from __future__ import annotations

from typing import List

# Prefer the new ddgs package, fall back to duckduckgo_search if needed
try:
    from ddgs import DDGS  # new package name
except ImportError:
    from duckduckgo_search import DDGS  # old package name

from ..state import ResearchSnippet
from ..config import settings


def web_search(query: str, max_results: int | None = None) -> List[ResearchSnippet]:
    """
    Perform a web search and return normalized snippets.
    Uses DuckDuckGo via ddgs (preferred) or duckduckgo_search.
    """
    limit = max_results or settings.max_search_results
    snippets: List[ResearchSnippet] = []

    # region/safesearch can matter for results; 'wt-wt' = worldwide, 'off' = no filtering
    with DDGS() as ddgs:
        for result in ddgs.text(
            query,
            max_results=limit,
        ):
            title = result.get("title") or ""
            url = result.get("href") or result.get("url") or ""
            snippet = result.get("body") or result.get("snippet") or ""
            if not snippet.strip():
                continue
            snippets.append(
                {
                    "title": title.strip(),
                    "url": url.strip(),
                    "snippet": snippet.strip(),
                }
            )
    return snippets