#wget -O cmake.py https://raw.githubusercontent.com/pybind/cmake_example/master/setup.py

import os
import re
import sys
import platform
import subprocess

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


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


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)
##        dirs = []
##        for ext in self.extensions:
##            _dir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))
##            if (_dir not in dirs):
##                self.build_extension(ext)
##                dirs.append(_dir)
    def initialize_options(self):
        super().initialize_options()
        self.debug = True
        self.inplace = 1
#WINDOWS setuptools easy_install workaround
    def copy_libraries_to_source(self,ext):
        #super().copy_extensions_to_source(self)
        if os.name == 'nt':
            from stopeight.util.parser import find_files
            for library in ext.libraries:
                dll_file = find_files(self.build_temp,suffix=str(library)+'.dll')
                if len(dll_file)==1:
                    file_origin=dll_file[0]
                    file_destination=os.path.join(ext.sourcedir,'stopeight',str(library)+'.dll')
                    print("COPYING: setuptools Windows collecting dll: "+str(file_origin))
                    print("COPYING: setuptools Windows installing dll to: "+str(file_destination))
                    from shutil import copyfile
                    copyfile(file_origin,file_destination)

    def build_extension(self, ext):
        extdir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))
        # required for auto-detection of auxiliary "native" libs
        if not extdir.endswith(os.path.sep):
            extdir += os.path.sep

        cmake_args = ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=' + extdir,
                      '-DPYTHON_EXECUTABLE=' + sys.executable]

        cfg = 'Debug' if self.debug else 'Release'
        print("INFO: cmake --config build arg is "+cfg)
        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)
        print("INPLACE option after build is "+str(self.inplace))
        #if self.inplace:
        self.copy_libraries_to_source(ext)
