#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# 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 Reset to factory settings of Lenovo Switches
# Lenovo Networking
#

ANSIBLE_METADATA = {'status': ['preview'],
                    'supported_by': 'community',
                    'version': '1.0'}

DOCUMENTATION = '''
---
module: cnos_factory
author: "Dave Kasberg (@dkasberg)"
short_description: Reset the switch's startup configuration to default (factory) on devices running Lenovo CNOS
description:
    - This module allows you to reset a switch’s startup configuration. The method provides a way to reset the
     startup configuration to its factory settings. This is helpful when you want to move the switch to another
     topology as a new network device.
     This module uses SSH to manage network device configuration.
     The results of the operation can be viewed in results directory.
     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_factory.html)
version_added: "2.3"
extends_documentation_fragment: cnos
options: {}

'''
EXAMPLES = '''
Tasks : The following are examples of using the module cnos_reload. These are written in the main.yml file of the tasks directory.
---
- name: Test Reset to factory
  cnos_factory:
      host: "{{ inventory_hostname }}"
      username: "{{ hostvars[inventory_hostname]['username'] }}"
      password: "{{ hostvars[inventory_hostname]['password'] }}"
      deviceType: "{{ hostvars[inventory_hostname]['deviceType'] }}"
      outputfile: "./results/test_factory_{{ inventory_hostname }}_output.txt"

'''
RETURN = '''
  return value: |
    On successful execution, the method returns a message in JSON format
    [Switch Startup Config is Reset to factory settings]
    Upon any failure, the method returns an error display string.

'''


import sys
import paramiko
import time
import argparse
import socket
import array
import json
import time
import re
try:
    from ansible.module_utils 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 erase \n"
    outputfile = module.params['outputfile']
    hostIP = module.params['host']
    deviceType = module.params['deviceType']
    output = ""

    # 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, "[n]", 2, remote_conn)

    output = output + cnos.waitForDeviceResponse("y" + "\n", "#", 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 Startup Config is Reset to factory settings ")
    else:
        module.fail_json(msg=errorMsg)

if __name__ == '__main__':
    main()