"""Google Books-Matching — Phase 5."""
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=10) as client:
        resp = await client.get(f"{GB_BASE}/volumes", params={"q": q, "maxResults": 5, "langRestrict": "de"})
        resp.raise_for_status()
        data = resp.json()

    results = []
    for item in data.get("items", []):
        vol = item.get("volumeInfo", {})
        authors = vol.get("authors", [])
        results.append(
            MatchResult(
                source="google_books",
                source_id=item.get("id", ""),
                title=vol.get("title", title),
                author=authors[0] if authors else None,
                description=vol.get("description"),
                publisher=vol.get("publisher"),
                publish_year=int(vol.get("publishedDate", "0")[:4]) if vol.get("publishedDate") else None,
                language=vol.get("language"),
                confidence=0.5,
            )
        )
    return results