#!/usr/bin/python
#
# Copyright (c) 2003 Intel Corporation
# All rights reserved.
#
# Copyright (c) 2004-2006 The Trustees of Princeton University
# All rights reserved.

from Exceptions import *
import BootAPI
import notify_messages
import os.path


def Run(vars, log):
    """
    UpdateLastBootOnce will update the last_* values for the node only
    once per boot.  This helps calculate last_time_spent_online and
    last_time_spent_offline for collecting run-time metrics.
    """

    log.write("\n\nStep: Updating node last boot times at PLC.\n")

    update_vals = {}
    try:
        if not os.path.isfile("/tmp/UPDATE_LAST_BOOT_ONCE"):
            BootAPI.call_api_function(vars, "BootUpdateNode", (update_vals,) )
            log.write("Successfully updated boot state for this node at PLC\n")
            os.system("touch /tmp/UPDATE_LAST_BOOT_ONCE")
    except BootManagerException as e:
        log.write("Unable to update last boot times for this node at PLC: {}.\n"
                  .format(e))
    return 1