from django.http import HttpResponse
from django.contrib.auth.decorators import login_required
from django.contrib.auth import authenticate, login, logout
from django.shortcuts import render, redirect
from django.views.decorators.csrf import csrf_exempt
from django.contrib.auth.models import User
from django.db import transaction

@login_required()
def index(request):
    return render(request, 'index.html')

def login_view(request):
    if request.method == 'GET':
        return render(request, 'login.html')
    elif request.method == 'POST':
        username = request.POST.get('username')
        password = request.POST.get('password')

        user = authenticate(username=username, password=password)

        if user is not None:
            login(request, user)
            return redirect("index")
        else:
            return render(request, 'login.html', { 'login_failed' : True })
    return redirect("index")

def logout_view(request):
    if request.method == 'POST':
        logout(request)
    return redirect("index")