from django.http import HttpResponse, HttpResponseRedirect
from django.test.client import RequestFactory
from django.urls import resolve
import pytest
from six import b

from openapi_core.contrib.django import (
    DjangoOpenAPIRequest, DjangoOpenAPIResponse,
)
from openapi_core.shortcuts import create_spec
from openapi_core.validation.request.datatypes import RequestParameters
from openapi_core.validation.request.validators import RequestValidator
from openapi_core.validation.response.validators import ResponseValidator


@pytest.fixture(autouse=True, scope='module')
def django_settings():
    import django
    from django.conf import settings
    from django.contrib import admin
    from django.urls import path
    settings.configure(
        ALLOWED_HOSTS=[
            'testserver',
        ],
        INSTALLED_APPS=[
            'django.contrib.admin',
            'django.contrib.auth',
            'django.contrib.contenttypes',
            'django.contrib.messages',
            'django.contrib.sessions',
        ],
        MIDDLEWARE=[
            'django.contrib.sessions.middleware.SessionMiddleware',
            'django.contrib.auth.middleware.AuthenticationMiddleware',
            'django.contrib.messages.middleware.MessageMiddleware',
        ]
    )
    django.setup()
    settings.ROOT_URLCONF = (
        path('admin/', admin.site.urls),
    )


class TestDjangoOpenAPIRequest(object):

    @pytest.fixture
    def request_factory(self):
        return RequestFactory()

    def test_no_resolver(self, request_factory):
        request = request_factory.get('/admin/')

        openapi_request = DjangoOpenAPIRequest(request)

        path = {}
        query = {}
        headers = {
            'Cookie': '',
        }
        cookies = {}
        assert openapi_request.parameters == RequestParameters(
            path=path,
            query=query,
            header=headers,
            cookie=cookies,
        )
        assert openapi_request.host_url == request._current_scheme_host
        assert openapi_request.path == request.path
        assert openapi_request.method == request.method.lower()
        assert openapi_request.path_pattern == request.path
        assert openapi_request.body == request.body
        assert openapi_request.mimetype == request.content_type

    def test_simple(self, request_factory):
        request = request_factory.get('/admin/')
        request.resolver_match = resolve('/admin/')

        openapi_request = DjangoOpenAPIRequest(request)

        path = {}
        query = {}
        headers = {
            'Cookie': '',
        }
        cookies = {}
        assert openapi_request.parameters == RequestParameters(
            path=path,
            query=query,
            header=headers,
            cookie=cookies,
        )
        assert openapi_request.host_url == request._current_scheme_host
        assert openapi_request.path == request.path
        assert openapi_request.method == request.method.lower()
        assert openapi_request.path_pattern == request.path
        assert openapi_request.body == request.body
        assert openapi_request.mimetype == request.content_type

    def test_url_rule(self, request_factory):
        request = request_factory.get('/admin/auth/group/1/')
        request.resolver_match = resolve('/admin/auth/group/1/')

        openapi_request = DjangoOpenAPIRequest(request)

        path = {
            'object_id': '1',
        }
        query = {}
        headers = {
            'Cookie': '',
        }
        cookies = {}
        assert openapi_request.parameters == RequestParameters(
            path=path,
            query=query,
            header=headers,
            cookie=cookies,
        )
        assert openapi_request.host_url == request._current_scheme_host
        assert openapi_request.path == request.path
        assert openapi_request.method == request.method.lower()
        assert openapi_request.path_pattern == \
            "/admin/auth/group/{object_id}/"
        assert openapi_request.body == request.body
        assert openapi_request.mimetype == request.content_type


class TestDjangoOpenAPIResponse:

    def test_stream_response(self):
        response = HttpResponse()
        response.writelines(['foo\n', 'bar\n', 'baz\n'])

        openapi_response = DjangoOpenAPIResponse(response)

        assert openapi_response.data == b('foo\nbar\nbaz\n')
        assert openapi_response.status_code == response.status_code
        assert openapi_response.mimetype == response["Content-Type"]

    def test_redirect_response(self):
        response = HttpResponseRedirect('/redirected/')

        openapi_response = DjangoOpenAPIResponse(response)

        assert openapi_response.data == response.content
        assert openapi_response.status_code == response.status_code
        assert openapi_response.mimetype == response["Content-Type"]


class TestDjangoOpenAPIValidation(object):

    @pytest.fixture
    def request_factory(self):
        return RequestFactory()

    @pytest.fixture
    def django_spec(self, factory):
        specfile = 'data/v3.0/django_factory.yaml'
        return create_spec(factory.spec_from_file(specfile))

    def test_response_validator_path_pattern(
            self, django_spec, request_factory):
        validator = ResponseValidator(django_spec)
        request = request_factory.get('/admin/auth/group/1/')
        request.resolver_match = resolve('/admin/auth/group/1/')
        openapi_request = DjangoOpenAPIRequest(request)
        response = HttpResponse(b('Some item'))
        openapi_response = DjangoOpenAPIResponse(response)
        result = validator.validate(openapi_request, openapi_response)
        assert not result.errors

    def test_request_validator_path_pattern(
            self, django_spec, request_factory):
        validator = RequestValidator(django_spec)
        request = request_factory.get('/admin/auth/group/1/')
        request.resolver_match = resolve('/admin/auth/group/1/')
        openapi_request = DjangoOpenAPIRequest(request)
        result = validator.validate(openapi_request)
        assert not result.errors