"""
    utils for distutils setup
    ~~~~~~~~~~~~~~~~~~~~~~~~~

    Get README.creole as ReStructuredText on-the-fly for setup.long_description

    More information:
        https://code.google.com/p/python-creole/wiki/UseInSetup

    usage in setup.py e.g.:
    ---------------------------------------------------------------------------
    #!/usr/bin/env python
    # coding: utf-8

    import os
    import sys
    from setuptools import setup, find_packages

    PACKAGE_ROOT = os.path.dirname(os.path.abspath(__file__))

    try:
        from creole.setup_utils import get_long_description
    except ImportError:
        if 'register' in sys.argv or 'sdist' in sys.argv or '--long-description' in sys.argv:
            etype, evalue, etb = sys.exc_info()
            evalue = etype('%s - Please install python-creole >= v0.8 -  e.g.: pip install python-creole' % evalue)
            raise etype, evalue, etb
        long_description = None
    else:
        long_description = get_long_description(PACKAGE_ROOT)

    setup(
        ...
        long_description = long_description,
        ...
    )
    ---------------------------------------------------------------------------

    :copyleft: 2011-2020 by the python-creole team, see AUTHORS for more details.
    :license: GNU GPL v3 or above, see LICENSE for more details.
"""

import codecs
import datetime
import os
import shutil
import subprocess
import sys
import warnings
from pathlib import Path

from creole import __version__, creole2html, html2rest
from creole.shared.unknown_tags import raise_unknown_node, transparent_unknown_nodes

RAISE_ERRORS_ARGS = (
    'check', 'register', 'sdist', 'bdist', 'upload',
    '--long-description', '--restructuredtext',
)


def should_raise_errors():
    """
    Raise only errors, if one of RAISE_ERRORS_ARGS is in sys.argv
    or if no argument presents.
    """
    if len(sys.argv) == 1:
        return True

    for arg in RAISE_ERRORS_ARGS:
        if arg in sys.argv:
            return True
    return False


def get_long_description(package_root, filename='README.creole', raise_errors=None):
    """ read README file and convert it on-the-fly to ReStructuredText. """

    warnings.warn('get_long_description() will be removed in the future', DeprecationWarning)

    if raise_errors is None:
        raise_errors = should_raise_errors()

    if raise_errors:
        sys.stderr.write('Test creole2rest and raise an error, if rendering failed...\n')
        # raise a error if a unknown node found
        unknown_emit = raise_unknown_node
    else:
        # ignore unknown nodes
        unknown_emit = transparent_unknown_nodes

    filepath = os.path.join(package_root, filename)
    long_description_origin = ''
    try:
        # Read creole README
        f = codecs.open(filepath, 'r', encoding='utf-8')
        long_description_origin = f.read().strip()
        f.close()

        # convert creole into html
        long_description_html = creole2html(long_description_origin)

        # convert html to ReSt
        long_description_rest = html2rest(
            long_description_html,
            emitter_kwargs={'unknown_emit': unknown_emit}
        )
    except Exception:
        if raise_errors:
            raise
        # Don't raise the error e.g. in ./setup install process
        evalue = sys.exc_info()[1]
        long_description_rest = f'[Error: {evalue}]\n{long_description_origin}'
    else:
        if raise_errors:
            # Test created ReSt code like PyPi does it.
            from creole.rest_tools.pypi_rest2html import pypi_rest2html
            try:
                pypi_rest2html(long_description_rest)
            except SystemExit as e:
                msg = f'Error creole2rest self test failed: rest2html() exist with status code: {e.args[0]}\n'
                sys.stderr.write(msg)
                sys.exit(msg)
            except Exception as e:
                sys.exit(f'ReSt2html error: {e}')
            else:
                if 'check' in sys.argv:
                    print('Generating creole to ReSt to html, ok.')

    return long_description_rest


def update_rst_readme(package_root, filename='README.creole'):
    """
    Generate README.rst from README.creole
    """
    assert isinstance(package_root, Path)
    assert package_root.is_dir(), f'Directory not found: {package_root}'
    creole_readme_path = Path(package_root, filename)
    assert creole_readme_path.is_file(), f'File not found: {creole_readme_path}'

    rest_readme_path = creole_readme_path.with_suffix('.rst')
    print(
        f'Generate {rest_readme_path.name} from {creole_readme_path.name}',
        end='...', flush=True
    )

    with creole_readme_path.open('r') as f:
        creole_readme = f.read().strip()

    # convert creole into html
    html_readme = creole2html(creole_readme)

    # convert html to ReSt
    rest_readme = html2rest(
        html_readme,
        emitter_kwargs={
            'unknown_emit': raise_unknown_node  # raise a error if a unknown node found
        }
    )

    with rest_readme_path.open('w') as f:
        f.write(rest_readme)
        f.write('\n\n------------\n\n')
        dt = datetime.datetime.utcnow()
        dt = dt.replace(microsecond=0)
        dt = dt.isoformat(sep=' ')
        f.write(f'``Note: this file is generated from {filename} with "python-creole" at {dt}``')

    print('done.')


def update_creole_rst_readme():
    update_rst_readme(
        package_root=Path(__file__).parent.parent,
        filename='README.creole'
    )


def verbose_check_output(*args, log=None):
    """ 'verbose' version of subprocess.check_output() """
    call_info = 'Call: %r' % ' '.join(args)
    try:
        output = subprocess.check_output(
            args, universal_newlines=True, stderr=subprocess.STDOUT
        )
    except subprocess.CalledProcessError as err:
        print('\n***ERROR:')
        print(err.output)
        if log is not None:
            log.write(err.output)
        raise
    return call_info, output


def verbose_check_call(*args):
    """ 'verbose' version of subprocess.check_call() """
    print('\tCall: %r\n' % ' '.join(args))
    subprocess.check_call(args, universal_newlines=True)


def confirm(txt):
    print(f'\n{txt}')
    if input('\nPublish anyhow? (Y/N)').lower() not in ('y', 'j'):
        print('Bye.')
        sys.exit(-1)


def poetry_publish(package_root, version, filename='README.creole', log_filename='publish.log'):
    """
    Helper to build and upload to PyPi, with prechecks and update README.rst from README.creole

    Optional arguments are passed to `poetry publish` e.g.:

        $ poetry config repositories.testpypi https://test.pypi.org/simple
        $ poetry run publish --repository=testpypi

    Build and upload to PyPi, if...
        ... __version__ doesn't contains 'dev'
        ... we are on git "master" branch
        ... git repository is 'clean' (no changed files)

    Upload with 'poetry', git tag the current version and git push --tag

    The cli arguments will be pass to 'twine'. So this is possible:
     * Display 'twine' help page...: ./setup.py publish --help
     * use testpypi................: ./setup.py publish --repository=test

    add this to poetry pyproject.toml, e.g.:

        [tool.poetry.scripts]
        publish = 'foo.bar:publish'

    based on:
    https://github.com/jedie/python-code-snippets/blob/master/CodeSnippets/setup_publish.py
    """
    update_rst_readme(package_root=package_root, filename=filename)

    for key in ('dev', 'rc'):
        if key in version:
            confirm(f'WARNING: Version contains {key!r}: v{version}\n')
            break

    print('\nCheck if we are on "master" branch:')
    call_info, output = verbose_check_output('git', 'branch', '--no-color')
    print(f'\t{call_info}')
    if '* master' in output:
        print('OK')
    else:
        confirm(f'\nNOTE: It seems you are not on "master":\n{output}')

    print('\ncheck if if git repro is clean:')
    call_info, output = verbose_check_output('git', 'status', '--porcelain')
    print(f'\t{call_info}')
    if output == '':
        print('OK')
    else:
        print('\n *** ERROR: git repro not clean:')
        print(output)
        sys.exit(-1)

    print('\nRun "poetry check":')
    call_info, output = verbose_check_output('poetry', 'check')
    if 'All set!' not in output:
        print(output)
        confirm('Check failed!')
    else:
        print('OK')

    print('\ncheck if pull is needed')
    verbose_check_call('git', 'fetch', '--all')
    call_info, output = verbose_check_output('git', 'log', 'HEAD..origin/master', '--oneline')
    print(f'\t{call_info}')
    if output == '':
        print('OK')
    else:
        print('\n *** ERROR: git repro is not up-to-date:')
        print(output)
        sys.exit(-1)
    verbose_check_call('git', 'push')

    print('\nCleanup old builds:')

    def rmtree(path):
        path = os.path.abspath(path)
        if os.path.isdir(path):
            print('\tremove tree:', path)
            shutil.rmtree(path)
    rmtree('./dist')
    rmtree('./build')

    print(f'\nSet new version to: v{version}')
    verbose_check_call('poetry', 'version', version)

    print('\nbuild but do not upload...')

    with open(log_filename, 'a') as log:
        log.write('\n')
        log.write('-' * 100)
        log.write('\n')
        call_info, output = verbose_check_output('poetry', 'build', log=log)
        print(f'\t{call_info}')
        log.write(call_info)
        log.write(output)

    print(f'Build log file is here: {log_filename!r}')

    git_tag = f'v{version}'

    print('\ncheck git tag')
    call_info, output = verbose_check_output(
        'git', 'log', 'HEAD..origin/master', '--oneline',
    )
    if git_tag in output:
        print(f'\n *** ERROR: git tag {git_tag!r} already exists!')
        print(output)
        sys.exit(-1)
    else:
        print('OK')

    print('\nUpload to PyPi via poetry:')
    args = ['poetry', 'publish'] + sys.argv[1:]
    verbose_check_call(*args)

    print('\ngit tag version')
    verbose_check_call('git', 'tag', git_tag)

    print('\ngit push tag to server')
    verbose_check_call('git', 'push', '--tags')

    sys.exit(0)


def publish_python_creole():
    """
        Publish python-creole to PyPi
        Call this via:
            $ poetry run publish
    """
    poetry_publish(
        package_root=Path(__file__).parent.parent,
        version=__version__,
    )


if __name__ == '__main__':
    update_creole_rst_readme()