from django.conf import settings
from django.contrib import messages
from django.contrib.auth import get_user_model
from django.contrib.auth import login
from django.contrib.auth.decorators import login_required
from django.http import HttpResponseRedirect
from django.urls import reverse
from django.utils import timezone
from django.utils.decorators import method_decorator
from django.utils.translation import gettext_lazy as _
from django.views.generic import DetailView, CreateView, UpdateView
from rest_framework import generics

from apps.gooyal_oauth2.rest_framework import IsAuthenticatedOrTokenMatchesOASRequirements
from apps.gooyal_oauth2.validators import OAuth2Validator
from apps.users.forms import OAUTHLoginRequestForm
# from apps.users.forms import AccountUpdateForm
from apps.users.models import User, OAuthCode

UserModel = get_user_model()


class OAUTHLoginRequestView(CreateView):
    model = OAuthCode
    form_class = OAUTHLoginRequestForm
    template_name = 'users/login_request.html'

    def form_valid(self, form):
        redirect_uri = self.request.build_absolute_uri(reverse('users:login_callback'))
        self.object: OAuthCode = form.save(commit=False)
        self.object.redirect_uri = redirect_uri
        self.object.generate_code_verifier()
        self.object.save()
        return HttpResponseRedirect(self.object.generate_login_url())

    def form_invalid(self, form):
        for error_key in form.errors:
            for error_list in form.errors[error_key].data:
                for error in error_list:
                    key = _(error_key)
                    messages.error(self.request, f"{key}: {error}")

        return super().form_invalid(form)


class OAUTHLoginCallbackView(DetailView):
    model = OAuthCode
    template_name = 'users/login_callback.html'

    def get_object(self, queryset=None):
        state = self.request.GET.get('state')
        code = self.request.GET.get('code')
        obj = OAuthCode.objects.filter(pk=state).first()
        if obj:
            obj.code = code
            obj.save()
            return obj

    def introspect_token(self, token):
        url = settings.OAUTH2_PROVIDER['RESOURCE_SERVER_INTROSPECTION_URL']
        credentials = settings.OAUTH2_PROVIDER['RESOURCE_SERVER_INTROSPECTION_CREDENTIALS']
        validator = OAuth2Validator()
        access_token = validator._get_token_from_authentication_server(token, url, None, credentials)
        return access_token

    def get_context_data(self, **kwargs):
        redirect_uri = self.request.build_absolute_uri(reverse('users:login_callback'))
        data = self.object.validate_code(redirect_uri=redirect_uri)
        # {'access_token': 'WhnIAfci6yIyTsh63PPqM1HXfXqKvr', 'expires_in': 36000, 'token_type': 'Bearer',
        #  'scope': 'wallet.wallet:get_balance wallet.transaction:list',
        #  'refresh_token': 'qRHFXXc3R3EiQKUq5BcSY2b9xuTm0d'}
        #
        # from oauth2_provider.models import get_access_token_model, get_application_model
        access_token = self.introspect_token(data['access_token'])
        login(self.request, access_token.user, backend='django.contrib.auth.backends.ModelBackend')
        # AccessToken = get_access_token_model()
        # access_token = AccessToken.objects.create(
        #     token=data['access_token'],
        #     scope=data['scope'],
        #     expires=timezone.now() + timedelta(data['scope']),
        # )

        return super().get_context_data(**kwargs)


@method_decorator(login_required, name='dispatch')
class AccountDetailView(DetailView):
    model = User
    template_name = 'users/account_detail.html'

    def get_object(self, queryset=None):
        return self.request.user


@method_decorator(login_required, name='dispatch')
class AccountUpdateView(UpdateView):
    model = User
    template_name = 'users/account_update.html'
    # form_class = AccountUpdateForm

    def get_success_url(self):
        messages.success(self.request, 'عملیات انجام شد.')
        return reverse('users:account_detail')

    def get_object(self, queryset=None):
        return self.request.user