# ~*~ coding: utf-8 ~*~
from django.shortcuts import get_object_or_404
from rest_framework.response import Response
from rest_framework.exceptions import ValidationError

from common.utils import get_logger
from common.permissions import IsOrgAdmin, IsOrgAdminOrAppUser, IsValidUser
from orgs.mixins.api import OrgBulkModelViewSet
from orgs.mixins import generics
from ..models import SystemUser, Asset
from .. import serializers
from ..serializers import SystemUserWithAuthInfoSerializer, SystemUserTempAuthSerializer
from ..tasks import (
    push_system_user_to_assets_manual, test_system_user_connectivity_manual,
    push_system_user_to_assets
)


logger = get_logger(__file__)
__all__ = [
    'SystemUserViewSet', 'SystemUserAuthInfoApi', 'SystemUserAssetAuthInfoApi',
    'SystemUserCommandFilterRuleListApi', 'SystemUserTaskApi', 'SystemUserAssetsListView',
    'SystemUserTempAuthInfoApi', 'SystemUserAppAuthInfoApi',
]


class SystemUserViewSet(OrgBulkModelViewSet):
    """
    System user api set, for add,delete,update,list,retrieve resource
    """
    model = SystemUser
    filterset_fields = {
        'name': ['exact'],
        'username': ['exact'],
        'protocol': ['exact', 'in']
    }
    search_fields = filterset_fields
    serializer_class = serializers.SystemUserSerializer
    serializer_classes = {
        'default': serializers.SystemUserSerializer,
        'list': serializers.SystemUserListSerializer,
    }
    permission_classes = (IsOrgAdminOrAppUser,)


class SystemUserAuthInfoApi(generics.RetrieveUpdateDestroyAPIView):
    """
    Get system user auth info
    """
    model = SystemUser
    permission_classes = (IsOrgAdminOrAppUser,)
    serializer_class = SystemUserWithAuthInfoSerializer

    def destroy(self, request, *args, **kwargs):
        instance = self.get_object()
        instance.clear_auth()
        return Response(status=204)


class SystemUserTempAuthInfoApi(generics.CreateAPIView):
    model = SystemUser
    permission_classes = (IsValidUser,)
    serializer_class = SystemUserTempAuthSerializer

    def create(self, request, *args, **kwargs):
        serializer = super().get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        pk = kwargs.get('pk')
        instance = get_object_or_404(SystemUser, pk=pk)
        data = serializer.validated_data
        user = self.request.user
        instance_id = data.get('instance_id')
        instance.set_temp_auth(instance_id, user, data)
        return Response(serializer.data, status=201)


class SystemUserAssetAuthInfoApi(generics.RetrieveAPIView):
    """
    Get system user with asset auth info
    """
    model = SystemUser
    permission_classes = (IsOrgAdminOrAppUser,)
    serializer_class = SystemUserWithAuthInfoSerializer

    def get_object(self):
        instance = super().get_object()
        asset_id = self.kwargs.get('asset_id')
        user_id = self.request.query_params.get("user_id")
        username = self.request.query_params.get("username")
        instance.load_asset_more_auth(asset_id=asset_id, user_id=user_id, username=username)
        return instance


class SystemUserAppAuthInfoApi(generics.RetrieveAPIView):
    """
    Get system user with asset auth info
    """
    model = SystemUser
    permission_classes = (IsOrgAdminOrAppUser,)
    serializer_class = SystemUserWithAuthInfoSerializer

    def get_object(self):
        instance = super().get_object()
        app_id = self.kwargs.get('app_id')
        user_id = self.request.query_params.get("user_id")
        if user_id:
            instance.load_app_more_auth(app_id, user_id)
        return instance


class SystemUserTaskApi(generics.CreateAPIView):
    permission_classes = (IsOrgAdmin,)
    serializer_class = serializers.SystemUserTaskSerializer

    def do_push(self, system_user, asset_ids=None):
        if asset_ids is None:
            task = push_system_user_to_assets_manual.delay(system_user)
        else:
            username = self.request.query_params.get('username')
            task = push_system_user_to_assets.delay(
                system_user.id, asset_ids, username=username
            )
        return task

    @staticmethod
    def do_test(system_user, asset_ids):
        task = test_system_user_connectivity_manual.delay(system_user, asset_ids)
        return task

    def get_object(self):
        pk = self.kwargs.get('pk')
        return get_object_or_404(SystemUser, pk=pk)

    def perform_create(self, serializer):
        action = serializer.validated_data["action"]
        asset = serializer.validated_data.get('asset')

        if asset:
            assets = [asset]
        else:
            assets = serializer.validated_data.get('assets') or []

        asset_ids = [asset.id for asset in assets]
        asset_ids = asset_ids if asset_ids else None

        system_user = self.get_object()
        if action == 'push':
            task = self.do_push(system_user, asset_ids)
        else:
            task = self.do_test(system_user, asset_ids)
        data = getattr(serializer, '_data', {})
        data["task"] = task.id
        setattr(serializer, '_data', data)


class SystemUserCommandFilterRuleListApi(generics.ListAPIView):
    permission_classes = (IsOrgAdminOrAppUser,)

    def get_serializer_class(self):
        from ..serializers import CommandFilterRuleSerializer
        return CommandFilterRuleSerializer

    def get_queryset(self):
        pk = self.kwargs.get('pk', None)
        system_user = get_object_or_404(SystemUser, pk=pk)
        return system_user.cmd_filter_rules


class SystemUserAssetsListView(generics.ListAPIView):
    permission_classes = (IsOrgAdmin,)
    serializer_class = serializers.AssetSimpleSerializer
    filterset_fields = ("hostname", "ip")
    search_fields = filterset_fields

    def get_object(self):
        pk = self.kwargs.get('pk')
        return get_object_or_404(SystemUser, pk=pk)

    def get_queryset(self):
        system_user = self.get_object()
        return system_user.get_all_assets()