import jwt
import pytest
from aiohttp import web

from aiohttp_security import setup as _setup
from aiohttp_security import AbstractAuthorizationPolicy
from aiohttp_security.api import IDENTITY_KEY
from aiohttp_security.jwt_identity import JWTIdentityPolicy


@pytest.fixture
def make_token():
    def factory(payload, secret):
        return jwt.encode(
            payload,
            secret,
            algorithm='HS256',
        )

    return factory


class Autz(AbstractAuthorizationPolicy):

    async def permits(self, identity, permission, context=None):
        pass

    async def authorized_userid(self, identity):
        pass


async def test_no_pyjwt_installed(mocker):
    mocker.patch('aiohttp_security.jwt_identity.jwt', None)
    with pytest.raises(RuntimeError):
        JWTIdentityPolicy('secret')


async def test_identify(loop, make_token, test_client):
    kwt_secret_key = 'Key'

    token = make_token({'login': 'Andrew'}, kwt_secret_key)

    async def check(request):
        policy = request.app[IDENTITY_KEY]
        identity = await policy.identify(request)
        assert 'Andrew' == identity['login']
        return web.Response()

    app = web.Application(loop=loop)
    _setup(app, JWTIdentityPolicy(kwt_secret_key), Autz())
    app.router.add_route('GET', '/', check)

    client = await test_client(app)
    headers = {'Authorization': 'Bearer {}'.format(token.decode('utf-8'))}
    resp = await client.get('/', headers=headers)
    assert 200 == resp.status


async def test_identify_broken_scheme(loop, make_token, test_client):
    kwt_secret_key = 'Key'

    token = make_token({'login': 'Andrew'}, kwt_secret_key)

    async def check(request):
        policy = request.app[IDENTITY_KEY]

        try:
            await policy.identify(request)
        except ValueError as exc:
            raise web.HTTPBadRequest(reason=exc)

        return web.Response()

    app = web.Application(loop=loop)
    _setup(app, JWTIdentityPolicy(kwt_secret_key), Autz())
    app.router.add_route('GET', '/', check)

    client = await test_client(app)
    headers = {'Authorization': 'Token {}'.format(token.decode('utf-8'))}
    resp = await client.get('/', headers=headers)
    assert 400 == resp.status
    assert 'Invalid authorization scheme' in resp.reason