# -*- coding: utf-8 -*-

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""

kallithea.lib.paster_commands.make_config

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

make-config gearbox command for Kallithea

:license: GPLv3, see LICENSE.md for more details.

"""

import os

import sys

import uuid

import argparse

from collections import defaultdict

import mako.exceptions

from kallithea.lib.paster_commands.common import BasePasterCommand

from kallithea.lib import inifile

class Command(BasePasterCommand):

    """Kallithea: Create a new config file

    make-config is part of a two-phase installation process (the

    second phase is setup-app). make-config creates a bare configuration

    file (possibly filling in defaults from the extra

    variables you give).

    The first key=value arguments are used to customize the Mako variables that

    are shown with --show-defaults. The following settings will be

    patched/inserted in the [app:main] section ... until another section name

    is specified and change where the following values go.

    """

    takes_config_file = False # at least not an existing one ...

    def take_action(self, args):

        _run(args)

    def get_parser(self, prog_name):

        parser = super(Command, self).get_parser(prog_name)

        parser.add_argument('config_file', nargs='?',

            help='application config file to write')

        parser.add_argument('custom', nargs=argparse.REMAINDER,

            help='custom values for the config file')

        parser.add_argument('--show-defaults', action='store_true',

            help="Show the default values that can be overridden")

        return parser

def _run(args):

    if args.config_file is None:

        if not args.show_defaults:

            raise ValueError("Missing argument: config_file")

    else:

        if args.show_defaults:

            raise ValueError("Can't specify both config_file and --show_defaults")

    mako_variable_values = {}

    ini_settings = defaultdict(dict)

    section_name = None

    for parameter in args.custom:

        parts = parameter.split('=', 1)

        if len(parts) == 1 and parameter.startswith('[') and parameter.endswith(']'):

            section_name = parameter

        elif len(parts) == 2:

            key, value = parts

            if section_name is None and key in inifile.default_variables:

                mako_variable_values[key] = value

            else:

                if section_name is None:

                    section_name = '[app:main]'

                ini_settings[section_name][key] = value

        else:

            raise ValueError("Invalid name=value parameter %r" % parameter)

    if args.show_defaults:

        for key, value in inifile.default_variables.items():

            value = mako_variable_values.get(key, value)

            print '%s=%s' % (key, value)

        sys.exit(0)

    # use default that cannot be replaced

    mako_variable_values.update({

        'uuid': lambda: uuid.uuid4().hex,

    })

    try:

        config_file = os.path.abspath(args.config_file)

        inifile.create(config_file, mako_variable_values, ini_settings)

        print 'Wrote new config file in %s' % config_file

    except Exception:

        print mako.exceptions.text_error_template().render()