from __future__ import unicode_literals
from django.test import TestCase
from django.test.client import RequestFactory
from rest_framework import status
from rest_framework.response import Response
from rest_framework import viewsets
from rest_framework.decorators import link, action
from rest_framework.routers import SimpleRouter
import copy

factory = RequestFactory()


class BasicViewSet(viewsets.ViewSet):
    def list(self, request, *args, **kwargs):
        return Response({'method': 'list'})

    @action()
    def action1(self, request, *args, **kwargs):
        return Response({'method': 'action1'})

    @action()
    def action2(self, request, *args, **kwargs):
        return Response({'method': 'action2'})

    @link()
    def link1(self, request, *args, **kwargs):
        return Response({'method': 'link1'})

    @link()
    def link2(self, request, *args, **kwargs):
        return Response({'method': 'link2'})


class TestSimpleRouter(TestCase):
    def setUp(self):
        self.router = SimpleRouter()

    def test_link_and_action_decorator(self):
        routes = self.router.get_routes(BasicViewSet)
        decorator_routes = routes[2:]
        # Make sure all these endpoints exist and none have been clobbered
        for i, endpoint in enumerate(['action1', 'action2', 'link1', 'link2']):
            route = decorator_routes[i]
            # check url listing
            self.assertEqual(route.url,
                             '^{{prefix}}/{{lookup}}/{0}/$'.format(endpoint))
            # check method to function mapping
            if endpoint.startswith('action'):
                method_map = 'post'
            else:
                method_map = 'get'
            self.assertEqual(route.mapping[method_map], endpoint)