// ========================================
// 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';

let currentLang = 'de';

document.addEventListener('DOMContentLoaded', () => {
  currentLang = document.body.dataset.lang || 'de';
  checkSession();
  loadCommunityStats();
  
  // 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
  const loginBtn = document.getElementById('login-btn');
  if (loginBtn) {
    loginBtn.addEventListener('click', () => {
      openLoginModal();
    });
  }
});

// ========================================
// 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);
  });
}

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';
    loadUsers();
    loadWiki();
  } 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 = 'none';
    document.getElementById('newsletter-section').style.display = 'none';
  }
}

// ========================================
// 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');
  if (user.image) {
    avatar.innerHTML = `<img src="${user.image}" alt="${user.username}">`;
  } else {
    avatar.innerHTML = `<span class="user-avatar-text">${(user.username || '?').charAt(0).toUpperCase()}</span>`;
  }
  
  document.getElementById('user-detail-initial').textContent = '';
  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);
      });
      
      // 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';
  
  const rank = getRank(user.posts || 0);
  const avatarContent = user.image
    ? `<img src="${user.image}" alt="${user.username}">`
    : (user.username || '?').charAt(0).toUpperCase();
  
  card.innerHTML = `
    <div class="user-avatar">${avatarContent}</div>
    <div class="member-info" style="position:relative;">
      <h4>${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', () => 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: '🌱' };
}

// ========================================
// WIKI
// ========================================
let wikiData = [];

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;
      renderWikiCards(wikiData);
      
      // Wiki count will be loaded from community webhook
    } else {
      document.getElementById('wiki-grid').innerHTML = '<p class="loading-text">' + (isDE() ? 'Keine Wiki-Daten' : 'No wiki data') + '</p>';
    }
  } catch (error) {
    document.getElementById('wiki-grid').innerHTML = '<p class="loading-text">' + (isDE() ? 'Fehler beim Laden' : 'Error loading') + '</p>';
  }
}

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;
  }
  
  // Group by topic
  const topics = {};
  data.forEach(item => {
    const topicKey = (item.topic_en && currentLang === 'en') ? item.topic_en : (item.topic || 'Unknown');
    if (!topics[topicKey]) topics[topicKey] = [];
    topics[topicKey].push(item);
  });
  
  const colors = ['blue', 'teal', 'green', 'orange', 'purple', 'pink', 'yellow'];
  
  Object.entries(topics).forEach(([topicName, subtopics], idx) => {
    const card = document.createElement('div');
    card.className = 'wiki-card';
    card.dataset.color = colors[idx % colors.length];
    
    // Get excerpt from first subtopic
    const firstSub = subtopics[0];
    const excerpt = currentLang === 'en' && firstSub.wiki_en ? firstSub.wiki_en : (firstSub.wiki || '');
    const subtopicTitle = currentLang === 'en' && firstSub.subtopic_en ? firstSub.subtopic_en : (firstSub.subtopic || '');
    
    card.innerHTML = `
      <div class="wiki-card-title">${escapeHtml(topicName)}</div>
      <div class="wiki-card-excerpt">${escapeHtml(excerpt.substring(0, 150))}${excerpt.length > 150 ? '...' : ''}</div>
      <div class="wiki-card-footer">
        <span class="wiki-card-subtopic">${escapeHtml(subtopicTitle)}</span>
        <span>${subtopics.length} ${isDE() ? 'Unterpunkte' : 'subtopics'}</span>
      </div>
    `;
    
    // Open modal on click
    card.addEventListener('click', () => openWikiModal(topicName, subtopics));
    
    grid.appendChild(card);
  });
}

function openWikiModal(topicName, subtopics) {
  // Create modal if not exists
  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);
  }
  
  let html = '<div class="modal wiki-modal"><button class="modal-close" onclick="closeWikiModal()">&times;</button>';
  html += '<div class="wiki-modal-content">';
  html += `<h2 class="wiki-modal-title">${escapeHtml(topicName)}</h2>`;
  
  subtopics.forEach(sub => {
    const title = currentLang === 'en' && sub.subtopic_en ? sub.subtopic_en : (sub.subtopic || '');
    const content = currentLang === 'en' && sub.wiki_en ? sub.wiki_en : (sub.wiki || '');
    html += `<h3 class="wiki-modal-subtitle">${escapeHtml(title)}</h3>`;
    html += `<div class="wiki-modal-text">${escapeHtml(content)}</div>`;
  });
  
  html += '</div></div>';
  modalOverlay.innerHTML = html;
  modalOverlay.classList.add('active');
}

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

function searchWiki(term) {
  if (!term.trim()) {
    renderWikiCards(wikiData);
    return;
  }
  
  const t = term.toLowerCase();
  const filtered = wikiData.filter(item => {
    const topic = ((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 topic.toLowerCase().includes(t);
  });
  
  renderWikiCards(filtered);
}

// ========================================
// 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 '';
}

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);
}

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