from django.contrib.auth import get_user_model, logout, login, views
from django.contrib.auth.forms import AuthenticationForm
from django.http import JsonResponse
from django.views.generic import FormView, View
from django.views.generic.edit import BaseFormView
from django.urls import reverse_lazy

from .forms import LearnerRegistrationForm
from .tokens import verification_email_token
from apps.notification.utils import send_email

User = get_user_model()


class LearnerRegistrationView(FormView):
    form_class = LearnerRegistrationForm
    template_name = "auth/registration-learner.html"

    def form_valid(self, form):
        first_name = form.cleaned_data['first_name']
        last_name = form.cleaned_data['last_name']
        email = form.cleaned_data['email']
        password = form.cleaned_data['password']

        user = User.objects.create_user(username=email, email=email, first_name=first_name, last_name=last_name, password=password)
        login(self.request, user)

        # fixme: change email text
        # fixme: async send email
        token = verification_email_token.make_token(user)
        send_email('Verification Email', email, "notification/email/verification_email.html", token=token)

        return JsonResponse({"success": True}, status=201)

    def form_invalid(self, form):
        return JsonResponse(form.errors.get_json_data(escape_html=True), status=400)


class LogoutView(View):
    def post(self, request, *args, **kwargs):
        logout(request)
        return JsonResponse({"success": True})


class LoginView(FormView):
    form_class = AuthenticationForm
    template_name = "auth/login.html"

    def form_valid(self, form):
        login(self.request, form.get_user())
        return JsonResponse({"success": True})

    def form_invalid(self, form):
        return JsonResponse({"success": False, "errors": form.errors.get_json_data(escape_html=True)}, status=400)


class VerificationEmailView(View):
    def get(self, request, *args, **kwargs):
        is_valid_token = verification_email_token.check_token(request.user, kwargs.get('token'))

        if is_valid_token:
            lilcity_user_settings = request.user.lilcity_user_settings
            lilcity_user_settings.is_verification_email = True
            lilcity_user_settings.save()
            return JsonResponse({"success": True})
        else:
            return JsonResponse({"success": False}, status=400)


class PasswordResetView(views.PasswordContextMixin, BaseFormView):
    email_template_name = "auth/password_reset.html"
    subject_template_name = "auth/password_reset_subject.txt"
    form_class = views.PasswordResetForm

    extra_email_context = None
    from_email = None
    html_email_template_name = None
    title = 'Password reset'
    token_generator = views.default_token_generator

    def form_valid(self, form):
        opts = {
            'use_https': self.request.is_secure(),
            'token_generator': self.token_generator,
            'from_email': self.from_email,
            'email_template_name': self.email_template_name,
            'subject_template_name': self.subject_template_name,
            'request': self.request,
            'html_email_template_name': self.html_email_template_name,
            'extra_email_context': self.extra_email_context,
        }
        form.save(**opts)
        return JsonResponse({"success": True})


class PasswordResetConfirmView(views.PasswordResetConfirmView):
    template_name = "auth/password_reset_confirm.html"
    success_url = reverse_lazy('lilcity:password_reset_complete')


class PasswordResetComplete(views.PasswordResetCompleteView):
    pass