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/**
 * ═══════════════════════════════════════════════════════════════════════
 * CLASSE: ConfigManager
 * ═══════════════════════════════════════════════════════════════════════
 * Gerencia todas as configuraΓ§Γ΅es, constantes e variΓ‘veis de ambiente
 * Singleton pattern para acesso global consistente
 * ═══════════════════════════════════════════════════════════════════════
 */

const path = require('path');

class ConfigManager {
  static instance = null;


  constructor() {
    if (ConfigManager.instance) {
      return ConfigManager.instance;
    }

    // ═══ PORTAS E URLS ═══
    this.PORT = parseInt(process.env.PORT || process.env.HF_PORT || 3000);
    this.API_URL = process.env.API_URL || process.env.HF_API_URL || 'https://akra35567-akira-index.hf.space/api/akira';
    this.API_TIMEOUT = parseInt(process.env.API_TIMEOUT || 120000);
    this.API_RETRY_ATTEMPTS = parseInt(process.env.API_RETRY_ATTEMPTS || 3);
    this.API_RETRY_DELAY = parseInt(process.env.API_RETRY_DELAY || 1000);

    // ═══ BOT IDENTITY ═══
    this.BOT_NUMERO_REAL = process.env.BOT_NUMERO || '244937035662';
    this.BOT_NAME = process.env.BOT_NAME || 'Akira';
    this.BOT_VERSION = 'v21.02.2025';
    this.PREFIXO = process.env.PREFIXO || '#';

    // ═══ PATHS E FOLDERS ═══
    // HF SPACES: Usar /tmp para garantir permissΓ΅es de escrita
    // O HF Spaces tem sistema de arquivos somente-leitura em /
    const isHuggingFaceSpace = process.env.HF_SPACE === 'true' || process.env.NODE_ENV === 'production';
    const baseDataPath = isHuggingFaceSpace ? '/tmp/akira_data' : '.';
    
    this.TEMP_FOLDER = process.env.TEMP_FOLDER || path.join(baseDataPath, 'temp');
    this.AUTH_FOLDER = process.env.AUTH_FOLDER || path.join(baseDataPath, 'auth_info_baileys');
    this.DATABASE_FOLDER = process.env.DATABASE_FOLDER || path.join(baseDataPath, 'database');
    this.LOGS_FOLDER = process.env.LOGS_FOLDER || path.join(baseDataPath, 'logs');

    // ═══ STT (SPEECH-TO-TEXT) ═══
    this.DEEPGRAM_API_KEY = process.env.DEEPGRAM_API_KEY || '';
    this.DEEPGRAM_API_URL = 'https://api.deepgram.com/v1/listen';
    this.DEEPGRAM_MODEL = process.env.DEEPGRAM_MODEL || 'nova-2';
    this.STT_LANGUAGE = process.env.STT_LANGUAGE || 'pt';

    // ═══ TTS (TEXT-TO-SPEECH) ═══
    this.TTS_LANGUAGE = process.env.TTS_LANGUAGE || 'pt';
    this.TTS_SLOW = process.env.TTS_SLOW === 'true';

    // ═══ RATE LIMITING ═══
    this.RATE_LIMIT_WINDOW = parseInt(process.env.RATE_LIMIT_WINDOW || 8);
    this.RATE_LIMIT_MAX_CALLS = parseInt(process.env.RATE_LIMIT_MAX_CALLS || 6);

    // ═══ MODERAÇÃO ═══
    this.MUTE_DEFAULT_MINUTES = parseInt(process.env.MUTE_DEFAULT_MINUTES || 5);
    this.MUTE_MAX_DAILY = parseInt(process.env.MUTE_MAX_DAILY || 5);
    this.AUTO_BAN_AFTER_MUTES = parseInt(process.env.AUTO_BAN_AFTER_MUTES || 3);

    // ═══ YOUTUBE DOWNLOAD ═══
    this.YT_MAX_SIZE_MB = parseInt(process.env.YT_MAX_SIZE_MB || 25);
    this.YT_TIMEOUT_MS = parseInt(process.env.YT_TIMEOUT_MS || 60000);
    this.YT_QUALITY = process.env.YT_QUALITY || 'highestaudio';
    this.YT_MAX_DURATION_SECONDS = parseInt(process.env.YT_MAX_DURATION_SECONDS || 3600);

    // ═══ MÍDIA ═══
    this.STICKER_SIZE = parseInt(process.env.STICKER_SIZE || 512);
    this.STICKER_MAX_ANIMATED_SECONDS = parseInt(process.env.STICKER_MAX_ANIMATED_SECONDS || 30);
    this.IMAGE_QUALITY = parseInt(process.env.IMAGE_QUALITY || 85);
    this.MAX_AUDIO_SIZE_MB = parseInt(process.env.MAX_AUDIO_SIZE_MB || 25);

    // ═══ CONVERSAÇÃO ═══
    this.MAX_RESPONSE_CHARS = parseInt(process.env.MAX_RESPONSE_CHARS || 280);
    this.TYPING_SPEED_MS = parseInt(process.env.TYPING_SPEED_MS || 50);
    this.MIN_TYPING_TIME_MS = parseInt(process.env.MIN_TYPING_TIME_MS || 1500);
    this.MAX_TYPING_TIME_MS = parseInt(process.env.MAX_TYPING_TIME_MS || 10000);

    // ═══ CACHE E PERFORMANCE ═══
    this.CACHE_TTL_SECONDS = parseInt(process.env.CACHE_TTL_SECONDS || 3600);
    this.HISTORY_LIMIT_PER_USER = parseInt(process.env.HISTORY_LIMIT_PER_USER || 50);
    this.MESSAGE_DEDUP_TIME_MS = parseInt(process.env.MESSAGE_DEDUP_TIME_MS || 30000);

    // ═══ LOGGING ═══
    this.LOG_LEVEL = process.env.LOG_LEVEL || 'info';
    this.LOG_API_REQUESTS = process.env.LOG_API_REQUESTS !== 'false';
    this.LOG_DETAILED_MESSAGES = process.env.LOG_DETAILED_MESSAGES !== 'false';

    // ═══ PERMISSΓ•ES - DONO(S) ═══
    this.DONO_USERS = [
      { numero: '244937035662', nomeExato: 'Isaac Quarenta' },
      { numero: '244978787009', nomeExato: 'Isaac Quarenta' },
      { numero: '24478787009', nomeExato: 'Isaac Quarenta' }
    ];

    // ═══ FEATURES ═══
    this.FEATURE_STT_ENABLED = process.env.FEATURE_STT !== 'false';
    this.FEATURE_TTS_ENABLED = process.env.FEATURE_TTS !== 'false';
    this.FEATURE_YT_DOWNLOAD = process.env.FEATURE_YT !== 'false';
    this.FEATURE_STICKERS = process.env.FEATURE_STICKERS !== 'false';
    this.FEATURE_MODERATION = process.env.FEATURE_MODERATION !== 'false';
    this.FEATURE_LEVELING = process.env.FEATURE_LEVELING !== 'false';
    this.FEATURE_VISION = process.env.FEATURE_VISION !== 'false';

    ConfigManager.instance = this;
  }

  static getInstance() {
    if (!ConfigManager.instance) {
      new ConfigManager();
    }
    return ConfigManager.instance;
  }

  /**
   * Valida se um usuΓ‘rio Γ© dono do bot
   */
  isDono(numero, nome) {
    try {
      const numeroLimpo = String(numero).trim();
      const nomeLimpo = String(nome).trim();
      return this.DONO_USERS.some(
        dono => numeroLimpo === dono.numero && nomeLimpo === dono.nomeExato
      );
    } catch (e) {
      return false;
    }
  }

  /**
   * Retorna configuraΓ§Γ£o por chave com fallback
   */
  get(key, defaultValue = null) {
    return this[key] !== undefined ? this[key] : defaultValue;
  }

  /**
   * Define configuraΓ§Γ£o dinamicamente
   */
  set(key, value) {
    this[key] = value;
  }

  /**
   * Retorna todas as configuraΓ§Γ΅es (CUIDADO: dados sensΓ­veis)
   */
  getAll(includeSensitive = false) {
    const config = { ...this };
    if (!includeSensitive) {
      delete config.DEEPGRAM_API_KEY;
      delete config.API_URL;
    }
    return config;
  }

  /**
   * Valida configuraΓ§Γ΅es crΓ­ticas na inicializaΓ§Γ£o
   */
  validate() {
    const errors = [];

    if (!this.API_URL) errors.push('API_URL nΓ£o configurada');
    if (!this.BOT_NUMERO_REAL) errors.push('BOT_NUMERO nΓ£o configurada');

    if (this.FEATURE_STT_ENABLED && !this.DEEPGRAM_API_KEY) {
      console.warn('⚠️  STT habilitado mas DEEPGRAM_API_KEY não configurada');
    }

    if (errors.length > 0) {
      console.error('❌ ERROS DE CONFIGURAÇÃO:');
      errors.forEach(e => console.error(`  - ${e}`));
      return false;
    }

    console.log('βœ… ConfiguraΓ§Γ΅es validadas com sucesso');
    return true;
  }

  /**
   * Log com contexto
   */
  logConfig() {
    console.log('\n' + '═'.repeat(70));
    console.log('βš™οΈ  CONFIGURAÇÕES DO BOT');
    console.log('═'.repeat(70));
    console.log(`  πŸ€– Nome: ${this.BOT_NAME}`);
    console.log(`  πŸ“± NΓΊmero: ${this.BOT_NUMERO_REAL}`);
    console.log(`  πŸ“Œ VersΓ£o: ${this.BOT_VERSION}`);
    console.log(`  πŸŽ›οΈ  Prefixo: ${this.PREFIXO}`);
    console.log(`  πŸ”Œ API: ${this.API_URL.substring(0, 50)}...`);
    console.log(`  🎀 STT: ${this.FEATURE_STT_ENABLED ? 'Ativado (Deepgram)' : 'Desativado'}`);
    console.log(`  πŸ”Š TTS: ${this.FEATURE_TTS_ENABLED ? 'Ativado (Google)' : 'Desativado'}`);
    console.log(`  πŸ“₯ YT Download: ${this.FEATURE_YT_DOWNLOAD ? 'Ativado' : 'Desativado'}`);
    console.log(`  🎨 Stickers: ${this.FEATURE_STICKERS ? 'Ativado' : 'Desativado'}`);
    console.log(`  πŸ›‘οΈ  ModeraΓ§Γ£o: ${this.FEATURE_MODERATION ? 'Ativado' : 'Desativado'}`);
    console.log(`  πŸ‘€ Donos: ${this.DONO_USERS.length} configurado(s)`);
    console.log('═'.repeat(70) + '\n');
  }
}

module.exports = ConfigManager;