from pydantic_settings import BaseSettings
from functools import lru_cache


class Settings(BaseSettings):
    # Database
    database_url: str = "postgresql://booking:booking2026@db:5432/booking"

    # App
    app_name: str = "BookingService"
    app_url: str = "https://booking.scan360.app"
    api_key: str = "changeme"
    cors_origins: list[str] = ["https://farmaciaianni.it", "http://localhost:3000"]

    # Google OAuth
    google_client_id: str = ""
    google_client_secret: str = ""
    google_redirect_uri: str = "https://booking.scan360.app/auth/callback"
    allowed_domains: str = "kitzanos.com,farmaciaianni.it"

    # JWT
    jwt_secret: str = "xab-booking-jwt-secret-2026"
    jwt_algorithm: str = "HS256"
    jwt_expire_hours: int = 24

    # Google Calendar
    google_credentials_json: str = ""

    # Notifications
    smtp_host: str = "smtp.gmail.com"
    smtp_port: int = 587
    smtp_user: str = ""
    smtp_pass: str = ""
    smtp_from: str = "prenotazioni@farmaciaianni.it"

    # WhatsApp gateway
    wa_gateway_url: str = "http://host.docker.internal:18800/api/wa/send"
    wa_enabled: bool = True

    # Timezone
    timezone: str = "Europe/Rome"

    model_config = {"env_prefix": "BOOKING_", "env_file": ".env", "extra": "ignore"}

    @property
    def allowed_domains_list(self) -> list[str]:
        return [d.strip() for d in self.allowed_domains.split(",") if d.strip()]


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