import mock
import os
from typing import Any, Dict
import unittest
from .server_test_lib import BotServerTestCase
import json
from importlib import import_module
from types import ModuleType

from zulip_botserver import server
from zulip_botserver.input_parameters import parse_args


class BotServerTests(BotServerTestCase):
    class MockMessageHandler:
        def handle_message(self, message: Dict[str, str], bot_handler: Any) -> None:
            assert message == {'key': "test message"}

    class MockLibModule:
        def handler_class(self) -> Any:
            return BotServerTests.MockMessageHandler()

    def test_successful_request(self) -> None:
        available_bots = ['helloworld']
        bots_config = {
            'helloworld': {
                'email': 'helloworld-bot@zulip.com',
                'key': '123456789qwertyuiop',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        self.assert_bot_server_response(available_bots=available_bots,
                                        bots_config=bots_config,
                                        event=dict(message={'content': "@**test** test message"},
                                                   bot_email='helloworld-bot@zulip.com',
                                                   trigger='mention',
                                                   token='abcd1234'),
                                        expected_response="beep boop",
                                        check_success=True)

    def test_successful_request_from_two_bots(self) -> None:
        available_bots = ['helloworld', 'help']
        bots_config = {
            'helloworld': {
                'email': 'helloworld-bot@zulip.com',
                'key': '123456789qwertyuiop',
                'site': 'http://localhost',
                'token': 'abcd1234',
            },
            'help': {
                'email': 'help-bot@zulip.com',
                'key': '123456789qwertyuiop',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        self.assert_bot_server_response(available_bots=available_bots,
                                        event=dict(message={'content': "@**test** test message"},
                                                   bot_email='helloworld-bot@zulip.com',
                                                   trigger='mention',
                                                   token='abcd1234'),
                                        expected_response="beep boop",
                                        bots_config=bots_config,
                                        check_success=True)

    def test_request_for_unkown_bot(self) -> None:
        bots_config = {
            'helloworld': {
                'email': 'helloworld-bot@zulip.com',
                'key': '123456789qwertyuiop',
                'site': 'http://localhost',
                'token': 'abcd1234',
            },
        }
        self.assert_bot_server_response(available_bots=['helloworld'],
                                        event=dict(message={'content': "test message"},
                                                   bot_email='unknown-bot@zulip.com'),
                                        bots_config=bots_config,
                                        check_success=False)

    def test_wrong_bot_token(self) -> None:
        available_bots = ['helloworld']
        bots_config = {
            'helloworld': {
                'email': 'helloworld-bot@zulip.com',
                'key': '123456789qwertyuiop',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        self.assert_bot_server_response(available_bots=available_bots,
                                        bots_config=bots_config,
                                        event=dict(message={'content': "@**test** test message"},
                                                   bot_email='helloworld-bot@zulip.com',
                                                   trigger='mention',
                                                   token='wrongtoken'),
                                        check_success=False)

    @mock.patch('logging.error')
    @mock.patch('zulip_bots.lib.StateHandler')
    def test_wrong_bot_credentials(self, mock_StateHandler: mock.Mock, mock_LoggingError: mock.Mock) -> None:
        available_bots = ['nonexistent-bot']
        bots_config = {
            'nonexistent-bot': {
                'email': 'helloworld-bot@zulip.com',
                'key': '123456789qwertyuiop',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        # This works, but mypy still complains:
        # error: No overload variant of "assertRaisesRegexp" of "TestCase" matches argument types
        # [def (*args: builtins.object, **kwargs: builtins.object) -> builtins.SystemExit, builtins.str]
        with self.assertRaisesRegexp(SystemExit,  # type: ignore
                                     'Error: Bot "nonexistent-bot" doesn\'t exist. Please make '
                                     'sure you have set up the botserverrc file correctly.'):
            self.assert_bot_server_response(
                available_bots=available_bots,
                event=dict(message={'content': "@**test** test message"},
                           bot_email='helloworld-bot@zulip.com',
                           trigger='mention',
                           token='abcd1234'),
                bots_config=bots_config)

    @mock.patch('sys.argv', ['zulip-botserver', '--config-file', '/foo/bar/baz.conf'])
    def test_argument_parsing_defaults(self) -> None:
        opts = parse_args()
        assert opts.config_file == '/foo/bar/baz.conf'
        assert opts.bot_name is None
        assert opts.bot_config_file is None
        assert opts.hostname == '127.0.0.1'
        assert opts.port == 5002

    def test_read_config_file(self) -> None:
        with self.assertRaises(IOError):
            server.read_config_file("nonexistentfile.conf")
        current_dir = os.path.dirname(os.path.abspath(__file__))

        # No bot specified; should read all bot configs.
        bot_conf1 = server.read_config_file(os.path.join(current_dir, "test.conf"))
        expected_config1 = {
            'helloworld': {
                'email': 'helloworld-bot@zulip.com',
                'key': 'value',
                'site': 'http://localhost',
                'token': 'abcd1234',
            },
            'giphy': {
                'email': 'giphy-bot@zulip.com',
                'key': 'value2',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        assert json.dumps(bot_conf1, sort_keys=True) == json.dumps(expected_config1, sort_keys=True)

        # Specified bot exists; should read only that section.
        bot_conf3 = server.read_config_file(os.path.join(current_dir, "test.conf"), "giphy")
        expected_config3 = {
            'giphy': {
                'email': 'giphy-bot@zulip.com',
                'key': 'value2',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        assert json.dumps(bot_conf3, sort_keys=True) == json.dumps(expected_config3, sort_keys=True)

        # Specified bot doesn't exist; should read the first section of the config.
        bot_conf2 = server.read_config_file(os.path.join(current_dir, "test.conf"), "redefined_bot")
        expected_config2 = {
            'redefined_bot': {
                'email': 'helloworld-bot@zulip.com',
                'key': 'value',
                'site': 'http://localhost',
                'token': 'abcd1234',
            }
        }
        assert json.dumps(bot_conf2, sort_keys=True) == json.dumps(expected_config2, sort_keys=True)

    def test_load_lib_modules(self) -> None:
        # This testcase requires hardcoded paths, which here is a good thing so if we ever
        # restructure zulip_bots, this test would fail and we would also update Botserver
        # at the same time.
        helloworld = import_module('zulip_bots.bots.{bot}.{bot}'.format(bot='helloworld'))
        root_dir = os.path.normpath(os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../'))
        # load valid module name
        module = server.load_lib_modules(['helloworld'])['helloworld']
        assert module == helloworld

        # load valid file path
        path = os.path.join(root_dir, 'zulip_bots/zulip_bots/bots/{bot}/{bot}.py'.format(bot='helloworld'))
        module = server.load_lib_modules([path])[path]
        assert module.__name__ == 'custom_bot_module'
        assert module.__file__ == path
        assert isinstance(module, ModuleType)

        # load invalid module name
        with self.assertRaisesRegexp(SystemExit,  # type: ignore
                                     'Error: Bot "botserver-test-case-random-bot" doesn\'t exist. '
                                     'Please make sure you have set up the botserverrc file correctly.'):
            module = server.load_lib_modules(['botserver-test-case-random-bot'])['botserver-test-case-random-bot']

        # load invalid file path
        with self.assertRaisesRegexp(SystemExit,  # type: ignore
                                     'Error: Bot "{}/zulip_bots/zulip_bots/bots/helloworld.py" doesn\'t exist. '
                                     'Please make sure you have set up the botserverrc file correctly.'.format(root_dir)):
            path = os.path.join(root_dir, 'zulip_bots/zulip_bots/bots/{bot}.py'.format(bot='helloworld'))
            module = server.load_lib_modules([path])[path]

if __name__ == '__main__':
    unittest.main()
