# 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 mounting virtual media for 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 mount_virtual_media_iso(_redfishobj, iso_url, media_type, boot_on_next_server_reset):

    virtual_media_uri = None
    virtual_media_response = []

    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)
        virtual_media_uri = managers_members_response.obj['VirtualMedia']['@odata.id']
    else:
        for instance in resource_instances:
            #Use Resource directory to find the relevant URI
            if '#VirtualMediaCollection.' in instance['@odata.type']:
                virtual_media_uri = instance['@odata.id']

    if virtual_media_uri:
        virtual_media_response = _redfishobj.get(virtual_media_uri)
        for virtual_media_slot in virtual_media_response.obj['Members']:
            data = _redfishobj.get(virtual_media_slot['@odata.id'])
            if media_type in data.dict['MediaTypes']:
                virtual_media_mount_uri = data.obj['Actions']['#VirtualMedia.InsertMedia']['target']
                post_body = {"Image": iso_url}

                if iso_url:
                    resp = _redfishobj.post(virtual_media_mount_uri, post_body)
                    if boot_on_next_server_reset is not None:
                        patch_body = {}
                        patch_body["Oem"] = {"Hpe": {"BootOnNextServerReset": \
                                                 boot_on_next_server_reset}}
                        boot_resp = _redfishobj.patch(data.obj['@odata.id'], patch_body)
                        if not boot_resp.status == 200:
                            sys.stderr.write("Failure setting BootOnNextServerReset")
                    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))
                break

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"

    MEDIA_URL = "http://<SERVER_URL>/media.iso"
    #specify the type of content the media represents
    MEDIA_TYPE = "CD" #current possible options: Floppy, USBStick, CD, DVD
    #specify if the server should attempt to boot this media on system restart
    BOOT_ON_NEXT_SERVER_RESET = 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()

    mount_virtual_media_iso(REDFISHOBJ, MEDIA_URL, MEDIA_TYPE, BOOT_ON_NEXT_SERVER_RESET)
    REDFISHOBJ.logout()