# Copyright (c) Alibaba, Inc. and its affiliates.
# !/usr/bin/env python
import os
import shutil
import subprocess
from setuptools import find_packages, setup


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


MAJOR = 0
MINOR = 1
PATCH = 0
SUFFIX = ''
if PATCH != '':
    SHORT_VERSION = '{}.{}.{}{}'.format(MAJOR, MINOR, PATCH, SUFFIX)
else:
    SHORT_VERSION = '{}.{}{}'.format(MAJOR, MINOR, SUFFIX)

version_file = 'easycv/version.py'


def get_git_hash():

    def _minimal_ext_cmd(cmd):
        # construct minimal environment
        env = {}
        for k in ['SYSTEMROOT', 'PATH', 'HOME']:
            v = os.environ.get(k)
            if v is not None:
                env[k] = v
        # LANGUAGE is used on win32
        env['LANGUAGE'] = 'C'
        env['LANG'] = 'C'
        env['LC_ALL'] = 'C'
        out = subprocess.Popen(
            cmd, stdout=subprocess.PIPE, env=env).communicate()[0]
        return out

    try:
        out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
        sha = out.strip().decode('ascii')
    except OSError:
        sha = 'unknown'

    return sha


def get_hash():
    assert os.path.exists('.git'), '.git directory does not exist'
    sha = get_git_hash()[:7]
    return sha


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 sys
    from os.path import exists
    import re
    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]
            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.startswith('http'):
                    print('skip http requirements %s' % line)
                    continue
                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 pack_resource():
    # pack resource such as configs and tools
    root_dir = 'package/'
    if os.path.isdir(root_dir):
        shutil.rmtree(root_dir)
    os.makedirs(root_dir)

    proj_dir = root_dir + 'easycv/'
    shutil.copytree('./easycv', proj_dir)
    shutil.copytree('./configs', proj_dir + 'configs')
    shutil.copytree('./tools', proj_dir + 'tools')
    shutil.copytree(
        './thirdparty',
        proj_dir + 'thirdparty',
        ignore=shutil.ignore_patterns('*.pyc'))
    shutil.copytree('./resource', proj_dir + 'resource')
    shutil.copytree('./requirements', 'package/requirements')
    shutil.copy('./requirements.txt', 'package/requirements.txt')
    shutil.copy('./MANIFEST.in', 'package/MANIFEST.in')
    shutil.copy('./README.md', 'package/README.md')


if __name__ == '__main__':
    # write_version_py()
    pack_resource()
    os.chdir('package')
    install_requires = parse_requirements('requirements.txt')
    setup(
        name='pai-easycv',
        version=get_version(),
        description='An all-in-one toolkit for computer vision',
        long_description=readme(),
        long_description_content_type='text/markdown',
        author='Alibaba PAI team',
        author_email='easycv@list.alibaba-inc.com',
        keywords='self-supvervised, classification, vision',
        url='https://github.com/alibaba/EasyCV.git',
        packages=find_packages(exclude=('configs', 'tools', 'demo')),
        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 :: 3.5',
            'Programming Language :: Python :: 3.6',
            'Programming Language :: Python :: 3.7',
        ],
        license='Apache License 2.0',
        tests_require=parse_requirements('requirements/tests.txt'),
        install_requires=install_requires,
        zip_safe=False)