import pathlib
from setuptools import setup
from setuptools.command.build_ext import build_ext
from setuptools.errors import CompileError
from setuptools.extension import Extension
from subprocess import CalledProcessError, check_call


HERE = pathlib.Path(__file__).parent
README = (HERE / "README.md").read_text()


def get_version():
    with open('go.mod') as f:
        for line in f:
            line = line.strip()
            if line.startswith('github.com/tdewolff/minify/v2'):
                return line.split()[1].split('-')[0][1:]
    raise CompileError('Version retrieval failed')


class build_ext_external(build_ext):
    """Placeholder for externally-built extension."""
    def build_extension(self, ext: Extension):
        if not all(pathlib.Path(p).exists() for p in ext.sources):
            try:
                check_call(['go', 'build', '-buildmode=c-shared', '-o', *ext.sources])
            except CalledProcessError as e:
                raise CompileError('Go compilation failed!') from e


setup(
    name="tdewolff-minify",
    version=get_version(),
    description="Go minifiers for web formats",
    long_description=README,
    long_description_content_type="text/markdown",
    url="https://github.com/tdewolff/minify",
    author="Taco de Wolff",
    author_email="tacodewolff@gmail.com",
    license="MIT",
    classifiers = [
        "Development Status :: 4 - Beta",
        "Intended Audience :: Developers",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
        "Programming Language :: JavaScript",
        "Programming Language :: Python",
        "Programming Language :: Python :: 3",
        "Programming Language :: Python :: 3 :: Only",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Programming Language :: Python :: 3.9",
        "Programming Language :: Python :: 3.10",
        "Programming Language :: Python :: 3.11",
        "Programming Language :: Python :: 3.12",
        "Topic :: Internet :: WWW/HTTP",
        "Topic :: Software Development :: Pre-processors",
        "Topic :: Text Processing :: Markup",
    ],
    ext_modules=[
        Extension("minify", ["minify.so"]),
    ],
    cmdclass={"build_ext": build_ext_external},
    packages=["minify"],
    package_dir={"": "src"},
    include_package_data=True,
    cffi_modules=["build_minify.py:ffi"],
    install_requires=["cffi>=1.0.0"],
    zip_safe=False,
)
