"""
  Centralized configuration management for SearchEngine.
  
  Loads configuration from environment variables and .env file.

  This module provides a single point for loading .env and setting defaults.
  All configuration variables are exported directly - no need for getter functions.

  """
  
  import os
  from pathlib import Path

  from dotenv import load_dotenv
  
  # Load .env file from project root
  PROJECT_ROOT = Path(__file__).parent.parent
  load_dotenv(PROJECT_ROOT / '.env')
  
  
  # Elasticsearch Configuration
  ES_CONFIG = {
      'host': os.getenv('ES_HOST', 'http://localhost:9200'),
      'username': os.getenv('ES_USERNAME'),
      'password': os.getenv('ES_PASSWORD'),
  }
  

  # Runtime environment & index namespace
  # RUNTIME_ENV: 当前运行环境，建议使用 prod / uat / test / dev 等枚举值
  RUNTIME_ENV = os.getenv('RUNTIME_ENV', 'prod')
  # ES_INDEX_NAMESPACE: 用于按环境隔离索引的命名空间前缀，例如 "uat_" / "test_"
  # 为空字符串时表示不加前缀（通常是 prod 环境）
  ES_INDEX_NAMESPACE = os.getenv('ES_INDEX_NAMESPACE')
  if ES_INDEX_NAMESPACE is None:
      # 未显式配置时，非 prod 环境默认加 "<env>_" 前缀，prod 环境默认不加前缀
      ES_INDEX_NAMESPACE = '' if RUNTIME_ENV == 'prod' else f'{RUNTIME_ENV}_'
  

  # Redis Configuration
  REDIS_CONFIG = {
      'host': os.getenv('REDIS_HOST', 'localhost'),
      'port': int(os.getenv('REDIS_PORT', 6479)),

      'snapshot_db': int(os.getenv('REDIS_SNAPSHOT_DB', 0)),
      'password': os.getenv('REDIS_PASSWORD', 'BMfv5aI31kgHWtlx'),
      'socket_timeout': int(os.getenv('REDIS_SOCKET_TIMEOUT', 1)),
      'socket_connect_timeout': int(os.getenv('REDIS_SOCKET_CONNECT_TIMEOUT', 1)),
      'retry_on_timeout': os.getenv('REDIS_RETRY_ON_TIMEOUT', 'False').lower() == 'true',

      'cache_expire_days': int(os.getenv('REDIS_CACHE_EXPIRE_DAYS', 360*2)),  # 6 months
      'translation_cache_expire_days': int(os.getenv('REDIS_TRANSLATION_CACHE_EXPIRE_DAYS', 360*2)),

      'translation_cache_prefix': os.getenv('REDIS_TRANSLATION_CACHE_PREFIX', 'trans'),

  }
  
  # DeepL API Key
  DEEPL_AUTH_KEY = os.getenv('DEEPL_AUTH_KEY')
  

  # DashScope API Key (for Qwen models)
  DASHSCOPE_API_KEY = os.getenv('DASHSCOPE_API_KEY')
  

  # API Service Configuration
  API_HOST = os.getenv('API_HOST', '0.0.0.0')

  API_PORT = int(os.getenv('API_PORT', 6002))

  # API_BASE_URL: 如果未设置，根据API_HOST构建（0.0.0.0使用localhost）
  API_BASE_URL = os.getenv('API_BASE_URL')
  if not API_BASE_URL:
      API_BASE_URL = f'http://localhost:{API_PORT}' if API_HOST == '0.0.0.0' else f'http://{API_HOST}:{API_PORT}'

  
  # Model Directories
  TEXT_MODEL_DIR = os.getenv('TEXT_MODEL_DIR', '/data/tw/models/bge-m3')
  IMAGE_MODEL_DIR = os.getenv('IMAGE_MODEL_DIR', '/data/tw/models/cn-clip')
  
  # Cache Directory
  CACHE_DIR = os.getenv('CACHE_DIR', '.cache')
  

  # MySQL Database Configuration (Shoplazza)
  DB_CONFIG = {

      'host': os.getenv('DB_HOST'),
      'port': int(os.getenv('DB_PORT', 3306)) if os.getenv('DB_PORT') else 3306,
      'database': os.getenv('DB_DATABASE'),
      'username': os.getenv('DB_USERNAME'),
      'password': os.getenv('DB_PASSWORD'),

  }
  

  def print_config():
      """Print current configuration (with sensitive data masked)."""
      print("=" * 60)
      print("SearchEngine Configuration")
      print("=" * 60)
  
      print("\nElasticsearch:")
      print(f"  Host: {ES_CONFIG['host']}")
      print(f"  Username: {ES_CONFIG['username']}")
      print(f"  Password: {'*' * 10 if ES_CONFIG['password'] else 'None'}")
  
      print("\nRedis:")
      print(f"  Host: {REDIS_CONFIG['host']}")
      print(f"  Port: {REDIS_CONFIG['port']}")
      print(f"  Password: {'*' * 10 if REDIS_CONFIG['password'] else 'None'}")
  
      print("\nDeepL:")
      print(f"  API Key: {'*' * 10 if DEEPL_AUTH_KEY else 'None (translation disabled)'}")
  

      print("\nAPI Service:")
      print(f"  Host: {API_HOST}")
      print(f"  Port: {API_PORT}")
  
      print("\nModels:")
      print(f"  Text Model: {TEXT_MODEL_DIR}")
      print(f"  Image Model: {IMAGE_MODEL_DIR}")
  
      print("\nCache:")
      print(f"  Cache Directory: {CACHE_DIR}")
  

      print("\nMySQL Database:")
      print(f"  Host: {DB_CONFIG['host']}")
      print(f"  Port: {DB_CONFIG['port']}")
      print(f"  Database: {DB_CONFIG['database']}")
      print(f"  Username: {DB_CONFIG['username']}")
      print(f"  Password: {'*' * 10 if DB_CONFIG['password'] else 'None'}")
  

      print("=" * 60)
  
  
  if __name__ == "__main__":
      print_config()