import os

from traitlets import List
from traitlets import Unicode

from jupyter_server.base.handlers import JupyterHandler
from jupyter_server.extension.application import ExtensionApp
from jupyter_server.extension.application import ExtensionAppJinjaMixin
from jupyter_server.extension.handler import ExtensionHandlerJinjaMixin
from jupyter_server.extension.handler import ExtensionHandlerMixin

STATIC_PATH = os.path.join(os.path.dirname(__file__), "static")

# Function that makes these extensions discoverable
# by the test functions.
def _jupyter_server_extension_points():
    return [{"module": __name__, "app": MockExtensionApp}]


class MockExtensionHandler(ExtensionHandlerMixin, JupyterHandler):
    def get(self):
        self.finish(self.config.mock_trait)


class MockExtensionTemplateHandler(
    ExtensionHandlerJinjaMixin, ExtensionHandlerMixin, JupyterHandler
):
    def get(self):
        self.write(self.render_template("index.html"))


class MockExtensionApp(ExtensionAppJinjaMixin, ExtensionApp):

    name = "mockextension"
    template_paths = List().tag(config=True)
    static_paths = [STATIC_PATH]
    mock_trait = Unicode("mock trait", config=True)
    loaded = False

    serverapp_config = {
        "jpserver_extensions": {"jupyter_server.tests.extension.mockextensions.mock1": True}
    }

    @staticmethod
    def get_extension_package():
        return "jupyter_server.tests.extension.mockextensions"

    def initialize_handlers(self):
        self.handlers.append(("/mock", MockExtensionHandler))
        self.handlers.append(("/mock_template", MockExtensionTemplateHandler))
        self.loaded = True


if __name__ == "__main__":
    MockExtensionApp.launch_instance()