import aiohttp
import certifi
import os
import ssl
from typing import Dict, Any

SERPER_API_KEY = str.strip(os.getenv("SERPER_API_KEY", ""))
AIOHTTP_TIMEOUT = int(os.getenv("AIOHTTP_TIMEOUT", "15"))

if not SERPER_API_KEY:
    raise ValueError("SERPER_API_KEY environment variable is not set.")


async def google(q: str, results: int = 5) -> Dict[str, Any]:
    url = "https://google.serper.dev/search"
    return await fetch_json(url, {
        "q": q,
        "num": results,
        "page": 1,
    })


async def fetch_json(url: str, payload: dict) -> Dict[str, Any]:
    headers = {
        'X-API-KEY': SERPER_API_KEY,
        'Content-Type': 'application/json'
    }

    ssl_context = ssl.create_default_context(cafile=certifi.where())
    connector = aiohttp.TCPConnector(ssl=ssl_context)

    timeout = aiohttp.ClientTimeout(total=AIOHTTP_TIMEOUT)
    async with aiohttp.ClientSession(connector=connector, timeout=timeout) as session:
        async with session.post(url, headers=headers, json=payload) as response:
            response.raise_for_status()
            return await response.json()