"""
Application settings for Calejo Control Adapter.
"""

from pydantic_settings import BaseSettings
from typing import Optional


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""
    
    # Database
    database_url: str = "postgresql://control_reader:secure_password@localhost:5432/calejo"
    
    # Protocol endpoints
    opc_ua_endpoint: str = "opc.tcp://0.0.0.0:4840"
    modbus_port: int = 502
    rest_api_port: int = 8080
    
    # Safety settings
    safety_timeout_seconds: int = 1200  # 20 minutes
    
    # Security settings
    jwt_secret_key: str = "your-secret-key-change-in-production"
    jwt_algorithm: str = "HS256"
    
    # Alert settings
    smtp_server: Optional[str] = None
    smtp_port: Optional[int] = 587
    smtp_username: Optional[str] = None
    smtp_password: Optional[str] = None
    twilio_account_sid: Optional[str] = None
    twilio_auth_token: Optional[str] = None
    twilio_phone_number: Optional[str] = None
    
    # Logging
    log_level: str = "INFO"
    
    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"