"""Tests for acme.standalone."""
import socket
import threading
import unittest

import josepy as jose
import mock
import requests
from six.moves import http_client  # pylint: disable=import-error
from six.moves import socketserver  # type: ignore  # pylint: disable=import-error

from acme import challenges
from acme.magic_typing import Set  # pylint: disable=unused-import, no-name-in-module
import test_util


class TLSServerTest(unittest.TestCase):
    """Tests for acme.standalone.TLSServer."""


    def test_bind(self):  # pylint: disable=no-self-use
        from acme.standalone import TLSServer
        server = TLSServer(
            ('', 0), socketserver.BaseRequestHandler, bind_and_activate=True)
        server.server_close()

    def test_ipv6(self):
        if socket.has_ipv6:
            from acme.standalone import TLSServer
            server = TLSServer(
                ('', 0), socketserver.BaseRequestHandler, bind_and_activate=True, ipv6=True)
            server.server_close()


class HTTP01ServerTest(unittest.TestCase):
    """Tests for acme.standalone.HTTP01Server."""


    def setUp(self):
        self.account_key = jose.JWK.load(
            test_util.load_vector('rsa1024_key.pem'))
        self.resources = set() # type: Set

        from acme.standalone import HTTP01Server
        self.server = HTTP01Server(('', 0), resources=self.resources)

        self.port = self.server.socket.getsockname()[1]
        self.thread = threading.Thread(target=self.server.serve_forever)
        self.thread.start()

    def tearDown(self):
        self.server.shutdown()
        self.thread.join()

    def test_index(self):
        response = requests.get(
            'http://localhost:{0}'.format(self.port), verify=False)
        self.assertEqual(
            response.text, 'ACME client standalone challenge solver')
        self.assertTrue(response.ok)

    def test_404(self):
        response = requests.get(
            'http://localhost:{0}/foo'.format(self.port), verify=False)
        self.assertEqual(response.status_code, http_client.NOT_FOUND)

    def _test_http01(self, add):
        chall = challenges.HTTP01(token=(b'x' * 16))
        response, validation = chall.response_and_validation(self.account_key)

        from acme.standalone import HTTP01RequestHandler
        resource = HTTP01RequestHandler.HTTP01Resource(
            chall=chall, response=response, validation=validation)
        if add:
            self.resources.add(resource)
        return resource.response.simple_verify(
            resource.chall, 'localhost', self.account_key.public_key(),
            port=self.port)

    def test_http01_found(self):
        self.assertTrue(self._test_http01(add=True))

    def test_http01_not_found(self):
        self.assertFalse(self._test_http01(add=False))


class BaseDualNetworkedServersTest(unittest.TestCase):
    """Test for acme.standalone.BaseDualNetworkedServers."""


    class SingleProtocolServer(socketserver.TCPServer):
        """Server that only serves on a single protocol. FreeBSD has this behavior for AF_INET6."""
        def __init__(self, *args, **kwargs):
            ipv6 = kwargs.pop("ipv6", False)
            if ipv6:
                self.address_family = socket.AF_INET6
                kwargs["bind_and_activate"] = False
            else:
                self.address_family = socket.AF_INET
            socketserver.TCPServer.__init__(self, *args, **kwargs)
            if ipv6:
                # NB: On Windows, socket.IPPROTO_IPV6 constant may be missing.
                # We use the corresponding value (41) instead.
                level = getattr(socket, "IPPROTO_IPV6", 41)
                self.socket.setsockopt(level, socket.IPV6_V6ONLY, 1)
                try:
                    self.server_bind()
                    self.server_activate()
                except:
                    self.server_close()
                    raise

    @mock.patch("socket.socket.bind")
    def test_fail_to_bind(self, mock_bind):
        mock_bind.side_effect = socket.error
        from acme.standalone import BaseDualNetworkedServers
        self.assertRaises(socket.error, BaseDualNetworkedServers,
                          BaseDualNetworkedServersTest.SingleProtocolServer,
                          ('', 0),
                          socketserver.BaseRequestHandler)

    def test_ports_equal(self):
        from acme.standalone import BaseDualNetworkedServers
        servers = BaseDualNetworkedServers(
            BaseDualNetworkedServersTest.SingleProtocolServer,
            ('', 0),
            socketserver.BaseRequestHandler)
        socknames = servers.getsocknames()
        prev_port = None
        # assert ports are equal
        for sockname in socknames:
            port = sockname[1]
            if prev_port:
                self.assertEqual(prev_port, port)
            prev_port = port


class HTTP01DualNetworkedServersTest(unittest.TestCase):
    """Tests for acme.standalone.HTTP01DualNetworkedServers."""


    def setUp(self):
        self.account_key = jose.JWK.load(
            test_util.load_vector('rsa1024_key.pem'))
        self.resources = set() # type: Set

        from acme.standalone import HTTP01DualNetworkedServers
        self.servers = HTTP01DualNetworkedServers(('', 0), resources=self.resources)

        self.port = self.servers.getsocknames()[0][1]
        self.servers.serve_forever()

    def tearDown(self):
        self.servers.shutdown_and_server_close()

    def test_index(self):
        response = requests.get(
            'http://localhost:{0}'.format(self.port), verify=False)
        self.assertEqual(
            response.text, 'ACME client standalone challenge solver')
        self.assertTrue(response.ok)

    def test_404(self):
        response = requests.get(
            'http://localhost:{0}/foo'.format(self.port), verify=False)
        self.assertEqual(response.status_code, http_client.NOT_FOUND)

    def _test_http01(self, add):
        chall = challenges.HTTP01(token=(b'x' * 16))
        response, validation = chall.response_and_validation(self.account_key)

        from acme.standalone import HTTP01RequestHandler
        resource = HTTP01RequestHandler.HTTP01Resource(
            chall=chall, response=response, validation=validation)
        if add:
            self.resources.add(resource)
        return resource.response.simple_verify(
            resource.chall, 'localhost', self.account_key.public_key(),
            port=self.port)

    def test_http01_found(self):
        self.assertTrue(self._test_http01(add=True))

    def test_http01_not_found(self):
        self.assertFalse(self._test_http01(add=False))


if __name__ == "__main__":
    unittest.main()  # pragma: no cover