import csv
import logging

from django.shortcuts import render
from django.http import HttpResponse
from django.contrib.auth import get_user_model

from rest_framework import status
from rest_framework import viewsets
from rest_framework.response import Response
from rest_framework.permissions import IsAdminUser
from rest_framework.generics import UpdateAPIView
from rest_framework.decorators import api_view, permission_classes

from . import models
from . import serializers

from back_latienda.permissions import CustomUserPermissions, YourOwnUserPermissions


User = get_user_model()

# Create your views here.

logging.basicConfig(
    filename='logs/csv-load.log',
    filemode='w',
    format='%(levelname)s:%(message)s',
    level=logging.INFO,
    )


class CustomUserViewSet(viewsets.ModelViewSet):

    model = models.CustomUser
    # serializer_class = serializers.CustomUserSerializer
    serializer_class = serializers.CustomUserReadSerializer
    write_serializer_class =serializers.CustomUserWriteSerializer
    model_name = 'custom_user'
    queryset = models.CustomUser.objects.all()
    permission_classes = [CustomUserPermissions,]

    def create(self, request):
        """
        Create Instance
        """
        try:
            serializer = self.write_serializer_class(
                data=request.data,
            )
            if serializer.is_valid():
                # save model instance data
                password = serializer.validated_data.pop('password')
                instance = self.model(**serializer.validated_data)
                instance.set_password(password)
                instance.save()

                return Response(self.serializer_class(
                    instance, many=False, context={'request': request}).data,
                                status=status.HTTP_201_CREATED)
            else:
                return Response(
                    serializer.errors, status=status.HTTP_406_NOT_ACCEPTABLE)
        except Exception as e:
            return Response(str(e), status=status.HTTP_500_INTERNAL_SERVER_ERROR)


class ChangeUserPasswordView(UpdateAPIView):

    model = models.CustomUser
    queryset = model.objects.all()
    permission_classes = (YourOwnUserPermissions,)
    serializer_class = serializers.ChangePasswordSerializer


class UpdateUserView(UpdateAPIView):

    model = models.CustomUser
    queryset = model.objects.all()
    permission_classes = (YourOwnUserPermissions,)
    serializer_class = serializers.UpdateUserSerializer


@api_view(['POST',])
@permission_classes([IsAdminUser,])
def load_coop_managers(request):
    """Read CSV file being received
    Parse it to create users and related companies
    """
    csv_file = request.FILES["csv_file"]
    if csv_file.name.endswith('.csv') is not True:
        logging.error(f"File {csv_file.name} is not a CSV file")
        return Response({"errors":{"details": "File is not CSV type"}})

    logging.info(f"Reading contents of  {csv_file.name}")
    csv_reader =  csv.DictReader(csv_file, delimiter=',')
    for row in csv_reader:
        email = row['email']
        cif = row['cif']
        company_name = row['nombre-coop']
        short_name = row['nombre-corto']
        url = row['url']
        shop = row['es-tienda']

        coop = None
        coop_user = User.objects.create_user(email=email, company=coop, role='COOP_MANAGER')


    return Response