#!/usr/bin/env python
#
#    Copyright (c) 2013 Matthew Wall
#
#    See the file LICENSE.txt for your full rights.
#
"""Command line utility for configuring devices."""

import sys
import syslog

import weecfg

def main():
    syslog.openlog('wee_device', syslog.LOG_PID | syslog.LOG_CONS)
    syslog.setlogmask(syslog.LOG_UPTO(syslog.LOG_INFO))

    # Load the configuration file
    config_fn, config_dict = weecfg.read_config(None, sys.argv[1:])
    print 'Using configuration file %s' % config_fn

    try:
        # Find the device type
        device_type = config_dict['Station']['station_type']
        driver = config_dict[device_type]['driver']
    except KeyError, e:
        sys.exit("No configuration for device %s" % e)

    # Try to load the driver
    device = None
    try:
        __import__(driver)
        driver_module = sys.modules[driver]
        loader_function = getattr(driver_module, 'configurator_loader')
        device = loader_function(config_dict)
        driver_name = driver_module.DRIVER_NAME
        driver_vers = driver_module.DRIVER_VERSION \
            if hasattr(driver_module, 'DRIVER_VERSION') else '?'
        print 'Using %s driver version %s (%s)' % (
            driver_name, driver_vers, driver)
    except AttributeError, e:
        msg = "The driver %s does not include a configuration tool" % driver
        syslog.syslog(syslog.LOG_INFO, "%s: %s" % (msg, e))
        exit(0)
    except Exception, e:
        msg = "Cannot load configurator for %s" % device_type
        syslog.syslog(syslog.LOG_ERR, "%s: %s" % (msg, e))
        print msg
        exit(1)

    device.configure(config_dict)

if __name__ == "__main__":
    main()