# -*- coding: utf-8 -*-
#
# Copyright (c) 2014 Virtual Cable S.L.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
#    * Redistributions of source code must retain the above copyright notice,
#      this list of conditions and the following disclaimer.
#    * 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.
#    * Neither the name of Virtual Cable S.L. nor the names of its contributors
#      may be used to endorse or promote products derived from this software
#      without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT HOLDER 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.

'''
@author: Adolfo Gómez, dkmaster at dkmon dot com
'''
from __future__ import unicode_literals

import logging
import os
import tempfile
import six

# Valid logging levels, from UDS Broker (uds.core.utils.log)
OTHER, DEBUG, INFO, WARN, ERROR, FATAL = (10000 * (x + 1) for x in six.moves.xrange(6))  # @UndefinedVariable


class LocalLogger(object):
    def __init__(self):
        # tempdir is different for "user application" and "service"
        # service wil get c:\windows\temp, while user will get c:\users\XXX\temp
        # Try to open logger at /var/log path
        # If it fails (access denied normally), will try to open one at user's home folder, and if
        # agaim it fails, open it at the tmpPath

        for logDir in ('/var/log', os.path.expanduser('~'), tempfile.gettempdir()):
            try:
                fname = os.path.join(logDir, 'opengnsys.log')
                logging.basicConfig(
                    filename=fname,
                    filemode='a',
                    format='%(levelname)s %(asctime)s %(message)s',
                    level=logging.DEBUG
                )
                self.logger = logging.getLogger('opengnsys')
                os.chmod(fname, 0o0600)
                return
            except Exception:
                pass

        # Logger can't be set
        self.logger = None

    def log(self, level, message):
        # Debug messages are logged to a file
        # our loglevels are 10000 (other), 20000 (debug), ....
        # logging levels are 10 (debug), 20 (info)
        # OTHER = logging.NOTSET
        self.logger.log(int(level / 1000) - 10, message)

    def isWindows(self):
        return False

    def isLinux(self):
        return True