#
#    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.
"""
Utils for testing the API service.
"""

import datetime
import hashlib
import json

from oslo_utils import timeutils

from ironic.api.controllers.v1 import allocation as al_controller
from ironic.api.controllers.v1 import chassis as chassis_controller
from ironic.api.controllers.v1 import deploy_template as dt_controller
from ironic.api.controllers.v1 import node as node_controller
from ironic.api.controllers.v1 import port as port_controller
from ironic.api.controllers.v1 import portgroup as portgroup_controller
from ironic.api.controllers.v1 import runbook as rb_controller
from ironic.api.controllers.v1 import utils as api_utils
from ironic.api.controllers.v1 import volume_connector as vc_controller
from ironic.api.controllers.v1 import volume_target as vt_controller
from ironic.tests.unit.db import utils as db_utils

ADMIN_TOKEN = '4562138218392831'
MEMBER_TOKEN = '4562138218392832'

ADMIN_BODY = {
    'access': {
        'token': {'id': ADMIN_TOKEN,
                  'expires': '2100-09-11T00:00:00'},
        'user': {'id': 'user_id1',
                 'name': 'user_name1',
                 'tenantId': '123i2910',
                 'tenantName': 'mytenant',
                 'roles': [{'name': 'admin'}]},
    }
}

MEMBER_BODY = {
    'access': {
        'token': {'id': MEMBER_TOKEN,
                  'expires': '2100-09-11T00:00:00'},
        'user': {'id': 'user_id2',
                 'name': 'user-good',
                 'tenantId': 'project-good',
                 'tenantName': 'goodies',
                 'roles': [{'name': 'Member'}]},
    }
}

DEFAULT_CACHE_VALUES = {
    ADMIN_TOKEN: ADMIN_BODY,
    MEMBER_TOKEN: MEMBER_BODY
}


class FakeMemcache(object):
    """Fake cache that is used for keystone tokens lookup."""

    def __init__(self, cache_values=None):
        if not cache_values:
            cache_values = DEFAULT_CACHE_VALUES
        self._cache = {}
        for k, v in cache_values.items():
            self._cache['tokens/%s' % k] = v
            # NOTE(lucasagomes): keystonemiddleware >= 2.0.0 the token cache
            # keys are sha256 hashes of the token key. This was introduced in
            # https://review.opendev.org/#/c/186971
            self._cache['tokens/%s' %
                        hashlib.sha256(k.encode()).hexdigest()] = v
        self.set_key = None
        self.set_value = None
        self.token_expiration = None

    def get(self, key):
        dt = timeutils.utcnow() + datetime.timedelta(minutes=5)
        return json.dumps((self._cache.get(key), dt.isoformat()))

    def set(self, key, value, time=0, min_compress_len=0):
        self.set_value = value
        self.set_key = key


def remove_internal(values, internal):
    # NOTE(yuriyz): internal attributes should not be posted, except uuid
    int_attr = [attr.lstrip('/') for attr in internal if attr != '/uuid']
    return {k: v for (k, v) in values.items() if k not in int_attr}


def remove_other_fields(values, allowed_fields):
    return {k: v for (k, v) in values.items() if k in allowed_fields}


def node_post_data(**kw):
    node = db_utils.get_test_node(**kw)

    # NOTE(jroll): pop out fields that were introduced in later API versions,
    # unless explicitly requested. Otherwise, these will cause tests using
    # older API versions to fail.
    for field in api_utils.VERSIONED_FIELDS:
        if field not in kw:
            node.pop(field, None)

    return remove_other_fields(
        node, node_controller.node_schema()['properties'])


def port_post_data(**kw):
    port = db_utils.get_test_port(**kw)
    return remove_other_fields(port,
                               port_controller.PORT_SCHEMA['properties'])


def volume_connector_post_data(**kw):
    connector = db_utils.get_test_volume_connector(**kw)
    return remove_other_fields(connector,
                               vc_controller.CONNECTOR_SCHEMA['properties'])


def volume_target_post_data(**kw):
    target = db_utils.get_test_volume_target(**kw)
    return remove_other_fields(target,
                               vt_controller.TARGET_SCHEMA['properties'])


def chassis_post_data(**kw):
    chassis = db_utils.get_test_chassis(**kw)
    return remove_other_fields(
        chassis, chassis_controller.CHASSIS_SCHEMA['properties'])


def post_get_test_node(**kw):
    # NOTE(lucasagomes): When creating a node via API (POST)
    #                    we have to use chassis_uuid
    node = node_post_data(**kw)
    chassis = db_utils.get_test_chassis()
    node['chassis_uuid'] = kw.get('chassis_uuid', chassis['uuid'])
    return node


def portgroup_post_data(**kw):
    """Return a Portgroup object without internal attributes."""
    portgroup = db_utils.get_test_portgroup(**kw)

    # These values are not part of the API object
    portgroup.pop('version')
    portgroup.pop('node_id')

    # NOTE(jroll): pop out fields that were introduced in later API versions,
    # unless explicitly requested. Otherwise, these will cause tests using
    # older API versions to fail.
    new_api_ver_arguments = ['mode', 'properties']
    for arg in new_api_ver_arguments:
        if arg not in kw:
            portgroup.pop(arg)

    return remove_other_fields(
        portgroup, portgroup_controller.PORTGROUP_SCHEMA['properties'])


def post_get_test_portgroup(**kw):
    """Return a Portgroup object with appropriate attributes."""
    portgroup = portgroup_post_data(**kw)
    node = db_utils.get_test_node()
    portgroup['node_uuid'] = kw.get('node_uuid', node['uuid'])
    return portgroup


def allocation_post_data(node=None, **kw):
    """Return an Allocation object without internal attributes."""
    allocation = db_utils.get_test_allocation(**kw)
    if node:
        # This is not a database field, so it has to be handled explicitly
        allocation['node'] = node
    return remove_other_fields(
        allocation, al_controller.ALLOCATION_SCHEMA['properties'])


def deploy_template_post_data(**kw):
    """Return a DeployTemplate object without internal attributes."""
    template = db_utils.get_test_deploy_template(**kw)
    # These values are not part of the API object
    template.pop('version')
    # Remove internal attributes from each step.
    step_internal = api_utils.DEPLOY_STEP_SCHEMA['properties']
    template['steps'] = [remove_other_fields(step, step_internal)
                         for step in template['steps']]
    # Remove internal attributes from the template.
    return remove_other_fields(
        template, dt_controller.TEMPLATE_SCHEMA['properties'])


def runbook_post_data(**kw):
    """Return a Runbook object without internal attributes."""
    runbook = db_utils.get_test_runbook(**kw)
    # These values are not part of the API object
    runbook.pop('version')
    # Remove internal attributes from each step.
    step_internal = api_utils.RUNBOOK_STEP_SCHEMA['properties']
    runbook['steps'] = [remove_other_fields(step, step_internal)
                        for step in runbook['steps']]
    # Remove internal attributes from the runbook.
    return remove_other_fields(
        runbook, rb_controller.RUNBOOK_SCHEMA['properties'])


def post_get_test_deploy_template(**kw):
    """Return a DeployTemplate object with appropriate attributes."""
    return deploy_template_post_data(**kw)


def post_get_test_runbook(**kw):
    """Return a Runbook object with appropriate attributes."""
    return runbook_post_data(**kw)


def inspection_rule_post_data(**kw):
    """Return a Inspection Rule object"""
    inspection_rule = db_utils.get_test_inspection_rule(**kw)
    inspection_rule.pop('version')
    return inspection_rule


def post_get_test_inspection_rule(**kw):
    """Return a Inspection Rule object"""
    return inspection_rule_post_data(**kw)
