"""
Configuration de l'application FastAPI.
"""

from pydantic_settings import BaseSettings
import os


class Settings(BaseSettings):
    """Configuration globale de l'application"""
    
    # Base de données
    db_host: str = os.getenv("DB_HOST", "localhost")
    db_port: int = int(os.getenv("DB_PORT", "3306"))
    db_name: str = os.getenv("DB_NAME", "evoting_db")
    db_user: str = os.getenv("DB_USER", "evoting_user")
    db_password: str = os.getenv("DB_PASSWORD", "evoting_pass123")
    
    # Sécurité
    secret_key: str = os.getenv(
        "SECRET_KEY",
        "your-secret-key-change-in-production-12345"
    )
    algorithm: str = "HS256"
    access_token_expire_minutes: int = 30
    
    # Application
    debug: bool = os.getenv("DEBUG", "false").lower() == "true"
    app_name: str = "E-Voting System API"
    app_version: str = "0.1.0"
    
    # Cryptographie
    elgamal_p: int = 23  # Nombre premier (prototype)
    elgamal_g: int = 5   # Générateur
    
    class Config:
        env_file = ".env"
        case_sensitive = False
        extra = "ignore"  # Ignorer les variables d'env non définies

    @property
    def database_url(self) -> str:
        """Construire l'URL de connection à la base de données"""
        return (
            f"mysql+pymysql://{self.db_user}:{self.db_password}"
            f"@{self.db_host}:{self.db_port}/{self.db_name}"
        )


settings = Settings()