# ***** BEGIN GPL LICENSE BLOCK *****
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
#
# (c) 2018, Blender Foundation - Sybren A. Stüvel
"""Commandline entry points."""

import argparse
import datetime
import logging
import time

from . import blocks, common, pack, list_deps


def cli_main():
    from blender_asset_tracer import __version__
    parser = argparse.ArgumentParser(description='BAT: Blender Asset Tracer v%s' % __version__)
    common.add_flag(parser, 'profile', help='Run the profiler, write to bam.prof')

    # func is set by subparsers to indicate which function to run.
    parser.set_defaults(func=None,
                        loglevel=logging.WARNING)
    loggroup = parser.add_mutually_exclusive_group()
    loggroup.add_argument('-v', '--verbose', dest='loglevel',
                          action='store_const', const=logging.INFO,
                          help='Log INFO level and higher')
    loggroup.add_argument('-d', '--debug', dest='loglevel',
                          action='store_const', const=logging.DEBUG,
                          help='Log everything')
    loggroup.add_argument('-q', '--quiet', dest='loglevel',
                          action='store_const', const=logging.ERROR,
                          help='Log at ERROR level and higher')
    subparsers = parser.add_subparsers(
        help='Choose a subcommand to actually make BAT do something. '
             'Global options go before the subcommand, '
             'whereas subcommand-specific options go after it. '
             'Use --help after the subcommand to get more info.')

    blocks.add_parser(subparsers)
    pack.add_parser(subparsers)
    list_deps.add_parser(subparsers)

    args = parser.parse_args()
    config_logging(args)

    from blender_asset_tracer import __version__
    log = logging.getLogger(__name__)

    # Make sure the things we log in our local logger are visible
    if args.profile and args.loglevel > logging.INFO:
        log.setLevel(logging.INFO)
    log.debug('Running BAT version %s', __version__)

    if not args.func:
        parser.error('No subcommand was given')

    start_time = time.time()
    if args.profile:
        import cProfile

        prof_fname = 'bam.prof'
        log.info('Running profiler')
        cProfile.runctx('args.func(args)',
                        globals=globals(),
                        locals=locals(),
                        filename=prof_fname)
        log.info('Profiler exported data to %s', prof_fname)
        log.info('Run "pyprof2calltree -i %r -k" to convert and open in KCacheGrind', prof_fname)
    else:
        retval = args.func(args)
    duration = datetime.timedelta(seconds=time.time() - start_time)
    log.info('Command took %s to complete', duration)


def config_logging(args):
    """Configures the logging system based on CLI arguments."""

    logging.basicConfig(
        level=logging.WARNING,
        format='%(asctime)-15s %(levelname)8s %(name)-40s %(message)s',
    )
    # Only set the log level on our own logger. Otherwise
    # debug logging will be completely swamped.
    logging.getLogger('blender_asset_tracer').setLevel(args.loglevel)