import os
import sys
import time

import syncthing_monitor.config_xml as xml
from .etcd_client import EtcdClient
from .syncthing_client import SyncthingClient

SYNCTHING_CONFIG_XML_PATH = '/config/config.xml'
SYNCTHING_GUI_PORT = 8384
ETCD_PORT = 2379


def main():
    program = Program(os.getenv('SYNCTHING_PUBLIC_HOST'),
                      SYNCTHING_CONFIG_XML_PATH, "sync", SYNCTHING_GUI_PORT,
                      "etcd", ETCD_PORT)
    program.start()


class Program:
    def __init__(self, syncthing_public_host,
                 syncthing_config_xml_path, syncthing_hostname, syncthing_gui_port,
                 etcd_hostname, etcd_port):
        self.syncthing_public_host = syncthing_public_host
        self.my_device_id = None
        self.syncthing = None
        self.etcd = EtcdClient(etcd_hostname, etcd_port)
        self.syncthing_gui_port = syncthing_gui_port
        self.syncthing_hostname = syncthing_hostname
        self.syncthing_config_xml_path = syncthing_config_xml_path

    def initialize_syncthing(self):
        api_key = xml.parse_api_key(self.syncthing_config_xml_path)
        print("Found API Key: {0}".format(api_key))

        print("Configuring Syncthing to listen on 0.0.0.0...")
        xml.set_listen_ip_to_any(self.syncthing_config_xml_path,
                                 self.syncthing_config_xml_path,
                                 self.syncthing_gui_port)

        self.syncthing = SyncthingClient(api_key, self.syncthing_hostname, self.syncthing_gui_port)

    def start(self):
        self.initialize_syncthing()

        self.my_device_id = self.syncthing.get_my_device_id()
        print("Found My Device ID: {0}".format(self.my_device_id))

        self.etcd.register_device_update_handler(self.update_devices)
        self.etcd.add_device_to_cluster(self.my_device_id, self.syncthing_public_host)

        self.loop()

    @staticmethod
    def loop():
        while True:
            sys.stdout.flush()
            time.sleep(1)

    # noinspection PyUnusedLocal
    def update_devices(self, event):
        device_list = self.etcd.get_device_list()
        self.syncthing.add_devices(device_list)
        self.syncthing.print_config()


if __name__ == "__main__":
    main()