# Copyright The IETF Trust 2017, All Rights Reserved
# -*- coding: utf-8 -*-

from __future__ import unicode_literals

from jwcrypto.jwk import JWK

from django.conf import settings
from django.http import HttpResponse
from django.shortcuts import render
from django.urls import reverse

from tastypie.exceptions import BadRequest
from tastypie.utils.mime import determine_format, build_content_type
from tastypie.utils import is_valid_jsonp_callback_value

import debug                            # pyflakes:ignore

from ietf.api import Serializer, _api_list

def top_level(request):
    available_resources = {}

    apitop = reverse('ietf.api.views.top_level')

    for name in sorted([ name for name, api in _api_list if len(api._registry) > 0 ]):
        available_resources[name] = {
            'list_endpoint': '%s/%s/' % (apitop, name),
        }

    serializer = Serializer()
    desired_format = determine_format(request, serializer)

    options = {}

    if 'text/javascript' in desired_format:
        callback = request.GET.get('callback', 'callback')

        if not is_valid_jsonp_callback_value(callback):
            raise BadRequest('JSONP callback name is invalid.')

        options['callback'] = callback

    serialized = serializer.serialize(available_resources, desired_format, options)
    return HttpResponse(content=serialized, content_type=build_content_type(desired_format))

def api_help(request):
    key = JWK()
    # import just public part here, for display in info page
    key.import_from_pem(settings.API_PUBLIC_KEY_PEM)
    return render(request, "api/index.html", {'key': key, 'settings':settings, })