#!/usr/bin/python3
# vim:syntax=python

import json
import base64
from urllib.request import urlopen
from urllib.request import Request


def get_file_content(checkfile=None):
    try:
        with open(checkfile, "r") as f:
            ret = f.read()
    except OSError:
        return None

    return ret


def write_file_content(content=None,
                       filename=None):
    try:
        with open(filename, "w") as f:
            ret = f.write(content)
    except OSError:
        return None

    return ret


def get_pki_cert(url="http://pki",
                 username=None,
                 password=None,
                 domains=None):
    req = Request(method="POST",
                  url=f"{url}/cert",
                  headers={"Content-Type":"application/json"})
    authstring = base64.b64encode(f"{username}:{password}".encode()).decode()
    req.add_header("Authorization", f"Basic {authstring}")
    jsondata = json.dumps(domains)
    res = urlopen(req, jsondata.encode('utf-8'))
    resj = json.loads(res.read())

    return resj["certificate"], resj["privatekey"]