# -*- python -*-
# -*- coding: utf8 -*-
#
# Debian Member Portfolio Service url builder
#
# Copyright © 2009-2020 Jan Dittberner <jan@dittberner.info>
#
# This file is part of the Debian Member Portfolio Service.
#
# Debian Member Portfolio Service is free software: you can redistribute it
# and/or modify it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the License,
# or (at your option) any later version.
#
# Debian Member Portfolio Service 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 Affero
# General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#
"""
This module provides the function build_urls to build personalized
URLs using the given information and the URL patterns defined in
portfolio.ini.
"""

from configparser import ConfigParser, InterpolationMissingOptionError
from encodings.utf_8 import StreamReader as UTF8StreamReader

import pkg_resources
from debianmemberportfolio.model import keyfinder
from urllib.parse import quote_plus
from flask_babel import gettext as _, lazy_gettext as N_


my_config = ConfigParser()
my_config.read_file(UTF8StreamReader(
    pkg_resources.resource_stream(__name__, 'portfolio.ini')))

_FIELDNAMES_MAP = {
    'email': N_('Email address'),
    'name': N_('Name'),
    'gpgfp': N_('GPG fingerprint'),
    'username': N_('Debian user name'),
    'nonddemail': N_('Non Debian email address'),
    'salsausername': N_('Salsa user name'),
}


class DDPortfolioEntry(object):
    def __init__(self, config, section, key):
        self.name = key
        self.optional = config.has_option(section, key + '.optional') and \
            config.getboolean(section, key + '.optional') or False
        if config.has_option(section, key + '.type'):
            self.type = config.get(section, key + '.type')
        else:
            self.type = 'url'


def _build_quoted_fields(fields):
    """
    Take a dictionary of raw field values and quote the values if required.
    """
    qfields = {}
    for key, value in fields.items():
        if value is not None:
            if isinstance(value, str):
                qfields[key] = quote_plus(value.encode('utf8'))
            elif isinstance(value, str):
                qfields[key] = quote_plus(value)
            else:
                qfields[key] = value
            qfields[key] = str(qfields[key]).replace('%', '%%')

    if 'gpgfp' not in qfields:
        fpr = keyfinder.getFingerprintByEmail(fields['email'].encode('utf8'))
        if fpr:
            qfields['gpgfp'] = fpr[0]
    qfields['firstchar'] = fields['email'][0].encode('utf8')
    qfields['emailnoq'] = fields['email'].encode('utf8')
    return qfields


def build_urls(fields):
    """Build personalized URLs using the developer information in
    fields."""
    data = []
    qfields = _build_quoted_fields(fields)
    for section in [section.strip() for section in
                    my_config.get('DEFAULT',
                                  'urlbuilder.sections').split(',')]:
        data.append(['section', section])
        if my_config.has_option(section, 'urls'):
            for entry in ([
                DDPortfolioEntry(my_config, section, url) for url in
                    my_config.get(section, 'urls').split(',')]):
                try:
                    data.append(
                        ['url', section, entry,
                         my_config.get(section, entry.name + '.pattern',
                                       raw=False, vars=qfields)])
                except InterpolationMissingOptionError as e:
                    if not entry.optional:
                        if e.reference in _FIELDNAMES_MAP:
                            data.append(['error', section, entry,
                                         _('Missing input: %s') %
                                         _(_FIELDNAMES_MAP[e.reference])])
                        else:
                            data.append(['error', section, entry,
                                         _('Missing input: %s') % e.reference])
    return data