import importlib.metadata
import importlib.resources
import os
from unittest.mock import patch

import tornado.template
import tornado_openapi3.testing
import yaml

import tutor
import tutor.database
import tutor.server

template_path = importlib.resources.files(tutor) / "templates"
template_loader = tornado.template.Loader(str(template_path))
openapi_spec_dict = yaml.safe_load(
    template_loader.load("openapi.yaml").generate(
        version=importlib.metadata.version("tutor")
    )
)
del openapi_spec_dict["servers"]
openapi_spec = None


class ServerTestCase(tornado_openapi3.testing.AsyncOpenAPITestCase):
    @property
    def spec_dict(self):
        global openapi_spec_dict
        return openapi_spec_dict

    @property
    def spec(self):
        global openapi_spec
        if not openapi_spec:
            openapi_spec = super().spec
        return openapi_spec

    def get_app(self):
        return tutor.server.Application(
            database=os.environ.get("TUTOR_DATABASE"),
        )


class DocumentationTestCase(ServerTestCase):
    def test_api_root(self):
        self.fetch("/api")

    def test_openapi_yaml(self):
        self.fetch("/api/openapi.yaml")


class APITestCase(ServerTestCase):
    def test_collection_stats(self):
        self.fetch("/api/collection")