import os
import setuptools
import shutil
import subprocess
from setuptools.command.build_py import build_py
from setuptools.command.develop import develop

current_dir = os.path.dirname(os.path.realpath(__file__))
jit_include_dirs = ('deep_gemm/include/deep_gemm', )
third_party_include_dirs = (
    'third-party/cutlass/include/cute',
    'third-party/cutlass/include/cutlass',
)


class PostDevelopCommand(develop):
    def run(self):
        develop.run(self)
        self.make_jit_include_symlinks()

    @staticmethod
    def make_jit_include_symlinks():
        # Make symbolic links of third-party include directories
        for d in third_party_include_dirs:
            dirname = d.split('/')[-1]
            src_dir = f'{current_dir}/{d}'
            dst_dir = f'{current_dir}/deep_gemm/include/{dirname}'
            assert os.path.exists(src_dir)
            if os.path.exists(dst_dir):
                assert os.path.islink(dst_dir)
                os.unlink(dst_dir)
            os.symlink(src_dir, dst_dir, target_is_directory=True)


class CustomBuildPy(build_py):
    def run(self):
        # First, prepare the include directories
        self.prepare_includes()

        # Then run the regular build
        build_py.run(self)

    def prepare_includes(self):
        # Create temporary build directory instead of modifying package directory
        build_include_dir = os.path.join(self.build_lib, 'deep_gemm/include')
        os.makedirs(build_include_dir, exist_ok=True)

        # Copy third-party includes to the build directory
        for d in third_party_include_dirs:
            dirname = d.split('/')[-1]
            src_dir = os.path.join(current_dir, d)
            dst_dir = os.path.join(build_include_dir, dirname)

            # Remove existing directory if it exists
            if os.path.exists(dst_dir):
                shutil.rmtree(dst_dir)

            # Copy the directory
            shutil.copytree(src_dir, dst_dir)


if __name__ == '__main__':
    # noinspection PyBroadException
    try:
        cmd = ['git', 'rev-parse', '--short', 'HEAD']
        revision = '+' + subprocess.check_output(cmd).decode('ascii').rstrip()
    except:
        revision = ''

    setuptools.setup(
        name='deep_gemm',
        version='1.0.0' + revision,
        packages=['deep_gemm', 'deep_gemm/jit', 'deep_gemm/jit_kernels'],
        package_data={
            'deep_gemm': [
                'include/deep_gemm/*',
                'include/cute/**/*',
                'include/cutlass/**/*',
            ]
        },
        cmdclass={
            'develop': PostDevelopCommand,
            'build_py': CustomBuildPy,
        },
    )