#!/usr/bin/env python
#
# Copyright 2014 Huawei Technologies Co. Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""utility binary to manage database."""
import os
import os.path
import sys


current_dir = os.path.dirname(os.path.realpath(__file__))
sys.path.append(current_dir)


import switch_virtualenv

from flask_script import Manager

from compass.api import app
from compass.db.api import database
from compass.db.api import switch as switch_api
from compass.db.api import user as user_api
from compass.utils import flags
from compass.utils import logsetting
from compass.utils import setting_wrapper as setting
from compass.utils import util


flags.add('table_name',
          help='table name',
          default='')
flags.add('clusters',
          help=(
              'clusters and hosts of each cluster, the format is as '
              'clusterid:hostname1,hostname2,...;...'),
          default='')
flags.add_bool('async',
               help='ryn in async mode',
               default=True)
flags.add('switch_machines_file',
          help=(
              'files for switches and machines '
              'connected to each switch. each line in the file '
              'is machine,<switch ip>,<switch port>,<vlan>,<mac> '
              'or switch,<switch_ip>,<switch_vendor>,'
              '<switch_version>,<switch_community>,<switch_state>'),
          default='')
flags.add('search_cluster_properties',
          help='comma separated properties to search in cluster config',
          default='')
flags.add('print_cluster_properties',
          help='comma separated cluster config properties to print',
          default='')
flags.add('search_host_properties',
          help='comma separated properties to search in host config',
          default='')
flags.add('print_host_properties',
          help='comma separated host config properties to print',
          default='')


app_manager = Manager(app, usage="Perform database operations")


TABLE_MAPPING = {
}


@app_manager.command
def list_config():
    "List the commands."
    for key, value in app.config.items():
        print key, value


@app_manager.command
def checkdb():
    """check if db exists."""
    if setting.DATABASE_TYPE == 'file':
        if os.path.exists(setting.DATABASE_FILE):
            sys.exit(0)
        else:
            sys.exit(1)

    sys.exit(0)


@app_manager.command
def createdb():
    """Creates database from sqlalchemy models."""
    database.init()
    try:
        database.drop_db()
    except Exception:
        pass

    if setting.DATABASE_TYPE == 'file':
        if os.path.exists(setting.DATABASE_FILE):
            os.remove(setting.DATABASE_FILE)
    database.create_db()
    if setting.DATABASE_TYPE == 'file':
        os.chmod(setting.DATABASE_FILE, 0o777)


@app_manager.command
def dropdb():
    """Drops database from sqlalchemy models."""
    database.init()
    database.drop_db()


@app_manager.command
def set_switch_machines():
    """Set switches and machines.

    .. note::
       --switch_machines_file is the filename which stores all switches
       and machines information.
       each line in fake_switches_files presents one machine.
       the format of each line machine,<switch_ip>,<switch_port>,<vlan>,<mac>
       or switch,<switch_ip>,<switch_vendor>,<switch_version>,
       <switch_community>,<switch_state>
    """
    if not flags.OPTIONS.switch_machines_file:
        print 'flag --switch_machines_file is missing'
        return
    database.init()
    switches, switch_machines = util.get_switch_machines_from_file(
        flags.OPTIONS.switch_machines_file)
    user = user_api.get_user_object(
        setting.COMPASS_ADMIN_EMAIL
    )
    switch_mapping = {}
    for switch in switches:
        added_switch = switch_api.add_switch(
            False, user=user, **switch
        )
        switch_mapping[switch['ip']] = added_switch['id']
    for switch_ip, machines in switch_machines.items():
        if switch_ip not in switch_mapping:
            print 'switch ip %s not found' % switch_ip
            sys.exit(1)
        switch_id = switch_mapping[switch_ip]
        for machine in machines:
            switch_api.add_switch_machine(
                switch_id, False, user=user, **machine
            )


if __name__ == "__main__":
    flags.init()
    logsetting.init()
    app_manager.run()