from functools import lru_cache

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    """Runtime configuration for the Fan Passport API."""

    app_name: str = "Fan Passport API"
    environment: str = "local"
    database_url: str = "sqlite:///./fan_passport.db"
    auto_create_tables: bool = True
    admin_api_key: str | None = None
    enable_dev_auth: bool = True
    cors_origins: list[str] = Field(
        default_factory=lambda: ["http://localhost:5173", "http://127.0.0.1:5173"]
    )

    model_config = SettingsConfigDict(
        env_prefix="FAN_PASSPORT_",
        env_file=".env",
        env_file_encoding="utf-8",
        extra="ignore",
    )

    @property
    def is_localish(self) -> bool:
        return self.environment.lower() in {"local", "test", "development", "dev"}


@lru_cache(maxsize=1)
def get_settings() -> Settings:
    return Settings()