"""Application settings."""

from functools import lru_cache

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    """Runtime settings loaded from environment variables."""

    app_name: str = "temporal-image-pipeline"
    api_prefix: str = "/api/v1"
    debug: bool = False
    auto_create_tables: bool = True
    database_url: str = "sqlite+aiosqlite:///./temporal_demo.db"
    temporal_address: str = "localhost:7233"
    temporal_namespace: str = "default"

    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        case_sensitive=False,
    )

    @property
    def sync_database_url(self) -> str:
        """Return a synchronous SQLAlchemy URL for migrations."""

        return self.database_url.replace("+aiosqlite", "")


@lru_cache(maxsize=1)
def get_settings() -> Settings:
    """Return the cached application settings."""

    return Settings()