# Available at setup time due to pyproject.toml
import multiprocessing
import os
import subprocess
import sys
from pathlib import Path

from setuptools import Extension, setup
from setuptools.command.build_ext import build_ext
from setuptools_scm import get_version

__version__ = get_version()

# A CMakeExtension needs a sourcedir instead of a file list.
# The name must be the _single_ output extension from the CMake build.
# If you need multiple extensions, see scikit-build.
class CMakeExtension(Extension):
    def __init__(self, name: str, sourcedir: str = "") -> None:
        super().__init__(name, sources=[])
        self.sourcedir = os.fspath(Path(sourcedir).resolve())


class CMakeBuild(build_ext):
    def build_extension(self, ext: CMakeExtension) -> None:
        # Must be in this form due to bug in .resolve() only fixed in Python 3.10+
        ext_fullpath = Path.cwd() / self.get_ext_fullpath(ext.name)
        extdir = ext_fullpath.parent.resolve()

        # Using this requires trailing slash for auto-detection & inclusion of
        # auxiliary "native" libs

        debug = int(os.environ.get("DEBUG", 0)) if self.debug is None else self.debug
        cfg = "Debug" if debug else "Release"

        # Set Python_EXECUTABLE instead if you use PYBIND11_FINDPYTHON
        # EXAMPLE_VERSION_INFO shows you how to pass a value into the C++ code
        # from Python.
        cmake_args = [
            "-GUnix Makefiles",
            f"-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={extdir}{os.sep}",
            f"-DPYTHON_EXECUTABLE={sys.executable}",
            f"-DCMAKE_BUILD_TYPE={cfg}",  # not used on MSVC, but no harm
        ]
        build_args = []
        # Adding CMake arguments set as environment variable
        # (needed e.g. to build for ARM OSx on conda-forge)
        if "CMAKE_ARGS" in os.environ:
            cmake_args += [item for item in os.environ["CMAKE_ARGS"].split(" ") if item]

        build_args += [f"-j{multiprocessing.cpu_count()}"]

        build_temp = Path(self.build_temp) / ext.name
        if not build_temp.exists():
            build_temp.mkdir(parents=True)

        subprocess.run(
            ["cmake", ext.sourcedir, *cmake_args], cwd=build_temp, check=True
        )
        subprocess.run(
            ["make", *build_args], cwd=build_temp, check=True
        )



# The main interface is through Pybind11Extension.
# * You can add cxx_std=11/14/17, and then build_ext can be removed.
# * You can set include_pybind11=false to add the include directory yourself,
#   say from a submodule.

setup(
    name="Adafruit-Blinka-Raspberry-Pi5-Piomatter",
    version=__version__,
    url="https://github.com/adafruit/Adafruit_Blinka_Raspberry_Pi5_Piomatter",
    description="HUB75 matrix driver for Raspberry Pi 5 using PIO",
    long_description="A pio-based driver",
    ext_modules=[CMakeExtension("adafruit_blinka_raspberry_pi5_piomatter._piomatter")],
    cmdclass={"build_ext": CMakeBuild},
    zip_safe=False,
    python_requires=">=3.11",
    packages=['adafruit_blinka_raspberry_pi5_piomatter'],
    package_dir={'adafruit_blinka_raspberry_pi5_piomatter': 'src/adafruit_blinka_raspberry_pi5_piomatter'},
    extras_require={
        'docs': ["sphinx", "sphinx-rtd-theme", "sphinxcontrib-jquery"],
    },
)