// Leaderboard & High Score Registry System
window.LeaderboardSystem = class LeaderboardSystem {
  constructor() {
    this.selectedMode = 'survival'; // default tab

    // High score records per mode
    this.records = {
      adventure: [
        { name: 'Безумный Дэйв', score: 10, detail: 'Уровень 10 (Пройдено)', date: '2026-09-01' },
        { name: 'Сосед Боб', score: 8, detail: 'Уровень 8', date: '2026-09-10' },
        { name: 'Пенни', score: 5, detail: 'Уровень 5', date: '2026-09-12' }
      ],
      survival: [
        { name: 'Безумный Дэйв', score: 32, detail: '32 Флага', date: '2026-09-02' },
        { name: 'Зомби Йети', score: 18, detail: '18 Флагов', date: '2026-09-05' },
        { name: 'Пенни', score: 12, detail: '12 Флагов', date: '2026-09-11' }
      ],
      roguelike: [
        { name: 'Безумный Дэйв', score: 14, detail: '14 Этажей (6 Реликвий)', date: '2026-09-03' },
        { name: 'Сосед Боб', score: 9, detail: '9 Этажей', date: '2026-09-08' },
        { name: 'Пенни', score: 6, detail: '6 Этажей', date: '2026-09-14' }
      ],
      izombie: [
        { name: 'Доктор Зомбосс', score: 50, detail: '50 Мозгов съедено', date: '2026-09-04' },
        { name: 'Футболист Зомби', score: 25, detail: '25 Мозгов', date: '2026-09-09' },
        { name: 'Обычный Зомби', score: 15, detail: '15 Мозгов', date: '2026-09-13' }
      ],
      bowling: [
        { name: 'Безумный Дэйв', score: 6800, detail: '6800 очков (Страйк x8)', date: '2026-09-06' },
        { name: 'Пенни', score: 4500, detail: '4500 очков', date: '2026-09-07' },
        { name: 'Сосед Боб', score: 3200, detail: '3200 очков', date: '2026-09-15' }
      ],
      boss: [
        { name: 'Безумный Дэйв', score: 1, detail: 'Побежден за 2 мин 15 сек', date: '2026-09-15' }
      ],
      bossrush: [
        { name: 'Безумный Дэйв', score: 3, detail: 'Boss Rush завершен! (3 волны)', date: '2026-09-16' },
        { name: 'Сосед Боб', score: 2, detail: '2 волны', date: '2026-09-16' }
      ]
    };

    this.loadFromAuth();
    this.fetchAllLeaderboards();
  }

  loadFromAuth() {
    if (window.PvZAuth) {
      const uData = window.PvZAuth.getUserData();
      if (uData.leaderboards) {
        this.records = { ...this.records, ...uData.leaderboards };
      }
    }
  }

  saveToAuth() {
    if (window.PvZAuth && !window.PvZAuth.isGuest()) {
      window.PvZAuth.saveUserData({
        leaderboards: this.records
      });
    }
  }

  async fetchAllLeaderboards() {
    try {
      const resp = await fetch('/api/leaderboard');
      if (resp.ok) {
        const json = await resp.json();
        if (json && json.success && json.records) {
          for (const [mode, rows] of Object.entries(json.records)) {
            if (Array.isArray(rows) && rows.length > 0) {
              this.mergeServerRecords(mode, rows);
            }
          }
          if (window._pvzEngine && typeof window._pvzEngine.renderLeaderboardUI === 'function') {
            window._pvzEngine.renderLeaderboardUI(this.selectedMode);
          }
        }
      }
    } catch (_) {}
  }

  async fetchLeaderboard(mode) {
    try {
      const resp = await fetch(`/api/leaderboard?mode=${encodeURIComponent(mode)}`);
      if (resp.ok) {
        const json = await resp.json();
        if (json && json.success && Array.isArray(json.records)) {
          this.mergeServerRecords(mode, json.records);
          if (window._pvzEngine && typeof window._pvzEngine.renderLeaderboardUI === 'function') {
            window._pvzEngine.renderLeaderboardUI(mode);
          }
        }
      }
    } catch (_) {}
  }

  mergeServerRecords(mode, serverRows) {
    if (!this.records[mode]) {
      this.records[mode] = [];
    }
    const combined = [...this.records[mode]];
    for (const sr of serverRows) {
      const existing = combined.find(r => r.name === sr.name);
      if (existing) {
        if (sr.score > existing.score) {
          existing.score = sr.score;
          existing.detail = sr.detail;
          existing.date = sr.date;
        }
      } else {
        combined.push({
          name: sr.name,
          score: sr.score,
          detail: sr.detail,
          date: sr.date
        });
      }
    }
    combined.sort((a, b) => b.score - a.score);
    this.records[mode] = combined.slice(0, 10);
  }

  submitScore(mode, score, detail = '') {
    if (!this.records[mode]) {
      this.records[mode] = [];
    }

    let playerName = 'Игрок';
    let token = null;
    if (window.PvZAuth) {
      playerName = window.PvZAuth.getCurrentUser();
      if (window.PvZAuth.isGuest()) playerName = 'Гость';
      token = window.PvZAuth.getToken();
    }

    const today = new Date().toISOString().slice(0, 10);

    // Check if player already on this board
    const existing = this.records[mode].find(r => r.name === playerName);
    if (existing) {
      if (score > existing.score) {
        existing.score = score;
        existing.detail = detail || `${score} очков`;
        existing.date = today;
      }
    } else {
      this.records[mode].push({
        name: playerName,
        score,
        detail: detail || `${score} очков`,
        date: today
      });
    }

    // Sort descending
    this.records[mode].sort((a, b) => b.score - a.score);
    // Keep top 10
    this.records[mode] = this.records[mode].slice(0, 10);
    this.saveToAuth();

    // Submit to server leaderboard asynchronously
    try {
      const headers = { 'Content-Type': 'application/json' };
      if (token) headers['Authorization'] = `Bearer ${token}`;
      fetch('/api/leaderboard', {
        method: 'POST',
        headers,
        body: JSON.stringify({
          mode,
          score,
          detail: detail || `${score} очков`,
          name: playerName,
          token
        })
      }).then(r => r.json()).catch(() => {});
    } catch (_) {}
  }

  getEntries(mode) {
    return this.records[mode] || [];
  }
};