#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
#
# Copyright (C) 2017 Lenovo, Inc.
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
#
# Module to save running config to start up config to Lenovo Switches
# Lenovo Networking
#

ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'community'}


DOCUMENTATION = '''
---
module: cnos_save
author: "Dave Kasberg (@dkasberg)"
short_description: Save the running configuration as the startup configuration on devices running Lenovo CNOS
description:
    - This module allows you to copy the running configuration of a switch over its startup configuration.
     It is recommended to use this module shortly after any major configuration changes so they persist after
     a switch restart. This module uses SSH to manage network device configuration.
     The results of the operation will be placed in a directory named 'results'
     that must be created by the user in their local directory to where the playbook is run.
     For more information about this module from Lenovo and customizing it usage for your
     use cases, please visit U(http://systemx.lenovofiles.com/help/index.jsp?topic=%2Fcom.lenovo.switchmgt.ansible.doc%2Fcnos_save.html)
version_added: "2.3"
extends_documentation_fragment: cnos
options: {}

'''
EXAMPLES = '''
Tasks : The following are examples of using the module cnos_save. These are written in the main.yml file of the tasks directory.
---
- name: Test Save
  cnos_save:
      host: "{{ inventory_hostname }}"
      username: "{{ hostvars[inventory_hostname]['username'] }}"
      password: "{{ hostvars[inventory_hostname]['password'] }}"
      deviceType: "{{ hostvars[inventory_hostname]['deviceType'] }}"
      enablePassword: "{{ hostvars[inventory_hostname]['enablePassword'] }}"
      outputfile: "./results/test_save_{{ inventory_hostname }}_output.txt"
'''
RETURN = '''
msg:
  description: Success or failure message
  returned: always
  type: string
  sample: "Switch Running Config is Saved to Startup Config"
'''

import sys
try:
    import paramiko
    HAS_PARAMIKO = True
except ImportError:
    HAS_PARAMIKO = False
import time
import socket
import array
import json
import time
import re
try:
    from ansible.module_utils.network.cnos import cnos
    HAS_LIB = True
except:
    HAS_LIB = False
from ansible.module_utils.basic import AnsibleModule
from collections import defaultdict


def main():
    module = AnsibleModule(
        argument_spec=dict(
            outputfile=dict(required=True),
            host=dict(required=True),
            username=dict(required=True),
            password=dict(required=True, no_log=True),
            enablePassword=dict(required=False, no_log=True),
            deviceType=dict(required=True),),
        supports_check_mode=False)

    username = module.params['username']
    password = module.params['password']
    enablePassword = module.params['enablePassword']
    cliCommand = "save memory \n"
    outputfile = module.params['outputfile']
    hostIP = module.params['host']
    deviceType = module.params['deviceType']
    output = ""
    if not HAS_PARAMIKO:
        module.fail_json(msg='paramiko is required for this module')

    # Create instance of SSHClient object
    remote_conn_pre = paramiko.SSHClient()

    # Automatically add untrusted hosts (make sure okay for security policy in your environment)
    remote_conn_pre.set_missing_host_key_policy(paramiko.AutoAddPolicy())

    # initiate SSH connection with the switch
    remote_conn_pre.connect(hostIP, username=username, password=password)
    time.sleep(2)

    # Use invoke_shell to establish an 'interactive session'
    remote_conn = remote_conn_pre.invoke_shell()
    time.sleep(2)

    # Enable and enter configure terminal then send command
    output = output + cnos.waitForDeviceResponse("\n", ">", 2, remote_conn)

    output = output + cnos.enterEnableModeForDevice(enablePassword, 3, remote_conn)

    # Make terminal length = 0
    output = output + cnos.waitForDeviceResponse("terminal length 0\n", "#", 2, remote_conn)

    # cnos.debugOutput(cliCommand)
    # Send the CLi command
    output = output + cnos.waitForDeviceResponse(cliCommand, "#", 2, remote_conn)

    # Save it into the file
    file = open(outputfile, "a")
    file.write(output)
    file.close()

    errorMsg = cnos.checkOutputForError(output)
    if(errorMsg is None):
        module.exit_json(changed=True, msg="Switch Running Config is Saved to Startup Config ")
    else:
        module.fail_json(msg=errorMsg)

if __name__ == '__main__':
    main()
