"""Configuration management using Pydantic Settings."""
from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""
    
    # Service Info
    service_name: str = "mve-incrementables-parser"
    service_version: str = "1.0.0"
    
    # Authentication
    auth_username: str
    auth_password_hash: str
    jwt_secret: str
    jwt_expires_minutes: int = 60
    jwt_algorithm: str = "HS256"
    
    # File Upload
    max_file_mb: int = 10
    
    # Logging
    log_level: str = "INFO"
    
    # Redis/Celery
    redis_url: str = "redis://localhost:6379/0"
    celery_broker_url: str = "redis://localhost:6379/0"
    celery_result_backend: str = "redis://localhost:6379/0"
    
    class Config:
        env_file = ".env"
        case_sensitive = False


@lru_cache()
def get_settings() -> Settings:
    """Get cached settings instance."""
    return Settings()