import io
import os
import subprocess

from setuptools import setup, find_packages


# Utility function to read the README file.
# Used for the long_description.  It's nice, because now 1) we have a top level
# README file and 2) it's easier to type in the README file than to put a raw
# string in below ...
def read(filename):
    with io.open(os.path.join(os.path.dirname(__file__), filename)) as f:
        return f.read()


# Utility function to determine version using git in a PEP-440 compatible way, fallback to version.txt for releases
def determine_version():
    dir_path = os.path.dirname(os.path.realpath(__file__))
    ver_file = os.path.join(dir_path, "version.txt")
    version = "0.0.0"
    if os.path.exists(ver_file):
        version = read(ver_file)
    # If this is a release file and no git is found, use version.txt
    if not os.path.isdir(os.path.join(dir_path, ".git")):
        return version
    # Derive version from git
    try:
        output = subprocess.check_output(['git', 'describe', '--tags', '--dirty'], cwd=dir_path) \
            .decode('utf-8').strip().split('-')
        if len(output) == 1:
            return output[0]
        elif len(output) == 2:
            return "{}.dev0".format(output[0])
        else:
            release = 'dev' if len(output) == 4 and output[3] == 'dirty' else ''
            return "{}.{}{}+{}".format(output[0], release, output[1], output[2])
    except subprocess.CalledProcessError:
        try:
            commit = subprocess.check_output(['git', 'rev-parse', 'HEAD']).decode('utf-8').strip()
            status = subprocess.check_output(['git', 'status', '-s']).decode('utf-8').strip()
            return "{}.dev0+{}".format(version, commit) if len(status) > 0 else "{}+{}".format(version, commit)
        except subprocess.CalledProcessError:
            # finding the git version has utterly failed, use version.txt
            return version


extra_requirements = {
    "dns": ["dnspython"],
    "yaml": ["PyYAML"],
    "idna": ["idna"],
    "ocsp-must-staple": ["cryptography>=2.1"],
    "ocsp-validation": ["cryptography>=2.4"],
    "ed25519": ["cryptography>=2.6"],
}

if __name__ == "__main__":
    setup(
        name="acertmgr",
        version=determine_version(),
        author="Markus Hauschild",
        author_email="moepman@binary-kitchen.de",
        description="An automated certificate manager using ACME/letsencrypt",
        license="ISC",
        keywords="acme letsencrypt",
        url="https://github.com/moepman/acertmgr",
        packages=find_packages(),
        long_description=read('README.md'),
        long_description_content_type="text/markdown",
        classifiers=[
            "Development Status :: 5 - Production/Stable",
            "Programming Language :: Python",
            "Environment :: Console",
            "Topic :: Security :: Cryptography",
            "License :: OSI Approved :: ISC License (ISCL)",
        ],
        install_requires=[
            "cryptography>=0.6",
        ],
        extras_require=extra_requirements,
        entry_points={
            'console_scripts': [
                'acertmgr=acertmgr:main',
            ],
        },
        data_files=[('readme', ['README.md'])]
    )