from functools import lru_cache
from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", case_sensitive=False, extra="ignore")
    app_name: str = Field("AIMNOTE RAG Gateway", env="RAG_GATEWAY_APP_NAME")
    api_prefix: str = "/rag"
    environment: str = Field("development", env="RAG_GATEWAY_ENV")
    lightrag_url: str = Field("http://127.0.0.1:7777", env="LIGHTRAG_URL")
    lightrag_api_key: str = Field("", env="LIGHTRAG_API_KEY")
    embedding_base_url: str = Field("http://127.0.0.1:11434/v1", env="EMBEDDING_BASE_URL")
    embedding_model: str = Field("qwen3-embedding:8b", env="EMBEDDING_MODEL")


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