const data = {
    current_password: passwordForm.current_password.value,
    new_password: passwordForm.new_password.value,
  };
  try {
    const res = await apiAction('account.password.update', { method: 'POST', data });
    if (!res?.ok) throw new Error(res?.error || 'Passwort konnte nicht geändert werden');
    passwordForm.reset();
    toast('Passwort aktualisiert', true);
  } catch (err) {
    toast(err.message || 'Fehler beim Speichern', false);
  }
}

async function submitSettingsForm(ev) {
  ev.preventDefault();
  const bridgeTables = normalizeTableList(state.settings.bridge_tables || []);
  const data = {
    bridge_url: settingsForm.bridge_url.value.trim(),
    bridge_token: settingsForm.bridge_token.value.trim(),
    sender_token: settingsForm.sender_token.value.trim(),
    external_api_token: settingsForm.external_api_token.value.trim(),
    bridge_tables: bridgeTables,
    rotate_bridge_token: state.rotate.bridge ? 1 : 0,
    rotate_sender_token: state.rotate.sender ? 1 : 0,
    rotate_external_token: state.rotate.external ? 1 : 0,
  };
  try {
    const res = await apiAction('account.settings.update', { method: 'POST', data });
    if (!res?.ok) throw new Error(res?.error || 'Einstellungen konnten nicht gespeichert werden');
    fillSettingsForm(res.settings || {});
    toast('Integrationen gespeichert', true);
  } catch (err) {
    toast(err.message || 'Fehler beim Speichern', false);
  }
}

async function downloadFile(type) {
  try {
    const action = type === 'sender' ? 'downloads.sender' : 'downloads.bridge';
    const res = await apiAction(action, { method: 'POST', data: {} });
    if (!res?.ok || !res.content) throw new Error(res?.error || 'Download fehlgeschlagen');
    const bytes = atob(res.content);
    const buffer = new Uint8Array(bytes.length);
    for (let i = 0; i < bytes.length; i++) buffer[i] = bytes.charCodeAt(i);
    const blob = new Blob([buffer], { type: 'application/octet-stream' });
    const url = URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = url;
    link.download = res.file_name || `${type}.php`;
    document.body.appendChild(link);
    link.click();
    link.remove();
    setTimeout(() => URL.revokeObjectURL(url), 1000);
  } catch (err) {
    toast(err.message || 'Download fehlgeschlagen', false);
  }
}

function normalizeTableList(input) {
  const items = Array.isArray(input) ? input : (typeof input === 'string' ? input.split(/[\s,]+/) : []);
  const result = [];
  const seen = new Set();
  items.forEach(entry => {
    const name = String(entry || '').trim();
    if (name && !seen.has(name)) {
      seen.add(name);
      result.push(name);
    }
  });
  return result;
}

function refreshAdminTables(availableTables, selectedTables) {
  const whitelist = normalizeTableList(availableTables);
  let selected = normalizeTableList(selectedTables);
  if (!selected.length) {
    selected = whitelist.slice();
  }
  if (whitelist.length) {
    selected = selected.filter(name => whitelist.includes(name));
  }
  state.settings.bridge_tables = selected;
  state.settings.bridge_setup = state.settings.bridge_setup || {};
  state.settings.bridge_setup.tables = whitelist;
  updateAdminTableSelects(whitelist, selected);
}

function updateAdminTableSelects(availableTables, selectedTables) {
  const selectedSet = new Set(selectedTables);
  const available = availableTables.filter(name => !selectedSet.has(name));
  renderSelect(adminTablesAllSelect, available, 'Keine Tabellen freigegeben.');
  renderSelect(adminTablesSelectedSelect, selectedTables, 'Noch keine Tabellen ausgewaehlt.');
}

function renderSelect(selectEl, list, emptyLabel) {
  if (!selectEl) return;
  selectEl.innerHTML = '';
  if (!list.length) {
    const opt = document.createElement('option');
    opt.textContent = emptyLabel;
    opt.disabled = true;
    selectEl.appendChild(opt);
    return;
  }
  list.forEach(name => {
    const opt = document.createElement('option');
    opt.value = name;
    opt.textContent = name;
    selectEl.appendChild(opt);
  });
}

function getSelectedOptions(selectEl) {
  if (!selectEl) return [];
  return Array.from(selectEl.selectedOptions || []).map(opt => opt.value);
}

function addAdminTables(list) {
  const whitelist = normalizeTableList(state.settings.bridge_setup?.tables || []);
  if (!whitelist.length) return;
  const selected = normalizeTableList(state.settings.bridge_tables || []);
  const merged = normalizeTableList([...selected, ...list]).filter(name => whitelist.includes(name));
  state.settings.bridge_tables = merged;
  updateAdminTableSelects(whitelist, merged);
}

function removeAdminTables(list) {
  const whitelist = normalizeTableList(state.settings.bridge_setup?.tables || []);
  if (!whitelist.length) return;
  const removeSet = new Set(list);
  const next = normalizeTableList(state.settings.bridge_tables || []).filter(name => !removeSet.has(name));
  state.settings.bridge_tables = next;
  updateAdminTableSelects(whitelist, next);
}

async function loadUsers() {
  try {
    const res = await apiAction('account.users.list', { method: 'GET' });
    if (!res?.ok) throw new Error(res?.error || 'Team konnte nicht geladen werden');
    state.users = res.items || [];
    state.userMap = new Map(state.users.map(u => [u.id, u]));
    renderUserList();
  } catch (err) {
    toast(err.message || 'Fehler beim Laden der Nutzer', false);
  }
}

function renderUserList() {
  if (!teamTable) return;
  const tbody = teamTable.querySelector('tbody');
  if (!tbody) return;
  if (!state.users.length) {
    tbody.innerHTML = '<tr><td colspan="5" class="text-sm text-slate-500">Keine Nutzer vorhanden.</td></tr>';
    return;
  }
  tbody.innerHTML = state.users.map(user => {
    const badge = user.is_active ? '<span class="badge bg-green-100 text-green-800">Aktiv</span>' : '<span class="badge bg-slate-200 text-slate-700">Inaktiv</span>';
    return `<tr>
      <td>${escapeHtml(user.name)}</td>
      <td>${escapeHtml(user.email)}</td>
      <td>${escapeHtml(user.role)}</td>
      <td>${badge}</td>
      <td class="text-right flex gap-2 justify-end">
        <button class="btn" data-user-action="edit" data-user-id="${user.id}">Bearbeiten</button>
        <button class="btn" data-user-action="reset" data-user-id="${user.id}">Passwort</button>
        <button class="btn btn-danger" data-user-action="delete" data-user-id="${user.id}">Löschen</button>
      </td>
    </tr>`;
  }).join('');
}

function handleTeamTableClick(ev) {
  const btn = ev.target.closest('button[data-user-action]');
  if (!btn) return;
  const id = Number(btn.getAttribute('data-user-id'));
  const action = btn.getAttribute('data-user-action');
  const user = state.userMap.get(id);
  if (!user) return;
  if (action === 'edit') {
    openUserForm(user);
  } else if (action === 'delete') {
    if (confirm(`Soll ${user.name} wirklich entfernt werden?`)) deleteUser(id);
  } else if (action === 'reset') {
    openUserForm(user, true);
  }
}

function openUserForm(user = null, resetOnly = false) {
  if (!userForm) return;
  userForm.classList.remove('hidden');
  userForm.user_id.value = user?.id || '';
  userForm.name.value = user?.name || '';
  userForm.email.value = user?.email || '';
  userForm.role.value = user?.role || 'user';
  userForm.is_active.checked = user ? !!user.is_active : true;
  const resetRow = userForm.querySelector('.reset-only');
  if (resetRow) resetRow.classList.toggle('hidden', !user);
  if (resetRow) resetRow.querySelector('input').checked = resetOnly;
}

function closeUserForm() {
  if (!userForm) return;
  userForm.classList.add('hidden');
  userForm.reset();
  userForm.user_id.value = '';
  const resetInput = userForm.querySelector('.reset-only input');
  if (resetInput) resetInput.checked = false;
}

async function submitUserForm(ev) {
  ev.preventDefault();
  const formData = new FormData(userForm);
  const payload = {
    name: formData.get('name')?.toString().trim() || '',
    email: formData.get('email')?.toString().trim() || '',
    role: formData.get('role')?.toString() || 'user',
    is_active: userForm.is_active.checked ? 1 : 0,
  };
  const userId = formData.get('user_id')?.toString();
  let action = 'account.users.create';
  if (userId) {
    action = 'account.users.update';
    payload.user_id = Number(userId);
    payload.reset_password = userForm.querySelector('input[name="reset_password"]').checked ? 1 : 0;
  }
  try {
    const res = await apiAction(action, { method: 'POST', data: payload });
    if (!res?.ok) throw new Error(res?.error || 'Speichern fehlgeschlagen');
    closeUserForm();
    await loadUsers();
    toast('Nutzer gespeichert', true);
    if (res.temp_password) {
      copyToClipboard(res.temp_password);
      alert(`Neues Passwort: ${res.temp_password}`);
    }
  } catch (err) {
    toast(err.message || 'Fehler beim Speichern', false);
  }
}

async function deleteUser(userId) {
  try {
    const res = await apiAction('account.users.delete', { method: 'POST', data: { user_id: userId } });
    if (!res?.ok) throw new Error(res?.error || 'Löschen fehlgeschlagen');
    await loadUsers();
    toast('Nutzer gelöscht', true);
  } catch (err) {
    toast(err.message || 'Fehler beim Löschen', false);
  }
}

function copyToClipboard(value) {
  if (navigator.clipboard?.writeText) {
    navigator.clipboard.writeText(value).catch(() => {});
  }
}

async function loadSenders() {
  if (!senderTable) return;
  try {
    const res = await apiAction('account.senders.list', { method: 'GET' });
    if (!res?.ok) throw new Error(res?.error || 'Absender konnten nicht geladen werden');
    state.senders = res.items || [];
    state.senderMap = new Map(state.senders.map(item => [item.id, item]));
    renderSenderList();
  } catch (err) {
    toast(err.message || 'Fehler beim Laden der Absender', false);
  }
}

function renderSenderList() {
  if (!senderTable) return;
  const tbody = senderTable.querySelector('tbody');
  if (!tbody) return;
  if (!state.senders.length) {
    tbody.innerHTML = '<tr><td colspan="5" class="text-sm text-slate-500">Keine Absender vorhanden.</td></tr>';
    return;
  }
  tbody.innerHTML = state.senders.map(sender => `
    <tr>
      <td>${escapeHtml(sender.label || sender.from_name || sender.from_email)}</td>
      <td>${escapeHtml(sender.from_name || '—')}</td>
      <td>${escapeHtml(sender.from_email)}</td>
      <td>${escapeHtml(sender.reply_to || '')}</td>
      <td class="text-right flex gap-2 justify-end">
        <button class="btn" data-sender-action="edit" data-sender-id="${sender.id}">Bearbeiten</button>
        <button class="btn btn-danger" data-sender-action="delete" data-sender-id="${sender.id}">Löschen</button>
      </td>
    </tr>
  `).join('');
}

function handleSenderTableClick(ev) {
  const btn = ev.target.closest('button[data-sender-action]');
  if (!btn) return;
  const id = Number(btn.getAttribute('data-sender-id'));
  const action = btn.getAttribute('data-sender-action');
  const sender = state.senderMap.get(id);
  if (!sender) return;
  if (action === 'edit') {
    openSenderForm(sender);
  } else if (action === 'delete') {
    if (confirm(`Absender "${sender.label || sender.from_email}" wirklich löschen?`)) {
      deleteSender(id);
    }
  }
}

function openSenderForm(sender = null) {
  if (!senderForm) return;
  senderForm.classList.remove('hidden');
  senderForm.sender_id.value = sender?.id || '';
  senderForm.label.value = sender?.label || '';
  senderForm.from_name.value = sender?.from_name || '';
  senderForm.from_email.value = sender?.from_email || '';
  senderForm.reply_to.value = sender?.reply_to || '';
}

function closeSenderForm() {
  if (!senderForm) return;
  senderForm.classList.add('hidden');
  senderForm.reset();
  senderForm.sender_id.value = '';
}

async function submitSenderForm(ev) {
  ev.preventDefault();
  if (!senderForm) return;
  const payload = {
    sender_id: senderForm.sender_id.value ? Number(senderForm.sender_id.value) : undefined,
    label: senderForm.label.value.trim(),
    from_name: senderForm.from_name.value.trim(),
    from_email: senderForm.from_email.value.trim(),
    reply_to: senderForm.reply_to.value.trim(),
  };
  if (!payload.from_email) {
    toast('Bitte eine Absenderadresse angeben', false);
    return;
  }
  try {
    const res = await apiAction('account.senders.save', { method: 'POST', data: payload });
    if (!res?.ok) throw new Error(res?.error || 'Speichern fehlgeschlagen');
    closeSenderForm();
    await loadSenders();
    toast('Absender gespeichert', true);
  } catch (err) {
    toast(err.message || 'Fehler beim Speichern', false);
  }
}

async function deleteSender(senderId) {
  try {
    const res = await apiAction('account.senders.delete', { method: 'POST', data: { sender_id: senderId } });
    if (!res?.ok) throw new Error(res?.error || 'Löschen fehlgeschlagen');
    await loadSenders();
    toast('Absender gelöscht', true);
  } catch (err) {
    toast(err.message || 'Fehler beim Löschen', false);
  }
}

function escapeHtml(str) {
  return String(str || '')
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}

function refreshDebugAccess() {
  const allowed = (window.__currentUser?.email || '').toLowerCase() === DEBUG_EMAIL;
  if (!allowed) {
    debugButton?.remove();
    debugButton = null;
    if (debugDialog?.open) {
      debugDialog.close();
    }
    return;
  }
  ensureDebugStyles();
  ensureConsoleCapture();
  ensureDebugDialog();
  if (!debugButton) {
    debugButton = document.createElement('button');
    debugButton.id = 'debugToggleButton';
    debugButton.className = 'debug-floating-btn';
    debugButton.type = 'button';
    debugButton.textContent = 'Debug';
    debugButton.addEventListener('click', () => openDebugDialog('php'));
    document.body.appendChild(debugButton);
  }
}

function ensureDebugStyles() {
  if (debugStylesInjected) return;
  const style = document.createElement('style');
  style.id = 'debugStyles';
  style.textContent = `
    .debug-floating-btn{position:fixed;left:16px;bottom:16px;padding:.5rem 1rem;border-radius:999px;border:none;background:#0ea5e9;color:#fff;font-weight:600;box-shadow:0 10px 25px rgba(15,23,42,.25);z-index:60;cursor:pointer}
    .debug-floating-btn:hover{background:#0284c7}
    dialog#debugDialog::backdrop{background:rgba(15,23,42,.45)}
    #debugDialog{border:none;border-radius:1rem;padding:0;width:80vw;max-width:960px}
    .debug-shell{display:flex;flex-direction:column;height:80vh}
    .debug-header{display:flex;align-items:center;justify-content:space-between;padding:1rem;border-bottom:1px solid #e2e8f0}
    .debug-tabs{display:flex;border-bottom:1px solid #e2e8f0}
    .debug-tabs button{flex:1;padding:.75rem 1rem;border:none;background:transparent;cursor:pointer;font-weight:600}
    .debug-tabs button.active{background:#e0f2fe;color:#0c4a6e}
    .debug-panel{flex:1;overflow:auto;padding:1rem;background:#f8fafc}
    #debugConsoleContent{font-family:monospace;font-size:.85rem;white-space:pre-wrap}
    .debug-console-entry{margin-bottom:.35rem}
    .debug-console-entry.log{color:#15803d}
    .debug-console-entry.warn{color:#b45309}
    .debug-console-entry.error{color:#b91c1c}
  `;
  document.head.appendChild(style);
  debugStylesInjected = true;
}

function ensureDebugDialog() {
  if (debugDialog) return;
  debugDialog = document.createElement('dialog');
  debugDialog.id = 'debugDialog';
  debugDialog.innerHTML = `
    <div class="debug-shell bg-white rounded-2xl shadow-2xl">
      <div class="debug-header">
        <strong>Debug Tools</strong>
        <button type="button" class="btn" data-debug-close>Schließen</button>
      </div>
      <div class="debug-tabs">
        <button type="button" data-debug-tab="php" class="active">PHP Debug</button>
        <button type="button" data-debug-tab="console">Console</button>
      </div>
      <div class="debug-panel" data-debug-panel="php">
        <div id="debugPhpContent" class="text-sm text-slate-700">Lade Daten…</div>
      </div>
      <div class="debug-panel hidden" data-debug-panel="console">
        <pre id="debugConsoleContent"></pre>
      </div>
    </div>`;
  document.body.appendChild(debugDialog);
  phpInfoContainer = debugDialog.querySelector('#debugPhpContent');
  consoleContainer = debugDialog.querySelector('#debugConsoleContent');
  debugDialog.querySelector('[data-debug-close]')?.addEventListener('click', () => closeDebugDialog());
  debugDialog.addEventListener('close', () => setDebugTab('php'));
  debugDialog.querySelectorAll('[data-debug-tab]').forEach(btn => {
    btn.addEventListener('click', () => setDebugTab(btn.getAttribute('data-debug-tab')));
  });
}

function openDebugDialog(tab = 'php') {
  ensureDebugDialog();
  setDebugTab(tab);
  if (!debugDialog.open) debugDialog.showModal();
  if (tab === 'php') {
    loadPhpInfo();
  } else {
    renderConsolePanel();
  }
}

function closeDebugDialog() {
  if (debugDialog?.open) debugDialog.close();
}

function setDebugTab(tab) {
  if (!debugDialog) return;
  debugActiveTab = tab || 'php';
  debugDialog.querySelectorAll('[data-debug-tab]').forEach(btn => {
    const isActive = btn.getAttribute('data-debug-tab') === debugActiveTab;
    btn.classList.toggle('active', isActive);
  });
  debugDialog.querySelectorAll('[data-debug-panel]').forEach(panel => {
    panel.classList.toggle('hidden', panel.getAttribute('data-debug-panel') !== debugActiveTab);
  });
  if (debugActiveTab === 'php') {
    loadPhpInfo();
  } else {
    renderConsolePanel();
  }
}

async function loadPhpInfo() {
  if (debugPhpLoaded || debugPhpLoading || !phpInfoContainer) return;
  debugPhpLoading = true;
  phpInfoContainer.textContent = 'Lade phpinfo…';
  try {
    const res = await apiAction('debug.phpinfo', { method: 'GET' });
    if (!res?.ok) throw new Error(res?.error || 'Fehler beim Laden');
    const frame = document.createElement('iframe');
    frame.style.width = '100%';
    frame.style.height = '100%';
    frame.style.minHeight = '400px';
    frame.style.border = 'none';
    frame.srcdoc = res.html || '<p>Keine Daten</p>';
    phpInfoContainer.innerHTML = '';
    phpInfoContainer.appendChild(frame);
    debugPhpLoaded = true;
  } catch (err) {
    phpInfoContainer.textContent = err.message || 'Fehler beim Laden';
  } finally {
    debugPhpLoading = false;
  }
}

function renderConsolePanel() {
  if (!consoleContainer) return;
  if (!consoleBuffer.length) {
    consoleContainer.textContent = 'Noch keine Konsolenmeldungen in dieser Sitzung.';
    return;
  }
  const lines = consoleBuffer.map(entry => {
    const time = entry.time.toLocaleTimeString();
    return `<div class="debug-console-entry ${entry.type}">[${time}] ${escapeHtml(entry.text)}</div>`;
  });
  consoleContainer.innerHTML = lines.join('');
}

function ensureConsoleCapture() {
  if (consolePatched) return;
  ['log', 'warn', 'error'].forEach(type => {
    const original = console[type];
    console[type] = function (...args) {
      appendConsoleMessage(type, args);
      if (typeof original === 'function') {
        original.apply(console, args);
      }
    };
  });
  consolePatched = true;
}

function appendConsoleMessage(type, args) {
  const text = args.map(formatConsoleArg).join(' ');
  consoleBuffer.push({ type, text, time: new Date() });
  if (consoleBuffer.length > MAX_CONSOLE_LINES) consoleBuffer.shift();
  if (debugActiveTab === 'console' && debugDialog?.open) {
    renderConsolePanel();
  }
}

function formatConsoleArg(arg) {
  if (typeof arg === 'string') return arg;
  try {
    return JSON.stringify(arg);
  } catch (err) {
    return String(arg);
  }
}

function reportViewDebugInfo(apiResponse) {
  const role = (window.__currentUser?.role || '').toLowerCase() || 'unknown';
  const expected = {
    profile: true,
    dashboard: role === 'owner' || role === 'admin',
    administration: role === 'owner' || role === 'admin',
    downloads: role === 'owner',
  };
  const summary = {
    hasUser: !!apiResponse?.user,
    userRole: apiResponse?.user?.role ?? null,
    settingsKeys: apiResponse?.settings ? Object.keys(apiResponse.settings) : [],
    usersCount: Array.isArray(state.users) ? state.users.length : null,
    sendersCount: Array.isArray(state.senders) ? state.senders.length : null,
    requestedTab: state.currentTab,
  };
  console.log('[view-debug]', { expectedViews: expected, role, apiSummary: summary });
}