# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4

###############################################################################
# ScribeEngine - Open Source Blog Software                                    #
# --------------------------------------------------------------------------- #
# Copyright (c) 2010-2017 Raoul Snyman                                        #
# --------------------------------------------------------------------------- #
# 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; version 2 of the License.                              #
#                                                                             #
# 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, write to the Free Software Foundation, Inc., 59  #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
###############################################################################
"""
The :mod:`~scribeengine.config` module contains helper classes for config handling
"""
from configparser import ConfigParser

BOOLEAN_VALUES = ['yes', 'true', 'on', 'no', 'false', 'off']


def _fix_special_cases(config):
    """
    Deal with special cases
    """
    if 'THEME_PATHS' in config:
        config['THEME_PATHS'] = [p.strip() for p in config['THEME_PATHS'].split(',') if p.strip()]


def read_config_from_file(filename):
    """
    Read the Flask configuration from a config file
    """
    flask_config = {}
    config = ConfigParser()
    config.read(filename)
    for section in config.sections():
        for option in config.options(section):
            # Get the value, skip it if it is blank
            string_value = config.get(section, option)
            if not string_value:
                continue
            # Try to figure out what type it is
            if string_value.isnumeric() and '.' in string_value:
                value = config.getfloat(section, option)
            elif string_value.isnumeric():
                value = config.getint(section, option)
            elif string_value.lower() in BOOLEAN_VALUES:
                value = config.getboolean(section, option)
            else:
                value = string_value
            # Set up the configuration key
            if section == 'flask':
                # Options in the flask section don't need FLASK_*
                key = option.upper()
            else:
                key = '{}_{}'.format(section, option).upper()
            # Save this into our flask config dictionary
            flask_config[key] = value
    _fix_special_cases(flask_config)
    return flask_config