# -*- coding: utf-8 -*-
"""This module is needed for the installation of the package."""

from setuptools.command.install import install
from setuptools.command.develop import develop
from setuptools.command.build_ext import build_ext

import sys
import subprocess
import os

from wheel.bdist_wheel import bdist_wheel
from numpy.distutils.core import setup
from numpy.distutils.core import Extension

import pkg_resources
import numpy as np

version = {}
with open("smuthi/version.py") as fp:
    exec(fp.read(), version)
__version__ = version['__version__']


def get_numpy_version():
    import numpy as np
    return np.__version__


class PrepareCommand(develop):
    def run(self):
        prepare_nfmds()
        

class CustomDevelopCommand(develop):
    def run(self):
        print("**********"
              +"\nrunning develop with python " + sys.version 
              + "and numpy " + get_numpy_version() 
              + "\n**********")
        prepare_nfmds()
        develop.run(self)


class CustomInstallCommand(install):
    def run(self):
        print("**********"
              +"\nrunning install with python " + sys.version 
              + "and numpy " + get_numpy_version() 
              + "\n**********")        
        prepare_nfmds()
        install.run(self)


class CustomBuildExtCommand(build_ext):
    def run(self):
        print("**********"
              +"\nrunning build_ext with python " + sys.version 
              + "and numpy " + get_numpy_version() 
              + "\n**********")    
        build_ext.run(self)


class CustomBdistWheelCommand(bdist_wheel):
    def run(self):
        print("**********"
              +"\nrunning bdist_wheel with python " + sys.version 
              + "and numpy " + get_numpy_version() 
              + "\n**********")    
        if sys.platform.startswith('win'):
            # Skip F2Py. Before "python setup.py bdist_wheel", you need to call in advance:
            # python setup.py prepare
            # python setup.py build_ext --inplace --compiler=mingw32 --fcompiler=gnu95 -f
            self.distribution.ext_modules = []
        bdist_wheel.run(self)


def prepare_nfmds():
    """If Windows: Call encoding converter to get Fortran sources with valid encoding"""
    if sys.platform.startswith('win'):
        currdir = os.getcwd()
        nfmds_sources_dirname = pkg_resources.resource_filename('smuthi.linearsystem.tmatrix.nfmds', 'NFM-DS')
        os.chdir(nfmds_sources_dirname + '/TMATSOURCES')
        with open("encoding_converter.py") as fp:
            exec(fp.read(), version)
        os.chdir(currdir)


def read(fname):
    return open(os.path.join(os.path.dirname(__file__), fname)).read()


def get_requirements():
    """Return a list of requirements, depending on the operating system."""
    requirements = ['numpy>=1.19.3',
                    'argparse',
                    'imageio',
                    'matplotlib',
                    'mpmath',
                    'numba',
                    'pyyaml',
                    'scipy',
                    'sympy',
                    'tqdm',
                    'h5py',
                    'pycparser',
                    'psutil']
    
    if sys.platform.startswith('win'):
        # this package offers windows binaries:
        requirements.append('pywigxjpf-win')
    else:
        requirements.append('pywigxjpf')
        
    return requirements


def get_extensions(static=True):
    """Depending on the platform, pick suitable Extension object. This is important such that if
    MinGW is used, the DLLs are statically linked (otherwise the user cannot use the binary if he 
    doesn't have MinGW on his computer, too)."""    
    if os.environ.get('READTHEDOCS'):
        return []    
    f2py_options = ['only:', 'tlay','taxsym','tnonaxsym', ':']
    static_link_args = []    
    if sys.platform.startswith('win'):
        if static:
            static_link_args = ["-static", "-static-libgfortran", "-static-libgcc"]            
        nfmds_path = 'smuthi/linearsystem/tmatrix/nfmds/NFM-DS/TMATSOURCES/win/TAXSYM_SMUTHI.f90'
    else:
        nfmds_path = 'smuthi/linearsystem/tmatrix/nfmds/NFM-DS/TMATSOURCES/TAXSYM_SMUTHI.f90'    
    extensions = [Extension('smuthi.linearsystem.tmatrix.nfmds.nfmds', [nfmds_path],
                            extra_link_args=static_link_args, f2py_options=f2py_options),
                  Extension("smuthi.utility.cython.cython_speedups", 
                            ["smuthi/utility/cython/cython_speedups.c"],
                            extra_compile_args=['-fopenmp'],
                            extra_link_args=static_link_args+['-fopenmp'],
                            include_dirs=[np.get_include()])]    
    return extensions

setup(
    name="SMUTHI",
    version=__version__,
    author="Amos Egel",
    author_email="amos.egel@gmail.com",
    url='https://gitlab.com/AmosEgel/smuthi',
    description="Light scattering by multiple particles in thin-film systems",
    long_description=read('README.rst'),
    packages=['smuthi',
              'smuthi.fields',
              'smuthi.linearsystem',
              'smuthi.linearsystem.tmatrix',
              'smuthi.linearsystem.tmatrix.nfmds',
              'smuthi.linearsystem.particlecoupling',
              'smuthi.postprocessing',
              'smuthi.periodicboundaries',
              'smuthi.utility'],
    ext_modules=get_extensions(True),
    cmdclass={'prepare': PrepareCommand,
              'compile': build_ext,
              'install': CustomInstallCommand,
              'develop': CustomDevelopCommand,
              'bdist_wheel': CustomBdistWheelCommand},
    package_data={'smuthi.linearsystem.tmatrix.nfmds': ['NFM-DS/*.txt', 'NFM-DS/TMATSOURCES/*.f90', 'NFM-DS/TMATFILES/*',
                                                        'NFM-DS/INPUTFILES/*.dat', 'NFM-DS/OUTPUTFILES/*','nfmds*'],
                  },
    include_package_data=True,                  
    install_requires=get_requirements(),
    extras_require={'cuda':  ['PyCuda']},
    license='MIT',
)