import os
import re
import sys
# import sysconfig
import platform
import subprocess

from distutils.version import LooseVersion
from setuptools import setup, Extension, find_packages
from setuptools.command.build_ext import build_ext


class CMakeExtension(Extension):
    def __init__(self, name, sourcedir=""):
        Extension.__init__(self, name, sources=[])
        self.sourcedir = os.path.abspath(sourcedir)


class CMakeBuild(build_ext):
    def run(self):
        if platform.system() == "Darwin":
            self.build_temp = self.build_temp.replace("build", "build.nosync")

        try:
            out = subprocess.check_output(["cmake", "--version"])
        except OSError:
            raise RuntimeError(
                "CMake must be installed to build the following extensions: , ".join(e.name for e in self.extensions))

        # self.debug = True

        cmake_version = LooseVersion(
            re.search(r"version\s*([\d.]+)", out.decode()).group(1))
        if cmake_version < "3.1.0":
            raise RuntimeError("CMake >= 3.1.0 is required")

        for ext in self.extensions:
            self.build_extension(ext)

    def build_extension(self, ext):
        extdir = os.path.join(os.path.abspath(os.path.dirname(
            self.get_ext_fullpath(ext.name))), "rigidipc")

        cmake_args = ["-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + extdir,
                      "-DPYTHON_EXECUTABLE=" + sys.executable,
                      "-DRIGID_IPC_WITH_UNIT_TESTS=OFF",
                      "-DRIGID_IPC_WITH_CODE_COVERAGE=OFF",
                      "-DRIGID_IPC_WITH_DERIVATIVE_CHECK=OFF",
                      "-DRIGID_IPC_WITH_PROFILING=OFF",
                      "-DRIGID_IPC_WITH_COMPARISONS=OFF",
                      "-DRIGID_IPC_WITH_SIMD=OFF",
                      "-DRIGID_IPC_WITH_OPENGL=OFF",
                      "-DRIGID_IPC_WITH_TOOLS=OFF",
                      "-DRIGID_IPC_WITH_PYTHON=ON"]

        cfg = "Debug" if self.debug else "Release"
        build_args = ["--config", cfg]
        cmake_args += ["-DCMAKE_BUILD_TYPE=" + cfg]

        if platform.system() == "Windows":
            cmake_args += [
                "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}".format(cfg.upper(), extdir)]
            if os.environ.get("CMAKE_GENERATOR") != "NMake Makefiles":
                if sys.maxsize > 2**32:
                    cmake_args += ["-A", "x64"]
                # build_args += ["--", "/m"]
        else:
            build_args += ["--", "-j2"]

        env = os.environ.copy()
        env["CXXFLAGS"] = '{} -DVERSION_INFO=\\"{}\\"'.format(
            env.get("CXXFLAGS", ""), self.distribution.get_version())

        if not os.path.exists(self.build_temp):
            os.makedirs(self.build_temp)
        subprocess.check_call(["cmake", ext.sourcedir] +
                              cmake_args, cwd=self.build_temp, env=env)

        subprocess.check_call(["cmake", "--build", "."] +
                              build_args, cwd=self.build_temp)

        print()  # Add an empty line for cleaner output


with open("README.md", "r") as fh:
    long_description = fh.read()


setup(
    name="rigidipc",
    version="0.0.1",
    author="Zachary Ferguson",
    author_email="",
    description="Rigid IPC Python Bindings",
    long_description=long_description,
    long_description_content_type="text/markdown",
    url="",
    ext_modules=[CMakeExtension("rigidipc")],
    cmdclass=dict(build_ext=CMakeBuild),
    packages=find_packages(),
    classifiers=[
        "Programming Language :: Python :: 3",
        "License :: OSI Approved :: MIT License"
    ]
)