import os

from deepdiff import DeepDiff

from functions import Functions, DaemonizeHAProxy, Certbot, Consts
from processor import ProcessorInterface


def start():
    processor_obj = ProcessorInterface.factory(os.getenv("EASYHAPROXY_DISCOVER"))
    if processor_obj is None:
        exit(1)

    os.makedirs(Consts.certs_certbot, exist_ok=True)
    os.makedirs(Consts.certs_haproxy, exist_ok=True)

    processor_obj.save_config(Consts.haproxy_config)
    processor_obj.save_certs(Consts.certs_haproxy)
    certbot_certs_found = processor_obj.get_certbot_hosts()
    Functions.log(Functions.EASYHAPROXY_LOG, Functions.DEBUG,
                  'Found hosts: %s' % ", ".join(processor_obj.get_hosts()))  # Needs to run after save_config
    Functions.log(Functions.EASYHAPROXY_LOG, Functions.TRACE, 'Object Found: %s' % (processor_obj.get_parsed_object()))

    old_haproxy = None
    haproxy = DaemonizeHAProxy()
    haproxy.haproxy("start")
    haproxy.sleep()

    certbot = Certbot(Consts.certs_certbot)

    while True:
        if old_haproxy is not None:
            old_haproxy.kill()
            old_haproxy = None
        try:
            old_parsed = processor_obj.get_parsed_object()
            processor_obj.refresh()
            if certbot.check_certificates(certbot_certs_found) or DeepDiff(old_parsed,
                                                                           processor_obj.get_parsed_object()) != {} or not haproxy.is_alive():
                Functions.log(Functions.EASYHAPROXY_LOG, Functions.DEBUG, 'New configuration found. Reloading...')
                Functions.log(Functions.EASYHAPROXY_LOG, Functions.TRACE,
                              'Object Found: %s' % (processor_obj.get_parsed_object()))
                processor_obj.save_config(Consts.haproxy_config)
                processor_obj.save_certs(Consts.certs_haproxy)
                certbot_certs_found = processor_obj.get_certbot_hosts()
                Functions.log(Functions.EASYHAPROXY_LOG, Functions.DEBUG,
                              'Found hosts: %s' % ", ".join(processor_obj.get_hosts()))  # Needs to after save_config
                old_haproxy = haproxy
                haproxy = DaemonizeHAProxy()
                haproxy.haproxy("reload")
                old_haproxy.terminate()

        except Exception as e:
            Functions.log(Functions.EASYHAPROXY_LOG, Functions.FATAL, "Err: %s" % e)

        Functions.log(Functions.EASYHAPROXY_LOG, Functions.DEBUG, 'Heartbeat')
        haproxy.sleep()


def main():
    Functions.run_bash(Functions.INIT_LOG, '/usr/sbin/haproxy -v')

    Functions.log(Functions.INIT_LOG, Functions.INFO, "                      _                               ")
    Functions.log(Functions.INIT_LOG, Functions.INFO, " ___ __ _ ____  _ ___| |_  __ _ _ __ _ _ _____ ___  _ ")
    Functions.log(Functions.INIT_LOG, Functions.INFO, "/ -_) _` (_-< || |___| ' \/ _` | '_ \ '_/ _ \ \ / || |")
    Functions.log(Functions.INIT_LOG, Functions.INFO, "\___\__,_/__/\_, |   |_||_\__,_| .__/_| \___/_\_\\_, |")
    Functions.log(Functions.INIT_LOG, Functions.INFO, "             |__/              |_|               |__/ ")

    Functions.log(Functions.INIT_LOG, Functions.INFO, "Release: %s" % (os.getenv("RELEASE_VERSION")))
    Functions.log(Functions.INIT_LOG, Functions.DEBUG, 'Environment:')
    for name, value in os.environ.items():
        if "HAPROXY" in name:
            Functions.log(Functions.INIT_LOG, Functions.DEBUG, "- {0}: {1}".format(name, value))

    start()


if __name__ == '__main__':
    main()