import json
import requests
from django.db.models import Q
from django_filters.rest_framework import DjangoFilterBackend
from rest_framework import filters
from rest_framework import viewsets
from django.views.decorators.csrf import csrf_exempt
from dspt_api.models import EcChannel, EcEnv, EcApi, EcApiParams, EcCinemaIds, EcRequestLog, EcApiGroup
from dspt_api.serializers import EcChannelSerializer, EcEnvSerializer, EcApiSerializer, EcApiParamsSerializer, \
    EcCinemaIdsSerializer, EcRequestLogSerializer, EcApiGroupSerializer

from util.sign import Sign


# Create your views here.
class EcChannelViewSet(viewsets.ModelViewSet):
    queryset = EcChannel.objects.all()
    serializer_class = EcChannelSerializer


class EcEnvViewSet(viewsets.ModelViewSet):
    queryset = EcEnv.objects.all()
    serializer_class = EcEnvSerializer


class EcApiViewSet(viewsets.ModelViewSet):
    queryset = EcApi.objects.all()
    serializer_class = EcApiSerializer


class EcApiParamsViewSet(viewsets.ModelViewSet):
    queryset = EcApiParams.objects.all()
    serializer_class = EcApiParamsSerializer
    filter_backends = (filters.SearchFilter, DjangoFilterBackend)
    # http://172.16.1.114:8000/ec/get_api_params?api_id=1
    filterset_fields = ('api_id',)


class EcCinemaIdsViewSet(viewsets.ModelViewSet):
    queryset = EcCinemaIds
    serializer_class = EcCinemaIdsSerializer


class EcRequestLogViewSet(viewsets.ModelViewSet):
    queryset = EcRequestLog.objects.all()
    serializer_class = EcRequestLogSerializer


class EcApiGroupViewSet(viewsets.ModelViewSet):
    queryset = EcApiGroup.objects.all()
    serializer_class = EcApiGroupSerializer


@csrf_exempt
def general_api_url(request):
    req_obj = handle_request(request)
    return req_obj.url


def handle_request(_request):
    """
        POST请求参数
        env dspt或zyds
        member_type member或nonmember
        api api地址
        params 请求参数
        """
    req = _request.POST
    env = req.get('env')
    member_type = req.get('member_type')
    base_url = EcEnv.objects.filter(Q(code=env) & Q(type=member_type)).first().get('host')
    api = req.get('api')
    params = json.loads(req.get('params'))
    pid = params.get('pid')
    key = EcChannel.objects.filter(Q(pid=pid) & Q(env=env)).first().get('channel_key')
    sign = Sign(key)
    req_params = sign.add_sig(params)
    req_obj = prepare_request(base_url, api, req_params)
    return req_obj


def prepare_request(_url, _api, _params):
    req = requests.PreparedRequest()
    req.prepare_method('GET')
    req.prepare_url(url=_url + '/' + _api, params=_params)
    req.prepare_headers({'host': _url[7:]})
    return req


@csrf_exempt
def send_request(request):
    req = handle_request(request)
    response = requests.Session().send(req)
    # 插入数据

    return response.json()