"""passbook core user views"""
from django.contrib import messages
from django.contrib.auth import logout, update_session_auth_hash
from django.contrib.messages.views import SuccessMessageMixin
from django.forms.utils import ErrorList
from django.shortcuts import redirect, reverse
from django.urls import reverse_lazy
from django.utils.translation import gettext as _
from django.views.generic import DeleteView, FormView, UpdateView

from passbook.core.exceptions import PasswordPolicyInvalid
from passbook.core.forms.users import PasswordChangeForm, UserDetailForm
from passbook.lib.config import CONFIG


class UserSettingsView(SuccessMessageMixin, UpdateView):
    """Update User settings"""

    template_name = 'user/settings.html'
    form_class = UserDetailForm

    success_message = _('Successfully updated user.')
    success_url = reverse_lazy('passbook_core:user-settings')

    def get_object(self):
        return self.request.user

class UserDeleteView(DeleteView):
    """Delete user account"""

    template_name = 'generic/delete.html'

    def get_object(self):
        return self.request.user

    def get_success_url(self):
        messages.success(self.request, _('Successfully deleted user.'))
        logout(self.request)
        return reverse('passbook_core:auth-login')

class UserChangePasswordView(FormView):
    """View for users to update their password"""

    form_class = PasswordChangeForm
    template_name = 'login/form_with_user.html'

    def form_valid(self, form: PasswordChangeForm):
        try:
            # user.set_password checks against Policies so we don't need to manually do it here
            self.request.user.set_password(form.cleaned_data.get('password'))
            self.request.user.save()
            update_session_auth_hash(self.request, self.request.user)
            messages.success(self.request, _('Successfully changed password'))
        except PasswordPolicyInvalid as exc:
            # Manually inject error into form
            # pylint: disable=protected-access
            errors = form._errors.setdefault("password_repeat", ErrorList(''))
            # pylint: disable=protected-access
            errors = form._errors.setdefault("password", ErrorList())
            for error in exc.messages:
                errors.append(error)
            return self.form_invalid(form)
        return redirect('passbook_core:overview')

    def get_context_data(self, **kwargs):
        kwargs['config'] = CONFIG.get('passbook')
        kwargs['is_login'] = True
        kwargs['title'] = _('Change Password')
        kwargs['primary_action'] = _('Change')
        return super().get_context_data(**kwargs)