import os
import re
import sys

from setuptools import find_packages, setup

pwd = os.path.dirname(__file__)
version_file = 'lmdeploy/version.py'


def readme():
    with open(os.path.join(pwd, 'README.md'), encoding='utf-8') as f:
        content = f.read()
    return content


def get_version():
    with open(os.path.join(pwd, version_file), 'r') as f:
        exec(compile(f.read(), version_file, 'exec'))
    return locals()['__version__']


def check_ext_modules():
    if os.path.exists(os.path.join(pwd, 'lmdeploy', 'lib')):
        return True
    return False


def parse_requirements(fname='requirements.txt', with_version=True):
    """Parse the package dependencies listed in a file but strips specific
    versioning information.

    Args:
        fname (str): path to the file
        with_version (bool, default=False): if True include version specs

    Returns:
        List[str]: list of requirements items

    CommandLine:
        python -c "import setup; print(setup.parse_requirements())"
    """
    require_fpath = fname

    def get_nccl_pkg():
        arg_name = '--cuda='
        arg_value = None
        for arg in sys.argv[1:]:
            if arg.startswith(arg_name):
                arg_value = arg[len(arg_name):]
                sys.argv.remove(arg)
                break

        if arg_value == '11':
            return 'nvidia-nccl-cu11'
        elif arg_value == '12':
            return 'nvidia-nccl-cu12'
        return None

    def parse_line(line):
        """Parse information from a line in a requirements text file."""
        if line.startswith('-r '):
            # Allow specifying requirements in other files
            target = line.split(' ')[1]
            for info in parse_require_file(target):
                yield info
        else:
            info = {'line': line}
            if line.startswith('-e '):
                info['package'] = line.split('#egg=')[1]
            elif '@git+' in line:
                info['package'] = line
            else:
                # Remove versioning from the package
                pat = '(' + '|'.join(['>=', '==', '>']) + ')'
                parts = re.split(pat, line, maxsplit=1)
                parts = [p.strip() for p in parts]

                info['package'] = parts[0]
                if len(parts) > 1:
                    op, rest = parts[1:]
                    if ';' in rest:
                        # Handle platform specific dependencies
                        # http://setuptools.readthedocs.io/en/latest/setuptools.html#declaring-platform-specific-dependencies
                        version, platform_deps = map(str.strip,
                                                     rest.split(';'))
                        info['platform_deps'] = platform_deps
                    else:
                        version = rest  # NOQA
                    info['version'] = (op, version)
            yield info

    def parse_require_file(fpath):
        with open(fpath, 'r') as f:
            for line in f.readlines():
                line = line.strip()
                if line and not line.startswith('#'):
                    for info in parse_line(line):
                        yield info

    def gen_packages_items():
        if os.path.exists(require_fpath):
            for info in parse_require_file(require_fpath):
                parts = [info['package']]
                if with_version and 'version' in info:
                    parts.extend(info['version'])
                if not sys.version.startswith('3.4'):
                    # apparently package_deps are broken in 3.4
                    platform_deps = info.get('platform_deps')
                    if platform_deps is not None:
                        parts.append(';' + platform_deps)
                item = ''.join(parts)
                yield item

    packages = list(gen_packages_items())
    nccl_pkg = get_nccl_pkg()
    if nccl_pkg is not None:
        packages += [nccl_pkg]
    return packages


if __name__ == '__main__':
    setup(name='lmdeploy',
          version=get_version(),
          description='A toolset for compressing, deploying and serving LLM',
          long_description=readme(),
          long_description_content_type='text/markdown',
          author='OpenMMLab',
          author_email='openmmlab@gmail.com',
          packages=find_packages(exclude=()),
          include_package_data=True,
          install_requires=parse_requirements('requirements.txt'),
          has_ext_modules=check_ext_modules,
          classifiers=[
              'Programming Language :: Python :: 3.8',
              'Programming Language :: Python :: 3.9',
              'Programming Language :: Python :: 3.10',
              'Programming Language :: Python :: 3.11',
              'Intended Audience :: Developers',
              'Intended Audience :: Education',
              'Intended Audience :: Science/Research',
          ])