from __future__ import absolute_import
# from setuptools import setup
import os
import sys
import subprocess

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)
        if "--backend_hip" in sys.argv:
            self.backend = "HIP"
            sys.argv.remove("--backend_hip")
        elif "--backend_ocl" in sys.argv:
            self.backend = "OCL"
            sys.argv.remove("--backend_ocl")


class CMakeBuild(build_ext):
    def run(self):
        try:
            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))

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

    def build_extension(self, ext):
        extdir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))
        if ext.backend == "HIP" :
            cmake_args = ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=' + extdir,
                      '-DPYTHON_EXECUTABLE=' + sys.executable, '-DGPU_SUPPORT=ON', '-DBACKEND=HIP']
        else:
            cmake_args = ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=' + extdir,
                      '-DPYTHON_EXECUTABLE=' + sys.executable, '-DGPU_SUPPORT=ON', '-DBACKEND=OPENCL']

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

        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)

setup(name='amd-rali',
      description='AMD RALI',
      url='https://github.com/GPUOpen-ProfessionalCompute-Libraries/MIVisionX/tree/master/rali',
      version='1.1.0',
      author='AMD',
      license='Apache License 2.0',
      packages=find_packages(),
      include_package_data=True,
      ext_modules=[CMakeExtension('rali_pybind')],
      cmdclass=dict(build_ext=CMakeBuild),
      zip_safe=False,
     )