#!/usr/bin/env python

############################################################################
# Monitor & control fermenter temperature 
# v1.0
#
# $Id: beermon.py,v 1.7 2007/09/29 14:39:59 darius Exp $
#
# Depends on: Python 2.3 (I think)
#
############################################################################
#
# Copyright (C) 2007 Daniel O'Connor. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
############################################################################


import time, logging, sys, traceback, ConfigParser, MonitorDev, Control
from logging.handlers import RotatingFileHandler

def initLog():
    # Init our logging
    log = logging.getLogger("monitor")

    # Default to warts and all logging
    log.setLevel(logging.DEBUG)

    # Log to this file
    logfile = logging.handlers.RotatingFileHandler(filename = "/tmp/beermon.log",
                                                   maxBytes = 1000000, backupCount = 3)

    # And stderr
    logstderr = logging.StreamHandler()

    # Format it nicely
    formatter = logging.Formatter(fmt = "%(asctime)s: %(message)s", datefmt = "%Y/%m/%d %H:%M:%S")

    # Glue it all together
    logfile.setFormatter(formatter)
    logstderr.setFormatter(formatter)
    log.addHandler(logfile)
    log.addHandler(logstderr)
    return(log)

def main():
    global log
    log = initLog()

    conf = ConfigParser.ConfigParser()
    conf.read('beermon.ini')

    for s in ['control', 'hardware']:
        if (not conf.has_section(s)):
            log.debug("Mandatory '%s' section missing from config file, exiting" % (s))
            sys.exit(1)

    log.debug("=== Initing ===")
    log.debug("$Id: beermon.py,v 1.7 2007/09/29 14:39:59 darius Exp $")

    try:
        m = MonitorDev.MonitorDev(log, conf)
        c = Control.Control(log, m, conf)
    except ConfigParser.NoOptionError, e:
        log.debug("Mandatory option '%s' missing from section '%s'" % (e.option, e.section))
        sys.exit(1)
    except ValueError, e:
        log.debug("Unable to parse option - " + str(e))

    exitCode = 0
    try:
        # Wait for the first temperature readings to come through, saves
        # getting an 'invalid data' message
        # XXX: sleep on condvar holding data?
        time.sleep(3)
        c.doit()
        log.debug("doit exited")

    except KeyboardInterrupt:
        log.debug("Exiting due to keyboard interrupt")

    except Exception, e:
        log.debug("Something went wrong, details below:")
        log.debug(e)
        log.debug(reduce(lambda x, y: x + y, traceback.format_exception(
            sys.exc_type, sys.exc_value, sys.exc_traceback)))
        exitCode = 1

    finally:
        # Make sure we try and turn it off if something goes wrong
        if (m != None):
            m.setState('idle')

    sys.exit(exitCode)
    
if __name__ == "__main__":  
    main()