#!/usr/bin/env python
# -*- coding: utf-8 -*-
# soledad-create-userdb
# Copyright (C) 2015-2017 LEAP
#
# 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/>.
import os
import sys
import netrc
import argparse
from leap.soledad.common.couch import CouchDatabase
from leap.soledad.common.couch.state import is_db_name_valid
from leap.soledad.server._config import get_config


BYPASS_AUTH = os.environ.get('SOLEDAD_BYPASS_AUTH', False)


description = """
Creates a user database.
This is meant to be used by Soledad Server.
"""
parser = argparse.ArgumentParser(description=description)
parser.add_argument('dbname', metavar='user-d34db33f', type=str,
                    default='', nargs='?',
                    help='database name on the format user-{uuid4}')
CONF = get_config()
DBCONF = get_config(section='database-security')
NETRC_PATH = CONF['admin_netrc']


def url_for_db(dbname):
    if BYPASS_AUTH:
        login = ''
        password = ''
        host = 'localhost'
        url = 'http://localhost:5984/%(dbname)s' % {
            'dbname': dbname}
    else:
        if not os.path.exists(NETRC_PATH):
            print ('netrc not found in %s' % NETRC_PATH)
            sys.exit(1)
        parsed_netrc = netrc.netrc(NETRC_PATH)
        host, (login, _, password) = parsed_netrc.hosts.items()[0]
        url = ('http://%(login)s:%(password)s@%(host)s:5984/%(dbname)s' % {
               'login': login,
               'password': password,
               'host': host,
               'dbname': dbname})
    return url


def ensure_database(dbname):
    """
    This method will ensure that a database named `dbname` will exist
    or created if it doesn't. Calling it twice will ensure that design
    documents are present and updated.
    The database name has to match this criteria to be considered valid:
    user-[a-f0-9]+

    :param dbname: name of the user database
    :type dbname: str
    """
    if not is_db_name_valid(dbname):
        print ("Invalid name! %s" % dbname)
        sys.exit(1)
    url = url_for_db(dbname)
    db_security = DBCONF
    db = CouchDatabase.open_database(url=url, create=True,
                                     replica_uid=None,
                                     database_security=db_security)
    print ('success! Ensured that database %s exists, with replica_uid: %s' %
           (db._dbname, db.replica_uid))


if __name__ == '__main__':
    args = parser.parse_args()
    ensure_database(args.dbname)