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| """ | |
| Application configuration with environment variable support. | |
| """ | |
| import os | |
| from functools import lru_cache | |
| from pydantic_settings import BaseSettings | |
| from typing import Optional | |
| def _default_hf_cache_dir() -> str: | |
| """Prefer persistent storage on HF Spaces when available.""" | |
| if os.path.isdir("/data"): | |
| return "/data/.hf_cache" | |
| return "/app/.hf_cache" | |
| def _default_hf_home() -> str: | |
| """Prefer persistent Hugging Face home on HF Spaces when available.""" | |
| if os.path.isdir("/data"): | |
| return "/data/.cache/huggingface" | |
| return "/app/.hf_cache/hf_home" | |
| class Settings(BaseSettings): | |
| """Application settings loaded from environment variables.""" | |
| # Hugging Face configuration | |
| # Available fusion models: | |
| # - DeepFakeDetector/fusion-logreg-final (Logistic Regression - default) | |
| # - DeepFakeDetector/fusion-meta-final (Meta-classifier) | |
| HF_FUSION_REPO_ID: str = "DeepFakeDetector/fusion-logreg-final" | |
| HF_CACHE_DIR: str = _default_hf_cache_dir() | |
| HF_HOME: str = _default_hf_home() | |
| HF_PERSISTENT_CACHE: bool = True | |
| HF_PERSISTENT_CACHE_ROOT: str = "/data" | |
| HF_TOKEN: Optional[str] = None | |
| # Google Gemini API configuration | |
| GOOGLE_API_KEY: Optional[str] = None | |
| GEMINI_MODEL: str = "gemini-2.5-flash" | |
| def llm_enabled(self) -> bool: | |
| """Check if LLM explanations are available.""" | |
| return self.GOOGLE_API_KEY is not None and len(self.GOOGLE_API_KEY) > 0 | |
| # Application configuration | |
| ENABLE_DEBUG: bool = False | |
| LOG_LEVEL: str = "INFO" | |
| # Server configuration | |
| HOST: str = "0.0.0.0" | |
| PORT: int = 8000 | |
| # CORS configuration | |
| CORS_ORIGINS: str = "http://localhost:5173,http://localhost:3000,https://www.deepfake-detector.app,https://deepfake-detector.app" | |
| def cors_origins_list(self) -> list[str]: | |
| """Parse CORS origins from comma-separated string.""" | |
| return [origin.strip() for origin in self.CORS_ORIGINS.split(",") if origin.strip()] | |
| # API configuration | |
| API_V1_PREFIX: str = "/api/v1" | |
| PROJECT_NAME: str = "DeepFake Detector API" | |
| VERSION: str = "0.1.0" | |
| class Config: | |
| env_file = ".env" | |
| env_file_encoding = "utf-8" | |
| case_sensitive = True | |
| def get_settings() -> Settings: | |
| """Get cached settings instance.""" | |
| return Settings() | |
| settings = get_settings() | |