#!/usr/bin/python2
#
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import argparse
import os.path
import sys
import logging
from etceanalytics.configdoc import ConfigDoc
from etceanalytics.sessionanalyzer import SessionAnalyzer


if __name__=='__main__':
    parser = argparse.ArgumentParser(description=SessionAnalyzer.__doc__)

    parser.add_argument('--configfile',
                        default = None,
                        help='analysis configuration file')
    parser.add_argument('--noreanalyze',
                        action='store_true',
                        default=False,
                        help="Don't regenerate an intermediate or final analysis output "
                        "file when it already exists.")
    parser.add_argument('--loglevel',
                        choices=['error', 'info', 'debug'],
                        default='error',
                        help='Log level')
    parser.add_argument('--keepfiles',
                        action='store_true',
                        default=False,
                        help="""Keep intermediate analysis output files generated for each host and trial. For each trial
                        directory found in the sessionroot directory, host and trial outputs are placed in
                        sessionroot/trial_directory/results. Host outputs have the hostname prefixed, and the combined
                        trial file has no prefix. The default behavior is to delete these outputs. Preserving
                        intermediate files is generally useful for developing and debugging a new analyzer, but is redundant
                        for regular analysis as the individual node outputs are combined into
                        session results placed in sessionroot/results.
                        """)
    parser.add_argument('--keepgoing',
                        action='store_true',
                        default=False,
                        help='Keep going when an error is detected. Default: quit.')

    parser.add_argument('sessionroot',
                        help='the session directory to analyze')

    args = parser.parse_args()

    if args.configfile and not os.path.isfile(args.configfile):
        print('Config file "%s" does not exist or is not a file. Quitting.' \
              % (args.configfile))

        sys.exit(1)

    config = ConfigDoc(args.configfile)

    loglevel = { 'error':logging.ERROR,
                 'info':logging.INFO,
                 'debug':logging.DEBUG}[args.loglevel]

    logging.basicConfig(format='[%(module)s]: %(message)s', level=loglevel)

    SessionAnalyzer(config, args).analyze(args.sessionroot,
                                          args.noreanalyze,
                                          args.keepfiles)
