# Copyright (c) 2016 Catalyst IT Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


from django.conf import settings
from django import http
from django.utils.translation import gettext_lazy as _

from horizon import exceptions
from horizon import forms
from horizon.utils import functions as utils

from adjutant_ui.api import adjutant
from adjutant_ui.content.token import forms as token_forms


def _logout_msg_response(request, msg):
    response = http.HttpResponseRedirect(settings.LOGOUT_URL)
    utils.add_logout_reason(request, response, msg)
    return response


def _logout_msg_response_success(request, msg):
    response = _logout_msg_response(request, msg)
    response.set_cookie('logout_status', 'success', max_age=10)
    return response


def submit_token_router(request, *args, **kwargs):
    """Routes requests to the correct view, based on submission parameters."""

    # Get details of the token
    token_uuid = kwargs['token']
    token = adjutant.token_get(request, token_uuid, {})
    if not token or token.status_code != 200:
        msg = _("Invalid token. Please request another.")
        return _logout_msg_response(request, msg)

    json = token.json()
    if 'password' in json['required_fields']:
        return SubmitTokenPasswordView.as_view()(request, *args, **kwargs)
    elif 'confirm' in json['required_fields']:

        if 'UpdateUserEmailAction' in json['actions']:
            return UpdateEmailTokenSubmitView.as_view()(
                request, *args, **kwargs)
        return SubmitTokenConfirmView.as_view()(request, *args, **kwargs)

    return _logout_msg_response(request, _("Unsupported token type."))


class SubmitTokenPasswordView(forms.ModalFormView):
    form_class = token_forms.PasswordForm
    template_name = 'token/setpassword.html'

    def get(self, request, *args, **kwargs):
        sc = super(SubmitTokenPasswordView, self)
        return sc.get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        sc = super(SubmitTokenPasswordView, self)
        return sc.post(request, *args, **kwargs)

    def form_valid(self, form):
        # All form data has been validated and POSTed.
        # We can now submit the token for processing along with parameters.
        # All codepaths here return a Redirect response.
        parameters = {
            'password': form.cleaned_data['new_password']
        }
        token_uuid = self.kwargs['token']
        token_response = adjutant.token_submit(form.request,
                                               token_uuid,
                                               parameters)

        if token_response.ok:
            msg = _("Password successfully set. Please log in to continue.")
            return _logout_msg_response_success(form.request, msg)

        msg = (_("Token form submission failed. Response code %(code)s.") %
               {'code': token_response.status_code})
        return _logout_msg_response(form.request, msg)

    def get_context_data(self, **kwargs):
        sc = super(SubmitTokenPasswordView, self)
        context = sc.get_context_data(**kwargs)
        try:
            context['token'] = self.kwargs['token']
        except Exception:
            exceptions.handle(self.request)
        return context


class SubmitTokenConfirmView(forms.ModalFormView):
    form_class = token_forms.ConfirmForm
    template_name = 'token/tokenconfirm.html'
    success_msg = _("Welcome to the project! Please log in to continue.")

    def get(self, request, *args, **kwargs):
        sc = super(SubmitTokenConfirmView, self)
        return sc.get(request, *args, **kwargs)

    def post(self, request, *args, **kwargs):
        sc = super(SubmitTokenConfirmView, self)
        return sc.post(request, *args, **kwargs)

    def form_valid(self, form):
        token_uuid = self.kwargs['token']
        parameters = {
            'confirm': True
        }
        token_response = adjutant.token_submit(form.request,
                                               token_uuid,
                                               parameters)

        if token_response.ok:
            return _logout_msg_response_success(form.request, self.success_msg)

        msg = (_("Token form submission failed. "
                 "Response code %(code)s.") % {'code':
                                               token_response.status_code})
        return _logout_msg_response(form.request, msg)

    def get_context_data(self, **kwargs):
        sc = super(SubmitTokenConfirmView, self)
        context = sc.get_context_data(**kwargs)
        try:
            context['token'] = self.kwargs['token']
        except Exception:
            exceptions.handle(self.request)
        return context


class UpdateEmailTokenSubmitView(SubmitTokenConfirmView):
    template_name = 'token/emailtokenconfirm.html'
    success_msg = _("Your email has been updated! Please log in to continue.")