from django.shortcuts import render

# Create your views here.

from django.contrib.auth import authenticate
from rest_framework import status
from rest_framework.response import Response
from rest_framework.permissions import AllowAny
from rest_framework.authtoken.models import Token
from rest_framework.decorators import api_view, permission_classes
from django.views.decorators.csrf import csrf_exempt

from datetime import datetime


@csrf_exempt
@api_view(["GET"])
def sample_login(request):
    data = {'sample_data': 123}
    return Response(data, status=status.HTTP_200_OK)


@csrf_exempt
@api_view(["POST"])
@permission_classes((AllowAny,))
def login(request):
    username = request.data.get("username")
    password = request.data.get("password")
    if username is None or password is None:
        return Response({'error': 'Please provide both username and password'}, status=status.HTTP_400_BAD_REQUEST)
    user = authenticate(username=username, password=password)
    if not user:
        return Response({'error': 'Invalid Credentials'}, status=status.HTTP_404_NOT_FOUND)
    token, _ = Token.objects.get_or_create(user=user)

    # token will need to be stored on the client side in the session, or in local storage and send the token in the
    # header as authorization with every API call
    return Response({'token': token.key}, status=status.HTTP_200_OK)

# the following code shows how to store the token in the header for a request call
# url = 'http://127.0.0.1:8000/hello/'
# headers = {'Authorization': 'Token 9054f7aa9305e012b3c2300408c3dfdf390fcddf'}
# r = requests.get(url, headers=headers)

# check that server is working
@api_view(['GET'])
def index(request):
    date = datetime.now().strftime("%d/%m/%Y %H:%M:%S")
    message = "server is live, current time is:"
    return Response(data=message + date, status=status.HTTP_200_OK)

# from django.contrib.auth import authenticate
# user = authenticate(username='john', password='secret')
# if user is not None:
#     # A backend authenticated the credentials
# else:
#     # No backend authenticated the credentials