import httpx
import datetime
import os
from pathlib import Path
from logger import get_worker_thread_logger
from urllib.parse import urlparse

def get_datestring() -> str:
    return datetime.datetime.now().strftime("%d.%m.%y")


def cache_cheatsheet(url, outdir: str) -> str | None:
    logger = get_worker_thread_logger()
    logger.info(f"Caching cheatsheet from {url}")

    try:
        with httpx.Client() as client:
            r = client.get(url, timeout=5.0)
            if not r.is_success and r.headers.get("Content-Type") != "application/pdf":
                logger.error(f"Failed to fetch URL: {url} (status code: {r.status_code})")
                return None 
    except httpx.TimeoutException:
        logger.error(f"Timeout fetching URL: {url}")
        return None

    data = r.content

    url_base_name = Path(urlparse(url).path).stem

    filesname = os.path.join("cache", f"{url_base_name}.pdf")
    
    if not os.path.exists(os.path.join(outdir, "cache")):
        os.mkdir(os.path.join(outdir, "cache"))

    with open(os.path.join(outdir, filesname), "wb") as f:
        f.write(data)

    logger.info(f"Saved file to {filesname}")
    
    return filesname