import httpx
from .base import MatchResult

GB_BASE = "https://www.googleapis.com/books/v1"


async def search_google_books(title: str, author: str | None = None) -> list[MatchResult]:
    q = f'intitle:"{title}"'
    if author:
        q += f' inauthor:"{author}"'

    async with httpx.AsyncClient(timeout=12) as client:
        try:
            r = await client.get(
                f"{GB_BASE}/volumes",
                params={"q": q, "maxResults": 5, "langRestrict": "de", "printType": "books"},
            )
            r.raise_for_status()
            data = r.json()
        except Exception:
            return []

    results = []
    for item in data.get("items", []):
        vol = item.get("volumeInfo", {})
        authors = vol.get("authors", [])

        cover_url = None
        image_links = vol.get("imageLinks", {})
        if image_links:
            cover_url = (
                image_links.get("extraLarge")
                or image_links.get("large")
                or image_links.get("medium")
                or image_links.get("thumbnail", "").replace("zoom=1", "zoom=3")
            )

        year = None
        pub_date = vol.get("publishedDate", "")
        if pub_date and len(pub_date) >= 4:
            try:
                year = int(pub_date[:4])
            except ValueError:
                pass

        results.append(MatchResult(
            source="google_books",
            source_id=item.get("id", ""),
            title=vol.get("title", title),
            subtitle=vol.get("subtitle"),
            author=authors[0] if authors else None,
            description=vol.get("description"),
            publisher=vol.get("publisher"),
            publish_year=year,
            language=vol.get("language"),
            genres=vol.get("categories", []),
            cover_url=cover_url,
            confidence=0.5,
        ))
    return results