#    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.

from oslo_config import cfg

from oslo_log import versionutils

_DEFAULT_LOG_DATE_FORMAT = "%Y-%m-%d %H:%M:%S"

DEFAULT_LOG_LEVELS = ['amqp=WARN', 'amqplib=WARN', 'boto=WARN',
                      'qpid=WARN', 'sqlalchemy=WARN', 'suds=INFO',
                      'oslo.messaging=INFO', 'oslo_messaging=INFO',
                      'iso8601=WARN',
                      'requests.packages.urllib3.connectionpool=WARN',
                      'urllib3.connectionpool=WARN', 'websocket=WARN',
                      'requests.packages.urllib3.util.retry=WARN',
                      'urllib3.util.retry=WARN',
                      'keystonemiddleware=WARN', 'routes.middleware=WARN',
                      'stevedore=WARN', 'taskflow=WARN',
                      'keystoneauth=WARN', 'oslo.cache=INFO',
                      'oslo_policy=INFO',
                      'dogpile.core.dogpile=INFO']

_IGNORE_MESSAGE = "This option is ignored if log_config_append is set."

common_cli_opts = [
    cfg.BoolOpt('debug',
                short='d',
                default=False,
                mutable=True,
                help='If set to true, the logging level will be set to '
                     'DEBUG instead of the default INFO level.'),
]

logging_cli_opts = [
    cfg.StrOpt('log-config-append',
               metavar='PATH',
               deprecated_name='log-config',
               mutable=True,
               help='The name of a logging configuration file. This file '
                    'is appended to any existing logging configuration '
                    'files. For details about logging configuration files, '
                    'see the Python logging module documentation. Note that '
                    'when logging configuration files are used then all '
                    'logging configuration is set in the configuration file '
                    'and other logging configuration options are ignored '
                    '(for example, log-date-format).'),
    cfg.StrOpt('log-date-format',
               default=_DEFAULT_LOG_DATE_FORMAT,
               metavar='DATE_FORMAT',
               help='Defines the format string for %%(asctime)s in log '
                    'records. Default: %(default)s . '
                    + _IGNORE_MESSAGE),
    cfg.StrOpt('log-file',
               metavar='PATH',
               deprecated_name='logfile',
               help='(Optional) Name of log file to send logging output to. '
                    'If no default is set, logging will go to stderr as '
                    'defined by use_stderr. '
                    + _IGNORE_MESSAGE),
    cfg.StrOpt('log-dir',
               deprecated_name='logdir',
               help='(Optional) The base directory used for relative log_file '
                    ' paths. '
                    + _IGNORE_MESSAGE),
    cfg.BoolOpt('watch-log-file',
                default=False,
                help='Uses logging handler designed to watch file '
                     'system. When log file is moved or removed this handler '
                     'will open a new log file with specified path '
                     'instantaneously. It makes sense only if log_file option '
                     'is specified and Linux platform is used. '
                     + _IGNORE_MESSAGE),
    cfg.BoolOpt('use-syslog',
                default=False,
                help='Use syslog for logging. '
                     'Existing syslog format is DEPRECATED '
                     'and will be changed later to honor RFC5424. '
                     + _IGNORE_MESSAGE),
    cfg.BoolOpt('use-journal',
                default=False,
                help='Enable journald for logging. '
                     'If running in a systemd environment you may wish '
                     'to enable journal support. Doing so will use the '
                     'journal native protocol which includes structured '
                     'metadata in addition to log messages.'
                     + _IGNORE_MESSAGE),
    cfg.StrOpt('syslog-log-facility',
               default='LOG_USER',
               help='Syslog facility to receive log lines. '
                    + _IGNORE_MESSAGE),
    cfg.BoolOpt('use-json',
                default=False,
                help='Use JSON formatting for logging. '
                     + _IGNORE_MESSAGE),
]

generic_log_opts = [
    cfg.BoolOpt('use_stderr',
                default=False,
                help='Log output to standard error. '
                     + _IGNORE_MESSAGE),
    cfg.BoolOpt('use_eventlog',
                default=False,
                help='Log output to Windows Event Log.'),
    cfg.IntOpt('log_rotate_interval',
               default=1,
               help='The amount of time before the log files are rotated. '
                    'This option is ignored unless log_rotation_type is set '
                    'to "interval".'),
    cfg.StrOpt('log_rotate_interval_type',
               choices=['Seconds', 'Minutes', 'Hours', 'Days', 'Weekday',
                        'Midnight'],
               ignore_case=True,
               default='days',
               help='Rotation interval type. The time of the last file '
                    'change (or the time when the service was started) is '
                    'used when scheduling the next rotation.'),
    cfg.IntOpt('max_logfile_count',
               default=30,
               help='Maximum number of rotated log files.'),
    cfg.IntOpt('max_logfile_size_mb',
               default=200,
               help='Log file maximum size in MB. This option is ignored if '
                    '"log_rotation_type" is not set to "size".'),
    cfg.StrOpt('log_rotation_type',
               default='none',
               choices=[('interval',
                         'Rotate logs at predefined time intervals.'),
                        ('size',
                         'Rotate logs once they reach a predefined size.'),
                        ('none', 'Do not rotate log files.')],
               ignore_case=True,
               help='Log rotation type.')
]

log_opts = [
    cfg.StrOpt('logging_context_format_string',
               default='%(asctime)s.%(msecs)03d %(process)d %(levelname)s '
                       '%(name)s [%(global_request_id)s %(request_id)s '
                       '%(user_identity)s] %(instance)s%(message)s',
               help='Format string to use for log messages with context. '
                    'Used by oslo_log.formatters.ContextFormatter'),
    cfg.StrOpt('logging_default_format_string',
               default='%(asctime)s.%(msecs)03d %(process)d %(levelname)s '
                       '%(name)s [-] %(instance)s%(message)s',
               help='Format string to use for log messages when context is '
                    'undefined. '
                    'Used by oslo_log.formatters.ContextFormatter'),
    cfg.StrOpt('logging_debug_format_suffix',
               default='%(funcName)s %(pathname)s:%(lineno)d',
               help='Additional data to append to log message when logging '
                    'level for the message is DEBUG. '
                    'Used by oslo_log.formatters.ContextFormatter'),
    cfg.StrOpt('logging_exception_prefix',
               default='%(asctime)s.%(msecs)03d %(process)d ERROR %(name)s '
               '%(instance)s',
               help='Prefix each line of exception output with this format. '
                    'Used by oslo_log.formatters.ContextFormatter'),
    cfg.StrOpt('logging_user_identity_format',
               default='%(user)s %(project)s %(domain)s %(system_scope)s '
                       '%(user_domain)s %(project_domain)s',
               help='Defines the format string for %(user_identity)s that '
                    'is used in logging_context_format_string. '
                    'Used by oslo_log.formatters.ContextFormatter'),
    cfg.ListOpt('default_log_levels',
                default=DEFAULT_LOG_LEVELS,
                help='List of package logging levels in logger=LEVEL pairs. '
                     + _IGNORE_MESSAGE),
    cfg.BoolOpt('publish_errors',
                default=False,
                help='Enables or disables publication of error events.'),

    # NOTE(mikal): there are two options here because sometimes we are handed
    # a full instance (and could include more information), and other times we
    # are just handed a UUID for the instance.
    cfg.StrOpt('instance_format',
               default='[instance: %(uuid)s] ',
               help='The format for an instance that is passed with the log '
                    'message.'),
    cfg.StrOpt('instance_uuid_format',
               default='[instance: %(uuid)s] ',
               help='The format for an instance UUID that is passed with the '
                    'log message.'),

    cfg.IntOpt('rate_limit_interval',
               default=0,
               help='Interval, number of seconds, of log rate limiting.'),
    cfg.IntOpt('rate_limit_burst',
               default=0,
               help='Maximum number of logged messages per '
                    'rate_limit_interval.'),
    cfg.StrOpt('rate_limit_except_level',
               default='CRITICAL',
               help='Log level name used by rate limiting: CRITICAL, ERROR, '
                    'INFO, WARNING, DEBUG or empty string. Logs with level '
                    'greater or equal to rate_limit_except_level are not '
                    'filtered. An empty string means that all levels are '
                    'filtered.'),
]


def list_opts():
    """Returns a list of oslo.config options available in the library.

    The returned list includes all oslo.config options which may be registered
    at runtime by the library.

    Each element of the list is a tuple. The first element is the name of the
    group under which the list of elements in the second element will be
    registered. A group name of None corresponds to the [DEFAULT] group in
    config files.

    The purpose of this is to allow tools like the Oslo sample config file
    generator (oslo-config-generator) to discover the options exposed to users
    by this library.

    :returns: a list of (group_name, opts) tuples
    """
    return [(None, (common_cli_opts + logging_cli_opts +
                    generic_log_opts + log_opts +
                    versionutils.deprecated_opts))]
