# By: Riasat Ullah
# This file contains Rollbar integration related views.

from data_syncers import syncer_services, syncer_task_instances
from dbqueries import db_integrations
from exceptions.user_exceptions import InvalidRequest
from integrations import rollbar
from modules.router import Router
from objects.events import ResolveEvent, UrgencyAmendmentEvent
from objects.task_payload import TaskPayload
from rest_framework.decorators import api_view
from rest_framework.response import Response
from translators import label_translator as _lt
from utils import constants, errors, info, key_manager, logging, times, var_names
from utils.db_connection import CACHE_CLIENT, CONN_POOL
from validations import request_validator
import configuration


@api_view(['POST'])
def process_incoming_webhook(request, integration_key, conn=None, cache=None):
    '''
    Processes the incoming webhook from LogRocket.
    :param request: Http request
    :param integration_key: integration key passed in the url
    :param conn: db connection
    :param cache: cache client
    :return: Http response
    '''
    if request.method == 'POST':
        lang = request_validator.get_user_language(request)
        try:
            conn = CONN_POOL.get_db_conn() if conn is None else conn
            cache = CACHE_CLIENT if cache is None else cache

            unmasked_integ_key = key_manager.unmask_reference_key(integration_key)

            alert_event_name = request.data[rollbar.var_event_name]
            alert_data_item = request.data[rollbar.var_data][rollbar.var_item]

            alert_id = alert_data_item[rollbar.var_item_id]
            alert_status = alert_data_item[rollbar.var_item_status]
            alert_title = alert_data_item[rollbar.var_item_title]
            alert_body = rollbar.get_rollbar_incident_description(request.data, alert_event_name)
            alert_level = alert_data_item[rollbar.var_item_level]
            urgency = rollbar.severity_mapping[alert_level]

            current_time = times.get_current_timestamp()
            integ_id, serv_id, org_id = syncer_services.get_integration_key_details(
                conn, cache, current_time, unmasked_integ_key)

            integ_insts = db_integrations.get_integration_open_instances_trigger_info(
                conn, current_time, org_id, serv_id, integ_id)

            match_count = 0
            for inst_id, task_id, trig_info in integ_insts:
                if trig_info is not None:
                    source_data = trig_info[var_names.source_payload][rollbar.var_data]
                    if source_data[rollbar.var_item][rollbar.var_item_id] == alert_id:
                        match_count += 1

                        # Group the alert if one already exists
                        if alert_status == rollbar.active_status:
                            source_alert_level = source_data[rollbar.var_item][rollbar.var_item_level]
                            if source_alert_level == alert_level:
                                payload = TaskPayload(
                                    current_time, org_id, current_time.date(), alert_title,
                                    configuration.standard_timezone, current_time.time(), text_msg=alert_body,
                                    urgency_level=urgency, trigger_method=constants.integrations_api,
                                    trigger_info=request.data, integration_id=integ_id, integration_key=integration_key,
                                    service_id=serv_id, instantiate=False, alert=False, related_task_id=task_id,
                                    task_status=constants.grouped_state
                                )
                                Router(conn, cache, payload).start()
                            else:
                                event = UrgencyAmendmentEvent(inst_id, current_time, constants.integrations_api,
                                                              rollbar.severity_mapping[alert_level])
                                syncer_task_instances.amend_urgency(conn, cache, [event], org_id, is_sys_action=True)
                        elif alert_status == rollbar.resolved_status:
                            event = ResolveEvent(inst_id, current_time, constants.integrations_api)
                            syncer_task_instances.resolve(conn, cache, event, org_id, is_sys_action=True)

                        break

            # Create a new task if this is a new alert.
            if match_count == 0 and alert_status == rollbar.active_status:
                payload = TaskPayload(
                    current_time, org_id, current_time.date(), alert_title, configuration.standard_timezone,
                    current_time.time(), text_msg=alert_body, urgency_level=urgency,
                    trigger_method=constants.integrations_api, trigger_info=request.data, integration_id=integ_id,
                    integration_key=integration_key, service_id=serv_id
                )
                Router(conn, cache, payload).start()

            return Response(info.msg_internal_success)
        except InvalidRequest as e:
            logging.exception(str(e))
            return Response(_lt.get_label(errors.err_invalid_request, lang), status=400)
        except Exception as e:
            logging.exception(str(e))
            return Response(_lt.get_label(errors.err_system_error, lang), status=500)
        finally:
            CONN_POOL.put_db_conn(conn)