from functools import lru_cache
from pathlib import Path

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", extra="ignore")

    database_url: str = "sqlite:///./wisegrade.db"
    redis_url: str = "redis://localhost:6379/0"
    inbox_path: Path = Path("/data/inbox")
    processed_path: Path = Path("/data/processed")
    exports_path: Path = Path("/data/exports")
    deepseek_base_url: str = "https://api.deepseek.com"
    deepseek_model: str = "deepseek-flash"
    deepseek_api_key: str = ""
    wisegrade_secret_key: str = ""
    embedding_model_name: str = "BAAI/bge-m3"
    embedding_model_path: Path = Path("/models/bge-m3")
    embedding_model_version: str = "local"
    ocr_model_dir: Path = Path("/models/ocr")
    model_timeout_seconds: int = 120
    model_concurrency: int = 2
    model_retries: int = 2
    chat_max_tool_calls: int = Field(default=32, ge=1, le=64)


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