# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2014 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

# Import system libs
from datetime import datetime, timedelta

# Check for psutil already done in the glances_core script
import psutil

# Import Glances libs
from glances.plugins.glances_plugin import GlancesPlugin

# SNMP OID
snmp_oid = {'_uptime': '1.3.6.1.2.1.1.3.0'}

class Plugin(GlancesPlugin):
    """
    Glances' Uptime Plugin
    Get stats about uptime

    stats is date (string)
    """

    def __init__(self, args=None):
        GlancesPlugin.__init__(self, args=args)

        # We want to display the stat in the curse interface
        self.display_curse = True
        # Set the message position
        # It is NOT the curse position but the Glances column/line
        # Enter -1 to right align
        self.column_curse = -1
        # Enter -1 to diplay bottom
        self.line_curse = 0
        # Init the stats
        self.reset()

    def reset(self):
        """
        Reset/init the stats
        """
        self.stats = {}

    def update(self):
        """
        Update uptime stat using the input method
        """

        # Reset stats
        self.reset()

        if self.get_input() == 'local':
            # Update stats using the standard system lib
            uptime = datetime.now() - datetime.fromtimestamp(psutil.boot_time())

            # Convert uptime to string (because datetime is not JSONifi)
            self.stats = str(uptime).split('.')[0]
        elif self.get_input() == 'snmp':
            # Update stats using SNMP
            uptime = self.set_stats_snmp(snmp_oid=snmp_oid)['_uptime']
            try:
                # In hundredths of seconds
                self.stats = str(timedelta(seconds=int(uptime) / 100))
            except:
                pass

        # Return the result
        return self.stats

    def msg_curse(self, args=None):
        """
        Return the string to display in the curse interface
        """

        # Init the return message
        ret = []

        # Add the line with decoration
        ret.append(self.curse_add_line(_("Uptime: {0}").format(self.stats)))

        # Return the message with decoration
        return ret
