import typing as t

import click.testing

from tests.helpers import TestContext, temporary_root
from tutor.commands.cli import cli


class TestCommandMixin:
    """
    Run CLI tests in an isolated test root.
    """

    @staticmethod
    def invoke(args: t.List[str]) -> click.testing.Result:
        with temporary_root() as root:
            return TestCommandMixin.invoke_in_root(root, args)

    @staticmethod
    def invoke_in_root(
        root: str, args: t.List[str], catch_exceptions: bool = True
    ) -> click.testing.Result:
        """
        Use this method for commands that all need to run in the same root:

            with temporary_root() as root:
                result1 = self.invoke_in_root(root, ...)
                result2 = self.invoke_in_root(root, ...)
        """
        runner = click.testing.CliRunner(
            env={
                "TUTOR_ROOT": root,
                "TUTOR_IGNORE_ENTRYPOINT_PLUGINS": "1",
                "TUTOR_IGNORE_DICT_PLUGINS": "1",
            },
            mix_stderr=False,
        )
        return runner.invoke(
            cli, args, obj=TestContext(root), catch_exceptions=catch_exceptions
        )