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")

    nextcloud_webdav_url: str
    nextcloud_user: str
    nextcloud_app_password: str

    ollama_url: str
    ollama_embed_model: str

    qdrant_url: str
    qdrant_collection: str

    webhook_secret: str

    ingest_root: str = "Documents/THB/Studium"
    chunk_size_words: int = 500
    chunk_overlap_words: int = 50
    log_level: str = "INFO"

    # MCP server (app.mcp_server). Optional so the ingestor — which shares
    # this Settings model — is unaffected. The MCP server itself refuses to
    # start when rag_mcp_token is empty.
    rag_mcp_token: str = ""
    rag_mcp_port: int = 9009


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