import importlib
import sys
from unittest.mock import patch

import pytest

import delta_barth.constants
from delta_barth import _env


@patch("delta_barth._env.PY_RUNTIME_FOLDER", "test123456")
def test_prepare_env_NoRuntimeFolder(tmp_path):
    ret = _env.prepare_env(tmp_path)
    assert ret is None


@patch("delta_barth._env.PY_RUNTIME_FOLDER", "base")
def test_prepare_env_FailNoInterpreter(tmp_path_factory):
    mocked_lib_pth = tmp_path_factory.mktemp("path") / "to/base/folder/lib/"
    mocked_lib_pth.mkdir(parents=True, exist_ok=True)
    with pytest.raises(FileNotFoundError):
        _ = _env.prepare_env(mocked_lib_pth)


@patch("delta_barth._env.PY_RUNTIME_FOLDER", "base")
def test_prepare_env_Success(tmp_path_factory):
    mocked_lib_pth = tmp_path_factory.mktemp("path") / "to/base/folder/lib/"
    mocked_lib_pth.mkdir(parents=True, exist_ok=True)
    rt_path = mocked_lib_pth.parents[1]
    mocked_interpreter = rt_path / "python.exe"
    mocked_interpreter.touch()
    assert mocked_interpreter.exists()
    ret = _env.prepare_env(mocked_lib_pth)
    assert ret == rt_path
    # sys attributes
    executable = getattr(sys, "executable")
    assert executable == str(mocked_interpreter)
    base_executable = getattr(sys, "_base_executable")
    assert base_executable == str(mocked_interpreter)

    class MockPath:
        def __init__(self, *args, **kwargs):
            self.parent = mocked_lib_pth

    with patch("pathlib.Path", MockPath):
        (mocked_lib_pth / "_dummy_data").mkdir(exist_ok=True)
        importlib.reload(delta_barth.constants)
        assert delta_barth.constants.DEPLOYMENT_STATUS
        assert delta_barth.constants.RUNTIME_PATH == rt_path