/**
 * Plants vs. Zombies — Admin Panel & Game Configurator Client
 * Handles Admin Authentication, REST API communication, Sliders, Live Events,
 * User Management, Presets, Bug Moderation, Campaign Level Editor,
 * Active Player Sessions, Login Audit Logs, and Backups.
 */

class PvZConfiguratorApp {
  constructor() {
    this.token = localStorage.getItem('pvz_admin_token') || '';
    this.isAuthenticated = false;
    this.config = null;
    this.stats = null;
    this.users = [];
    this.bugs = [];
    this.levels = [];
    this.selectedLevel = null;
    this.sessions = [];
    this.loginLogs = [];
    this.activeTab = 'tab-dashboard';

    this.init();
  }

  async init() {
    this.bindEvents();
    this.setupSliders();
    
    // Check initial auth status
    if (this.token) {
      const valid = await this.verifyAuth();
      if (valid) {
        this.onAuthenticated();
      } else {
        this.onUnauthenticated();
        this.loadPublicConfig();
      }
    } else {
      this.onUnauthenticated();
      this.loadPublicConfig();
    }
  }

  // ==========================================
  // Toast Alerts
  // ==========================================
  showToast(message, type = 'success') {
    const container = document.getElementById('toast-container');
    if (!container) return;

    const toast = document.createElement('div');
    toast.className = `toast ${type}`;
    const icon = type === 'success' ? '✅' : (type === 'error' ? '❌' : (type === 'warn' ? '⚠️' : 'ℹ️'));
    toast.innerHTML = `<span>${icon}</span> <span>${message}</span>`;
    
    container.appendChild(toast);
    setTimeout(() => {
      toast.style.opacity = '0';
      toast.style.transform = 'translateX(100%)';
      toast.style.transition = 'all 0.3s ease';
      setTimeout(() => toast.remove(), 300);
    }, 3500);
  }

  // ==========================================
  // Authentication & API Helpers
  // ==========================================
  async apiRequest(endpoint, method = 'GET', body = null) {
    const headers = {
      'Content-Type': 'application/json'
    };
    if (this.token) {
      headers['Authorization'] = `Bearer ${this.token}`;
      headers['X-Admin-Token'] = this.token;
    }

    const options = { method, headers };
    if (body) {
      options.body = JSON.stringify(body);
    }

    try {
      const res = await fetch(endpoint, options);
      const data = await res.json();
      return { ok: res.ok, status: res.status, data };
    } catch (err) {
      return { ok: false, status: 0, data: { message: err.message || 'Ошибка сети' } };
    }
  }

  async verifyAuth() {
    const res = await this.apiRequest('/api/admin/stats');
    if (res.ok && res.data.success) {
      this.stats = res.data.stats;
      this.isAuthenticated = true;
      return true;
    }
    this.isAuthenticated = false;
    this.token = '';
    localStorage.removeItem('pvz_admin_token');
    return false;
  }

  onAuthenticated() {
    this.isAuthenticated = true;
    document.getElementById('admin-status-dot').className = 'status-dot';
    document.getElementById('admin-status-text').textContent = 'Администратор';
    document.getElementById('btn-login-modal-open').style.display = 'none';
    const btnPwd = document.getElementById('btn-admin-password-modal-open');
    if (btnPwd) btnPwd.style.display = 'inline-flex';
    document.getElementById('btn-admin-logout').style.display = 'inline-flex';
    
    this.loadAllData();
  }

  onUnauthenticated() {
    this.isAuthenticated = false;
    document.getElementById('admin-status-dot').className = 'status-dot offline';
    document.getElementById('admin-status-text').textContent = 'Гость (Только чтение)';
    document.getElementById('btn-login-modal-open').style.display = 'inline-flex';
    const btnPwd = document.getElementById('btn-admin-password-modal-open');
    if (btnPwd) btnPwd.style.display = 'none';
    document.getElementById('btn-admin-logout').style.display = 'none';
  }

  async loadPublicConfig() {
    const res = await this.apiRequest('/api/config');
    if (res.ok) {
      this.config = res.data;
      this.populateUIFromConfig();
    }
  }

  async loadAllData() {
    await Promise.all([
      this.loadStats(),
      this.loadConfig(),
      this.loadUsers(),
      this.loadBugs(),
      this.loadCampaignLevels(),
      this.loadSessions(),
      this.loadLoginLogs()
    ]);
  }

  // ==========================================
  // Data Fetching
  // ==========================================
  async loadStats() {
    const res = await this.apiRequest('/api/admin/stats');
    if (res.ok && res.data.success) {
      this.stats = res.data.stats;
      this.renderDashboard();
    }
  }

  async loadConfig() {
    const res = await this.apiRequest('/api/admin/config');
    if (res.ok && res.data.success) {
      this.config = res.data.config;
      this.populateUIFromConfig();
    }
  }

  async loadUsers() {
    const res = await this.apiRequest('/api/admin/users');
    if (res.ok && res.data.success) {
      this.users = res.data.users || [];
      this.renderPlayersTable();
    }
  }

  async loadBugs() {
    const res = await this.apiRequest('/api/admin/bugs');
    if (res.ok && res.data.success) {
      this.bugs = res.data.bugs || [];
      this.renderBugsTable();
    }
  }

  // ==========================================
  // UI Rendering & Sliders
  // ==========================================
  setupSliders() {
    document.querySelectorAll('.range-slider').forEach(slider => {
      slider.addEventListener('input', (e) => {
        const id = e.target.id;
        const val = parseFloat(e.target.value);
        const badge = document.getElementById(`val-${id}`);
        if (badge) {
          if (id === 'econ-startingSun') {
            badge.textContent = `${val} ☀️`;
          } else if (id === 'zen-waterIntervalMinutes') {
            badge.textContent = `${val} мин`;
          } else {
            badge.textContent = `${val.toFixed(1)}x`;
          }
        }
      });
    });
  }

  setSliderValue(id, value, suffix = 'x') {
    const el = document.getElementById(id);
    const badge = document.getElementById(`val-${id}`);
    if (el) el.value = value;
    if (badge) {
      if (suffix === 'sun') {
        badge.textContent = `${value} ☀️`;
      } else if (suffix === 'min') {
        badge.textContent = `${value} мин`;
      } else {
        badge.textContent = `${parseFloat(value).toFixed(1)}x`;
      }
    }
  }

  populateUIFromConfig() {
    if (!this.config) return;

    // 1. Economy
    const eco = this.config.economy || {};
    this.setSliderValue('econ-sunMultiplier', eco.sunMultiplier ?? 1.0);
    this.setSliderValue('econ-startingSun', eco.startingSun ?? 50, 'sun');
    this.setSliderValue('econ-coinDropRate', eco.coinDropRate ?? 1.0);
    this.setSliderValue('econ-sunDropRate', eco.sunDropRate ?? 1.0);
    this.setSliderValue('econ-plantCostMultiplier', eco.plantCostMultiplier ?? 1.0);
    this.setSliderValue('econ-upgradeCostMultiplier', eco.upgradeCostMultiplier ?? 1.0);

    // 2. Zombies
    const zom = this.config.zombies || {};
    this.setSliderValue('zom-hpMultiplier', zom.hpMultiplier ?? 1.0);
    this.setSliderValue('zom-speedMultiplier', zom.speedMultiplier ?? 1.0);
    this.setSliderValue('zom-damageMultiplier', zom.damageMultiplier ?? 1.0);
    this.setSliderValue('zom-waveDensityMultiplier', zom.waveDensityMultiplier ?? 1.0);

    // 3. Plants
    const plt = this.config.plants || {};
    this.setSliderValue('plant-damageMultiplier', plt.damageMultiplier ?? 1.0);
    this.setSliderValue('plant-hpMultiplier', plt.hpMultiplier ?? 1.0);
    this.setSliderValue('plant-cooldownMultiplier', plt.cooldownMultiplier ?? 1.0);
    this.setSliderValue('plant-sunProduceIntervalMultiplier', plt.sunProduceIntervalMultiplier ?? 1.0);

    // 4. Zen Garden
    const zen = this.config.zenGarden || {};
    this.setSliderValue('zen-dropRateMultiplier', zen.dropRateMultiplier ?? 1.0);
    this.setSliderValue('zen-growthRateMultiplier', zen.growthRateMultiplier ?? 1.0);
    this.setSliderValue('zen-fertilizerMultiplier', zen.fertilizerMultiplier ?? 1.0);
    this.setSliderValue('zen-waterIntervalMinutes', zen.waterIntervalMinutes ?? 30, 'min');

    // 5. Events
    const ev = this.config.events || {};
    document.getElementById('event-doubleGold').checked = !!ev.doubleGold;
    document.getElementById('event-fastCooldowns').checked = !!ev.fastCooldowns;
    document.getElementById('event-infiniteSun').checked = !!ev.infiniteSun;
    document.getElementById('event-turboZombies').checked = !!ev.turboZombies;
  }

  renderDashboard() {
    if (!this.stats) return;
    document.getElementById('dash-total-users').textContent = this.stats.totalUsers ?? 0;
    document.getElementById('dash-active-24h').textContent = this.stats.active24h ?? 0;
    document.getElementById('dash-total-coins').textContent = (this.stats.totalCoins ?? 0).toLocaleString('ru-RU');
    document.getElementById('dash-banned-users').textContent = this.stats.bannedUsers ?? 0;
    document.getElementById('dash-total-bugs').textContent = this.stats.totalBugs ?? (this.bugs ? this.bugs.length : 0);
    document.getElementById('dash-active-preset').textContent = this.stats.activeConfig?.preset || this.config?.preset || 'Classic 2009';

    const sCount = document.getElementById('dash-active-sessions');
    if (sCount) sCount.textContent = this.stats.activeSessions ?? (this.sessions ? this.sessions.length : 0);

    const lCount = document.getElementById('dash-total-logs');
    if (lCount) lCount.textContent = this.stats.totalLoginLogs ?? (this.loginLogs ? this.loginLogs.length : 0);

    const cCount = document.getElementById('dash-campaign-levels');
    if (cCount) cCount.textContent = this.stats.campaignLevelsCount ?? (this.levels ? this.levels.length : 25);

    const zCount = document.getElementById('dash-total-zombies');
    if (zCount) zCount.textContent = (this.stats.totalZombiesKilled ?? 0).toLocaleString('ru-RU');

    const pCount = document.getElementById('dash-total-plants');
    if (pCount) pCount.textContent = (this.stats.totalPlantsPlanted ?? 0).toLocaleString('ru-RU');

    const sunCount = document.getElementById('dash-total-sun');
    if (sunCount) sunCount.textContent = (this.stats.totalSunProduced ?? 0).toLocaleString('ru-RU');
  }

  // ==========================================
  // CAMPAIGN LEVEL EDITOR TAB
  // ==========================================
  async loadCampaignLevels() {
    const res = await this.apiRequest('/api/admin/campaign/levels');
    if (res.ok && res.data.success) {
      this.levels = res.data.levels || [];
      this.renderLevelSelector();
      if (!this.selectedLevel && this.levels.length > 0) {
        this.selectLevel(1);
      } else if (this.selectedLevel) {
        this.selectLevel(this.selectedLevel.level);
      }
    }
  }

  renderLevelSelector() {
    const dropdown = document.getElementById('level-select-dropdown');
    const grid = document.getElementById('levels-grid-selector');
    if (!dropdown || !grid) return;

    dropdown.innerHTML = '';
    grid.innerHTML = '';

    const worldIcons = { 1: '☀️', 2: '🌙', 3: '🏊', 4: '🌫️', 5: '🏠' };
    const worldNames = { 1: 'Солнечный День', 2: 'Ночной Двор', 3: 'Бассейн', 4: 'Ночной Туман', 5: 'Крыша Дома' };

    this.levels.forEach(lvl => {
      const wIcon = worldIcons[lvl.world] || '🌱';
      const opt = document.createElement('option');
      opt.value = lvl.level;
      opt.textContent = `${lvl.code}: ${lvl.title} (${wIcon} ${lvl.biome})`;
      dropdown.appendChild(opt);

      const pill = document.createElement('div');
      pill.className = `level-pill ${lvl.isBoss || lvl.is_boss ? 'is-boss' : ''} ${this.selectedLevel?.level === lvl.level ? 'active' : ''}`;
      pill.id = `level-pill-${lvl.level}`;
      pill.title = `${lvl.code} - ${lvl.title} (${worldNames[lvl.world] || 'Мир ' + lvl.world})`;
      pill.innerHTML = `
        <span class="level-pill-num">${lvl.code}</span>
        <span class="level-pill-icon">${lvl.isBoss || lvl.is_boss ? '👑' : wIcon}</span>
      `;
      pill.addEventListener('click', () => this.selectLevel(lvl.level));
      grid.appendChild(pill);
    });

    dropdown.onchange = (e) => {
      this.selectLevel(parseInt(e.target.value, 10));
    };
  }

  selectLevel(levelNum) {
    const lvl = this.levels.find(l => l.level === parseInt(levelNum, 10)) || this.levels[0];
    if (!lvl) return;
    this.selectedLevel = JSON.parse(JSON.stringify(lvl));

    // Update active UI badges and chips
    document.querySelectorAll('.level-pill').forEach(p => p.classList.remove('active'));
    const activePill = document.getElementById(`level-pill-${lvl.level}`);
    if (activePill) activePill.classList.add('active');

    const dropdown = document.getElementById('level-select-dropdown');
    if (dropdown) dropdown.value = lvl.level;

    const worldNames = { 1: '☀️ Солнечный День', 2: '🌙 Ночной Двор', 3: '🏊 Бассейн', 4: '🌫️ Ночной Туман', 5: '🏠 Крыша Дома' };
    document.getElementById('current-level-badge-code').textContent = lvl.code || `${lvl.world}-${lvl.stage}`;
    document.getElementById('current-level-badge-world').textContent = worldNames[lvl.world] || `Мир ${lvl.world}`;

    // Fill Basic Info
    document.getElementById('level-code').value = lvl.code || '';
    document.getElementById('level-number').value = lvl.level || 1;
    document.getElementById('level-title').value = lvl.title || '';
    document.getElementById('level-desc').value = lvl.desc || '';
    document.getElementById('level-world').value = lvl.world || 1;
    document.getElementById('level-biome').value = lvl.biome || 'day';
    document.getElementById('level-reward-coins').value = lvl.reward ?? 100;
    document.getElementById('level-reward-crystals').value = lvl.rewardCrystals ?? (lvl.reward_crystals ?? 0);
    document.getElementById('level-is-boss').checked = !!(lvl.isBoss || lvl.is_boss);

    // Fill Modifiers
    const mods = lvl.modifiers || {};
    this.setSliderValue('mod-zombie-hp', mods.zombieHpMult ?? 1.0);
    this.setSliderValue('mod-zombie-speed', mods.zombieSpeedMult ?? 1.0);
    document.getElementById('mod-startingSun') ? (document.getElementById('mod-startingSun').value = mods.startingSun ?? 50) : null;
    document.getElementById('mod-starting-sun').value = mods.startingSun ?? 50;
    document.getElementById('mod-special-event').value = mods.specialEvent || 'none';
    document.getElementById('mod-conveyor-deck').checked = !!mods.conveyorDeck;
    document.getElementById('mod-fast-recharge').checked = !!mods.fastRecharge;

    // Fill Dialogue
    const dia = lvl.dialogue || {};
    document.getElementById('dialogue-speaker').value = dia.speaker || '🧔';
    document.getElementById('dialogue-title').value = dia.title || '';
    document.getElementById('dialogue-text').value = dia.text || '';
    document.getElementById('dialogue-btn-text').value = dia.btnText || 'ДАЛЕЕ / В БОЙ ⚔️';
    this.updateDialoguePreview();

    // Render Waves
    this.renderWavesConfigurator();
  }

  updateDialoguePreview() {
    const speaker = document.getElementById('dialogue-speaker').value || '🧔';
    const title = document.getElementById('dialogue-title').value || 'Диалог перед боем';
    const text = document.getElementById('dialogue-text').value || '(Реплика отсутствует)';
    const btn = document.getElementById('dialogue-btn-text').value || 'ДАЛЕЕ / В БОЙ ⚔️';

    document.getElementById('dialogue-preview-speaker').textContent = speaker;
    document.getElementById('dialogue-preview-title').textContent = title;
    document.getElementById('dialogue-preview-text').textContent = text;
    document.getElementById('dialogue-preview-btn').textContent = btn;
  }

  renderWavesConfigurator() {
    const container = document.getElementById('level-waves-container');
    if (!container) return;
    container.innerHTML = '';

    let waves = this.selectedLevel?.waves;
    if (!waves || (Array.isArray(waves) && waves.length === 0) || (typeof waves === 'object' && Object.keys(waves).length === 0)) {
      waves = [
        { title: 'Волна 1', isFlag: false, zombies: [{ type: 'normal', count: 5, interval: 3.5 }] },
        { title: 'Волна 2', isFlag: false, zombies: [{ type: 'normal', count: 6, interval: 3.0 }, { type: 'conehead', count: 2, interval: 4.0 }] },
        { title: 'Финальная волна 🏁', isFlag: true, zombies: [{ type: 'flag', count: 1, interval: 1.0 }, { type: 'buckethead', count: 2, interval: 3.0 }, { type: 'normal', count: 8, interval: 2.0 }] }
      ];
      this.selectedLevel.waves = waves;
    }

    const wavesArray = Array.isArray(waves) ? waves : Object.values(waves);
    const zombieTypes = [
      { id: 'normal', name: '🧟 Обычный зомби' },
      { id: 'conehead', name: '🪖 Зомби с конусом' },
      { id: 'buckethead', name: '🪣 Зомби с ведром' },
      { id: 'newspaper', name: '📰 Зомби с газетой' },
      { id: 'screendoor', name: '🚪 Зомби с дверью' },
      { id: 'football', name: '🏈 Зомби-футболист' },
      { id: 'dancing', name: '🕺 Танцующий зомби' },
      { id: 'duckytube', name: '🦆 Зомби на уточке' },
      { id: 'polevaulter', name: '🏃 Прыгун с шестом' },
      { id: 'flag', name: '🚩 Флагманский зомби' },
      { id: 'gargantuar', name: '👹 Гаргантюа' },
      { id: 'zomboss', name: '🤖 Доктор Зомбосс' }
    ];

    wavesArray.forEach((wave, wIdx) => {
      const card = document.createElement('div');
      card.className = `wave-card ${wave.isFlag ? 'is-final' : ''}`;
      card.dataset.waveIndex = wIdx;

      let zombiesHtml = '';
      const zList = wave.zombies || [{ type: 'normal', count: 4, interval: 3.0 }];

      zList.forEach((z, zIdx) => {
        let optHtml = '';
        zombieTypes.forEach(t => {
          optHtml += `<option value="${t.id}" ${z.type === t.id ? 'selected' : ''}>${t.name}</option>`;
        });

        zombiesHtml += `
          <div class="wave-zombie-row" data-zombie-index="${zIdx}">
            <select class="form-select wave-zombie-type" style="padding: 4px 8px; font-size: 12px;">
              ${optHtml}
            </select>
            <div class="wave-zombie-count-group">
              <span style="font-size: 11px; color: var(--text-muted);">Кол-во:</span>
              <input type="number" class="form-input wave-zombie-count" min="1" max="50" value="${z.count || 1}" style="padding: 4px 6px; font-size: 12px; width: 55px;">
            </div>
            <div class="wave-zombie-interval-group">
              <span style="font-size: 11px; color: var(--text-muted);">Интервал:</span>
              <input type="number" class="form-input wave-zombie-interval" min="0.2" max="20" step="0.2" value="${z.interval || 2.5}" style="padding: 4px 6px; font-size: 12px; width: 60px;">
              <span style="font-size: 10px; color: var(--text-dim);">с</span>
            </div>
            <button class="btn-remove-zombie-entry" title="Удалить тип зомби">🗑️</button>
          </div>
        `;
      });

      card.innerHTML = `
        <div class="wave-card-header">
          <div class="wave-card-title">
            <span>${wave.isFlag ? '🏁' : '🌊'}</span>
            <input type="text" class="form-input wave-title-input" value="${wave.title || 'Волна ' + (wIdx + 1)}" style="padding: 2px 8px; font-size: 13px; font-weight: bold; width: 160px; background: transparent; border-color: transparent;">
          </div>
          <div style="display: flex; align-items: center; gap: 10px;">
            <label class="checkbox-label" style="font-size: 11px;">
              <input type="checkbox" class="wave-flag-checkbox" ${wave.isFlag ? 'checked' : ''}>
              <span>🚩 Флаг</span>
            </label>
            <button class="btn btn-secondary btn-sm btn-add-zombie-to-wave" style="padding: 2px 8px; font-size: 11px;">➕ Зомби</button>
            <button class="btn btn-danger btn-sm btn-remove-wave" style="padding: 2px 8px; font-size: 11px;">✕</button>
          </div>
        </div>
        <div class="wave-zombies-list">
          ${zombiesHtml}
        </div>
      `;

      // Event handlers for this wave card
      card.querySelector('.btn-add-zombie-to-wave').addEventListener('click', () => {
        this.addZombieToWave(wIdx);
      });

      card.querySelector('.btn-remove-wave').addEventListener('click', () => {
        this.removeWave(wIdx);
      });

      card.querySelectorAll('.btn-remove-zombie-entry').forEach((btn, zIdx) => {
        btn.addEventListener('click', () => {
          this.removeZombieFromWave(wIdx, zIdx);
        });
      });

      container.appendChild(card);
    });
  }

  addZombieToWave(waveIdx) {
    this.collectCurrentLevelData();
    let waves = this.selectedLevel.waves;
    const wavesArr = Array.isArray(waves) ? waves : Object.values(waves);
    if (wavesArr[waveIdx]) {
      if (!wavesArr[waveIdx].zombies) wavesArr[waveIdx].zombies = [];
      wavesArr[waveIdx].zombies.push({ type: 'conehead', count: 2, interval: 3.0 });
      this.selectedLevel.waves = wavesArr;
      this.renderWavesConfigurator();
    }
  }

  removeZombieFromWave(waveIdx, zombieIdx) {
    this.collectCurrentLevelData();
    let waves = this.selectedLevel.waves;
    const wavesArr = Array.isArray(waves) ? waves : Object.values(waves);
    if (wavesArr[waveIdx] && wavesArr[waveIdx].zombies) {
      wavesArr[waveIdx].zombies.splice(zombieIdx, 1);
      if (wavesArr[waveIdx].zombies.length === 0) {
        wavesArr[waveIdx].zombies.push({ type: 'normal', count: 1, interval: 3.0 });
      }
      this.selectedLevel.waves = wavesArr;
      this.renderWavesConfigurator();
    }
  }

  addWave() {
    this.collectCurrentLevelData();
    let waves = this.selectedLevel.waves;
    const wavesArr = Array.isArray(waves) ? waves : Object.values(waves);
    const newIdx = wavesArr.length + 1;
    wavesArr.push({
      title: `Волна ${newIdx}`,
      isFlag: false,
      zombies: [{ type: 'normal', count: 4, interval: 3.0 }]
    });
    this.selectedLevel.waves = wavesArr;
    this.renderWavesConfigurator();
    this.showToast(`Добавлена волна ${newIdx}`, 'info');
  }

  removeWave(waveIdx) {
    this.collectCurrentLevelData();
    let waves = this.selectedLevel.waves;
    const wavesArr = Array.isArray(waves) ? waves : Object.values(waves);
    if (wavesArr.length <= 1) {
      this.showToast('Уровень должен содержать минимум 1 волну', 'warn');
      return;
    }
    wavesArr.splice(waveIdx, 1);
    this.selectedLevel.waves = wavesArr;
    this.renderWavesConfigurator();
  }

  collectCurrentLevelData() {
    if (!this.selectedLevel) return null;

    const code = document.getElementById('level-code').value.trim() || '1-1';
    const levelNum = parseInt(document.getElementById('level-number').value, 10) || 1;
    const title = document.getElementById('level-title').value.trim() || `Уровень ${code}`;
    const desc = document.getElementById('level-desc').value.trim();
    const world = parseInt(document.getElementById('level-world').value, 10) || 1;
    const biome = document.getElementById('level-biome').value;
    const reward = parseInt(document.getElementById('level-reward-coins').value, 10) || 100;
    const rewardCrystals = parseInt(document.getElementById('level-reward-crystals').value, 10) || 0;
    const isBoss = document.getElementById('level-is-boss').checked ? 1 : 0;

    // Modifiers
    const modifiers = {
      zombieHpMult: parseFloat(document.getElementById('mod-zombie-hp').value) || 1.0,
      zombieSpeedMult: parseFloat(document.getElementById('mod-zombie-speed').value) || 1.0,
      startingSun: parseInt(document.getElementById('mod-starting-sun').value, 10) || 50,
      specialEvent: document.getElementById('mod-special-event').value || 'none',
      conveyorDeck: document.getElementById('mod-conveyor-deck').checked,
      fastRecharge: document.getElementById('mod-fast-recharge').checked
    };

    // Dialogue
    const dialogue = {
      speaker: document.getElementById('dialogue-speaker').value || '🧔',
      title: document.getElementById('dialogue-title').value.trim(),
      text: document.getElementById('dialogue-text').value.trim(),
      btnText: document.getElementById('dialogue-btn-text').value.trim() || 'ДАЛЕЕ / В БОЙ ⚔️'
    };

    // Waves extraction from DOM
    const waveCards = document.querySelectorAll('.wave-card');
    const waves = [];
    waveCards.forEach((card, wIdx) => {
      const titleInput = card.querySelector('.wave-title-input');
      const flagCheck = card.querySelector('.wave-flag-checkbox');
      const zombieRows = card.querySelectorAll('.wave-zombie-row');

      const zombies = [];
      zombieRows.forEach(row => {
        const type = row.querySelector('.wave-zombie-type').value;
        const count = parseInt(row.querySelector('.wave-zombie-count').value, 10) || 1;
        const interval = parseFloat(row.querySelector('.wave-zombie-interval').value) || 2.5;
        zombies.push({ type, count, interval });
      });

      waves.push({
        title: titleInput ? titleInput.value.trim() : `Волна ${wIdx + 1}`,
        isFlag: flagCheck ? flagCheck.checked : false,
        zombies: zombies.length > 0 ? zombies : [{ type: 'normal', count: 4, interval: 3.0 }]
      });
    });

    const levelData = {
      level: levelNum,
      world: world,
      stage: parseInt(code.split('-')[1], 10) || 1,
      code: code,
      title: title,
      desc: desc,
      reward: reward,
      rewardCrystals: rewardCrystals,
      biome: biome,
      isBoss: isBoss,
      waves: waves,
      modifiers: modifiers,
      dialogue: dialogue
    };

    this.selectedLevel = levelData;
    return levelData;
  }

  async saveCurrentLevel() {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }

    const levelData = this.collectCurrentLevelData();
    if (!levelData) return;

    const res = await this.apiRequest('/api/admin/campaign/level/save', 'POST', { level: levelData });
    if (res.ok && res.data.success) {
      this.showToast(`Уровень ${levelData.code} успешно сохранен!`, 'success');
      // Update in local array
      const idx = this.levels.findIndex(l => l.level === levelData.level);
      if (idx !== -1) {
        this.levels[idx] = levelData;
      } else {
        this.levels.push(levelData);
        this.levels.sort((a,b) => a.level - b.level);
      }
      this.renderLevelSelector();
      this.selectLevel(levelData.level);
    } else {
      this.showToast(res.data.message || 'Ошибка сохранения уровня', 'error');
    }
  }

  async resetCurrentLevel() {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }
    if (!this.selectedLevel) return;

    if (!confirm(`Сбросить параметры уровня ${this.selectedLevel.code} к оригинальным заводским настройкам?`)) {
      return;
    }

    const res = await this.apiRequest('/api/admin/campaign/level/reset', 'POST', { level: this.selectedLevel.level });
    if (res.ok && res.data.success) {
      this.showToast(`Уровень ${this.selectedLevel.code} сброшен к стандарту`, 'success');
      await this.loadCampaignLevels();
    } else {
      this.showToast(res.data.message || 'Ошибка сброса уровня', 'error');
    }
  }

  createNewLevel() {
    const nextNum = (this.levels.reduce((max, l) => Math.max(max, l.level || 0), 0)) + 1;
    const world = Math.min(5, Math.floor((nextNum - 1) / 5) + 1);
    const stage = ((nextNum - 1) % 5) + 1;
    const code = `${world}-${stage}`;

    const newLvl = {
      level: nextNum,
      world: world,
      stage: stage,
      code: code,
      title: `Новый рубеж ${code}`,
      desc: `Пользовательский этап кампании ${code}`,
      reward: 200,
      rewardCrystals: 1,
      biome: world === 2 ? 'night' : (world === 3 ? 'pool' : (world === 4 ? 'fog' : (world === 5 ? 'roof' : 'day'))),
      isBoss: false,
      waves: [
        { title: 'Волна 1', isFlag: false, zombies: [{ type: 'normal', count: 5, interval: 3.0 }] },
        { title: 'Финальная волна 🏁', isFlag: true, zombies: [{ type: 'flag', count: 1, interval: 1.0 }, { type: 'conehead', count: 3, interval: 2.5 }] }
      ],
      modifiers: { zombieHpMult: 1.0, zombieSpeedMult: 1.0, startingSun: 50, specialEvent: 'none', conveyorDeck: false, fastRecharge: false },
      dialogue: { speaker: '🧔', title: 'Безумный Дэйв готов к бою:', text: 'Новый уровень! Посади побольше подсолнухов!', btnText: 'ДАЛЕЕ / В БОЙ ⚔️' }
    };

    this.levels.push(newLvl);
    this.renderLevelSelector();
    this.selectLevel(nextNum);
    this.showToast(`Создан новый этап ${code}. Настройте и нажмите "Сохранить".`, 'info');
  }

  // ==========================================
  // ACTIVE PLAYER SESSIONS TAB
  // ==========================================
  async loadSessions() {
    const res = await this.apiRequest('/api/admin/sessions');
    if (res.ok && res.data.success) {
      this.sessions = res.data.sessions || [];
      const cnt = document.getElementById('sessions-total-count');
      if (cnt) cnt.textContent = this.sessions.length;
      const dashCnt = document.getElementById('dash-active-sessions');
      if (dashCnt) dashCnt.textContent = this.sessions.length;
      this.renderSessionsTable();
    }
  }

  renderSessionsTable(filter = '') {
    const tbody = document.getElementById('sessions-table-body');
    if (!tbody) return;

    filter = (filter || document.getElementById('sessions-search-input')?.value || '').toLowerCase().trim();

    let filtered = this.sessions;
    if (filter) {
      filtered = filtered.filter(s => 
        (s.username && s.username.toLowerCase().includes(filter)) ||
        (s.ipAddress && s.ipAddress.toLowerCase().includes(filter)) ||
        (s.token && s.token.toLowerCase().includes(filter)) ||
        (s.deviceName && s.deviceName.toLowerCase().includes(filter))
      );
    }

    if (filtered.length === 0) {
      tbody.innerHTML = `<tr><td colspan="7" style="text-align:center; color: var(--text-dim); padding: 24px;">Активных сессий не найдено</td></tr>`;
      return;
    }

    tbody.innerHTML = '';
    filtered.forEach(s => {
      const tr = document.createElement('tr');
      const tokenShort = (s.token || '').substring(0, 10) + '...';
      const isOnline = true;

      tr.innerHTML = `
        <td>
          <span class="player-name-link" data-user-id="${s.userId}">${s.username || 'Гость'}</span>
          ${s.isAdmin ? '<span class="badge badge-warning" style="font-size:10px; margin-left:4px;">ADMIN</span>' : ''}
        </td>
        <td><span style="font-family:monospace; color:var(--text-muted);">${s.ipAddress || '127.0.0.1'}</span></td>
        <td><span style="color:var(--text-main); font-size:12px;">${s.deviceName || 'Браузер'}</span></td>
        <td style="color:var(--text-dim); font-size:12px;">${s.createdAt || '—'}</td>
        <td><span style="color:#a5d6a7; font-size:12px;">🟢 ${s.lastActive || s.createdAt || 'Только что'}</span></td>
        <td><span class="token-cell" title="${s.token}">${tokenShort}</span></td>
        <td>
          <button class="btn btn-danger btn-sm btn-terminate-session" data-token="${s.token}" title="Завершить сессию игрока">
            🚪 Завершить
          </button>
        </td>
      `;

      tr.querySelector('.player-name-link').addEventListener('click', () => {
        if (s.userId) this.openEditPlayerModal(s.userId);
      });

      tr.querySelector('.btn-terminate-session').addEventListener('click', () => {
        this.terminateSession(s.token, s.username);
      });

      tbody.appendChild(tr);
    });
  }

  async terminateSession(token, username = '') {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }

    if (!confirm(`Принудительно завершить активную сессию для игрока ${username || token}?`)) {
      return;
    }

    const res = await this.apiRequest('/api/admin/session/terminate', 'POST', { targetToken: token });
    if (res.ok && res.data.success) {
      this.showToast('Сессия успешно завершена', 'success');
      await this.loadSessions();
      await this.loadStats();
    } else {
      this.showToast(res.data.message || 'Ошибка завершения сессии', 'error');
    }
  }

  // ==========================================
  // LOGIN AUDIT LOGS TAB
  // ==========================================
  async loadLoginLogs() {
    const res = await this.apiRequest('/api/admin/logs');
    if (res.ok && res.data.success) {
      this.loginLogs = res.data.logs || [];
      const cnt = document.getElementById('logs-total-count');
      if (cnt) cnt.textContent = this.loginLogs.length;
      const dashCnt = document.getElementById('dash-total-logs');
      if (dashCnt) dashCnt.textContent = this.loginLogs.length;
      this.renderLoginLogsTable();
    }
  }

  renderLoginLogsTable() {
    const tbody = document.getElementById('logs-table-body');
    if (!tbody) return;

    const userFilter = document.getElementById('logs-filter-username')?.value.toLowerCase().trim() || '';
    const ipFilter = document.getElementById('logs-filter-ip')?.value.toLowerCase().trim() || '';
    const statusFilter = document.getElementById('logs-filter-status')?.value || 'all';

    let filtered = this.loginLogs;
    if (userFilter) {
      filtered = filtered.filter(l => l.username && l.username.toLowerCase().includes(userFilter));
    }
    if (ipFilter) {
      filtered = filtered.filter(l => l.ipAddress && l.ipAddress.toLowerCase().includes(ipFilter));
    }
    if (statusFilter !== 'all') {
      filtered = filtered.filter(l => l.status === statusFilter);
    }

    if (filtered.length === 0) {
      tbody.innerHTML = `<tr><td colspan="5" style="text-align:center; color: var(--text-dim); padding: 24px;">Записей в журнале входов не найдено</td></tr>`;
      return;
    }

    tbody.innerHTML = '';
    filtered.forEach(log => {
      const tr = document.createElement('tr');
      
      let statusBadge = `<span class="badge badge-muted">${log.status}</span>`;
      if (log.status === 'success') {
        statusBadge = `<span class="badge badge-success">✅ Успешно</span>`;
      } else if (log.status === 'registered') {
        statusBadge = `<span class="badge badge-purple">🎉 Регистрация</span>`;
      } else if (log.status === 'wrong_password') {
        statusBadge = `<span class="badge badge-danger">❌ Неверный пароль</span>`;
      } else if (log.status === 'banned_login_attempt') {
        statusBadge = `<span class="badge badge-warning">🚫 Заблокирован</span>`;
      } else if (log.status === 'rate_limited') {
        statusBadge = `<span class="badge badge-warning">⚠️ Превышен лимит</span>`;
      } else if (log.status === 'user_not_found') {
        statusBadge = `<span class="badge badge-muted">❓ Не найден</span>`;
      }

      tr.innerHTML = `
        <td style="color:var(--text-dim); font-size:12px; font-family:monospace;">${log.timestamp || '—'}</td>
        <td><b style="color:var(--accent-cyan);">${log.username || '—'}</b></td>
        <td><span style="font-family:monospace; color:var(--text-muted); font-size:12px;">${log.ipAddress || '—'}</span></td>
        <td style="font-size:12px; color:var(--text-main);">${log.deviceName || 'Браузер'}</td>
        <td>${statusBadge}</td>
      `;
      tbody.appendChild(tr);
    });
  }

  // ==========================================
  // CHANGE ADMIN PASSWORD ACTION
  // ==========================================
  async changeAdminPassword() {
    const curPwd = document.getElementById('admin-current-password').value.trim();
    const newPwd = document.getElementById('admin-new-password').value.trim();
    const confirmPwd = document.getElementById('admin-confirm-password').value.trim();
    const errDiv = document.getElementById('admin-password-error');

    if (!newPwd) {
      errDiv.textContent = 'Введите новый пароль';
      errDiv.style.display = 'block';
      return;
    }

    if (newPwd.length < 6) {
      errDiv.textContent = 'Пароль должен содержать минимум 6 символов';
      errDiv.style.display = 'block';
      return;
    }

    if (newPwd !== confirmPwd) {
      errDiv.textContent = 'Пароли не совпадают';
      errDiv.style.display = 'block';
      return;
    }

    errDiv.style.display = 'none';

    const res = await this.apiRequest('/api/admin/password/change', 'POST', {
      currentPassword: curPwd,
      newPassword: newPwd
    });

    if (res.ok && res.data.success) {
      this.showToast('Мастер-пароль администратора успешно изменен!', 'success');
      document.getElementById('modal-admin-password').classList.remove('active');
      document.getElementById('admin-current-password').value = '';
      document.getElementById('admin-new-password').value = '';
      document.getElementById('admin-confirm-password').value = '';
    } else {
      errDiv.textContent = res.data.message || 'Ошибка смены пароля';
      errDiv.style.display = 'block';
    }
  }

  // ==========================================
  // PLAYERS TABLE & MODALS
  // ==========================================
  renderPlayersTable() {
    const tbody = document.getElementById('players-table-body');
    if (!tbody) return;

    const search = document.getElementById('player-search-input')?.value.toLowerCase().trim() || '';
    const filterStatus = document.getElementById('player-filter-status')?.value || 'all';
    const sort = document.getElementById('player-sort-select')?.value || 'id_asc';

    let list = [...this.users];

    if (search) {
      list = list.filter(u => u.username.toLowerCase().includes(search) || String(u.id).includes(search));
    }

    if (filterStatus === 'active') list = list.filter(u => !u.isBanned);
    else if (filterStatus === 'banned') list = list.filter(u => u.isBanned);
    else if (filterStatus === 'admin') list = list.filter(u => u.isAdmin);

    list.sort((a, b) => {
      if (sort === 'id_desc') return b.id - a.id;
      if (sort === 'coins_desc') return b.coins - a.coins;
      if (sort === 'level_desc') return b.level - a.level;
      if (sort === 'login_desc') return (b.lastLogin || '').localeCompare(a.lastLogin || '');
      return a.id - b.id;
    });

    if (list.length === 0) {
      tbody.innerHTML = `<tr><td colspan="9" style="text-align:center; color: var(--text-dim); padding: 24px;">Игроки не найдены</td></tr>`;
      return;
    }

    tbody.innerHTML = '';
    list.forEach(u => {
      const tr = document.createElement('tr');
      
      let statusHtml = '<span class="badge badge-success">Активен</span>';
      if (u.isBanned) {
        statusHtml = `<span class="badge badge-danger" title="${u.banReason || 'Заблокирован'}">🚫 Бан</span>`;
      } else if (u.isAdmin) {
        statusHtml = '<span class="badge badge-warning">⭐ Админ</span>';
      }

      tr.innerHTML = `
        <td><span style="font-family:monospace; color:var(--text-dim);">#${u.id}</span></td>
        <td><b style="color:var(--accent-cyan); cursor:pointer;" class="player-name-click">${u.username}</b></td>
        <td>${statusHtml}</td>
        <td><span class="badge badge-info">Ур. ${u.level}</span></td>
        <td><span style="color:var(--accent-gold); font-weight:bold;">${(u.coins || 0).toLocaleString('ru-RU')} 💰</span></td>
        <td><span style="color:var(--text-main); font-weight:600;">${(u.highScore || 0).toLocaleString('ru-RU')}</span></td>
        <td style="font-size:12px; color:var(--text-dim);">${u.createdAt || '—'}</td>
        <td style="font-size:12px; color:var(--text-dim);">${u.lastLogin || '—'}</td>
        <td>
          <div style="display: flex; gap: 6px;">
            <button class="btn btn-secondary btn-sm btn-view-stats" title="Статистика и инвентарь">📊</button>
            <button class="btn btn-secondary btn-sm btn-edit-player" title="Редактировать">✏️</button>
            <button class="btn btn-secondary btn-sm btn-reset-pwd-open" title="Сбросить пароль">🔑</button>
            <button class="btn btn-danger btn-sm btn-delete-player" title="Удалить аккаунт">🗑️</button>
          </div>
        </td>
      `;

      tr.querySelector('.player-name-click').addEventListener('click', () => this.openPlayerStatsModal(u.id));
      tr.querySelector('.btn-view-stats').addEventListener('click', () => this.openPlayerStatsModal(u.id));
      tr.querySelector('.btn-edit-player').addEventListener('click', () => this.openEditPlayerModal(u.id));
      tr.querySelector('.btn-reset-pwd-open').addEventListener('click', () => this.openResetPasswordModal(u.id, u.username));
      tr.querySelector('.btn-delete-player').addEventListener('click', () => this.deletePlayer(u.id, u.username));

      tbody.appendChild(tr);
    });
  }

  async openPlayerStatsModal(userId) {
    const res = await this.apiRequest(`/api/admin/user/${userId}`);
    if (!res.ok || !res.data.success) {
      this.showToast('Ошибка загрузки статистики игрока', 'error');
      return;
    }

    const u = res.data.user;
    const prof = u.profile || u;
    const st = prof.stats || u.stats || {};
    const mats = prof.materials || u.materials || {};
    const zen = prof.zenGarden || u.zenGarden || {};
    const scores = u.scores || [];

    const idInput = document.getElementById('stats-player-id');
    if (idInput) idInput.value = u.id;

    document.getElementById('stats-player-username').textContent = u.username;
    document.getElementById('stats-player-id-line').textContent = `#${u.id} (${prof.theme || 'classic'})`;
    document.getElementById('stats-player-created').textContent = u.createdAt || '—';
    document.getElementById('stats-player-login').textContent = u.lastLogin || '—';

    let badge = '<span class="badge badge-success">Активен</span>';
    if (u.isBanned) badge = '<span class="badge badge-danger">🚫 Заблокирован</span>';
    else if (u.isAdmin) badge = '<span class="badge badge-warning">⭐ Администратор</span>';
    document.getElementById('stats-player-badge').innerHTML = badge;

    // Lifetime Stats
    document.getElementById('stats-zombies-killed').textContent = (st.zombiesKilled || 0).toLocaleString('ru-RU');
    document.getElementById('stats-sun-produced').textContent = (st.sunProduced || 0).toLocaleString('ru-RU');
    document.getElementById('stats-plants-planted').textContent = (st.plantsPlanted || 0).toLocaleString('ru-RU');
    document.getElementById('stats-levels-cleared').textContent = `${st.levelsCompleted || 0} (макс. ${prof.maxUnlockedLevel || 1})`;
    document.getElementById('stats-coins-earned').textContent = (st.coinsEarned || prof.coins || 0).toLocaleString('ru-RU');

    // Resources
    document.getElementById('stats-coins-val').textContent = (prof.coins ?? 150).toLocaleString('ru-RU');
    document.getElementById('stats-biohumus-val').textContent = (mats.bioHumus || 0).toLocaleString('ru-RU');
    document.getElementById('stats-scrap-val').textContent = (mats.scrapMetal || 0).toLocaleString('ru-RU');
    document.getElementById('stats-essence-val').textContent = (mats.sunEssence || 0).toLocaleString('ru-RU');
    document.getElementById('stats-crystals-val').textContent = (mats.crystals || 0).toLocaleString('ru-RU');

    // Zen & Scores Summary
    const potsCount = Array.isArray(zen.pots) ? zen.pots.filter(p => p && p.plantType).length : 0;
    const snailState = zen.snail?.isAwake ? '🐌 Стинки бодрствует' : '🐌 Стинки спит';
    document.getElementById('stats-zen-summary').innerHTML = `
      Удобрений: <b>${zen.fertilizerCount ?? 0}</b> | Шоколада: <b>${zen.chocolateCount ?? 0}</b><br>
      Растений: <b>${potsCount}</b> шт. | ${snailState}
    `;

    let scoreTxt = `Кампания: <b>${(prof.highScore || 0).toLocaleString('ru-RU')}</b>`;
    if (scores.length > 0) {
      scoreTxt += '<br>' + scores.slice(0, 2).map(s => `${s.mode}: <b>${s.score}</b>`).join(' | ');
    }
    document.getElementById('stats-scores-summary').innerHTML = scoreTxt;

    document.getElementById('modal-player-stats').classList.add('active');
  }

  async openEditPlayerModal(userId) {
    const res = await this.apiRequest(`/api/admin/user/${userId}`);
    if (!res.ok || !res.data.success) {
      this.showToast('Ошибка загрузки профиля игрока', 'error');
      return;
    }

    const u = res.data.user;
    const prof = u.profile || u;
    const mats = prof.materials || u.materials || {};
    const zen = prof.zenGarden || u.zenGarden || {};

    document.getElementById('edit-player-id').value = u.id;
    document.getElementById('edit-player-title-name').textContent = u.username;
    document.getElementById('edit-player-coins').value = prof.coins ?? u.coins ?? 150;
    document.getElementById('edit-player-level').value = prof.level ?? u.level ?? 1;
    document.getElementById('edit-player-maxlevel').value = prof.maxUnlockedLevel ?? u.maxUnlockedLevel ?? 1;
    document.getElementById('edit-player-highscore').value = prof.highScore ?? u.highScore ?? 0;
    document.getElementById('edit-player-theme').value = prof.theme || u.theme || 'classic';

    // Materials
    document.getElementById('edit-player-mat-bioHumus').value = mats.bioHumus ?? 0;
    document.getElementById('edit-player-mat-scrapMetal').value = mats.scrapMetal ?? 0;
    document.getElementById('edit-player-mat-sunEssence').value = mats.sunEssence ?? 0;
    document.getElementById('edit-player-mat-crystals').value = mats.crystals ?? 0;

    // Zen Garden
    document.getElementById('edit-player-zen-fertilizer').value = zen.fertilizerCount ?? 5;
    document.getElementById('edit-player-zen-chocolate').value = zen.chocolateCount ?? 2;

    document.getElementById('edit-player-is-admin').checked = !!u.isAdmin;
    document.getElementById('edit-player-is-banned').checked = !!u.isBanned;
    document.getElementById('edit-player-ban-reason').value = u.banReason || '';

    const banCont = document.getElementById('edit-ban-reason-container');
    if (banCont) banCont.style.display = u.isBanned ? 'block' : 'none';

    document.getElementById('modal-edit-player').classList.add('active');
  }

  async savePlayerEdit() {
    const id = document.getElementById('edit-player-id').value;
    const updates = {
      coins: parseInt(document.getElementById('edit-player-coins').value, 10) || 0,
      level: parseInt(document.getElementById('edit-player-level').value, 10) || 1,
      max_unlocked_level: parseInt(document.getElementById('edit-player-maxlevel').value, 10) || 1,
      maxUnlockedLevel: parseInt(document.getElementById('edit-player-maxlevel').value, 10) || 1,
      high_score: parseInt(document.getElementById('edit-player-highscore').value, 10) || 0,
      highScore: parseInt(document.getElementById('edit-player-highscore').value, 10) || 0,
      theme: document.getElementById('edit-player-theme').value,
      materials: {
        bioHumus: parseInt(document.getElementById('edit-player-mat-bioHumus').value, 10) || 0,
        scrapMetal: parseInt(document.getElementById('edit-player-mat-scrapMetal').value, 10) || 0,
        sunEssence: parseInt(document.getElementById('edit-player-mat-sunEssence').value, 10) || 0,
        crystals: parseInt(document.getElementById('edit-player-mat-crystals').value, 10) || 0
      },
      zenGarden: {
        fertilizerCount: parseInt(document.getElementById('edit-player-zen-fertilizer').value, 10) || 0,
        chocolateCount: parseInt(document.getElementById('edit-player-zen-chocolate').value, 10) || 0
      },
      is_admin: document.getElementById('edit-player-is-admin').checked ? 1 : 0,
      isAdmin: document.getElementById('edit-player-is-admin').checked,
      is_banned: document.getElementById('edit-player-is-banned').checked ? 1 : 0,
      isBanned: document.getElementById('edit-player-is-banned').checked,
      ban_reason: document.getElementById('edit-player-ban-reason').value.trim(),
      banReason: document.getElementById('edit-player-ban-reason').value.trim()
    };

    const res = await this.apiRequest(`/api/admin/user/${id}/edit`, 'POST', { updates });
    if (res.ok && res.data.success) {
      this.showToast('Профиль игрока и ресурсы успешно обновлены!', 'success');
      document.getElementById('modal-edit-player').classList.remove('active');
      this.loadUsers();
      this.loadStats();
    } else {
      this.showToast(res.data.message || 'Ошибка сохранения', 'error');
    }
  }

  async createPlayer() {
    const username = document.getElementById('create-player-username').value.trim();
    const password = document.getElementById('create-player-password').value.trim();
    const coins = parseInt(document.getElementById('create-player-coins').value, 10) || 150;
    const isAdmin = document.getElementById('create-player-is-admin').checked;

    if (!username || !password) {
      this.showToast('Укажите имя пользователя и пароль', 'warn');
      return;
    }

    const res = await this.apiRequest('/api/admin/user/create', 'POST', {
      username,
      password,
      isAdmin,
      initialData: { coins, level: 1, maxUnlockedLevel: 1 }
    });

    if (res.ok && res.data.success) {
      this.showToast(`Игрок ${username} создан!`, 'success');
      document.getElementById('modal-create-player').classList.remove('active');
      document.getElementById('create-player-username').value = '';
      document.getElementById('create-player-password').value = '';
      this.loadUsers();
      this.loadStats();
    } else {
      this.showToast(res.data.message || 'Ошибка создания игрока', 'error');
    }
  }

  openResetPasswordModal(id, username) {
    document.getElementById('reset-pwd-user-id').value = id;
    document.getElementById('reset-pwd-username').textContent = username;
    document.getElementById('reset-pwd-input').value = '';
    document.getElementById('modal-reset-password').classList.add('active');
  }

  async submitResetPassword() {
    const id = document.getElementById('reset-pwd-user-id').value;
    const pwd = document.getElementById('reset-pwd-input').value.trim();
    if (!pwd) {
      this.showToast('Введите новый пароль', 'warn');
      return;
    }

    const res = await this.apiRequest(`/api/admin/user/${id}/password`, 'POST', { password: pwd });
    if (res.ok && res.data.success) {
      this.showToast('Пароль успешно сброшен', 'success');
      document.getElementById('modal-reset-password').classList.remove('active');
    } else {
      this.showToast(res.data.message || 'Ошибка сброса пароля', 'error');
    }
  }

  async deletePlayer(id, username) {
    if (!confirm(`Вы действительно хотите удалить игрока "${username}" (#${id}) и все его данные безвозвратно?`)) {
      return;
    }

    const res = await this.apiRequest(`/api/admin/user/${id}/delete`, 'POST');
    if (res.ok && res.data.success) {
      this.showToast(`Игрок ${username} удален`, 'success');
      this.loadUsers();
      this.loadStats();
      this.loadSessions();
    } else {
      this.showToast(res.data.message || 'Ошибка удаления', 'error');
    }
  }

  // ==========================================
  // BUGS MODERATION
  // ==========================================
  renderBugsTable() {
    const tbody = document.getElementById('bugs-table-body');
    if (!tbody) return;

    const filterStatus = document.getElementById('bug-filter-status')?.value || 'all';
    const filterCat = document.getElementById('bug-filter-category')?.value || 'all';

    let list = [...this.bugs];
    if (filterStatus !== 'all') list = list.filter(b => b.status === filterStatus);
    if (filterCat !== 'all') list = list.filter(b => b.category === filterCat);

    const badge = document.getElementById('badge-bugs-count');
    if (badge) {
      const newCount = this.bugs.filter(b => b.status === 'новый').length;
      badge.textContent = newCount;
      badge.style.display = newCount > 0 ? 'inline-block' : 'none';
    }

    if (list.length === 0) {
      tbody.innerHTML = `<tr><td colspan="8" style="text-align:center; color: var(--text-dim); padding: 24px;">Баг-репорты не найдены</td></tr>`;
      return;
    }

    tbody.innerHTML = '';
    list.forEach(b => {
      const tr = document.createElement('tr');
      
      let stBadge = `<span class="badge badge-muted">${b.status}</span>`;
      if (b.status === 'новый') stBadge = '<span class="badge badge-danger">🔴 Новый</span>';
      else if (b.status === 'в работе') stBadge = '<span class="badge badge-warning">🟡 В работе</span>';
      else if (b.status === 'исправлено') stBadge = '<span class="badge badge-success">✅ Исправлено</span>';
      else if (b.status === 'отклонено') stBadge = '<span class="badge badge-muted">⚪ Отклонено</span>';

      tr.innerHTML = `
        <td><span style="font-family:monospace;">#${b.id}</span></td>
        <td style="font-size:12px; color:var(--text-dim);">${b.timestamp || '—'}</td>
        <td><b style="color:var(--text-main);">${b.author || 'Гость'}</b></td>
        <td><span class="badge badge-info">${b.category || 'bug'}</span></td>
        <td>${stBadge}</td>
        <td style="max-width:280px; font-size:12px;">${b.text}</td>
        <td style="max-width:220px; font-size:12px; color:#a5d6a7;">${b.adminReply || '—'}</td>
        <td>
          <button class="btn btn-secondary btn-sm btn-moderate-bug">🛠️ Ответ</button>
        </td>
      `;

      tr.querySelector('.btn-moderate-bug').addEventListener('click', () => this.openModerateBugModal(b));
      tbody.appendChild(tr);
    });
  }

  openModerateBugModal(b) {
    document.getElementById('bug-mod-id').textContent = b.id;
    document.getElementById('bug-mod-meta').textContent = `Автор: ${b.author} | Категория: ${b.category} | Дата: ${b.timestamp}`;
    document.getElementById('bug-mod-text').textContent = b.text;
    document.getElementById('bug-mod-status').value = b.status || 'новый';
    document.getElementById('bug-mod-reply').value = b.adminReply || '';

    document.getElementById('modal-moderate-bug').classList.add('active');
  }

  async saveBugModeration() {
    const id = parseInt(document.getElementById('bug-mod-id').textContent, 10);
    const status = document.getElementById('bug-mod-status').value;
    const adminReply = document.getElementById('bug-mod-reply').value.trim();

    const res = await this.apiRequest(`/api/admin/bugs/${id}/status`, 'POST', { status, adminReply });
    if (res.ok && res.data.success) {
      this.showToast(`Баг #${id} обновлен`, 'success');
      document.getElementById('modal-moderate-bug').classList.remove('active');
      this.loadBugs();
    } else {
      this.showToast(res.data.message || 'Ошибка сохранения', 'error');
    }
  }

  async deleteBug() {
    const id = parseInt(document.getElementById('bug-mod-id').textContent, 10);
    if (!confirm(`Удалить баг-репорт #${id}?`)) return;

    const res = await this.apiRequest(`/api/admin/bugs/${id}/status`, 'POST', { delete: true });
    if (res.ok && res.data.success) {
      this.showToast(`Баг #${id} удален`, 'success');
      document.getElementById('modal-moderate-bug').classList.remove('active');
      this.loadBugs();
    } else {
      this.showToast(res.data.message || 'Ошибка удаления', 'error');
    }
  }

  // ==========================================
  // CONFIG PRESETS & BALANCE SAVE
  // ==========================================
  async applyPreset(presetName) {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }

    const res = await this.apiRequest('/api/admin/config', 'POST', { applyPreset: presetName });
    if (res.ok && res.data.success) {
      this.showToast(`Пресет "${presetName}" успешно активирован на сервере!`, 'success');
      this.config = res.data.config;
      this.populateUIFromConfig();
      this.loadStats();
    } else {
      this.showToast(res.data.message || 'Ошибка применения пресета', 'error');
    }
  }

  async saveBalanceSection(sectionName) {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }

    if (!this.config) this.config = {};

    if (sectionName === 'economy') {
      this.config.economy = {
        sunMultiplier: parseFloat(document.getElementById('econ-sunMultiplier').value),
        startingSun: parseInt(document.getElementById('econ-startingSun').value, 10),
        coinDropRate: parseFloat(document.getElementById('econ-coinDropRate').value),
        sunDropRate: parseFloat(document.getElementById('econ-sunDropRate').value),
        plantCostMultiplier: parseFloat(document.getElementById('econ-plantCostMultiplier').value),
        upgradeCostMultiplier: parseFloat(document.getElementById('econ-upgradeCostMultiplier').value)
      };
    } else if (sectionName === 'zombies') {
      this.config.zombies = {
        hpMultiplier: parseFloat(document.getElementById('zom-hpMultiplier').value),
        speedMultiplier: parseFloat(document.getElementById('zom-speedMultiplier').value),
        damageMultiplier: parseFloat(document.getElementById('zom-damageMultiplier').value),
        waveDensityMultiplier: parseFloat(document.getElementById('zom-waveDensityMultiplier').value)
      };
    } else if (sectionName === 'plants') {
      this.config.plants = {
        damageMultiplier: parseFloat(document.getElementById('plant-damageMultiplier').value),
        hpMultiplier: parseFloat(document.getElementById('plant-hpMultiplier').value),
        cooldownMultiplier: parseFloat(document.getElementById('plant-cooldownMultiplier').value),
        sunProduceIntervalMultiplier: parseFloat(document.getElementById('plant-sunProduceIntervalMultiplier').value)
      };
    } else if (sectionName === 'zenGarden') {
      this.config.zenGarden = {
        dropRateMultiplier: parseFloat(document.getElementById('zen-dropRateMultiplier').value),
        growthRateMultiplier: parseFloat(document.getElementById('zen-growthRateMultiplier').value),
        fertilizerMultiplier: parseFloat(document.getElementById('zen-fertilizerMultiplier').value),
        waterIntervalMinutes: parseInt(document.getElementById('zen-waterIntervalMinutes').value, 10)
      };
    } else if (sectionName === 'events') {
      this.config.events = {
        doubleGold: document.getElementById('event-doubleGold').checked,
        fastCooldowns: document.getElementById('event-fastCooldowns').checked,
        infiniteSun: document.getElementById('event-infiniteSun').checked,
        turboZombies: document.getElementById('event-turboZombies').checked,
        activeEventName: 'custom'
      };
    }

    this.config.preset = 'Кастомный (Custom)';

    const res = await this.apiRequest('/api/admin/config', 'POST', { config: this.config });
    if (res.ok && res.data.success) {
      this.showToast(`Параметры раздела "${sectionName}" сохранены!`, 'success');
      this.loadStats();
    } else {
      this.showToast(res.data.message || 'Ошибка сохранения', 'error');
    }
  }

  // ==========================================
  // BACKUPS EXPORT & IMPORT
  // ==========================================
  async exportBackup() {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }

    const res = await this.apiRequest('/api/admin/backup/export');
    if (res.ok && res.data.success) {
      const dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(res.data.data, null, 2));
      const downloadAnchor = document.createElement('a');
      const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
      downloadAnchor.setAttribute("href", dataStr);
      downloadAnchor.setAttribute("download", `pvz_full_backup_${timestamp}.json`);
      document.body.appendChild(downloadAnchor);
      downloadAnchor.click();
      downloadAnchor.remove();
      this.showToast('Резервная копия успешно выгружена!', 'success');
    } else {
      this.showToast(res.data.message || 'Ошибка выгрузки бэкапа', 'error');
    }
  }

  async importBackup(file) {
    if (!this.isAuthenticated) {
      this.showToast('Необходима авторизация администратора', 'warn');
      return;
    }

    const reader = new FileReader();
    reader.onload = async (e) => {
      try {
        const jsonData = JSON.parse(e.target.result);
        if (!confirm(`Вы действительно хотите восстановить базу данных из бэкапа "${file.name}"? Текущие данные будут перезаписаны!`)) {
          return;
        }

        const res = await this.apiRequest('/api/admin/backup/import', 'POST', { data: jsonData });
        if (res.ok && res.data.success) {
          this.showToast('База данных успешно восстановлена!', 'success');
          this.loadAllData();
        } else {
          this.showToast(res.data.message || 'Ошибка импорта бэкапа', 'error');
        }
      } catch (err) {
        this.showToast('Неверный формат JSON файла бэкапа', 'error');
      }
    };
    reader.readAsText(file);
  }

  // ==========================================
  // EVENT BINDINGS
  // ==========================================
  bindEvents() {
    // Navigation Tabs
    document.querySelectorAll('.nav-tab-btn').forEach(btn => {
      btn.addEventListener('click', () => {
        document.querySelectorAll('.nav-tab-btn').forEach(b => b.classList.remove('active'));
        document.querySelectorAll('.tab-pane').forEach(p => p.classList.remove('active'));

        btn.classList.add('active');
        const target = btn.getAttribute('data-tab');
        const pane = document.getElementById(target);
        if (pane) pane.classList.add('active');
        this.activeTab = target;

        if (target === 'tab-levels' && this.levels.length === 0) this.loadCampaignLevels();
        if (target === 'tab-sessions') this.loadSessions();
        if (target === 'tab-logs') this.loadLoginLogs();
      });
    });

    // Login modal
    document.getElementById('btn-login-modal-open').addEventListener('click', () => {
      document.getElementById('login-error-msg').style.display = 'none';
      document.getElementById('admin-password-input').value = '';
      document.getElementById('modal-login').classList.add('active');
    });

    document.getElementById('btn-submit-login').addEventListener('click', async () => {
      const pwd = document.getElementById('admin-password-input').value.trim();
      if (!pwd) return;

      const res = await this.apiRequest('/api/admin/auth', 'POST', { password: pwd });
      if (res.ok && res.data.success) {
        this.token = res.data.token;
        localStorage.setItem('pvz_admin_token', this.token);
        this.onAuthenticated();
        document.getElementById('modal-login').classList.remove('active');
        this.showToast('Авторизация администратора успешна!', 'success');
      } else {
        const err = document.getElementById('login-error-msg');
        err.textContent = res.data.message || 'Неверный пароль администратора';
        err.style.display = 'block';
      }
    });

    // Change Admin Password Modal
    const btnOpenPwd = document.getElementById('btn-admin-password-modal-open');
    if (btnOpenPwd) {
      btnOpenPwd.addEventListener('click', () => {
        document.getElementById('admin-password-error').style.display = 'none';
        document.getElementById('admin-current-password').value = '';
        document.getElementById('admin-new-password').value = '';
        document.getElementById('admin-confirm-password').value = '';
        document.getElementById('modal-admin-password').classList.add('active');
      });
    }

    const btnSubmitPwd = document.getElementById('btn-submit-change-admin-password');
    if (btnSubmitPwd) {
      btnSubmitPwd.addEventListener('click', () => this.changeAdminPassword());
    }

    // Logout
    document.getElementById('btn-admin-logout').addEventListener('click', () => {
      this.token = '';
      localStorage.removeItem('pvz_admin_token');
      this.onUnauthenticated();
      this.showToast('Вы вышли из панели администратора', 'info');
    });

    // Close Modals
    document.querySelectorAll('[data-close]').forEach(btn => {
      btn.addEventListener('click', () => {
        const modalId = btn.getAttribute('data-close');
        const modal = document.getElementById(modalId);
        if (modal) modal.classList.remove('active');
      });
    });

    // Campaign Level Editor Actions
    const btnSaveLevel = document.getElementById('btn-save-level');
    if (btnSaveLevel) btnSaveLevel.addEventListener('click', () => this.saveCurrentLevel());

    const btnResetLevel = document.getElementById('btn-reset-level');
    if (btnResetLevel) btnResetLevel.addEventListener('click', () => this.resetCurrentLevel());

    const btnReloadLevels = document.getElementById('btn-reload-levels');
    if (btnReloadLevels) btnReloadLevels.addEventListener('click', () => this.loadCampaignLevels());

    const btnCreateLvl = document.getElementById('btn-create-custom-level');
    if (btnCreateLvl) btnCreateLvl.addEventListener('click', () => this.createNewLevel());

    const btnAddWave = document.getElementById('btn-add-wave');
    if (btnAddWave) btnAddWave.addEventListener('click', () => this.addWave());

    // Dialogue Live Preview Binds
    ['dialogue-speaker', 'dialogue-title', 'dialogue-text', 'dialogue-btn-text'].forEach(id => {
      const el = document.getElementById(id);
      if (el) el.addEventListener('input', () => this.updateDialoguePreview());
    });

    // Sessions Actions
    const btnRefSessions = document.getElementById('btn-refresh-sessions');
    if (btnRefSessions) btnRefSessions.addEventListener('click', () => this.loadSessions());

    const searchSessions = document.getElementById('sessions-search-input');
    if (searchSessions) searchSessions.addEventListener('input', (e) => this.renderSessionsTable(e.target.value));

    // Logs Actions
    const btnRefLogs = document.getElementById('btn-refresh-logs');
    if (btnRefLogs) btnRefLogs.addEventListener('click', () => this.loadLoginLogs());

    ['logs-filter-username', 'logs-filter-ip', 'logs-filter-status'].forEach(id => {
      const el = document.getElementById(id);
      if (el) el.addEventListener('input', () => this.renderLoginLogsTable());
      if (el) el.addEventListener('change', () => this.renderLoginLogsTable());
    });

    // Player Actions
    document.getElementById('btn-create-player-open').addEventListener('click', () => {
      document.getElementById('modal-create-player').classList.add('active');
    });
    document.getElementById('btn-submit-create-player').addEventListener('click', () => this.createPlayer());
    document.getElementById('btn-save-player-edit').addEventListener('click', () => this.savePlayerEdit());
    document.getElementById('btn-submit-reset-pwd').addEventListener('click', () => this.submitResetPassword());
    document.getElementById('btn-refresh-players').addEventListener('click', () => this.loadUsers());
    document.getElementById('player-search-input').addEventListener('input', () => this.renderPlayersTable());
    document.getElementById('player-filter-status').addEventListener('change', () => this.renderPlayersTable());
    document.getElementById('player-sort-select').addEventListener('change', () => this.renderPlayersTable());
    document.getElementById('edit-player-is-banned').addEventListener('change', (e) => {
      document.getElementById('edit-ban-reason-container').style.display = e.target.checked ? 'block' : 'none';
    });

    document.getElementById('btn-stats-jump-edit')?.addEventListener('click', () => {
      const id = document.getElementById('stats-player-id')?.value;
      const modal = document.getElementById('modal-player-stats');
      if (modal) modal.classList.remove('active');
      if (id) this.openEditPlayerModal(id);
    });

    // Balance Save Buttons
    document.getElementById('btn-save-economy').addEventListener('click', () => this.saveBalanceSection('economy'));
    document.getElementById('btn-save-zombies').addEventListener('click', () => this.saveBalanceSection('zombies'));
    document.getElementById('btn-save-plants').addEventListener('click', () => this.saveBalanceSection('plants'));
    document.getElementById('btn-save-zengarden').addEventListener('click', () => this.saveBalanceSection('zenGarden'));
    document.getElementById('btn-save-events-quick').addEventListener('click', () => this.saveBalanceSection('events'));

    // Presets
    document.querySelectorAll('.btn-apply-preset').forEach(btn => {
      btn.addEventListener('click', () => {
        const preset = btn.getAttribute('data-preset');
        this.applyPreset(preset);
      });
    });

    // Bugs Actions
    document.getElementById('btn-refresh-bugs').addEventListener('click', () => this.loadBugs());
    document.getElementById('bug-filter-status').addEventListener('change', () => this.renderBugsTable());
    document.getElementById('bug-filter-category').addEventListener('change', () => this.renderBugsTable());
    document.getElementById('btn-bug-mod-save').addEventListener('click', () => this.saveBugModeration());
    document.getElementById('btn-bug-delete').addEventListener('click', () => this.deleteBug());

    // Backups Actions
    document.getElementById('btn-export-backup').addEventListener('click', () => this.exportBackup());
    document.getElementById('btn-trigger-import').addEventListener('click', () => {
      document.getElementById('backup-file-input').click();
    });
    document.getElementById('backup-file-input').addEventListener('change', (e) => {
      if (e.target.files && e.target.files[0]) {
        this.importBackup(e.target.files[0]);
      }
    });
  }
}

// Instantiate on DOM Load
window.addEventListener('DOMContentLoaded', () => {
  window.pvzConfigurator = new PvZConfiguratorApp();
});