 # Copyright 2020 Hewlett Packard Enterprise Development LP
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
 # not use this file except in compliance with the License. You may obtain
 # a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.

# -*- coding: utf-8 -*-
"""
An example of enabling NTP servers on HPE iLO systems
"""

import sys
import json
from redfish import RedfishClient
from redfish.rest.v1 import ServerDownOrUnreachableError

from get_resource_directory import get_resource_directory

def enable_ntp(_redfishobj, ntp_servers, DISABLE_RESOURCE_DIR):

    ethernet_data = {}

    resource_instances = get_resource_directory(_redfishobj)
    if DISABLE_RESOURCE_DIR or not resource_instances:
        #if we do not have a resource directory or want to force it's non use to find the
        #relevant URI
        managers_uri = _redfishobj.root.obj['Managers']['@odata.id']
        managers_response = _redfishobj.get(managers_uri)
        managers_members_uri = next(iter(managers_response.obj['Members']))['@odata.id']
        managers_members_response = _redfishobj.get(managers_members_uri)
        manager_ethernet_interfaces = managers_members_response.obj['EthernetInterfaces']\
                                                                                    ['@odata.id']
        manager_ethernet_interfaces_response = _redfishobj.get(manager_ethernet_interfaces)
        manager_ethernet_interfaces_members = manager_ethernet_interfaces_response.\
                                                            obj['Members']
        for _member in manager_ethernet_interfaces_members:
            _tmp = _redfishobj.get(_member['@odata.id']).obj
            ethernet_data[_member['@odata.id']] = _tmp
    else:
        #Use Resource directory to find the relevant URI
        for instance in resource_instances:
            if '#EthernetInterfaceCollection.' in instance['@odata.type'] and 'Managers' in \
                                                                        instance['@odata.id']:
                ethernet_uri = instance['@odata.id']
                ethernet_interfaces = _redfishobj.get(ethernet_uri).obj['Members']
                for _ethernet_interface in ethernet_interfaces:
                    ethernet_data[_ethernet_interface['@odata.id']] = _redfishobj.\
                                                        get(_ethernet_interface['@odata.id']).dict
                break

    if ethernet_data:
        print("\n\nShowing all available ethernet management interfaces before changes:\n\n")
        print(json.dumps(ethernet_data, indent=4, sort_keys=True))

    body = {"Oem": {"Hpe": {"DHCPv4": {"UseNTPServers": ntp_servers}, \
                            "DHCPv6": {"UseNTPServers": ntp_servers}}}}
    for ethernet in ethernet_data:
        resp = _redfishobj.patch(ethernet, body)
        if resp.status == 400:
            try:
                print(json.dumps(resp.obj['error']['@Message.ExtendedInfo'], indent=4, \
                                                                                sort_keys=True))
            except Exception as excp:
                sys.stderr.write("A response error occurred, unable to access iLO Extended "\
                                 "Message Info...")
        elif resp.status != 200:
            sys.stderr.write("An http response of \'%s\' was returned.\n" % resp.status)
        else:
            print("Success!\n")
            print(json.dumps(resp.dict, indent=4, sort_keys=True))
            _data = _redfishobj.get(ethernet).dict
            sys.stdout.write("\nShowing \'%s\' interface after changes:\n" % ethernet)
            print(json.dumps(_data, indent=4, sort_keys=True))

if __name__ == "__main__":
    # When running on the server locally use the following commented values
    #SYSTEM_URL = None
    #LOGIN_ACCOUNT = None
    #LOGIN_PASSWORD = None

    # When running remotely connect using the secured (https://) address,
    # account name, and password to send https requests
    # SYSTEM_URL acceptable examples:
    # "https://10.0.0.100"
    # "https://ilo.hostname"
    SYSTEM_URL = "https://10.0.0.100"
    LOGIN_ACCOUNT = "admin"
    LOGIN_PASSWORD = "password"

    # Properties
    # NTP Servers Enable/Disable Flag
    NTP_SERVERS = True
    # flag to force disable resource directory. Resource directory and associated operations are
    # intended for HPE servers.
    DISABLE_RESOURCE_DIR = False

    try:
        # Create a Redfish client object
        REDFISHOBJ = RedfishClient(base_url=SYSTEM_URL, username=LOGIN_ACCOUNT, \
                                                                            password=LOGIN_PASSWORD)
        # Login with the Redfish client
        REDFISHOBJ.login()
    except ServerDownOrUnreachableError as excp:
        sys.stderr.write("ERROR: server not reachable or does not support RedFish.\n")
        sys.exit()

    enable_ntp(REDFISHOBJ, NTP_SERVERS, DISABLE_RESOURCE_DIR)
    REDFISHOBJ.logout()
