# Copyright (C) 2005-2024 Splunk Inc. All Rights Reserved.

import json
import traceback
import http.client

from itsi_py3 import _ # noqa
import itsi_py3 # noqa

import splunk.rest as rest
from ITOA.setup_logging import getLogger
from ITOA.saved_search_utility import SavedSearch
from ITOA.storage.itoa_storage import ITOAStorage
from itsi.itsi_utils import SplunkMessageHandler


class ItsiEventGrouping(object):

    def __init__(self, session_key, features):
        self.logger = getLogger(logger_name='itsi.feature_flagging.UIViewAccessEnforcer')
        self.session_key = session_key
        self.features = features
        self.RULE_ENGINE_MESSAGE_ID = 'RULE_ENGINE_MESSAGE_ID'
        self.rules_engine_saved_search = SavedSearch.get_search(
            self.session_key, 'itsi_event_grouping')
        self.EVENT_GROUPING_URL = '/saved/searches/itsi_event_grouping?output_mode=json'
        self.EVENTGROUP_COLLECTION = "/servicesNS/nobody/SA-ITOA/storage/collections/data/itsi_event_grouping_status/"
        self.EVENT_GROUPING_OBJECT_URL = self.EVENTGROUP_COLLECTION + "itsi_event_grouping"

    def manage_disable_or_enable(self):
        if (self.features.get('itsi_event_grouping')):
            if self._check_kv_store_value():
                self._enable_rule_engine()
                self._set_itsi_event_grouping_flag_status(False)
                self._delete_message_for_rule_engine_state()
        else:
            try:
                response, contents = rest.simpleRequest(
                    path=self.EVENT_GROUPING_URL,
                    sessionKey=self.session_key)
                data = json.loads(contents)
                disabled = data['entry'][0]["content"]['disabled']
                if not disabled:
                    self._generate_message_for_rule_engine_state()
                    self._disable_rule_engine()
                if not self._check_kv_store_value():
                    self._set_itsi_event_grouping_flag_status(True)
            except Exception:
                self.logger.error("Failed to accesss EVENT_GROUPING_URL {}".format(traceback.format_exc()))
                raise

    def _disable_rule_engine(self):
        try:
            self.rules_engine_saved_search['disabled'] = 1
            SavedSearch.save_entity(self.session_key,
                                    self.rules_engine_saved_search)
            self.logger.info("Rule engine disabled")
        except Exception:
            self.logger.error("Failed to disable rule engine: {}".format(traceback.format_exc()))
            raise

    def _enable_rule_engine(self):
        try:
            self.rules_engine_saved_search['disabled'] = 0
            SavedSearch.save_entity(self.session_key,
                                    self.rules_engine_saved_search)
            self.logger.info("Rule engine enabled")
        except Exception:
            self.logger.error("Failed to enable rule engine: {}".format(traceback.format_exc()))
            raise

    def _check_itsi_event_grouping_flag_status(self):
        try:
            response, contents = rest.simpleRequest(
                path=self.EVENT_GROUPING_OBJECT_URL,
                sessionKey=self.session_key)
            contents = json.loads(contents)
            return contents["itsi_event_grouping_flag_value"]
        except Exception:
            self.logger.error("Unable to check itsi_event_grouping_flag_value flag \
            status from api : {}".format(traceback.format_exc()))
            raise

    def _check_kv_store_value(self):
        try:
            if ITOAStorage().wait_for_storage_init(self.session_key):
                response, contents = rest.simpleRequest(
                    path=self.EVENTGROUP_COLLECTION,
                    sessionKey=self.session_key)
                contents = json.loads(contents)
                if not contents:
                    response_obj, contents_obj = rest.simpleRequest(
                        path=self.EVENTGROUP_COLLECTION,
                        method="POST",
                        jsonargs=json.dumps({
                            "itsi_event_grouping_flag_value": True,
                            "_key": "itsi_event_grouping"
                        }),
                        sessionKey=self.session_key)
                    self.logger.info("itsi_event_grouping collection found empty posted \
                    object with itsi_event_grouping_flag_value:{}".format(True))
                return self._check_itsi_event_grouping_flag_status()
        except Exception:
            self.logger.error("Unable to add object to collection \
                itsi_event_grouping_status : {}".format(traceback.format_exc()))
            raise

    def _set_itsi_event_grouping_flag_status(self, status):
        """
        This method maintains the state of itsi_event_grouping functionality. This method sets
        itsi_event_grouping_flag_value to True or False on the basis of suite_state.
        When user is in standard suite the flag itsi_event_grouping_flag_value will set to True.
        When user is in Plus suite the itsi_event_grouping_flag_value value will set to False.
        """
        response, contents = rest.simpleRequest(
            path=self.EVENT_GROUPING_OBJECT_URL,
            method="POST",
            jsonargs=json.dumps({"itsi_event_grouping_flag_value": status}),
            sessionKey=self.session_key)

        if response.status == http.client.OK:
            self.logger.info(
                "Itsi_event_grouping flag status set to: " + str(status))
            return

        e = Exception(
            "Failed to set itsi_event_grouping  status to {}. Response={}".
            format(status, response))
        self.logger.exception(e)
        raise e

    def _generate_message_for_rule_engine_state(self):
        messages = SplunkMessageHandler(self.session_key)
        try:
            message_text = _(
                "The 'itsi_event_grouping' search is disabled for IT Essentials Work. \
                Enabling the search might cause an error.")
            self.logger.info(message_text)
            messages.post_or_update_message(self.RULE_ENGINE_MESSAGE_ID,
                                            SplunkMessageHandler.INFO,
                                            message_text)
        except Exception:
            self.logger.error("unable to generate message about itsi_event_grouping status")

    def _delete_message_for_rule_engine_state(self):
        messages = SplunkMessageHandler(self.session_key)
        try:
            messages.delete_message(self.RULE_ENGINE_MESSAGE_ID)
        except Exception:
            # the message might be already deleted by user
            pass