"""Provides the `post_HFR` function that posts messages to HFR.

You should get those ready:
    user (str):         username
    user_hash (str):    hashlib.md5(<plaintext_password>.encode()).hexdigest()
    posturl (str):      the post URL you are responding to (any post in the
            topic will do)
    newpost (str):      BBcode of the new post that's being posted

Beware of throttling/anti-flood limitations.
"""

import urllib.parse
import requests
from bs4 import BeautifulSoup

BASE = 'https://forum.hardware.fr'
POST = '/bddpost.php'


def post_HFR(user, user_hash, posturl, newpost):
    """Based on inputs, posts to HFR. Returns the resulting `requests` object.
    """
    # Cookie preparation. 3 Ss for md_passs, yes.
    cookie = {'md_passs': user_hash,
              'md_user': user}

    # Create HFR session
    HFR = requests.Session()
    HFR.cookies.update(cookie)

    # Retrieve page, we'll need the hash_check from it
    req = HFR.get(posturl)
    soup = BeautifulSoup(req.text, 'html.parser')

    # Parse post URL, we'll need to extract a bunch of values from it
    parsedURL = urllib.parse.parse_qs(posturl)

    # Prepare payload
    payload = {'hash_check': soup.find('input',
                                       {'name': 'hash_check'})['value'],
               'post': parsedURL['post'][0],
               'cat': parsedURL['cat'][0],
               'verifrequet': 1100,
               'sujet': soup.find('input', {'name': 'sujet'})['value'],
               'content_form': newpost,
               'pseudo': user,
               'signature': 1}

    # Post payload
    post_req = HFR.post(BASE+POST, data=payload)

    return post_req