document.documentElement.classList.add('js');

function readThemePreference(key, fallback) {
  try {
    return localStorage.getItem(key) || fallback;
  } catch (error) {
    return fallback;
  }
}

const moduleName = document.documentElement.dataset.module || '';
const mainThemeMode = readThemePreference('nexus.theme', 'day');
const mainThemeAccent = readThemePreference('nexus.accent', 'logo');
const moduleThemeMode = moduleName ? readThemePreference(`nexus.module.${moduleName}.theme`, 'inherit') : mainThemeMode;
const moduleThemeAccent = moduleName ? readThemePreference(`nexus.module.${moduleName}.accent`, 'inherit') : mainThemeAccent;

function normalizeThemeValue(value, allowed, fallback) {
  return allowed.includes(value) ? value : fallback;
}

function storedTheme() {
  const rawMode = moduleName ? readThemePreference(`nexus.module.${moduleName}.theme`, 'inherit') : readThemePreference('nexus.theme', 'day');
  const rawAccent = moduleName ? readThemePreference(`nexus.module.${moduleName}.accent`, 'inherit') : readThemePreference('nexus.accent', 'logo');
  const mode = moduleName ? normalizeThemeValue(rawMode, ['inherit', 'day', 'night'], 'inherit') : normalizeThemeValue(rawMode, ['day', 'night'], 'day');
  const accent = moduleName ? normalizeThemeValue(rawAccent, ['inherit', 'logo', 'pink', 'cyan', 'orange', 'green'], 'inherit') : normalizeThemeValue(rawAccent, ['logo', 'pink', 'cyan', 'orange', 'green'], 'logo');
  return { mode, accent };
}

function applyTheme(mode, accent, persist = true) {
  const allowedModes = moduleName ? ['inherit', 'day', 'night'] : ['day', 'night'];
  const allowedAccents = moduleName ? ['inherit', 'logo', 'pink', 'cyan', 'orange', 'green'] : ['logo', 'pink', 'cyan', 'orange', 'green'];
  const normalizedMode = normalizeThemeValue(mode, allowedModes, moduleName ? 'inherit' : 'day');
  const normalizedAccent = normalizeThemeValue(accent, allowedAccents, moduleName ? 'inherit' : 'logo');
  const effectiveMode = normalizedMode === 'inherit' ? mainThemeMode : normalizedMode;
  const effectiveAccent = normalizedAccent === 'inherit' ? mainThemeAccent : normalizedAccent;
  document.documentElement.dataset.theme = effectiveMode;
  document.documentElement.dataset.accent = effectiveAccent;
  try {
    if (persist) {
      if (moduleName) {
        if (normalizedMode === 'inherit') {
          localStorage.removeItem(`nexus.module.${moduleName}.theme`);
        } else {
          localStorage.setItem(`nexus.module.${moduleName}.theme`, normalizedMode);
        }
        if (normalizedAccent === 'inherit') {
          localStorage.removeItem(`nexus.module.${moduleName}.accent`);
        } else {
          localStorage.setItem(`nexus.module.${moduleName}.accent`, normalizedAccent);
        }
      } else {
        localStorage.setItem('nexus.theme', normalizedMode);
        localStorage.setItem('nexus.accent', normalizedAccent);
      }
    }
  } catch (error) {
    // Ignore blocked storage; the current page still receives the theme.
  }
  return { mode: normalizedMode, accent: normalizedAccent };
}

const initialTheme = applyTheme(moduleThemeMode, moduleThemeAccent, false);

const themeModeSelect = document.querySelector('[data-theme-mode]');
const themeAccentSelect = document.querySelector('[data-theme-accent]');

if (themeModeSelect) {
  themeModeSelect.value = initialTheme.mode;
  themeModeSelect.addEventListener('change', () => {
    const current = storedTheme();
    applyTheme(themeModeSelect.value, current.accent);
  });
}

if (themeAccentSelect) {
  themeAccentSelect.value = initialTheme.accent;
  themeAccentSelect.addEventListener('change', () => {
    const current = storedTheme();
    applyTheme(current.mode, themeAccentSelect.value);
  });
}

for (const element of document.querySelectorAll('[data-reveal]')) {
  element.classList.add('reveal');
}

const setupTabs = document.querySelectorAll('[data-setup-tab-target]');
if (setupTabs.length > 0) {
  const setupPanels = document.querySelectorAll('.setup-db-panel');
  const setupControls = document.querySelectorAll('.setup-db-panel input, .setup-db-panel select, .setup-db-panel textarea');
  for (const control of setupControls) {
    if (control.required) {
      control.dataset.setupRequired = 'true';
    }
  }

  const activateSetupTab = (targetId) => {
    for (const tab of setupTabs) {
      const isActive = tab.dataset.setupTabTarget === targetId;
      tab.classList.toggle('is-active', isActive);
      tab.setAttribute('aria-selected', isActive ? 'true' : 'false');
    }
    for (const panel of setupPanels) {
      const isActive = panel.id === targetId;
      panel.hidden = !isActive;
      for (const control of panel.querySelectorAll('input, select, textarea')) {
        if (control.dataset.setupRequired === 'true') {
          control.required = isActive;
        }
      }
    }
  };

  for (const tab of setupTabs) {
    tab.addEventListener('click', () => {
      activateSetupTab(tab.dataset.setupTabTarget);
    });
  }

  const activeSetupTab = document.querySelector('[data-setup-tab-target].is-active') || setupTabs[0];
  activateSetupTab(activeSetupTab.dataset.setupTabTarget);
}

window.NexusModal = (() => {
  const openModals = new Set();

  const syncBodyState = () => {
    document.body.classList.toggle('has-modal-open', openModals.size > 0);
  };

  const create = (root, options = {}) => {
    if (!root) {
      return null;
    }

    const modal = {
      root,
      isOpen: () => root.classList.contains('is-open'),
      open() {
        root.classList.add('is-open');
        root.setAttribute('aria-hidden', 'false');
        openModals.add(root);
        syncBodyState();
        if (typeof options.onOpen === 'function') {
          options.onOpen();
        }
        const focusTarget = options.initialFocus ? root.querySelector(options.initialFocus) : null;
        if (focusTarget instanceof HTMLElement) {
          window.setTimeout(() => focusTarget.focus(), 20);
        }
      },
      close() {
        root.classList.remove('is-open');
        root.setAttribute('aria-hidden', 'true');
        openModals.delete(root);
        syncBodyState();
        if (typeof options.onClose === 'function') {
          options.onClose();
        }
      },
    };

    if (!root.dataset.modalBound) {
      root.addEventListener('click', (event) => {
        if (event.target === root) {
          modal.close();
        }
      });
      root.dataset.modalBound = '1';
    }

    return modal;
  };

  document.addEventListener('keydown', (event) => {
    if (event.key !== 'Escape') {
      return;
    }
    const active = Array.from(openModals).pop();
    if (!active) {
      return;
    }
    active.classList.remove('is-open');
    active.setAttribute('aria-hidden', 'true');
    openModals.delete(active);
    syncBodyState();
  });

  return { create };
})();

(() => {
  const root = document.getElementById('nexus-debug-root');
  const dataNode = document.getElementById('nexus-debug-data');
  if (!root || !dataNode) {
    return;
  }

  let payload = { enabled: false, entries: [] };
  try {
    const parsed = JSON.parse(dataNode.textContent || '{}');
    if (parsed && typeof parsed === 'object') {
      payload = parsed;
    }
  } catch (error) {
    payload = { enabled: false, entries: [] };
  }

  const enabled = !!payload.enabled && document.body.dataset.nexusDebugEnabled === '1';
  const isAdmin = document.body.dataset.nexusDebugAdmin === '1';
  const entries = Array.isArray(payload.entries) ? payload.entries.slice(0, 250) : [];
  let sequence = entries.length;

  const debugBus = window.__nexusDebugBus || { enabled: false, listener: null };
  debugBus.enabled = enabled;
  window.__nexusDebugBus = debugBus;

  if (!isAdmin || !enabled) {
    return;
  }

  const bugSvg = '<svg viewBox="0 0 24 24" aria-hidden="true"><path d="M9 4.5h6l1.2 2.2 2.5-1.4 1 1.7-2.4 1.4A6.9 6.9 0 0 1 19 13h2.5v2H19a6.9 6.9 0 0 1-.7 2.9l2.4 1.4-1 1.7-2.5-1.4L15 21.5H9l-1.2-2.2-2.5 1.4-1-1.7 2.4-1.4A6.9 6.9 0 0 1 6 15H3.5v-2H6a6.9 6.9 0 0 1 .7-2.9L4.3 8.7l1-1.7 2.5 1.4L9 4.5Zm1.2 2L9 8.8V15a3 3 0 0 0 6 0V8.8l-1.2-2.3h-3.6ZM10.5 11a1 1 0 1 1 0 2 1 1 0 0 1 0-2Zm3 0a1 1 0 1 1 0 2 1 1 0 0 1 0-2Z" fill="currentColor"/></svg>';

  root.innerHTML = `
    <button type="button" class="nexus-debug-bug" aria-label="Debug öffnen">
      ${bugSvg}
      <span class="nexus-debug-badge">0</span>
    </button>
    <section class="nexus-debug-popup" aria-hidden="true">
      <div class="nexus-debug-popup__head">
        <div>
          <div class="nexus-debug-popup__eyebrow">Nexus Debug</div>
          <h2>Nexus Debug</h2>
        </div>
        <button type="button" class="module-button module-button--secondary module-button--small" data-debug-close>Schließen</button>
      </div>
      <div class="nexus-debug-popup__toolbar">
        <div class="muted">Projektweiter Debug-Stream der aktuellen Admin-Sitzung.</div>
        <div class="nexus-debug-popup__actions">
          <button type="button" class="module-button module-button--secondary module-button--small" data-debug-reload>Neu laden</button>
          <button type="button" class="module-button module-button--secondary module-button--small" data-debug-copy>Kopieren</button>
          <button type="button" class="module-button module-button--secondary module-button--small" data-debug-clear>Leeren</button>
        </div>
      </div>
      <div class="nexus-debug-popup__body" data-debug-list></div>
    </section>
  `;

  const bugButton = root.querySelector('.nexus-debug-bug');
  const badge = root.querySelector('.nexus-debug-badge');
  const popup = root.querySelector('.nexus-debug-popup');
  const closeButton = root.querySelector('[data-debug-close]');
  const reloadButton = root.querySelector('[data-debug-reload]');
  const copyButton = root.querySelector('[data-debug-copy]');
  const clearButton = root.querySelector('[data-debug-clear]');
  const list = root.querySelector('[data-debug-list]');

  const updateBadge = () => {
    if (!badge) {
      return;
    }
    badge.textContent = String(entries.length);
    badge.hidden = entries.length === 0;
  };

  const normalizeEntry = (entry) => {
    sequence += 1;
    return {
      id: entry && entry.id ? entry.id : `nexus-debug-${sequence}`,
      source: entry && entry.source ? String(entry.source) : 'nexus',
      type: entry && entry.type ? String(entry.type) : 'debug',
      label: entry && entry.label ? String(entry.label) : '',
      at: entry && (entry.at || entry.time) ? String(entry.at || entry.time) : new Date().toISOString(),
      payload: entry && typeof entry === 'object' ? entry : { value: entry },
    };
  };

  const renderEntries = () => {
    if (!list) {
      return;
    }
    updateBadge();
    if (!entries.length) {
      list.innerHTML = '<div class="nexus-debug-empty">Noch keine Debug-Einträge vorhanden.</div>';
      return;
    }

    list.innerHTML = entries.map((entry, index) => {
      const title = entry.label || entry.type || `Eintrag ${index + 1}`;
      const payloadText = JSON.stringify(entry.payload, null, 2);
      return `
        <details class="nexus-debug-entry"${index === 0 ? ' open' : ''}>
          <summary>
            <span class="nexus-debug-entry__title">
              <strong>${escapeHtml(title)}</strong>
              <span class="nexus-debug-entry__meta">${escapeHtml(entry.source)} · ${escapeHtml(entry.at)}</span>
            </span>
            <button type="button" class="module-button module-button--secondary module-button--small nexus-debug-entry__copy" data-entry-copy="${escapeHtml(entry.id)}">Kopieren</button>
          </summary>
          <pre>${escapeHtml(payloadText)}</pre>
        </details>
      `;
    }).join('');
  };

  const escapeHtml = (value) => String(value ?? '')
    .replaceAll('&', '&amp;')
    .replaceAll('<', '&lt;')
    .replaceAll('>', '&gt;')
    .replaceAll('"', '&quot;')
    .replaceAll("'", '&#039;');

  const copyText = async (text, successLabel, errorLabel) => {
    try {
      if (navigator.clipboard && navigator.clipboard.writeText) {
        await navigator.clipboard.writeText(text);
      } else {
        const textarea = document.createElement('textarea');
        textarea.value = text;
        textarea.setAttribute('readonly', 'readonly');
        textarea.style.position = 'absolute';
        textarea.style.left = '-9999px';
        document.body.appendChild(textarea);
        textarea.select();
        document.execCommand('copy');
        document.body.removeChild(textarea);
      }
      appendEntry({
        source: 'nexus',
        type: 'debug.copy.success',
        label: successLabel,
      });
    } catch (error) {
      appendEntry({
        source: 'nexus',
        type: 'debug.copy.error',
        label: errorLabel,
        message: error && error.message ? error.message : 'Kopieren fehlgeschlagen.',
      });
    }
  };

  const openPopup = () => {
    popup?.classList.add('is-open');
    popup?.setAttribute('aria-hidden', 'false');
  };

  const closePopup = () => {
    popup?.classList.remove('is-open');
    popup?.setAttribute('aria-hidden', 'true');
  };

  const appendEntry = (entry) => {
    entries.unshift(normalizeEntry(entry));
    if (entries.length > 250) {
      entries.length = 250;
    }
    renderEntries();
  };

  const reloadEntries = async () => {
    try {
      const response = await fetch('/api/debug/entries', {
        credentials: 'same-origin',
        headers: { Accept: 'application/json' },
      });
      const data = await response.json().catch(() => ({}));
      const nextEntries = Array.isArray(data?.data?.entries) ? data.data.entries.map(normalizeEntry) : [];
      entries.splice(0, entries.length, ...nextEntries);
      renderEntries();
    } catch (error) {
      appendEntry({
        source: 'nexus',
        type: 'debug.reload.error',
        label: 'Reload fehlgeschlagen',
        message: error && error.message ? error.message : 'Debug-Einträge konnten nicht geladen werden.',
      });
    }
  };

  const clearEntries = async () => {
    try {
      await fetch('/api/debug/clear', {
        method: 'POST',
        credentials: 'same-origin',
        headers: { Accept: 'application/json' },
      });
    } catch (error) {
      // Ignore clear failures; local UI is still reset below.
    }
    entries.splice(0, entries.length);
    renderEntries();
  };

  const copyAllEntries = async () => {
    const content = entries
      .slice()
      .reverse()
      .map((entry) => JSON.stringify(entry.payload, null, 2))
      .join('\n\n');
    if (!content) {
      appendEntry({
        source: 'nexus',
        type: 'debug.copy.empty',
        label: 'Keine Debug-Einträge zum Kopieren',
      });
      return;
    }
    await copyText(content, 'Debug-Einträge kopiert', 'Debug-Einträge konnten nicht kopiert werden');
  };

  const previousListener = typeof debugBus.listener === 'function' ? debugBus.listener : null;
  debugBus.listener = (entry) => {
    if (previousListener) {
      previousListener(entry);
    }
    appendEntry(entry);
  };

  bugButton?.addEventListener('click', () => {
    if (popup?.classList.contains('is-open')) {
      closePopup();
    } else {
      openPopup();
    }
  });
  closeButton?.addEventListener('click', closePopup);
  reloadButton?.addEventListener('click', reloadEntries);
  copyButton?.addEventListener('click', copyAllEntries);
  clearButton?.addEventListener('click', clearEntries);
  list?.addEventListener('click', (event) => {
    const button = event.target instanceof HTMLElement ? event.target.closest('[data-entry-copy]') : null;
    if (!button) {
      return;
    }
    const entryId = button.getAttribute('data-entry-copy') || '';
    const entry = entries.find((item) => String(item.id) === entryId);
    if (!entry) {
      return;
    }
    const content = JSON.stringify(entry.payload, null, 2);
    copyText(content, `Eintrag ${entry.type || entry.id} kopiert`, `Eintrag ${entry.type || entry.id} konnte nicht kopiert werden`);
  });

  document.addEventListener('keydown', (event) => {
    if (event.key === 'Escape') {
      closePopup();
    }
  });

  renderEntries();
})();