#!/usr/bin/env python3
#
# Copyright (c)  2020  Xiaomi Corporation (author: Fangjun Kuang)

import glob
import os
import re
import setuptools
import shutil
import subprocess

from setuptools.command.build_ext import build_ext

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


def cmake_extension(name, *args, **kwargs) -> setuptools.Extension:
    kwargs["language"] = "c++"
    sources = []
    return setuptools.Extension(name, sources, *args, **kwargs)


class BuildExtension(build_ext):
    def build_extension(self, ext: setuptools.extension.Extension):
        build_dir = self.build_temp
        os.makedirs(build_dir, exist_ok=True)

        os.makedirs(self.build_lib, exist_ok=True)

        ret = os.system(f"cd {build_dir}; cmake {cur_dir}; make -j _kaldifst")
        if ret != 0:
            raise Exception(
                "\nBuild kaldifst failed. Please check the error message.\n"
                "You can ask for help by creating an issue on GitHub.\n"
                "\nClick:\n    https://github.com/csukuangfj/kaldifst/issues/new\n"
            )
        lib_so = glob.glob(f"{build_dir}/lib/*.so*")
        for so in lib_so:
            print(f"Copying {so} to {self.build_lib}/")
            shutil.copy(f"{so}", f"{self.build_lib}/")

        # macos
        # also need to copy *fst*.dylib
        lib_so = glob.glob(f"{build_dir}/lib/*.dylib*")
        for so in lib_so:
            print(f"Copying {so} to {self.build_lib}/")
            shutil.copy(f"{so}", f"{self.build_lib}/")


def read_long_description():
    with open("README.md", encoding="utf8") as f:
        readme = f.read()
    return readme


def get_package_version():
    with open("CMakeLists.txt") as f:
        content = f.read()

    latest_version = re.search(r"set\(KALDIFST_VERSION (.*)\)", content).group(1)
    latest_version = latest_version.strip('"')
    return latest_version


package_name = "kaldifst"

setuptools.setup(
    name=package_name,
    version=get_package_version(),
    author="Fangjun Kuang",
    author_email="csukuangfj@gmail.com",
    package_dir={
        package_name: "kaldifst/python/kaldifst",
    },
    packages=[package_name],
    url="https://github.com/csukuangfj/kaldifst",
    long_description=read_long_description(),
    long_description_content_type="text/markdown",
    ext_modules=[cmake_extension("_kaldifst")],
    cmdclass={"build_ext": BuildExtension},
    zip_safe=False,
    classifiers=[
        "Programming Language :: C++",
        "Programming Language :: Python",
        "Topic :: Scientific/Engineering :: Artificial Intelligence",
    ],
    license="Apache licensed, as found in the LICENSE file",
)
