# Copyright (c) OpenMMLab. All rights reserved.

import os

import os.path as osp

import shutil

import sys

import warnings

from setuptools import find_packages, setup

def readme():

    with open('README.md', encoding='utf-8') as f:

        content = f.read()

    return content

version_file = 'mmaction/version.py'

def get_version():

    with open(version_file, 'r') as f:

        exec(compile(f.read(), version_file, 'exec'))

    return locals()['__version__']

def parse_requirements(fname='requirements.txt', with_version=True):

    """Parse the package dependencies listed in a requirements file but strips

    specific versioning information.

    Args:

        fname (str): path to requirements 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())"

    """

    import re

    import sys

    from os.path import exists

    require_fpath = fname

    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 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())

    return packages

def add_mim_extension():

    """Add extra files that are required to support MIM into the package.

    These files will be added by creating a symlink to the originals if the

    package is installed in `editable` mode (e.g. pip install -e .), or by

    copying from the originals otherwise.

    """

    # parse installment mode

    if 'develop' in sys.argv:

        # installed by `pip install -e .`

        mode = 'symlink'

    elif 'sdist' in sys.argv or 'bdist_wheel' in sys.argv:

        # installed by `pip install .`

        # or create source distribution by `python setup.py sdist`

        mode = 'copy'

    else:

        return

    filenames = ['tools', 'configs', 'model-index.yml']

    repo_path = osp.dirname(__file__)

    mim_path = osp.join(repo_path, 'mmaction', '.mim')

    os.makedirs(mim_path, exist_ok=True)

    for filename in filenames:

        if osp.exists(filename):

            src_path = osp.join(repo_path, filename)

            tar_path = osp.join(mim_path, filename)

            if osp.isfile(tar_path) or osp.islink(tar_path):

                os.remove(tar_path)

            elif osp.isdir(tar_path):

                shutil.rmtree(tar_path)

            if mode == 'symlink':

                src_relpath = osp.relpath(src_path, osp.dirname(tar_path))

                try:

                    os.symlink(src_relpath, tar_path)

                except OSError:

                    # Creating a symbolic link on windows may raise an

                    # `OSError: [WinError 1314]` due to privilege. If

                    # the error happens, the src file will be copied

                    mode = 'copy'

                    warnings.warn(

                        f'Failed to create a symbolic link for {src_relpath}, '

                        f'and it will be copied to {tar_path}')

                else:

                    continue

            elif mode == 'copy':

                if osp.isfile(src_path):

                    shutil.copyfile(src_path, tar_path)

                elif osp.isdir(src_path):

                    shutil.copytree(src_path, tar_path)

                else:

                    warnings.warn(f'Cannot copy file {src_path}.')

            else:

                raise ValueError(f'Invalid mode {mode}')

if __name__ == '__main__':

    add_mim_extension()

    setup(

        name='mmaction2',

        version=get_version(),

        description='OpenMMLab Video Understanding Toolbox and Benchmark',

        long_description=readme(),

        long_description_content_type='text/markdown',

        author='MMAction2 Contributors',

        author_email='openmmlab@gmail.com',

        maintainer='MMAction2 Contributors',

        maintainer_email='openmmlab@gmail.com',

        packages=find_packages(exclude=('configs', 'tools', 'demo')),

        keywords='computer vision, video understanding',

        include_package_data=True,

        classifiers=[

            'Development Status :: 4 - Beta',

            'License :: OSI Approved :: Apache Software License',

            'Operating System :: OS Independent',

            'Programming Language :: Python :: 3',

            'Programming Language :: Python :: 3.6',

            'Programming Language :: Python :: 3.7',

            'Programming Language :: Python :: 3.8',

            'Programming Language :: Python :: 3.9',

        ],

        url='https://github.com/open-mmlab/mmaction2',

        license='Apache License 2.0',

        install_requires=parse_requirements('requirements/runtime.txt'),

        extras_require={

            'all': parse_requirements('requirements.txt'),

            'tests': parse_requirements('requirements/tests.txt'),

            'build': parse_requirements('requirements/build.txt'),

            'optional': parse_requirements('requirements/optional.txt'),

        },

        zip_safe=False)