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",
        extra="ignore",
    )

    app_name: str = "hufs-notice-crawler"
    app_env: str = "development"
    database_url: str = Field(
        default="postgresql+psycopg://postgres:postgres@localhost:5432/hufs_notice_crawler"
    )
    base_url: str = "https://computer.hufs.ac.kr"
    request_timeout_seconds: float = 15.0
    max_pages_per_board: int = 5
    user_agent: str = (
        "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 "
        "(KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
    )


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