from openslides.core.config import ConfigVariable, config
from openslides.core.exceptions import ConfigError
from openslides.utils.test import TestCase


class TTestConfigException(Exception):
    pass


class HandleConfigTest(TestCase):
    def setUp(self):
        # Save the old value of the config object and add the test values
        # TODO: Can be changed to setUpClass when Django 1.8 is no longer supported
        self._config_values = config.config_variables.copy()
        config.update_config_variables(set_grouped_config_view())
        config.update_config_variables(set_simple_config_view())
        config.update_config_variables(set_simple_config_view_multiple_vars())
        config.update_config_variables(set_simple_config_collection_disabled_view())
        config.update_config_variables(set_simple_config_collection_with_callback())
        config.save_default_values()

    def tearDown(self):
        # Reset the config variables
        config.config_variables = self._config_values
        super().tearDown()

    def get_config_var(self, key):
        return config[key]

    def set_config_var(self, key, value):
        config[key] = value

    def test_get_multiple_config_var_error(self):
        with self.assertRaisesMessage(
            ConfigError,
            "Too many values for config variables {'multiple_config_var'} found.",
        ):
            config.update_config_variables(set_simple_config_view_multiple_vars())

    def test_setup_config_var(self):
        self.assertRaises(TypeError, ConfigVariable)
        self.assertRaises(TypeError, ConfigVariable, name="foo")
        self.assertRaises(TypeError, ConfigVariable, default_value="foo")

    def test_config_exists(self):
        self.assertTrue(config.exists("string_var"))
        self.assertFalse(config.exists("unknown_config_var"))

    def test_set_value_before_getting_it(self):
        """
        Try to call __setitem__ before __getitem__.
        """
        config["additional_config_var"] = "value"

    def test_on_change(self):
        """
        Tests that the special callback is called and raises a special
        message.
        """
        with self.assertRaisesMessage(
            TTestConfigException,
            "Change callback dhcnfg34dlg06kdg successfully called.",
        ):
            self.set_config_var(
                key="var_with_callback_ghvnfjd5768gdfkwg0hm2",
                value="new_string_kbmbnfhdgibkdjshg452bc",
            )

        self.assertEqual(
            config["var_with_callback_ghvnfjd5768gdfkwg0hm2"],
            "new_string_kbmbnfhdgibkdjshg452bc",
        )


def set_grouped_config_view():
    """
    Sets a grouped config collection. There are some variables, one variable
    with a string as default value, one with a boolean as default value,
    one with an integer as default value, one with choices and one hidden
    variable. These variables are grouped in two subgroups.
    """
    yield ConfigVariable(
        name="string_var",
        default_value="default_string_rien4ooCZieng6ah",
        group="Config vars for testing 1",
        subgroup="Group 1 aiYeix2mCieQuae3",
    )
    yield ConfigVariable(
        name="bool_var",
        default_value=True,
        input_type="boolean",
        group="Config vars for testing 1",
        subgroup="Group 1 aiYeix2mCieQuae3",
    )
    yield ConfigVariable(
        name="integer_var",
        default_value=3,
        input_type="integer",
        group="Config vars for testing 1",
        subgroup="Group 1 aiYeix2mCieQuae3",
    )

    yield ConfigVariable(
        name="hidden_var",
        default_value="hidden_value",
        group="Config vars for testing 1",
        subgroup="Group 2 Toongai7ahyahy7B",
    )
    yield ConfigVariable(
        name="choices_var",
        default_value="1",
        input_type="choice",
        choices=(
            {"value": "1", "display_name": "Choice One Ughoch4ocoche6Ee"},
            {"value": "2", "display_name": "Choice Two Vahnoh5yalohv5Eb"},
        ),
        group="Config vars for testing 1",
        subgroup="Group 2 Toongai7ahyahy7B",
    )


def set_simple_config_view():
    """
    Sets a simple config view with some config variables but without
    grouping.
    """
    yield ConfigVariable(name="additional_config_var", default_value="BaeB0ahcMae3feem")
    yield ConfigVariable(name="additional_config_var_2", default_value="")
    yield ConfigVariable(name="none_config_var", default_value=None)


def set_simple_config_view_multiple_vars():
    """
    Sets a bad config view with some multiple config vars.
    """
    yield ConfigVariable(name="multiple_config_var", default_value="foobar1")
    yield ConfigVariable(name="multiple_config_var", default_value="foobar2")


def set_simple_config_collection_disabled_view():
    yield ConfigVariable(name="hidden_config_var_2", default_value="")


def set_simple_config_collection_with_callback():
    def callback():
        raise TTestConfigException(
            "Change callback dhcnfg34dlg06kdg successfully called."
        )

    yield ConfigVariable(
        name="var_with_callback_ghvnfjd5768gdfkwg0hm2",
        default_value="",
        on_change=callback,
    )