import logging
import netifaces
from twisted.internet import defer
from txupnp.ssdp import SSDPFactory
from txupnp.scpd import SCPDCommandRunner
from txupnp.gateway import Gateway
from txupnp.fault import UPnPError
from txupnp.constants import UPNP_ORG_IGD

log = logging.getLogger(__name__)


class SOAPServiceManager(object):
    def __init__(self, reactor, treq_get=None):
        self._reactor = reactor
        self.router_ip, self.iface_name = netifaces.gateways()['default'][netifaces.AF_INET]
        self.lan_address = netifaces.ifaddresses(self.iface_name)[netifaces.AF_INET][0]['addr']
        self.sspd_factory = SSDPFactory(self._reactor, self.lan_address, self.router_ip)
        self._command_runners = {}
        self._selected_runner = UPNP_ORG_IGD
        self._treq_get = treq_get

    @defer.inlineCallbacks
    def discover_services(self, address=None, timeout=30, max_devices=1):
        server_infos = yield self.sspd_factory.m_search(
            address or self.router_ip, timeout=timeout, max_devices=max_devices
        )
        locations = []
        for server_info in server_infos:
            if 'st' in server_info and server_info['st'] not in self._command_runners:
                locations.append(server_info['location'])
                gateway = Gateway(**server_info)
                yield gateway.discover_services()
                command_runner = SCPDCommandRunner(gateway, self._reactor, self._treq_get)
                yield command_runner.discover_commands()
                self._command_runners[gateway.urn.decode()] = command_runner
            elif 'st' not in server_info:
                log.error("don't know how to handle gateway: %s", server_info)
                continue
        defer.returnValue(len(self._command_runners) > 0)

    def set_runner(self, urn):
        if urn not in self._command_runners:
            raise IndexError(urn)
        self._command_runners = urn

    def get_runner(self):
        if self._command_runners and not self._selected_runner in self._command_runners:
            self._selected_runner = list(self._command_runners.keys())[0]
        if not self._command_runners:
            raise UPnPError("no devices found")
        return self._command_runners[self._selected_runner]

    def get_available_runners(self):
        return self._command_runners.keys()

    def debug(self, include_gateway_xml=False):
        results = []
        for runner in self._command_runners.values():
            gateway = runner._gateway
            info = gateway.debug_device(include_xml=include_gateway_xml)
            commands = runner.debug_commands()
            service_result = []
            for service in info['services']:
                service_commands = []
                unavailable = []
                for command, service_type in commands['available'].items():
                    if service['serviceType'] == service_type:
                        service_commands.append(command)
                for command, service_type in commands['failed'].items():
                    if service['serviceType'] == service_type:
                        unavailable.append(command)
                services_with_commands = dict(service)
                services_with_commands['available_commands'] = service_commands
                services_with_commands['unavailable_commands'] = unavailable
                service_result.append(services_with_commands)
            info['services'] = service_result
            results.append(info)
        return results