from functools import lru_cache
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", extra="ignore")

    # API
    api_key: str = "changeme-secret-key"
    host: str = "0.0.0.0"
    port: int = 8000
    debug: bool = False

    # Telegram
    telegram_token: str = ""
    telegram_bot_username: str = "mcm_bot"

    # WhatsApp (Green API)
    whatsapp_id_instance: str = ""
    whatsapp_api_token: str = ""

    # SMS / USB-Modem
    sms_port: str = "/dev/ttyUSB0"
    sms_baud_rate: int = 115200
    sms_enabled: bool = False

    # Datenbank
    database_url: str = "sqlite:///./mcm.db"

    # TUI Web-Modus
    web_port: int = 8001

    # Benutzer-Authentifizierung
    secret_key: str = "change-this-secret-key-min-32-chars!!"
    token_expire_hours: int = 24
    default_admin_user: str = "admin"
    default_admin_password: str = "admin"

    @property
    def telegram_enabled(self) -> bool:
        return bool(self.telegram_token)

    @property
    def whatsapp_enabled(self) -> bool:
        return bool(self.whatsapp_id_instance and self.whatsapp_api_token)


@lru_cache
def get_settings() -> Settings:
    return Settings()


settings = get_settings()