#!/cvmfs/dirac.egi.eu/dirac/7.3.22/diracos/bin/python
# PYTHON_ARGCOMPLETE_OK

import os
import sys
import logging
import argparse
import errno

# Initialize logging (ARCCTL namespace)
logger = logging.getLogger('ARCCTL')
logger.setLevel(logging.INFO)
log_handler_stderr = logging.StreamHandler()
log_handler_stderr.setFormatter(
    logging.Formatter('[%(asctime)s] [%(name)s] [%(levelname)s] [%(process)d] [%(message)s]'))
logger.addHandler(log_handler_stderr)

# Use the same setup for ARC namespace
arclogger = logging.getLogger('ARC')
arclogger.addHandler(log_handler_stderr)

# ARC-prefix path in PYTHONPATH
arc_prefix_pythonpath = '${prefix}/lib/python3.9/site-packages'.replace('${prefix}', '/cvmfs/dirac.egi.eu/dirac/7.3.22/diracos')
if os.path.isdir(arc_prefix_pythonpath):
    if arc_prefix_pythonpath not in sys.path:
        sys.path.insert(1, arc_prefix_pythonpath)

# Import ARC control and config modules
from arc.control import ControlCommon
from arc.control import *

# server side arc.conf parsing
from arc.utils import config


# Define root parser for arcctl
class ArgumentParserHelpOnError(argparse.ArgumentParser):
    """Override the default behavior of the ArgumentParser error method to show help message"""
    def error(self, message):
        sys.stderr.write('Error: %s\n\n' % message)
        self.print_help()
        sys.exit(2)


def get_parser():
    parser = ArgumentParserHelpOnError(description='NorduGrid ARC Control Tool')
    config_help = 'config file location (default is {0})'.format(config.arcconf_defpath())
    if not ControlCommon.arcctl_server_mode():
        config_help = argparse.SUPPRESS
    parser.add_argument('-c', '--config', action='store', help=config_help)
    parser.add_argument('-d', '--debug', action='store',
                        help='verbosity level (default is %(default)s)', default='WARNING',
                        choices=['CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG'])

    # Register subparsers for defined arc.control components
    subparsers = parser.add_subparsers(title='ARC Components', metavar='COMPONENT', help='DESCRIPTION')
    for c in CTL_COMPONENTS:
        c.register_parser(subparsers)
    return parser


if __name__ == '__main__':
    args_parser = get_parser()

    # Try to import and use argcomplete if available
    try:
        import argcomplete
        argcomplete.autocomplete(args_parser)
    except ImportError:
        argcomplete = None
        logger.debug('Cannot import argcomplete module. '
                     'Consider to install python-argcomplete to take advantage of arcctl tab-completion')

    # Parse command line arguments
    cmd_args = args_parser.parse_args()
    # Set log level for both ARCCTL. and ARC. logging namespaces
    loglevel = getattr(logging, cmd_args.debug, 30)
    logger.setLevel(loglevel)
    arclogger.setLevel(loglevel)
    # Define handler class (if present)
    if not hasattr(cmd_args, 'handler_class'):
        args_parser.print_help()
        sys.exit(1)
    ctl_class = cmd_args.handler_class

    # Invoke ARC control action
    try:
        ctl_class(ControlCommon.get_parsed_arcconf(cmd_args.config)).control(cmd_args)
    except IOError as e:
        # handle SIGPIPE termination
        if e.errno == errno.EPIPE:
            pass
        else:
            # Remove runtime config on any failures
            ControlCommon.remove_runtime_config()