from pathlib import Path

import pytest
from git import Repo

from .utils import TEST_MODULE_NAME


@pytest.fixture
def wrapper(tmpdir, request):
    """
    Sets up a wrapper with the minimal necessary configuration in order to build a module

    Note that a number of necessary variables are expected to be present in the environment
    """
    try:
        params = request.param
    except AttributeError:
        params = {}

    wrapper_dir = Path(tmpdir / "wrapper")
    TEST_MODULE_PATH = (
        TEST_MODULE_NAME
        if "E3_MODULE_SRC_PATH" not in params
        else params["E3_MODULE_SRC_PATH"]
    )
    test_dir = wrapper_dir / TEST_MODULE_PATH
    test_dir.mkdir(parents=True)

    config_file = """
TOP:=$(CURDIR)

include $(REQUIRE_CONFIG)/CONFIG
include $(REQUIRE_CONFIG)/RULES_SITEMODS
"""

    module_makefile = """
where_am_I := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
include $(E3_REQUIRE_TOOLS)/driver.makefile

TEMPLATES += {templates}
SOURCES += {sources}
DBDS += {dbds}
HEADERS += {headers}
"""

    # TODO: This should not be necessary, but it is for patching.
    Repo.init(wrapper_dir)
    with open(wrapper_dir / "Makefile", "w") as f:
        f.write(config_file)

    make_vars = {"templates": "", "sources": "", "dbds": "", "headers": ""}
    make_vars.update(**params)
    with open(wrapper_dir / f"{TEST_MODULE_NAME}.Makefile", "w") as f:
        f.write(module_makefile.format(**make_vars))

    with open(wrapper_dir / TEST_MODULE_PATH / "test.dbd", "w") as f:
        pass
    yield wrapper_dir