// ========================================
// Paraguay LLC & SRL — Main JS
// ========================================

const API_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/login';
const NEWSLETTER_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/newsletter';
const USER_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/user';
const PROFILE_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/profile';
const WIKI_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/wiki';
const COMMUNITY_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/community';
const SCHEDULE_URL = 'https://n8n.odoo4projects.com/webhook/paraguay/schedule';

let currentLang = 'de';
let revealObserver = null;

document.addEventListener('DOMContentLoaded', () => {
  currentLang = document.body.dataset.lang || 'de';
  checkSession();
  loadCommunityStats();
  initCalendar();
  
  // Smooth scroll nav links
  document.querySelectorAll('.nav-link').forEach(link => {
    link.addEventListener('click', (e) => {
      e.preventDefault();
      const target = document.querySelector(link.getAttribute('href'));
      if (target) {
        target.scrollIntoView({ behavior: 'smooth' });
      }
      // Close mobile nav
      document.getElementById('nav-menu').classList.remove('open');
    });
  });

  // Mobile nav toggle
  const navToggle = document.getElementById('nav-toggle');
  const navMenu = document.getElementById('nav-menu');
  if (navToggle) {
    navToggle.addEventListener('click', () => {
      navMenu.classList.toggle('open');
    });
  }

  // Navbar scroll effect
  window.addEventListener('scroll', () => {
    const nav = document.getElementById('main-nav');
    if (nav) {
      nav.classList.toggle('scrolled', window.scrollY > 20);
    }
  });

  // Language toggle
  document.querySelectorAll('.lang-btn').forEach(btn => {
    btn.addEventListener('click', () => {
      const lang = btn.dataset.lang;
      setLanguage(lang);
      // Reload content in new language
      if (isLoggedIn) {
        if (document.querySelector('.notebook') || document.getElementById('members-list')) loadUsers();
        if (document.getElementById('wiki-grid')) loadWiki();
      }
    });
  });

  // Member search
  const memberSearch = document.getElementById('member-search');
  if (memberSearch) {
    memberSearch.addEventListener('input', (e) => {
      filterMembers(e.target.value);
    });
  }

  // Wiki search
  const wikiSearch = document.getElementById('wiki-search');
  if (wikiSearch) {
    wikiSearch.addEventListener('input', (e) => {
      searchWiki(e.target.value);
    });
  }

  // Close modals on overlay click
  document.querySelectorAll('.modal-overlay').forEach(overlay => {
    overlay.addEventListener('click', (e) => {
      if (e.target === overlay) {
        overlay.classList.remove('active');
      }
    });
  });

  // Close modals on Escape
  document.addEventListener('keydown', (e) => {
    if (e.key === 'Escape') {
      document.querySelectorAll('.modal-overlay.active').forEach(m => m.classList.remove('active'));
    }
  });

  // Login button — opens Telegram bot deep-link, then locks itself
  const loginBtn = document.getElementById('login-btn');
  if (loginBtn) {
    loginBtn.addEventListener('click', () => {
      // No modal: swap label, drop the link, make the button unclickable
      loginBtn.innerHTML = 'Approve in Telegram';
      loginBtn.removeAttribute('href');
      loginBtn.classList.add('btn-locked');
    });
  }

  // ========================================
  // SCROLL-TRIGGERED ANIMATIONS
  // ========================================
  // Fade-in sections on scroll (Intersection Observer)
  initScrollReveal();

  // Ripple effect on buttons
  initRippleEffects();

  // Fade in hero image (prevents blink)
  initHeroImageFade();
});

// ========================================
// HERO IMAGE FADE IN — prevents blink
// ========================================
function initHeroImageFade() {
  const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  const heroImage = document.querySelector('.hero-image');
  if (!heroImage) return;

  if (prefersReducedMotion) {
    heroImage.classList.add('loaded');
    return;
  }

  if (heroImage.complete && heroImage.naturalHeight > 0) {
    requestAnimationFrame(() => heroImage.classList.add('loaded'));
    return;
  }

  heroImage.addEventListener('load', () => requestAnimationFrame(() => heroImage.classList.add('loaded')), { once: true });
  heroImage.addEventListener('error', () => requestAnimationFrame(() => heroImage.classList.add('loaded')), { once: true });
}

// ========================================
// SCROLL REVEAL (Intersection Observer)
// ========================================
function initScrollReveal() {
  // Respect reduced motion preference
  const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (prefersReducedMotion) return;

  const observerOptions = {
    root: null,
    rootMargin: '0px 0px -60px 0px',
    threshold: 0.1
  };

  const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        entry.target.classList.add('visible');
        observer.unobserve(entry.target); // Only animate once
      }
    });
  }, observerOptions);

  // Keep a handle so dynamically rendered cards (members, wiki, dates) can be observed too
  revealObserver = observer;

  // Observe all sections for reveal animation
  document.querySelectorAll('.section, .telegram-banner, #newsletter-section').forEach(section => {
    section.style.opacity = '0';
    section.style.transform = 'translateY(20px)';
    section.style.transition = 'opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1)';
    observer.observe(section);
  });

  // Observe individual interactive elements for staggered reveals
  const staggerElements = [
    '.section-title',
    '.stat',
    '.about-card',
    '.wiki-card-new',
    '.member-card',
    '.date-card',
    '.newsletter-card',
    '.calendar-card',
    '.btn-cta',
    '.hero-title',
    '.hero-subtitle'
  ];

  staggerElements.forEach(selector => {
    document.querySelectorAll(selector).forEach(el => {
      el.style.opacity = '0';
      el.style.transition = 'opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1)';
      observer.observe(el);
    });
  });

  // Hero elements fade in on load (not scroll)
  if (window.location.hash === '' || window.location.hash === '#hero') {
    document.querySelectorAll('.hero-title, .hero-subtitle, .btn-cta').forEach((el, i) => {
      setTimeout(() => {
        el.classList.add('visible');
        el.style.opacity = '';
        el.style.transform = '';
      }, 300 + i * 150);
    });
    // Also observe hero stats
    document.querySelectorAll('.stat').forEach((el, i) => {
      setTimeout(() => {
        el.classList.add('visible');
        el.style.opacity = '';
        el.style.transform = '';
      }, 400 + i * 100);
    });
  }
}

// ========================================
// REVEAL OBSERVER FOR DYNAMICALLY RENDERED CARDS
// Cards loaded via webhooks (members, wiki, dates) are created AFTER
// initScrollReveal() ran, so they were never observed -> stuck at opacity 0.
// ========================================
function observeRevealCards(container) {
  const els = (container || document).querySelectorAll('.wiki-card-new, .member-card, .date-card, .newsletter-card, .calendar-card');
  if (!revealObserver) {
    // Reduced-motion (observer never created) or init missed: show immediately
    els.forEach(el => el.classList.add('visible'));
    return;
  }
  els.forEach(el => revealObserver.observe(el));
}

// ========================================
// RIPPLE EFFECT ON BUTTONS
// ========================================
function initRippleEffects() {
  document.querySelectorAll('.btn, .lang-btn').forEach(btn => {
    btn.addEventListener('click', function(e) {
      const rect = this.getBoundingClientRect();
      const x = e.clientX - rect.left;
      const y = e.clientY - rect.top;

      const ripple = document.createElement('span');
      ripple.style.cssText = `
        position: absolute;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.4);
        width: 0;
        height: 0;
        left: ${x}px;
        top: ${y}px;
        transform: translate(-50%, -50%);
        pointer-events: none;
        animation: rippleExpand 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
      `;
      this.style.position = this.style.position || 'relative';
      this.style.overflow = 'hidden';
      this.appendChild(ripple);
      setTimeout(() => ripple.remove(), 600);
    });
  });
}

// ========================================
// LANGUAGE
// ========================================
function setLanguage(lang) {
  currentLang = lang;
  document.body.dataset.lang = lang;
  document.querySelectorAll('.lang-btn').forEach(b => {
    b.classList.toggle('active', b.dataset.lang === lang);
  });
  renderCalendar();
  if (wikiData.length) {
    renderWikiTopics();
    renderWikiPage();
  }
}

function isDE() {
  return currentLang !== 'en';
}

// ========================================
// COMMUNITY STATS
// ========================================
async function loadCommunityStats() {
  try {
    const response = await fetch(COMMUNITY_URL);
    if (!response.ok) throw new Error('Failed to fetch');
    const json = await response.json();
    
    // API returns an array: [{"users": 4, "topics": 27, "posts": 58}]
    const d = Array.isArray(json) ? json[0] : json;
    
    if (d.users !== undefined) {
      animateCounter('stat-members', d.users);
    }
    if (d.posts !== undefined) {
      animateCounter('stat-posts', d.posts);
    }
    if (d.topics !== undefined) {
      animateCounter('stat-wiki', d.topics);
    }
  } catch (error) {
    console.error('Failed to load community stats:', error);
  }
}

function animateCounter(elementId, targetNumber) {
  const element = document.getElementById(elementId);
  if (!element) return;
  
  let current = 0;
  const duration = 1500; // ms
  const steps = 40;
  const increment = targetNumber / steps;
  const stepTime = duration / steps;
  
  const timer = setInterval(() => {
    current += increment;
    if (current >= targetNumber) {
      element.textContent = targetNumber;
      clearInterval(timer);
    } else {
      element.textContent = Math.floor(current);
    }
  }, stepTime);
}

// ========================================
// AUTH / SESSION
// ========================================
let isLoggedIn = false;

function isSessionValid() {
  const sid = getCookie('sessionid');
  return sid.length > 0;
}

function checkSession() {
  isLoggedIn = isSessionValid();
  
  if (isLoggedIn) {
    document.body.dataset.loggedIn = 'true';
    document.getElementById('login-btn').style.display = 'none';
    document.getElementById('logout-btn').style.display = 'inline-flex';
    document.getElementById('profile-btn').style.display = 'inline-flex';
    document.getElementById('telegram-banner').style.display = 'none';
    document.getElementById('main-content').style.display = 'block';
    document.getElementById('newsletter-section').style.display = 'block';
    // Remove locked overlays
    document.querySelectorAll('.section-locked').forEach(el => el.style.display = 'none');
    loadUsers();
    loadWiki();
    loadDates();
  } else {
    document.body.dataset.loggedIn = 'false';
    document.getElementById('login-btn').style.display = 'inline-flex';
    document.getElementById('logout-btn').style.display = 'none';
    document.getElementById('profile-btn').style.display = 'none';
    document.getElementById('telegram-banner').style.display = 'block';
    document.getElementById('main-content').style.display = 'block';
    document.getElementById('newsletter-section').style.display = 'none';
    // Show locked overlays
    document.querySelectorAll('.section-locked').forEach(el => el.style.display = '');
  }
}

// ========================================
// LOGIN MODAL
// ========================================
function openLoginModal() {
  document.getElementById('login-modal-overlay').classList.add('active');
  // Reset to step 1
  document.querySelectorAll('.login-step').forEach(s => s.classList.remove('active'));
  document.getElementById('login-step-1').classList.add('active');
  document.getElementById('telegram-user').value = '';
  document.getElementById('verification-code').value = '';
}

function closeLoginModal() {
  document.getElementById('login-modal-overlay').classList.remove('active');
}

// ========================================
// PROFILE MODAL
// ========================================
function openProfileModal() {
  const sid = getCookie('sessionid');
  if (!sid) { alert('Bitte anmelden.'); return; }
  
  fetch(PROFILE_URL + '?sessionid=' + encodeURIComponent(sid))
    .then(r => r.json())
    .then(user => {
      document.getElementById('profile-username-display').textContent = user.username || '';
      const rank = getRank(user.posts || 0);
      const badge = document.getElementById('profile-rank-badge');
      badge.innerHTML = `<span class="rank-badge rank-${rank.level}">${rank.emoji} ${rank.title}</span>`;
      
      document.getElementById('profile-company').value = user.company || '';
      document.getElementById('profile-email').value = user.email || '';
      document.getElementById('profile-homepage').value = user.homepage || '';
      document.getElementById('profile-image').value = user.image || '';
      document.getElementById('profile-location').value = user.location || '';
      document.getElementById('profile-description').value = user.Description || '';
      document.getElementById('profile-publish').checked = true;
      
      document.getElementById('profile-modal-overlay').classList.add('active');
    })
    .catch(() => alert('Fehler beim Laden des Profils.'));
}

function closeProfileModal() {
  document.getElementById('profile-modal-overlay').classList.remove('active');
}

function saveProfile() {
  const sid = getCookie('sessionid');
  fetch(PROFILE_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      username: document.getElementById('profile-username-display').textContent,
      company: document.getElementById('profile-company').value.trim(),
      email: document.getElementById('profile-email').value,
      homepage: document.getElementById('profile-homepage').value,
      image: document.getElementById('profile-image').value,
      location: document.getElementById('profile-location').value,
      Description: document.getElementById('profile-description').value,
      sessionid: sid,
      publish: document.getElementById('profile-publish').checked
    })
  })
  .then(r => r.ok ? alert('Profil gespeichert!') : alert('Fehler beim Speichern.'))
  .catch(() => alert('Fehler bei der Verbindung.'));
}

// ========================================
// USER DETAIL MODAL
// ========================================
function openUserDetailModal(user) {
  const avatar = document.getElementById('user-detail-avatar');
  const avatarImg = avatar.querySelector('img');
  const avatarInitial = document.getElementById('user-detail-initial');
  if (user.image) {
    if (avatarImg) {
      avatarImg.src = user.image;
      avatarImg.alt = user.username;
      avatarImg.style.display = '';
    } else {
      const img = document.createElement('img');
      img.src = user.image;
      img.alt = user.username;
      img.style.display = '';
      avatar.appendChild(img);
    }
    avatarInitial.textContent = '';
  } else {
    if (avatarImg) avatarImg.style.display = 'none';
    avatarInitial.textContent = (user.username || '?').charAt(0).toUpperCase();
  }
  document.getElementById('user-detail-username').textContent = '@' + (user.username || 'Unknown');
  
  const rank = getRank(user.posts || 0);
  document.getElementById('user-detail-rank-badge').className = `rank-badge rank-${rank.level}`;
  document.getElementById('user-detail-rank-badge').textContent = rank.emoji + ' ' + rank.title;
  
  document.getElementById('user-detail-company').textContent = user.company || '';
  
  const emailEl = document.getElementById('user-detail-email');
  emailEl.innerHTML = user.email ? `<a href="mailto:${user.email}">${user.email}</a>` : '-';
  
  const hpEl = document.getElementById('user-detail-homepage');
  const hp = user.homepage || '';
  hpEl.innerHTML = hp ? `<a href="${hp.startsWith('http') ? '' : 'https://'}${hp}" target="_blank">${hp}</a>` : '-';
  
  document.getElementById('user-detail-location').textContent = user.location || '-';
  document.getElementById('user-detail-description').innerHTML = (user.Description || '-').replace(/\n/g, '<br>');
  
  document.getElementById('user-detail-modal-overlay').classList.add('active');
}

function closeUserDetailModal() {
  document.getElementById('user-detail-modal-overlay').classList.remove('active');
}

// ========================================
// LOGIN FLOW
// ========================================
function sendTelegramUser() {
  const user = document.getElementById('telegram-user').value.trim();
  if (!user) { alert('Bitte geben Sie einen Telegram-Nutzernamen ein.'); return; }
  
  const btn = event.target;
  btn.disabled = true;
  btn.textContent = isDE() ? 'Sende...' : 'Sending...';
  
  fetch(API_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ username: user })
  })
  .then(r => r.json())
  .then(data => {
    if (data.sessionid) {
      setCookie('sessionid', data.sessionid, 1);
      document.getElementById('login-step-1').classList.remove('active');
      document.getElementById('login-step-3').classList.add('active');
    } else if (data.status === 'code send') {
      document.getElementById('login-step-1').classList.remove('active');
      document.getElementById('login-step-2').classList.add('active');
    } else {
      alert(isDE() ? 'Benutzername nicht gefunden. Bitte über Telegram Bot anmelden.' : 'Username not found. Please sign up via Telegram bot.');
    }
  })
  .catch(() => {
    btn.disabled = false;
    alert(isDE() ? 'Verbindungsfehler' : 'Connection error');
  });
}

function verifyCode() {
  const code = document.getElementById('verification-code').value.trim();
  if (!code) { alert('Bitte geben Sie den Code ein.'); return; }
  
  fetch(API_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      username: document.getElementById('telegram-user').value,
      code: code,
      sessionid: getCookie('sessionid')
    })
  })
  .then(r => r.json())
  .then(data => {
    if (data.sessionid) {
      setCookie('sessionid', data.sessionid, 1);
      checkSession();
      closeLoginModal();
    } else {
      alert(isDE() ? 'Ungültiger Code' : 'Invalid code');
    }
  })
  .catch(() => alert(isDE() ? 'Verbindungsfehler' : 'Connection error'));
}

function submitLoginData() {
  const name = document.getElementById('full-name').value.trim();
  const llc = document.getElementById('llc-name').value.trim();
  if (!name || !llc) { alert(isDE() ? 'Bitte Name und LLC eintragen' : 'Please enter name and LLC'); return; }
  
  fetch(API_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      username: document.getElementById('telegram-user').value,
      name: name,
      llc: llc
    })
  })
  .then(r => r.json())
  .then(data => {
    if (data.sessionid) {
      setCookie('sessionid', data.sessionid, 1);
      checkSession();
      closeLoginModal();
    } else {
      alert(isDE() ? 'Registrierung fehlgeschlagen' : 'Registration failed');
    }
  })
  .catch(() => alert(isDE() ? 'Verbindungsfehler' : 'Connection error'));
}

function logout() {
  setCookie('sessionid', '', -1);
  checkSession();
}

// ========================================
// NEWSLETTER
// ========================================
function subscribeNewsletter() {
  const email = document.getElementById('newsletter-email').value.trim();
  if (!email) { alert(isDE() ? 'Bitte E-Mail eingeben' : 'Please enter email'); return; }
  
  fetch(NEWSLETTER_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ email: email })
  })
  .then(r => {
    if (r.ok) {
      document.getElementById('newsletter-form').classList.add('hidden');
      document.getElementById('newsletter-success').classList.remove('hidden');
    } else {
      alert(isDE() ? 'Fehler beim Abonnieren' : 'Error subscribing');
    }
  })
  .catch(() => alert(isDE() ? 'Verbindungsfehler' : 'Connection error'));
}

// ========================================
// USERS / MEMBERS
// ========================================
async function loadUsers() {
  try {
    const response = await fetch(USER_URL);
    if (!response.ok) throw new Error('Failed to fetch');
    const data = await response.json();
    const container = document.getElementById('members-list');
    
    if (data.data && Array.isArray(data.data)) {
      container.innerHTML = '';
      container.style.display = 'grid';
      
      data.data.forEach(user => {
        const card = createMemberCard(user);
        container.appendChild(card);
      });
      observeRevealCards(container);
      
      // Update stats will be handled by loadCommunityStats
    } else {
      container.innerHTML = '<p class="loading-text">' + (isDE() ? 'Keine Mitglieder gefunden' : 'No members found') + '</p>';
    }
  } catch (error) {
    const container = document.getElementById('members-list');
    container.innerHTML = '<p class="loading-text">' + (isDE() ? 'Fehler beim Laden' : 'Error loading') + '</p>';
  }
}

function createMemberCard(user) {
  const card = document.createElement('div');
  card.className = 'member-card';
  card.setAttribute('role', 'button');
  card.setAttribute('tabindex', '0');
  
  const rank = getRank(user.posts || 0);
  const avatarContent = user.image
    ? `<img src="${user.image}" alt="${user.username}" loading="lazy">`
    : `<span class="user-avatar-text">${(user.username || '?').charAt(0).toUpperCase()}</span>`;
  
  card.innerHTML = `
    <div class="user-avatar">${avatarContent}</div>
    <div class="member-info">
      <h4>${user.username || 'N/A'}</h4>
      <p class="member-company">${user.company || ''}</p>
      ${user.location ? `<p class="member-location">📍 ${user.location}</p>` : ''}
      ${user.posts ? `<p class="member-posts">${user.posts} ${isDE() ? 'Beiträge' : 'posts'}</p>` : ''}
      <span class="rank-badge rank-${rank.level}">${rank.emoji} ${rank.title}</span>
    </div>
  `;
  
  card.addEventListener('click', (e) => {
    e.stopPropagation();
    openUserDetailModal(user);
  });
  card.addEventListener('keydown', (e) => {
    if (e.key === 'Enter' || e.key === ' ') {
      e.preventDefault();
      openUserDetailModal(user);
    }
  });
  
  return card;
}

function filterMembers(term) {
  const cards = document.querySelectorAll('.member-card');
  const t = term.toLowerCase();
  cards.forEach(card => {
    const text = card.textContent.toLowerCase();
    card.style.display = text.includes(t) ? 'flex' : 'none';
  });
}

// ========================================
// RANKS
// ========================================
function getRank(posts) {
  if (posts >= 500) return { level: 'legend', title: isDE() ? 'Legende' : 'Legend', emoji: '👑' };
  if (posts >= 200) return { level: 'expert', title: isDE() ? 'Experte' : 'Expert', emoji: '🏆' };
  if (posts >= 100) return { level: 'veteran', title: isDE() ? 'Veteran' : 'Veteran', emoji: '💎' };
  if (posts >= 50) return { level: 'contributor', title: isDE() ? 'Mitwirkender' : 'Contributor', emoji: '⭐' };
  if (posts >= 30) return { level: 'member', title: isDE() ? 'Mitglied' : 'Member', emoji: '🌳' };
  if (posts >= 5) return { level: 'beginner', title: isDE() ? 'Einsteiger' : 'Beginner', emoji: '🌿' };
  return { level: 'rookie', title: isDE() ? 'Anfänger' : 'Rookie', emoji: '🌱' };
}


// ========================================
// TOPIC COLORS — each topic gets a distinct color
// ========================================
const TOPIC_COLORS = {
  '🌎 Internationales Geschäft': { bg: '#E0F2F1', text: '#00695C', border: '#00695C' },
  '🏦 Banken & Finanzen Filialen': { bg: '#E3F2FD', text: '#1565C0', border: '#1565C0' },
  '🏦 Banken & Finanzen allgmein': { bg: '#E8EAF6', text: '#283593', border: '#283593' },
  '💰 Steuern': { bg: '#FFF3E0', text: '#E65100', border: '#E65100' },
  '💻 Software & Digital Operations': { bg: '#EDE7F6', text: '#4527A0', border: '#4527A0' },
  '📑 Buchhaltung': { bg: '#E8F5E9', text: '#2E7D32', border: '#2E7D32' }
};

function getTopicColor(topic) {
  // Try exact match first
  if (TOPIC_COLORS[topic]) return TOPIC_COLORS[topic];
  // Try matching without emoji
  const cleanTopic = topic.replace(/^[^\s]+\s/, '');
  for (const key of Object.keys(TOPIC_COLORS)) {
    const cleanKey = key.replace(/^[^\s]+\s/, '');
    if (cleanTopic === cleanKey) return TOPIC_COLORS[key];
  }
  // Fallback: generate color from topic string
  let hash = 0;
  for (let i = 0; i < topic.length; i++) {
    hash = topic.charCodeAt(i) + ((hash << 5) - hash);
  }
  const hues = [200, 180, 240, 30, 140, 60]; // blue, teal, purple, orange, green, amber
  const idx = Math.abs(hash) % hues.length;
  const color = hues[idx];
  return {
    bg: `hsl(${color}, 70%, 92%)`,
    text: `hsl(${color}, 60%, 35%)`,
    border: `hsl(${color}, 60%, 35%)`
  };
}

// ========================================
// WIKI
// ========================================

// ========================================
let wikiData = [];
let wikiCurrentPage = 1;
let wikiPerPage = 9;
let wikiFilteredData = [];
let wikiActiveTopic = '';

// Get unique topics with counts from the full wiki data
function getWikiTopics(data) {
  const map = {};
  data.forEach(item => {
    const t = currentLang === 'en' && item.topic_en ? item.topic_en : (item.topic || 'Unknown');
    map[t] = (map[t] || 0) + 1;
  });
  return Object.entries(map).sort();
}

async function loadWiki() {
  try {
    const response = await fetch(WIKI_URL);
    if (!response.ok) throw new Error('Failed to fetch');
    const result = await response.json();
    
    if (result.data && Array.isArray(result.data)) {
      wikiData = result.data;
      wikiFilteredData = [...result.data].sort((a, b) => new Date(b.updatedAt || b.createdAt) - new Date(a.updatedAt || a.createdAt));
      wikiCurrentPage = 1;
      wikiActiveTopic = '';
      renderWikiTopics();
      renderWikiPage();
    } else {
      document.getElementById('wiki-grid').innerHTML = '<p class="loading-text">' + (isDE() ? 'Keine Wiki-Daten' : 'No wiki data') + '</p>';
      const c = document.getElementById('wiki-counter'); if (c) c.innerHTML = '';
      const p = document.getElementById('wiki-pagination'); if (p) p.innerHTML = '';
    }
  } catch (error) {
    document.getElementById('wiki-grid').innerHTML = '<p class="loading-text">' + (isDE() ? 'Fehler beim Laden' : 'Error loading') + '</p>';
  }
}

function renderWikiTopics() {
  const container = document.getElementById('wiki-topics');
  if (!container) return;
  const topics = getWikiTopics(wikiData);
  let html = '<button class="wiki-topic-filter' + (wikiActiveTopic === '' ? ' active' : '') + '" onclick="filterWikiByTopic(\'\')">' +
    (isDE() ? 'Alle' : 'All') + ' <span class="wiki-filter-count">' + wikiData.length + '</span></button>';
  topics.forEach(([topic, count]) => {
    const esc = escapeHtml(topic).replace(/'/g, "\\'");
    html += '<button class="wiki-topic-filter' + (topic === wikiActiveTopic ? ' active' : '') + '" onclick="filterWikiByTopic(\'' + esc + '\')">' +
      escapeHtml(topic) + ' <span class="wiki-filter-count">' + count + '</span></button>';
  });
  container.innerHTML = html;
}

function filterWikiByTopic(topic) {
  wikiActiveTopic = topic;
  if (!topic) {
    wikiFilteredData = [...wikiData].sort((a, b) => new Date(b.updatedAt || b.createdAt) - new Date(a.updatedAt || a.createdAt));
  } else {
    wikiFilteredData = [...wikiData].filter(item => {
      const t = currentLang === 'en' && item.topic_en ? item.topic_en : (item.topic || '');
      return t === topic;
    }).sort((a, b) => new Date(b.updatedAt || b.createdAt) - new Date(a.updatedAt || a.createdAt));
  }
  wikiCurrentPage = 1;
  renderWikiTopics();
  renderWikiPage();
}

function renderWikiPage() {
  const total = wikiFilteredData.length;
  const totalPages = Math.max(1, Math.ceil(total / wikiPerPage));
  if (wikiCurrentPage > totalPages) wikiCurrentPage = totalPages;
  const start = (wikiCurrentPage - 1) * wikiPerPage;
  const pageData = wikiFilteredData.slice(start, start + wikiPerPage);
  renderWikiCards(pageData);
  renderWikiCounter(start, total);
  renderWikiPagination(totalPages);
}

function renderWikiCounter(start, total) {
  const el = document.getElementById('wiki-counter');
  if (!el) return;
  if (total === 0 || start >= total) { el.innerHTML = ''; return; }
  const shown = Math.min(wikiPerPage, total - start);
  el.textContent = start + shown + '/' + total;
}

function renderWikiPagination(totalPages) {
  const el = document.getElementById('wiki-pagination');
  if (!el) return;
  if (totalPages <= 1) { el.innerHTML = ''; return; }
  el.innerHTML =
    '<button class="wiki-page-btn" onclick="wikiGoPage(' + (wikiCurrentPage - 1) + ')"' + (wikiCurrentPage <= 1 ? ' disabled' : '') + '>' +
      '<span class="hide-de">Zurück</span><span class="hide-en">Previous</span></button>' +
    '<span class="wiki-page-info">' + wikiCurrentPage + '/' + totalPages + '</span>' +
    '<button class="wiki-page-btn" onclick="wikiGoPage(' + (wikiCurrentPage + 1) + ')"' + (wikiCurrentPage >= totalPages ? ' disabled' : '') + '>' +
      '<span class="hide-de">Weiter</span><span class="hide-en">Next</span></button>';
}

function wikiGoPage(page) {
  const total = wikiFilteredData.length;
  const totalPages = Math.max(1, Math.ceil(total / wikiPerPage));
  if (page < 1 || page > totalPages) return;
  wikiCurrentPage = page;
  const start = (wikiCurrentPage - 1) * wikiPerPage;
  renderWikiCards(wikiFilteredData.slice(start, start + wikiPerPage));
  renderWikiCounter(start, total);
  renderWikiPagination(totalPages);
  const section = document.querySelector('#wiki');
  if (section) section.scrollIntoView({ behavior: 'smooth', block: 'start' });
}

function renderWikiCards(data) {
  const grid = document.getElementById('wiki-grid');
  grid.innerHTML = '';
  
  if (data.length === 0) {
    grid.innerHTML = '<p class="no-results">' + (isDE() ? 'Keine Ergebnisse gefunden' : 'No results found') + '</p>';
    return;
  }
  
  data.forEach((item, idx) => {
    const card = document.createElement('div');
    card.className = 'wiki-card-new stagger-' + (idx % 4 + 1);
    card.setAttribute('role', 'button');
    card.setAttribute('tabindex', '0');
    
    const topic = currentLang === 'en' && item.topic_en ? item.topic_en : (item.topic || 'Unknown');
    const topicColor = getTopicColor(topic);
    card.style.setProperty('--topic-accent', topicColor.border);
    
    const subtopic = currentLang === 'en' && item.subtopic_en ? item.subtopic_en : (item.subtopic || '');
    const content = currentLang === 'en' && item.wiki_en ? item.wiki_en : (item.wiki || '');
    const dateStr = formatDate(new Date(item.updatedAt || item.createdAt));
    const teaser = content.trim().substring(0, 180);
    const teaserEnd = content.trim().length > 180 ? '...' : '';
    
    const badgeStyle = 'background:' + topicColor.bg + ';color:' + topicColor.text;
    
    card.innerHTML = '<span class="wiki-topic-badge" style="' + badgeStyle + '">' + escapeHtml(topic).toUpperCase() + '</span>' +
      '<h3 class="wiki-subtopic-headline">' + escapeHtml(subtopic) + '</h3>' +
      '<p class="wiki-teaser">' + escapeHtml(teaser) + teaserEnd + '</p>' +
      '<div class="wiki-card-meta">' +
        '<span class="wiki-date">' + dateStr + '</span>' +
        '<span class="wiki-read-more">Weiterlesen</span>' +
      '</div>';
    
    card.addEventListener('click', () => openWikiModalSingle(item));
    card.addEventListener('keydown', (e) => {
      if (e.key === 'Enter' || e.key === ' ') {
        e.preventDefault();
        openWikiModalSingle(item);
      }
    });
    
    grid.appendChild(card);
  });
  observeRevealCards(grid);
}

function formatDate(date) {
  if (!(date instanceof Date) || isNaN(date)) return '';
  const month = String(date.getMonth() + 1).padStart(2, '0');
  const day = String(date.getDate()).padStart(2, '0');
  return day + '.' + month;
}

function closeWikiModal() {
  const overlay = document.getElementById('wiki-modal-overlay');
  if (overlay) overlay.classList.remove('active');
}

function openWikiModalSingle(item) {
  let modalOverlay = document.getElementById('wiki-modal-overlay');
  if (!modalOverlay) {
    modalOverlay = document.createElement('div');
    modalOverlay.id = 'wiki-modal-overlay';
    modalOverlay.className = 'modal-overlay';
    document.body.appendChild(modalOverlay);
  }
  
  const topic = currentLang === 'en' && item.topic_en ? item.topic_en : (item.topic || 'Unknown');
  const subtopic = currentLang === 'en' && item.subtopic_en ? item.subtopic_en : (item.subtopic || '');
  const content = currentLang === 'en' && item.wiki_en ? item.wiki_en : (item.wiki || '');
  const dateStr = formatDate(new Date(item.updatedAt || item.createdAt));
  
  let html = '<div class="modal wiki-modal"><button class="modal-close" onclick="closeWikiModal()">&times;</button>';
  html += '<div class="wiki-modal-content">';
  html += '<div class="wiki-modal-topic">' + escapeHtml(topic) + '</div>';
  html += '<h2 class="wiki-modal-title">' + escapeHtml(subtopic) + '</h2>';
  if (dateStr) html += '<div class="wiki-modal-date">' + dateStr + '</div>';
  html += '<div class="wiki-modal-text">' + escapeHtml(content) + '</div>';
  html += '</div></div>';
  modalOverlay.innerHTML = html;
  modalOverlay.classList.add('active');
}

function searchWiki(term) {
  const t = term.toLowerCase().trim();
  if (!t) {
    wikiActiveTopic = '';
    wikiFilteredData = [...wikiData].sort((a, b) => new Date(b.updatedAt || b.createdAt) - new Date(a.updatedAt || a.createdAt));
  } else {
    wikiActiveTopic = '';
    wikiFilteredData = wikiData.filter(item => {
      const text = ((item.topic_en && currentLang === 'en') ? item.topic_en : (item.topic || '')) + ' ' +
                   ((item.subtopic_en && currentLang === 'en') ? item.subtopic_en : (item.subtopic || '')) + ' ' +
                   ((item.wiki_en && currentLang === 'en') ? item.wiki_en : (item.wiki || ''));
      return text.toLowerCase().includes(t);
    }).sort((a, b) => new Date(b.updatedAt || b.createdAt) - new Date(a.updatedAt || a.createdAt));
  }
  renderWikiTopics();
  wikiCurrentPage = 1;
  renderWikiPage();
}

function getTopicColor(topic) {
  const TOPIC_COLORS = {
    '🌎 Internationales Geschäft': { bg: '#E0F2F1', text: '#00695C', border: '#00695C' },
    '🏦 Banken & Finanzen Filialen': { bg: '#E3F2FD', text: '#1565C0', border: '#1565C0' },
    '🏦 Banken & Finanzen allgmein': { bg: '#E8EAF6', text: '#283593', border: '#283593' },
    '💰 Steuern': { bg: '#FFF3E0', text: '#E65100', border: '#E65100' },
    '💻 Software & Digital Operations': { bg: '#EDE7F6', text: '#4527A0', border: '#4527A0' },
    '📑 Buchhaltung': { bg: '#E8F5E9', text: '#2E7D32', border: '#2E7D32' }
  };
  
  if (TOPIC_COLORS[topic]) return TOPIC_COLORS[topic];
  
  const cleanTopic = topic.replace(/^[^\s]+\s/, '');
  for (const key of Object.keys(TOPIC_COLORS)) {
    const cleanKey = key.replace(/^[^\s]+\s/, '');
    if (cleanTopic === cleanKey) return TOPIC_COLORS[key];
  }
  
  let hash = 0;
  for (let i = 0; i < topic.length; i++) {
    hash = topic.charCodeAt(i) + ((hash << 5) - hash);
  }
  const hues = [200, 180, 240, 30, 140, 60];
  const idx = Math.abs(hash) % hues.length;
  const color = hues[idx];
  return {
    bg: 'hsl(' + color + ', 70%, 92%)',
    text: 'hsl(' + color + ', 60%, 35%)',
    border: 'hsl(' + color + ', 60%, 35%)'
  };
}


// ========================================
// COOKIES
// ========================================
function getCookie(name) {
  const localVal = localStorage.getItem('paraguay_' + name);
  if (localVal) return localVal;
  
  const value = '; ' + document.cookie;
  const parts = value.split('; ' + name + '=');
  if (parts.length === 2) {
    return parts.pop().split(';').shift().replace(/^"|"$/g, '');
  }
  return '';
}


// ========================================
// ESCAPE HTML — utility function
// ========================================
function escapeHtml(text) {
  if (!text) return '';
  const div = document.createElement('div');
  div.textContent = text;
  return div.innerHTML;
}

// ========================================
// DATES / EVENTS
// ========================================
let scheduleData = [];

// Schedule webhook may return { data: [...] } or [{ data: [...] }] — normalize
function normalizeScheduleResult(result) {
  if (!result) return [];
  if (Array.isArray(result)) {
    for (const item of result) {
      if (item && Array.isArray(item.data)) return item.data;
    }
    return [];
  }
  if (Array.isArray(result.data)) return result.data;
  return [];
}

async function loadDates() {
  try {
    const response = await fetch(SCHEDULE_URL);
    if (!response.ok) throw new Error('Failed to fetch');
    const result = await response.json();
    scheduleData = normalizeScheduleResult(result);

    if (scheduleData.length > 0) {
      renderDates(scheduleData);
    } else {
      document.getElementById('dates-list').innerHTML = 
        '<p class="no-events">' + (isDE() ? 'Keine Termine geplant' : 'No events scheduled') + '</p>';
    }
    renderCalendar();
  } catch (error) {
    document.getElementById('dates-list').innerHTML = 
      '<p class="no-events">' + (isDE() ? 'Fehler beim Laden' : 'Error loading events') + '</p>';
    renderCalendar();
  }
}

function renderDates(events) {
  const container = document.getElementById('dates-list');
  container.innerHTML = '';
  
  // Sort events by date
  const sorted = events.sort((a, b) => new Date(a.start) - new Date(b.start));
  
  sorted.forEach((event, idx) => {
    const card = document.createElement('div');
    card.className = 'date-card stagger-' + (idx % 4 + 1);
    
    // Parse date/time from ISO string
    const startDate = new Date(event.start);
    const endDate = new Date(event.end);
    
    // Format date: dd.mm
    const day = String(startDate.getDate()).padStart(2, '0');
    const month = String(startDate.getMonth() + 1).padStart(2, '0');
    const dateStr = day + '.' + month;
    
    // Format time: HH:MM (local time)
    const startHour = String(startDate.getHours()).padStart(2, '0');
    const startMinute = String(startDate.getMinutes()).padStart(2, '0');
    const endHour = String(endDate.getHours()).padStart(2, '0');
    const endMinute = String(endDate.getMinutes()).padStart(2, '0');
    const startStr = startHour + ':' + startMinute;
    const endStr = endHour + ':' + endMinute;
    
    card.innerHTML = '<div class="date-header">' +
      '<div class="date-icon">📅</div>' +
      '<h3 class="date-headline">' + sanitizeHtml(event.headline || 'Event') + '</h3>' +
      '</div><div class="date-info">' +
      '<div class="date-row">' +
      '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><rect x="3" y="4" width="18" height="18" rx="2" ry="2"/><line x1="16" y1="2" x2="16" y2="6"/><line x1="8" y1="2" x2="8" y2="6"/><line x1="3" y1="10" x2="21" y2="10"/></svg>' +
      '<span>' + dateStr + '</span>' +
      '</div><div class="date-row">' +
      '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg>' +
      '<span>' + (isDE() ? 'Start' : 'Start') + ' ' + startStr + '</span>' +
      '</div><div class="date-row">' +
      '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="12" cy="12" r="10"/><polyline points="12 6 12 12 16 14"/></svg>' +
      '<span>' + (isDE() ? 'Ende' : 'End') + ' ' + endStr + '</span>' +
      '</div></div>';
    
    container.appendChild(card);
  });
  observeRevealCards(container);
}

// ========================================
// CALENDAR (next to newsletter) — plain event list from schedule webhook
// ========================================
function pad2(n) { return String(n).padStart(2, '0'); }

// Webhook text may contain simple HTML (e.g. links). Sanitize before injecting:
// strip script/iframe/... tags, on* handlers and javascript: URLs; force
// links to open in a new tab.
function sanitizeHtml(html) {
  const div = document.createElement('div');
  div.innerHTML = String(html || '');
  div.querySelectorAll('script, style, iframe, object, embed, link, meta').forEach(n => n.remove());
  const walk = (node) => {
    Array.from(node.childNodes || []).forEach(child => {
      if (child.nodeType !== 1) return;
      Array.from(child.attributes || []).forEach(attr => {
        const name = attr.name.toLowerCase();
        const val = (attr.value || '').replace(/\s+/g, '').toLowerCase();
        if (name.startsWith('on') || ((name === 'href' || name === 'src') && val.startsWith('javascript:'))) {
          child.removeAttribute(attr.name);
        }
      });
      if (child.tagName === 'A') {
        child.setAttribute('target', '_blank');
        child.setAttribute('rel', 'noopener');
      }
      walk(child);
    });
  };
  walk(div);
  return div.innerHTML;
}

function initCalendar() {
  renderCalendar();
}

function renderCalendar() {
  const eventsEl = document.getElementById('calendar-events');
  if (!eventsEl) return;

  if (scheduleData.length === 0) {
    eventsEl.innerHTML = '<p class="calendar-events-hint">' +
      (isDE() ? 'Keine Termine geplant.' : 'No events scheduled.') + '</p>';
    return;
  }

  const sorted = [...scheduleData].sort((a, b) => new Date(a.start) - new Date(b.start));
  let list = '<ul class="calendar-event-list">';
  sorted.forEach(ev => {
    if (!ev || !ev.start) return;
    const sd = new Date(ev.start);
    const ed = ev.end ? new Date(ev.end) : null;
    const dateStr = pad2(sd.getDate()) + '.' + pad2(sd.getMonth() + 1);
    const timeStr = pad2(sd.getHours()) + ':' + pad2(sd.getMinutes()) +
      (ed ? '–' + pad2(ed.getHours()) + ':' + pad2(ed.getMinutes()) : '');
    list += '<li><span class="calendar-event-date">' + dateStr + '</span>' +
      '<span class="calendar-event-headline">' + sanitizeHtml(ev.headline || 'Event') + '</span>' +
      '<span class="calendar-event-time">' + timeStr + '</span></li>';
  });
  list += '</ul>';
  eventsEl.innerHTML = list;
}

function setCookie(name, value, days) {
  const expires = new Date();
  expires.setTime(expires.getTime() + days * 24 * 60 * 60 * 1000);
  document.cookie = name + '=' + encodeURIComponent(value) + ';expires=' + expires.toUTCString() + ';path=/';
  localStorage.setItem('paraguay_' + name, value);
}