#!/usr/bin/env python
# -*- encoding: utf-8 -*-
"""Generate a reST file from configuration files
"""
import argparse
import logging
import os
import subprocess
import sys

import yaml
from six.moves import configparser

_logger = logging.getLogger(__name__)

__version__ = '0.2.0'
__date__ = '2016-07-15'
__updated__ = '2019-06-05'


def main(argv=None):  # IGNORE:C0111
    """Parse arguments and launch conversion
    """
    if argv is None:
        argv = sys.argv
    else:
        sys.argv.extend(argv)

    program_version = __version__
    program_build_date = str(__updated__)
    program_version_message = '%%(prog)s %s (%s)' % (
        program_version, program_build_date)
    program_shortdesc = __doc__.split("\n")[1]
    program_license = '''%s

  Created by Vincent Hatakeyama on %s.
  Copyright 2016, 2019 XCG Consulting. All rights reserved.

  Licensed under the MIT License

  Distributed on an "AS IS" basis without warranties
  or conditions of any kind, either express or implied.

USAGE
''' % (
        program_shortdesc,
        str(__date__),
    )
    # Argument parsing
    parser = argparse.ArgumentParser(
        description=program_license,
        formatter_class=argparse.RawDescriptionHelpFormatter)
    parser.add_argument(
        '-V', '--version', action='version',
        version=program_version_message)
    parser.add_argument(
        '-v', '--verbose', dest='verbose', action='count',
        help="set verbosity level [default: %(default)s]")
    parser.add_argument(
        '-d',
        '--directory',
        help="Source directory [default: %(default)s]",
        default='..',
    )
    parser.add_argument(
        '-o',
        '--output',
        help="Output file name",
    )

    nmspc = parser.parse_args()
    verbose = nmspc.verbose
    if not verbose:
        logging.basicConfig(level=logging.WARN)
    if verbose == 1:
        logging.basicConfig(level=logging.INFO)
    if verbose and verbose > 1:
        logging.basicConfig(level=logging.DEBUG)
    basedir = os.path.dirname(sys.argv[0])
    conf2rst(basedir, nmspc.directory, nmspc.output)


def conf2rst(basedir, directory, output=None):
    """
    :param basedir: directory with the odoo_versions.csv file
    :param directory: destination directory
    :param output: file to write to, else prints in stdout
    """

    # read setup.cfg
    parser = configparser.ConfigParser()
    setup_path = os.path.join(directory, 'setup.cfg')
    parser.read(setup_path)
    addon_dirs = set(
        os.path.dirname(path)
        for path in parser.get('odoo_scripts', 'modules').split())

    # pip freeze
    reqs = dict()
    for element in subprocess.check_output(['pip', 'freeze']).split():
        lib_and_version = element.decode('utf-8').split('==')
        if len(lib_and_version) == 1:  # No explicit version (no ==).
            library, version = lib_and_version[0], "N/A"
        else:
            library, version = lib_and_version
        reqs[library] = {'version': version}

    rst = {
        'python': reqs,
        'tools': {}, 'modules': {}, 'other': {}, 'group of modules': {}
    }
    # load the conf file
    # test if there is a .hgconf file
    hgconf_path = os.path.join(directory, '.hgconf')
    if os.path.exists(hgconf_path):
        _logger.debug("Found .hgconf at %s", hgconf_path)
        parser = configparser.ConfigParser()
        parser.read(hgconf_path)
        for section in parser.sections():
            layout = parser.get(section, 'layout')
            if layout == 'odoo_scripts':
                group = 'tools'
            elif any(layout == addon_dir for addon_dir in addon_dirs):
                group = 'group of modules'
            elif any(
                layout.startswith(addon_dir) for addon_dir in addon_dirs
            ):
                group = 'modules'
            else:
                group = 'other'
            rst[group][section] = {
                'version': parser.get(section, 'track'),
                'repository': parser.get(section, 'pulluri'),
            }

    # handle nest.yaml case
    confnest_path = os.path.join(directory, 'nest.yaml')
    if os.path.exists(confnest_path):
        _logger.debug("Found nest.yaml at %s", confnest_path)
        stream = open(confnest_path, 'r')
        data = yaml.safe_load(stream)
        repos = data['repos']
        for module in repos:
            layout = repos[module]['layout']
            if layout == 'odoo_scripts':
                group = 'tools'
            elif any(layout == addon_dir for addon_dir in addon_dirs):
                group = 'group of modules'
            elif any(
                layout.startswith(addon_dir) for addon_dir in addon_dirs
            ):
                group = 'modules'
            else:
                group = 'other'
            rst[group][module] = {
                'version': repos[module]['track'],
                'repository': repos[module]['pulluri'],
            }

    # output the rst
    if output:
        with open(output, 'w') as output_file:
            write_rst(output_file, rst)
    else:
        write_rst(sys.stdout, rst)


def write_rst(out, rst, headers=True):
    """Write rst to out (be it an open file or std out).

    We use anonymous links here (2 underscores) to avoid conflicts when the
    same version is shared by 2 repos (as the "link target" system would then
    be in use).
    """

    out.write("Versions\n")
    out.write("========\n\n")
    for group in ('modules', 'group of modules', 'python', 'other', 'tools'):
        if rst.get(group):
            out.write(".. list-table:: %s\n" % group)
            out.write("   :widths: 2 3\n")
            if headers:
                out.write("   :header-rows: 1\n")
            out.write("\n")
            if headers:
                out.write("   * - element\n")
                out.write("     - version\n")
            for element in rst[group].keys():
                out.write("   * - %s\n" % element)
                version = rst[group][element]['version']
                repository = rst[group][element].get('repository', '')
                if repository.startswith('ssh://hg@bitbucket.org/'):
                    text = '`%s <%s/commits/%s>`__' % (
                        version,
                        repository.replace(
                            'ssh://hg@bitbucket.org/',
                            'https://bitbucket.org/'),
                        version)
                elif repository.startswith('git@bitbucket.org:'):
                    text = '`%s <%s/commits/%s>`__' % (
                        version,
                        repository.replace(
                            'git@bitbucket.org:',
                            'https://bitbucket.org/').replace('.git', ''),
                        version)
                else:
                    text = version
                out.write("     - %s\n" % text)
            out.write("\n")


if __name__ == '__main__':
    main()