from django.contrib.auth import authenticate, login, logout
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_exempt
from django.shortcuts import render_to_response
from django.views.generic import View
from django.http.response import HttpResponse, HttpResponseRedirect
from django.template import RequestContext
from django.contrib.auth.models import User

from posts.views import JsonResponseMixin, DataError
from .forms import RegistrationForm


# Create your views here.


class LoginView(JsonResponseMixin, View):
    def get_context_data(self, request, *args, **kwargs):
        try:
            data = json.loads(request.body.decode('utf-8'))
            username = data['login']
            password = data['password']
        except KeyError:
            raise DataError

        user = authenticate(username=username, password=password)
        if user is not None and user.is_active:
            login(request, user)
            return [{'login': username}]
        else:
            raise DataError

    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return super(LoginView, self).dispatch(request, *args, **kwargs)


class CheckLoginView(JsonResponseMixin, View):
    def get_context_data(self, request, *args, **kwargs):
        if request.user.is_authenticated():
            return {'isLogined': True, 'username': request.user.username}
        else:
            return {'isLogined': False}

    @method_decorator(csrf_exempt)
    def dispatch(self, request, *args, **kwargs):
        return super(CheckLoginView, self).dispatch(request, *args, **kwargs)


class LogoutView(View):
    def get(self, request, *args, **kwargs):
        if request.user.is_authenticated():
            logout(request)
        return HttpResponse()


class RegisterView(View):
    def get(self, request, *args, **kwargs):
        form = RegistrationForm()
        context = RequestContext(request, {'form': form})
        return render_to_response("registration.html", context,)

    def post(self, request, *args, **kwargs):
        print(request.body)
        form = RegistrationForm(request.POST)
        print(form)
        if form.is_valid():
            user = User.objects.create_user(
                username=form.cleaned_data['username'],
                password=form.cleaned_data['password1'],
                email=form.cleaned_data['email']
            )
            user = authenticate(username=form.cleaned_data['username'], password=form.cleaned_data['password1'])
            login(request, user)
        return HttpResponseRedirect('/')