import codecs
import os
import os.path
import platform
import re
import shutil
import subprocess
import sys
from distutils.command.build_py import build_py as _build_py
from distutils.version import LooseVersion

from setuptools import Extension, find_packages, setup
from setuptools.command.build_ext import build_ext
from setuptools.command.develop import develop
from setuptools.command.install import install

use_clang = False

here = os.path.abspath(os.path.dirname(__file__))


def read(*parts):
    with codecs.open(os.path.join(here, *parts), "r") as fp:
        return fp.read()


def find_version(*file_paths):
    version_file = read(*file_paths)
    version_match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", version_file, re.M)
    if version_match:
        return version_match.group(1)
    raise RuntimeError("Unable to find version string.")


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):
        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)
            )

        if platform.system() == "Windows":
            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 on Windows")

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

        if platform.system() == "Windows":
            mesh_renderer_dir = os.path.join(here, "igibson", "render", "mesh_renderer")
            release_dir = os.path.join(mesh_renderer_dir, "Release")
            for f in os.listdir(release_dir):
                shutil.copy(os.path.join(release_dir, f), mesh_renderer_dir)

            shutil.rmtree(release_dir)
            vr_dll = os.path.join(here, "igibson", "render", "openvr", "bin", "win64", "openvr_api.dll")
            sr_ani_dir = os.path.join(here, "igibson", "render", "sranipal", "bin")
            shutil.copy(vr_dll, mesh_renderer_dir)

            for f in os.listdir(sr_ani_dir):
                if f.endswith("dll"):
                    shutil.copy(os.path.join(sr_ani_dir, f), mesh_renderer_dir)

    def build_extension(self, ext):
        extdir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))
        cmake_args = [
            "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + os.path.join(extdir, "igibson", "render", "mesh_renderer"),
            "-DCMAKE_RUNTIME_OUTPUT_DIRECTORY=" + os.path.join(extdir, "igibson", "render", "mesh_renderer", "build"),
            "-DPYTHON_EXECUTABLE=" + sys.executable,
        ]

        if use_clang:
            cmake_args += ["-DCMAKE_C_COMPILER=/usr/bin/clang", "-DCMAKE_CXX_COMPILER=/usr/bin/clang++"]

        if platform.system() == "Darwin":
            cmake_args += ["-DMAC_PLATFORM=TRUE"]
        else:
            cmake_args += ["-DMAC_PLATFORM=FALSE"]

        if os.getenv("USE_VR"):
            cmake_args += ["-DUSE_VR=TRUE"]

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

        if platform.system() == "Windows":
            cmake_args += ["-DCMAKE_LIBRARY_OUTPUT_DIRECTORY{}={}".format(cfg.upper(), extdir)]
            if sys.maxsize > 2 ** 32:
                cmake_args += ["-A", "x64"]
            build_args += ["--", "/m"]
        else:
            cmake_args += ["-DCMAKE_BUILD_TYPE=" + cfg]
            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)


'''
class PostInstallCommand(install):
        """Post-installation for installation mode."""
        def run(self):
                print('post installation')
                check_call("bash realenv/envs/build.sh".split())
                install.run(self)
'''

if sys.version_info.major == 3:
    with open("README.md", "r", encoding="utf-8") as fh:
        long_description = fh.read()
else:
    # for python2
    with open("README.md", "r") as fh:
        long_description = fh.read()

setup(
    name="igibson",
    version="2.1.0",
    author="Stanford University",
    long_description_content_type="text/markdown",
    long_description=long_description,
    url="https://github.com/StanfordVL/iGibson",
    zip_safe=False,
    packages=find_packages(),
    install_requires=[
        "gym>=0.12",
        "numpy>=1.16.0",
        "scipy>=1.4",
        "pybullet-svl>=3.1.6.4",
        "transforms3d>=0.3.1",
        "opencv-python>=3.4.8",
        "Pillow>=5.4.0",
        "networkx>=2.0",
        "PyYAML",
        "tqdm",
        "freetype-py",
        "matplotlib",
        "cloudpickle",
        "aenum",
        "GPUtil",
        "ipython",
        "future",
        "trimesh",
        "h5py",
        "gitpython",
        "py360convert",
        "six",
        "pandas",
        "packaging",
        "bddl~=1.0.1",
        "urllib3>=1.20",
        "progressbar>=2.5",
        "packaging",
    ],
    ext_modules=[CMakeExtension("MeshRendererContext", sourcedir="igibson/render")],
    cmdclass=dict(build_ext=CMakeBuild),
    tests_require=[],
    package_data={"": ["igibson/global_config.yaml", "igibson/render/mesh_renderer/shaders/*"]},
    include_package_data=True,
)  # yapf: disable
