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

_logger = logging.getLogger(__name__)

__version__ = '0.1.0'
__date__ = '2016-07-15'
__updated__ = '2016-07-15'

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 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 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)
    odoo_type = parser.get('odoo_scripts', 'odoo_type', 'odoo8')
    addon_dirs = parser.get('odoo_scripts', 'addon_dirs', '').split()

    # analyse Dockerfile if any
    if 'odoo_type' != 'bzr':
        dockerfile_path = os.path.join(directory, 'Dockerfile')
        with open(dockerfile_path) as dockerfile_file:
            for line in dockerfile_file:
                if line.startswith('FROM '):
                    dockerbase = line[5:].strip()
                    _logger.info("Docker base: %s", dockerbase)
    # load odoo_version.csv
    versions = {}
    # add path to script
    with open(os.path.join(basedir, 'odoo_versions.csv')) as versions_file:
        reader = csv.reader(versions_file, delimiter=',')
        for line in reader:
            versions[line[0]] = line[1]
    if odoo_type != 'bzr':
        odoo_version = versions.get(dockerbase, "Unknown")
    else:
        odoo_version = 'bzr'
    _logger.info("Odoo version %s", odoo_version)
    rst = {
        'odoo': {"Odoo": {'version': odoo_version}},
        'tools': {}, 'modules': {}, 'other': {},
    }
    # 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():
            if parser.get(section, 'layout') == 'odoo_scripts':
                rst['tools']['odoo_scripts'] = {
                    'version': parser.get(section, 'track'),
                    'repository': parser.get(section, 'pulluri'),
                }
            elif any(
                    parser.get(section, 'layout').startswith(dir)
                    for dir in addon_dirs
            ):
                rst['modules'][section] = {
                    'version': parser.get(section, 'track'),
                    'repository': parser.get(section, 'pulluri'),
                }
            else:
                rst['other'][section] = {
                    'version': parser.get(section, 'track'),
                    'repository': parser.get(section, 'pulluri'),
                }

    # TODO 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)
        _logger.error("confnest parsing not implemented")

    # output the rst
    if output:
        with open(output, 'wb') 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).
    """
    out.write("Versions\n")
    out.write("========\n\n")
    for group in ('odoo', 'modules', '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)
                out.write("     - %s\n" % rst[group][element]['version'])
            out.write("\n")

if __name__ == '__main__':
    main()