# coding: utf8

import logging
from unittest import TestCase
from argparse import ArgumentError

from daphne.cli import CommandLineInterface
from daphne.endpoints import build_endpoint_description_strings as build


class TestEndpointDescriptions(TestCase):
    """
    Tests that the endpoint parsing/generation works as intended.
    """

    def testBasics(self):
        self.assertEqual(build(), [], msg="Empty list returned when no kwargs given")

    def testTcpPortBindings(self):
        self.assertEqual(
            build(port=1234, host="example.com"),
            ["tcp:port=1234:interface=example.com"]
        )

        self.assertEqual(
            build(port=8000, host="127.0.0.1"),
            ["tcp:port=8000:interface=127.0.0.1"]
        )

        self.assertEqual(
            build(port=8000, host="[200a::1]"),
            [r'tcp:port=8000:interface=200a\:\:1']
        )

        self.assertEqual(
            build(port=8000, host="200a::1"),
            [r'tcp:port=8000:interface=200a\:\:1']
        )

        # incomplete port/host kwargs raise errors
        self.assertRaises(
            ValueError,
            build, port=123
        )
        self.assertRaises(
            ValueError,
            build, host="example.com"
        )

    def testUnixSocketBinding(self):
        self.assertEqual(
            build(unix_socket="/tmp/daphne.sock"),
            ["unix:/tmp/daphne.sock"]
        )

    def testFileDescriptorBinding(self):
        self.assertEqual(
            build(file_descriptor=5),
            ["fd:fileno=5"]
        )

    def testMultipleEnpoints(self):
        self.assertEqual(
            sorted(
                build(
                    file_descriptor=123,
                    unix_socket="/tmp/daphne.sock",
                    port=8080,
                    host="10.0.0.1"
                )
            ),
            sorted([
                "tcp:port=8080:interface=10.0.0.1",
                "unix:/tmp/daphne.sock",
                "fd:fileno=123"
            ])
        )


class TestCLIInterface(TestCase):
    """
    Tests the overall CLI class.
    """

    class TestedCLI(CommandLineInterface):
        """
        CommandLineInterface subclass that we used for testing (has a fake
        server subclass).
        """

        class TestedServer:
            """
            Mock server object for testing.
            """

            def __init__(self, **kwargs):
                self.init_kwargs = kwargs

            def run(self):
                pass

        server_class = TestedServer

    def setUp(self):
        logging.disable(logging.CRITICAL)

    def tearDown(self):
        logging.disable(logging.NOTSET)

    def assertCLI(self, args, server_kwargs):
        """
        Asserts that the CLI class passes the right args to the server class.
        Passes in a fake application automatically.
        """
        cli = self.TestedCLI()
        cli.run(args + ["daphne:__version__"])  # We just pass something importable as app
        # Check the server got all arguments as intended
        for key, value in server_kwargs.items():
            # Get the value and sort it if it's a list (for endpoint checking)
            actual_value = cli.server.init_kwargs.get(key)
            if isinstance(actual_value, list):
                actual_value.sort()
            # Check values
            self.assertEqual(
                value,
                actual_value,
                "Wrong value for server kwarg %s: %r != %r" % (
                    key,
                    value,
                    actual_value,
                ),
            )

    def testCLIBasics(self):
        """
        Tests basic endpoint generation.
        """
        self.assertCLI(
            [],
            {
                "endpoints": ["tcp:port=8000:interface=127.0.0.1"],
            },
        )
        self.assertCLI(
            ["-p", "123"],
            {
                "endpoints": ["tcp:port=123:interface=127.0.0.1"],
            },
        )
        self.assertCLI(
            ["-b", "10.0.0.1"],
            {
                "endpoints": ["tcp:port=8000:interface=10.0.0.1"],
            },
        )
        self.assertCLI(
            ["-b", "200a::1"],
            {
                "endpoints": [r'tcp:port=8000:interface=200a\:\:1'],
            },
        )
        self.assertCLI(
            ["-b", "[200a::1]"],
            {
                "endpoints": [r'tcp:port=8000:interface=200a\:\:1'],
            },
        )
        self.assertCLI(
            ["-p", "8080", "-b", "example.com"],
            {
                "endpoints": ["tcp:port=8080:interface=example.com"],
            },
        )

    def testUnixSockets(self):
        self.assertCLI(
            ["-p", "8080", "-u", "/tmp/daphne.sock"],
            {
                "endpoints": [
                    "tcp:port=8080:interface=127.0.0.1",
                    "unix:/tmp/daphne.sock",
                ],
            },
        )
        self.assertCLI(
            ["-b", "example.com", "-u", "/tmp/daphne.sock"],
            {
                "endpoints": [
                    "tcp:port=8000:interface=example.com",
                    "unix:/tmp/daphne.sock",
                ],
            },
        )
        self.assertCLI(
            ["-u", "/tmp/daphne.sock", "--fd", "5"],
            {
                "endpoints": [
                    "fd:fileno=5",
                    "unix:/tmp/daphne.sock"
                ],
            },
        )

    def testMixedCLIEndpointCreation(self):
        """
        Tests mixing the shortcut options with the endpoint string options.
        """
        self.assertCLI(
            ["-p", "8080", "-e", "unix:/tmp/daphne.sock"],
            {
                "endpoints": [
                    "tcp:port=8080:interface=127.0.0.1",
                    "unix:/tmp/daphne.sock"
                ],
            },
        )
        self.assertCLI(
            ["-p", "8080", "-e", "tcp:port=8080:interface=127.0.0.1"],
            {
                "endpoints": [
                    "tcp:port=8080:interface=127.0.0.1",
                    "tcp:port=8080:interface=127.0.0.1",
                ],
            },
        )

    def testCustomEndpoints(self):
        """
        Tests entirely custom endpoints
        """
        self.assertCLI(
            ["-e", "imap:"],
            {
                "endpoints": [
                    "imap:",
                ],
            },
        )

    def test_default_proxyheaders(self):
        """
        Passing `--proxy-headers` without a parameter will use the
        `X-Forwarded-For` header.
        """
        self.assertCLI(
            ['--proxy-headers'],
            {
                'proxy_forwarded_address_header': 'X-Forwarded-For',
            },
        )

    def test_custom_proxyhost(self):
        """
        Passing `--proxy-headers-host` will set the used host header to
        the passed one, and `--proxy-headers` is mandatory.
        """
        self.assertCLI(
            ['--proxy-headers', '--proxy-headers-host', 'blah'],
            {
                'proxy_forwarded_address_header': 'blah',
            },
        )
        with self.assertRaises(expected_exception=ArgumentError) as exc:
            self.assertCLI(
                ['--proxy-headers-host', 'blah'],
                {
                    'proxy_forwarded_address_header': 'blah',
                },
            )
        self.assertEqual(exc.exception.argument_name, '--proxy-headers-host')
        self.assertEqual(
            exc.exception.message,
            '--proxy-headers has to be passed for this parameter.')

    def test_custom_proxyport(self):
        """
        Passing `--proxy-headers-port` will set the used port header to
        the passed one, and `--proxy-headers` is mandatory.
        """
        self.assertCLI(
            ['--proxy-headers', '--proxy-headers-port', 'blah2'],
            {
                'proxy_forwarded_port_header': 'blah2',
            },
        )
        with self.assertRaises(expected_exception=ArgumentError) as exc:
            self.assertCLI(
                ['--proxy-headers-port', 'blah2'],
                {
                    'proxy_forwarded_address_header': 'blah2',
                },
            )
        self.assertEqual(exc.exception.argument_name, '--proxy-headers-port')
        self.assertEqual(
            exc.exception.message,
            '--proxy-headers has to be passed for this parameter.')