#!/usr/bin/env python

import os
import sys
import socket
from OpenSSL import crypto
from OpenSSL.crypto import PKey, X509

from server import app


VAR_PATH = "var"
LOG_PATH = os.path.join(VAR_PATH, "log")
KEY_PATH = os.path.join(VAR_PATH, "ssl-key.pem")
CERT_PATH = os.path.join(VAR_PATH, "ssl-cert.pem")


def generate_cert(serial=1):
    ca = X509()
    ca.set_version(2)
    ca.set_serial_number(serial)
    ca.get_subject().CN = socket.getfqdn()
    ca.gmtime_adj_notBefore(0)
    ca.gmtime_adj_notAfter(24 * 60 * 60)
    ca.set_issuer(ca.get_subject())
    ca.set_pubkey(key)
    ca.sign(key, "sha256")

    with open(CERT_PATH, "wb") as fp:
        fp.write(crypto.dump_certificate(crypto.FILETYPE_PEM, ca))


if not os.path.exists(VAR_PATH):
    os.mkdir(VAR_PATH)

if not os.path.exists(LOG_PATH):
    os.mkdir(LOG_PATH)

if not os.path.exists(KEY_PATH):
    key = PKey()
    key.generate_key(crypto.TYPE_RSA, 2048)

    with open(KEY_PATH, "wb") as fp:
        os.chmod(KEY_PATH, 0o600)
        fp.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, key))
else:
    with open(KEY_PATH, "rb") as fp:
        key = crypto.load_privatekey(crypto.FILETYPE_PEM, fp.read())


if not os.path.exists(CERT_PATH):
    generate_cert()
else:
    with open(CERT_PATH, "rb") as fp:
        cert = crypto.load_certificate(crypto.FILETYPE_PEM, fp.read())

    if cert.has_expired():
        generate_cert(cert.get_serial_number() + 1)


if __name__ == "__main__" and sys.argv[-1] == "runserver":
    app.run(host="0.0.0.0", port=5000,
            ssl_context=("var/ssl-cert.pem", "var/ssl-key.pem"),
            threaded=True, debug=True)