"""
id: pdf
title: PDF Finder & Downloader
author: admin
description: Find PDF links on a page and download to /data/adaptai/web/pdf.
version: 0.1.0
license: Proprietary
"""

import re
import os
import urllib.request
import urllib.parse
import hashlib

PDF_DIR = "/data/adaptai/web/pdf"
os.makedirs(PDF_DIR, exist_ok=True)


class Tools:
    def find_and_download(self, url: str, max_pdfs: int = 5) -> dict:
        html = (
            urllib.request.urlopen(url, timeout=20)
            .read()
            .decode("utf-8", errors="replace")
        )
        base = url
        links = []
        for href in re.findall(r'href="([^"]+\.pdf)"', html, flags=re.I):
            full = urllib.parse.urljoin(base, href)
            links.append(full)
            if len(links) >= max_pdfs:
                break
        saved = []
        for link in links:
            try:
                data = urllib.request.urlopen(link, timeout=30).read()
                h = hashlib.sha1(link.encode()).hexdigest()[:12]
                path = f"{PDF_DIR}/{h}.pdf"
                open(path, "wb").write(data)
                saved.append({"url": link, "file": path})
            except Exception:
                continue
        return {"found": len(links), "saved": saved}