import requests
import queue
import re
import logging as log

# Init logging
log.basicConfig(level=log.INFO, format="%(asctime)-15s %(levelname)-8s %(message)s")
log.info("Shammer is getting ready...")

# Init static vars
INDEX_URL = "https://bitscuit.be/"
MAX_CONTENT_LENGTH = 500000

# Create session
session = requests.Session()

# Create website queue
urls = queue.Queue()
urls.put(INDEX_URL)

# Create list to store visited sites
visited = set([INDEX_URL])

# Loop
while not urls.empty():
    url = urls.get()

    # Perform request
    log.info("Fetching '%s'..."%url)
    try:
        r = session.get(url, stream=True)
        
        # Check file size
        if ("Content-Length" in r.headers.keys() and int(r.headers["Content-Length"]) > MAX_CONTENT_LENGTH) or ("content-length" in r.headers.keys() and int(r.headers["content-length"]) > MAX_CONTENT_LENGTH):
            log.info("too large response")
            continue

        # Download full
        r = session.get(url)

    except Exception as e:
        log.info("failed")
        log.info(e)
    finally:
        r.close()

    # Read response
    if r.status_code != 200:
        log.info("returned status %d"%r.status_code)
        continue

    # Filter page for hrefs
    hrefs = []
    try:
        hrefs = [res[0] for res in re.findall("(https*:\/\/([a-z0-9]+\.)*[a-z0-9]{3,}\.[a-z0-9]{2,}\/)", r.text)]
        pages = [(url[:url.rfind("/")+1]+res[0][(1 if res[0][0] == "/" else 0):]) for res in re.findall("href *= *[\"'](\/*([a-z0-9]*\/*)+(\.[a-z0-9]*)*)[\"']", r.text)]
        hrefs.extend(pages)
        print(hrefs)
    except Exception as e:
        log.info("failed to parse page")
        log.info(e)

    # Add to queue
    numAdded = 0
    for href in hrefs:
        if href not in visited:
            urls.put(href)
            visited.add(href)
            numAdded += 1
    log.info("%d urls, %d new, queue length %d"%(len(hrefs), numAdded, urls.qsize()))