#!/usr/bin/env python
# Copyright (c) 2010-2012 OpenStack, LLC.
#
# 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 logging
import os
import sys
import signal
import uuid
from optparse import OptionParser

from swift.common.bench import BenchController
from swift.common.utils import readconf, LogAdapter

# The defaults should be sufficient to run swift-bench on a SAIO
CONF_DEFAULTS = {
    'auth': '',
    'user': '',
    'key': '',
    'object_sources': '',
    'put_concurrency': '10',
    'get_concurrency': '10',
    'del_concurrency': '10',
    'concurrency': '',
    'object_size': '1',
    'num_objects': '1000',
    'num_gets': '10000',
    'delete': 'yes',
    'container_name': uuid.uuid4().hex,
    'num_containers': '20',
    'use_proxy': 'yes',
    'url': '',
    'account': '',
    'devices': 'sdb1',
    'log_level': 'INFO',
    'timeout': '10',
    }

SAIO_DEFAULTS = {
    'auth': 'http://saio:11000/v1.0',
    'user': 'test:tester',
    'key': 'testing',
    }

if __name__ == '__main__':
    usage = "usage: %prog [OPTIONS] [CONF_FILE]"
    usage += """\n\nConf file with SAIO defaults:

    [bench]
    auth = http://saio:11000/v1.0
    user = test:tester
    key = testing
    concurrency = 10
    object_size = 1
    num_objects = 1000
    num_gets = 10000
    delete = yes
    """
    parser = OptionParser(usage=usage)
    parser.add_option('', '--saio', dest='saio', action='store_true',
                      default=False, help='Run benchmark with SAIO defaults')
    parser.add_option('-A', '--auth', dest='auth',
                      help='URL for obtaining an auth token')
    parser.add_option('-U', '--user', dest='user',
                      help='User name for obtaining an auth token')
    parser.add_option('-K', '--key', dest='key',
                      help='Key for obtaining an auth token')
    parser.add_option('-u', '--url', dest='url',
                      help='Storage URL')
    parser.add_option('-c', '--concurrency', dest='concurrency',
                      help='Number of concurrent connections to use')
    parser.add_option('-s', '--object-size', dest='object_size',
                      help='Size of objects to PUT (in bytes)')
    parser.add_option('-n', '--num-objects', dest='num_objects',
                      help='Number of objects to PUT')
    parser.add_option('-g', '--num-gets', dest='num_gets',
                      help='Number of GET operations to perform')
    parser.add_option('-x', '--no-delete', dest='delete', action='store_false',
                      help='If set, will not delete the objects created')

    if len(sys.argv) == 1:
        parser.print_help()
        sys.exit(1)
    options, args = parser.parse_args()
    if options.saio:
        CONF_DEFAULTS.update(SAIO_DEFAULTS)
    if args:
        conf = args[0]
        if not os.path.exists(conf):
            sys.exit("No such conf file: %s" % conf)
        conf = readconf(conf, 'bench', log_name='swift-bench',
            defaults=CONF_DEFAULTS)
    else:
        conf = CONF_DEFAULTS
    parser.set_defaults(**conf)
    options, _junk = parser.parse_args()
    if options.concurrency is not '':
        options.put_concurrency = options.concurrency
        options.get_concurrency = options.concurrency
        options.del_concurrency = options.concurrency

    def sigterm(signum, frame):
        sys.exit('Termination signal received.')
    signal.signal(signal.SIGTERM, sigterm)

    logger = logging.getLogger()
    logger.setLevel({
        'debug': logging.DEBUG,
        'info': logging.INFO,
        'warning': logging.WARNING,
        'error': logging.ERROR,
        'critical': logging.CRITICAL}.get(
            options.log_level.lower(), logging.INFO))
    loghandler = logging.StreamHandler()
    logger.addHandler(loghandler)
    logger = LogAdapter(logger, 'swift-bench')
    logformat = logging.Formatter('%(server)s %(asctime)s %(levelname)s '
                                  '%(message)s')
    loghandler.setFormatter(logformat)

    controller = BenchController(logger, options)
    controller.run()
