"""Handle dispatcher API requests."""

from __future__ import unicode_literals

import copy
import logging
import os
import xmlrpclib

from django.conf import settings
from django.http import Http404
from django.shortcuts import get_object_or_404
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import generics, status

from dispatch.models import Dispatcher
from dispatch.serializers import DispatchMessageSerializer, DispatcherSerializer


log = logging.getLogger('dispatch.views')


class DispatcherList(generics.ListAPIView):

    """List all dispatchers."""

    queryset = Dispatcher.objects.all()
    serializer_class = DispatcherSerializer


class DispatcherDetail(generics.RetrieveAPIView):

    """Detail the given dispatcher."""

    queryset = Dispatcher.objects.all()
    serializer_class = DispatcherSerializer


class DispatchMessage(generics.GenericAPIView):

    """Send a message to the given dispatcher."""

    queryset = Dispatcher.objects.all()
    serializer_class = DispatchMessageSerializer

    def get_object(self):
        queryset = self.get_queryset()
        queryset = self.filter_queryset(queryset)
        return get_object_or_404(queryset)

    def get(self, request, *args, **kwargs):
        dispatcher = self.get_object()
        data = {'status': "READY"}
        message = self.serializer_class(data=data)
        return Response(message.initial_data)

    def post(self, request, *args, **kwargs):
        dispatcher = self.get_object()
        message = self.serializer_class(data=request.data)
        if message.is_valid():
            if dispatcher.type == Dispatcher.PRIVMSG_TYPE:
                bot_url = 'http://{0:s}:{1:d}/'.format(settings.IRCBOT_XMLRPC_HOST, settings.IRCBOT_XMLRPC_PORT)
                bot = xmlrpclib.ServerProxy(bot_url)
                log.debug("sending '%s' to channel %s", message.data['message'], dispatcher.destination)
                bot.privmsg(dispatcher.destination, message.data['message'])
            elif dispatcher.type == Dispatcher.FILE_TYPE:
                filename = os.path.abspath(dispatcher.destination)
                log.debug("sending '%s' to file %s", message.data['message'], filename)
                with open(filename, 'w') as f:
                    f.write(message.data['message'])
                    f.write('\n')

            new_data = copy.deepcopy(message.data)
            new_data['status'] = "OK"
            new_message = self.serializer_class(data=new_data)
            return Response(new_message.initial_data)

        return Response(message.errors, status=status.HTTP_400_BAD_REQUEST)