#!/usr/bin/env python
#
# Copyright 2012 New Dream Network (DreamHost)
#
# 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.
import sys

from oslo_config import cfg
import six

from ceilometer import storage


def show_users(db, args):
    for u in sorted(db.get_users()):
        print(u)


def show_resources(db, args):
    if args:
        users = args
    else:
        users = sorted(db.get_users())
    for u in users:
        print(u)
        for resource in db.get_resources(user=u):
            print('  %(resource_id)s %(timestamp)s' % resource)
            for k, v in sorted(six.iteritems(resource['metadata'])):
                print('      %-10s : %s' % (k, v))
            for meter in resource['meter']:
                totals = db.get_statistics(storage.SampleFilter(
                    user=u,
                    meter=meter['counter_name'],
                    resource=resource['resource_id'],
                ))
                # FIXME(dhellmann): Need a way to tell whether to use
                # max() or sum() by meter name without hard-coding.
                if meter['counter_name'] in ['cpu', 'disk']:
                    value = totals[0]['max']
                else:
                    value = totals[0]['sum']
                print('    %s (%s): %s' %
                      (meter['counter_name'], meter['counter_type'], value))


def show_total_resources(db, args):
    if args:
        users = args
    else:
        users = sorted(db.get_users())
    for u in users:
        print(u)
        for meter in ['disk', 'cpu', 'instance']:
            stats = db.get_statistics(storage.SampleFilter(
                user=u,
                meter=meter,
            ))
            if meter in ['cpu', 'disk']:
                total = stats['max']
            else:
                total = stats['sum']
            print('  ', meter, total)


def show_raw(db, args):
    fmt = '    %(timestamp)s %(counter_name)10s %(counter_volume)s'
    for u in sorted(db.get_users()):
        print(u)
        for resource in db.get_resources(user=u):
            print('  ', resource['resource_id'])
            for sample in db.get_samples(storage.SampleFilter(
                    user=u,
                    resource=resource['resource_id'],
            )):
                print(fmt % sample)


def show_help(db, args):
    print('COMMANDS:')
    for name in sorted(COMMANDS.keys()):
        print(name)


def show_projects(db, args):
    for u in sorted(db.get_projects()):
        print(u)


COMMANDS = {
    'users': show_users,
    'projects': show_projects,
    'help': show_help,
    'resources': show_resources,
    'total_resources': show_total_resources,
    'raw': show_raw,
}


def main(argv):
    extra_args = cfg.CONF(
        sys.argv[1:],
        # NOTE(dhellmann): Read the configuration file(s) for the
        # ceilometer collector by default.
        default_config_files=['/etc/ceilometer/ceilometer.conf'],
    )
    db = storage.get_connection_from_config(cfg.CONF)
    command = extra_args[0] if extra_args else 'help'
    COMMANDS[command](db, extra_args[1:])


if __name__ == '__main__':
    main(sys.argv)