#!/usr/bin/python2.7 -tt

"""
Copyright (c) 2011-2013 "Johannes Findeisen and Rafael Timmerberg"

This file is part of Linspector (http://linspector.org).

Linspector is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""


__version__ = "0.9"
__default_config__ = "./examples/minimal.json"

import argparse
import logging
import logging.handlers
import os
import os.path as path

from linspector.core.interface import LinspectorInterface
from linspector.config.parser import FullConfigParser
from linspector.core.job import Job
from linspector.core.scheduler import Scheduler
from linspector.backends.jsonrpc import JsonrpcBackend
from linspector.frontends.lish import LishFrontend


def parse_args():
    parser = argparse.ArgumentParser(
        description="Linspector is for monitoring the vital information of hosts, services and devices in a network.",
        epilog="linspector is not some program expecting computers to run! Visit http://linspector.org for more "
               "information.",
        prog="linspector")

    #TODO: add --nocolor to disable colored output in lish
    parser.add_argument("--version", action="version", version="%(prog)s " + str(__version__))
    #TODO: make the config file a required field without -c or --config at the end eg: linspector config.json
    parser.add_argument("-c", "--config", default=__default_config__,
                        help="select configfile to use")
    parser.add_argument("-l", "--logfile", default="./log/linspector.log", metavar="FILE",
                        help="set logfile to use")

    output = parser.add_mutually_exclusive_group()
    output.add_argument("-q", "--quiet", action="store_const", dest="loglevel", const=logging.ERROR,
                        help="output only errors")
    output.add_argument("-w", "--warning", action="store_const", dest="loglevel", const=logging.WARNING,
                        help="output warnings")
    output.add_argument("-v", "--verbose", action="store_const", dest="loglevel", const=logging.INFO,
                        help="output info messages")
    output.add_argument("-d", "--debug", action="store_const", dest="loglevel", const=logging.DEBUG,
                        help="output debug messages")
    output.set_defaults(loglevel=logging.INFO)
    return parser.parse_args()


def setup_logging(logfile="./log/linspector.log", logLevel=logging.ERROR, logfileLevel=logging.DEBUG):
    logfile = path.expanduser(logfile)
    if not path.exists(path.dirname(logfile)):
        os.makedirs(path.dirname(logfile))

    #logging.basicConfig(level=logging.WARNING)
    log = logging.getLogger(__name__)
    log.setLevel(logging.DEBUG)

    consoleHandler = logging.StreamHandler()
    consoleHandler.setLevel(logLevel)

    fileHandler = logging.handlers.RotatingFileHandler(logfile, maxBytes=1024000, backupCount=4)
    fileHandler.setLevel(logfileLevel)


    consoleFormatter = logging.Formatter('[%(levelname)s]: %(message)s')
    #TODO: if debug with file and function else without that
    fileFormatter = logging.Formatter('%(asctime)s %(pathname)s %(module)s %(funcName)s %(lineno)d [%(levelname)s]: %(message)s')

    consoleHandler.setFormatter(consoleFormatter)
    fileHandler.setFormatter(fileFormatter)

    log.addHandler(consoleHandler)
    log.addHandler(fileHandler)
    return log


def handle_job(jobInfo):
    jobInfo.handle_call()


def main():
    args = parse_args()
    #TODO: catch all log messages (apscheduler etc.); make logging more generic to support libraries logging
    log = setup_logging(args.logfile, args.loglevel)

    log.info("parsed arguments")

    configParser = FullConfigParser(log)
    linConf, core = configParser.parse_config(args.config)

    scheduler = Scheduler()

    scheduler.start()
    jobs = []

    for layout in linConf.get_enabled_layouts():
        for hostgroup in layout.get_hostgroups():
            for service in hostgroup.get_services():
                for host in hostgroup.get_hosts():
                    for period in service.get_periods():
                        job = Job(service, host, hostgroup.get_members(), hostgroup.get_processors(), core, hostgroup)
                        schedulerJob = period.createJob(scheduler, job, handle_job)
                        if schedulerJob is not None:
                            job.set_job(schedulerJob)
                            job.set_logger(log)
                            jobs.append(job)

    interface = LinspectorInterface(jobs, scheduler, linConf)

    if core["jsonrpc_backend"]:
        jsonrpc = JsonrpcBackend(interface, core)
        jsonrpc.daemon = True
        jsonrpc.start()

    LishFrontend(interface)

    log.debug("shutting down scheduler")
    scheduler.shutdown(wait=True)
    logging.shutdown()


if __name__ == "__main__":
    main()