/*-
 * ============LICENSE_START=======================================================
 * ONAP : APPC
 * ================================================================================
 * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Copyright (C) 2017 Amdocs
 * =============================================================================
 * 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.
 * 
 * ============LICENSE_END=========================================================
 */

package org.onap.appc.dg.common.impl;

import java.util.Map;
import org.apache.commons.lang3.StringUtils;
import org.onap.appc.srvcomm.messaging.event.EventSenderInterface;
import org.onap.appc.srvcomm.messaging.MessageDestination;
import org.onap.appc.srvcomm.messaging.event.EventHeader;
import org.onap.appc.srvcomm.messaging.event.EventMessage;
import org.onap.appc.srvcomm.messaging.event.EventStatus;
import org.onap.appc.dg.common.DCAEReporterPlugin;
import org.onap.appc.exceptions.APPCException;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;

public class DCAEReporterPluginImpl implements DCAEReporterPlugin {

    private static final String ATTR_API_VERSION = "input.common-header.api-ver";
    private static final String ATTR_REQUEST_ID = "input.common-header.request-id";
    private static final String PARAM_EVENT_TOPIC_NAME = "event-topic-name";
    private EventSenderInterface eventSender;

    public DCAEReporterPluginImpl() {
        // do nothing
    }

    /**
     * Injected by blueprint
     *
     * @param eventSender to be set
     */
    public void setEventSender(EventSenderInterface eventSender) {
        this.eventSender = eventSender;
    }

    @Override
    public void report(Map<String, String> params, SvcLogicContext ctx) throws APPCException {
        String errorDescription;
        String apiVersion;
        String eventId;

        Integer errorCode = readErrorCode(params, ctx);
        errorDescription = params.get(Constants.EVENT_MESSAGE);

        if (StringUtils.isEmpty(errorDescription)) {
            reportLegacy(params, ctx);
        } else {
            apiVersion = ctx.getAttribute(ATTR_API_VERSION);
            eventId = ctx.getAttribute(ATTR_REQUEST_ID);

            EventMessage eventMessage = new EventMessage(new EventHeader(
                (new java.util.Date()).toString(), apiVersion, eventId),
                new EventStatus(errorCode, errorDescription));
            String eventWriteTopic = params.get(PARAM_EVENT_TOPIC_NAME);
            if (!StringUtils.isEmpty(eventWriteTopic) && eventWriteTopic != null) {
                eventSender.sendEvent(MessageDestination.DCAE, eventMessage, eventWriteTopic);
            } else {
                eventSender.sendEvent(MessageDestination.DCAE, eventMessage);
            }
        }
    }

    private Integer readErrorCode(Map<String, String> params, SvcLogicContext ctx) {
        Integer errorReportCode = 501;
        String errorCodeStr = params.get(Constants.DG_ERROR_CODE);
        errorCodeStr = StringUtils.isEmpty(errorCodeStr) ?
            ctx.getAttribute(Constants.DG_ERROR_CODE) : errorCodeStr;
        try {
            errorReportCode = Integer.parseInt(errorCodeStr);
        } catch (NumberFormatException e) {
            // Ignore Exception
        }
        return errorReportCode;
    }

    @Override
    public void reportSuccess(Map<String, String> params, SvcLogicContext ctx) throws APPCException {
        Integer successReportCode = 500;
        String successDescription;
        String apiVersion;
        String eventId;

        successDescription = params.get(Constants.EVENT_MESSAGE);

        if (StringUtils.isEmpty(successDescription)) {
            successDescription = params.get(Constants.DG_OUTPUT_STATUS_MESSAGE);
        }

        apiVersion = ctx.getAttribute(ATTR_API_VERSION);
        eventId = ctx.getAttribute(ATTR_REQUEST_ID);

        if (null == successDescription) {
            successDescription = "Success";
        }
        EventMessage eventMessage = new EventMessage(new EventHeader(
            (new java.util.Date()).toString(), apiVersion, eventId),
            new EventStatus(successReportCode, successDescription));
        String eventWriteTopic = params.get(PARAM_EVENT_TOPIC_NAME);
        if (!StringUtils.isEmpty(eventWriteTopic) && eventWriteTopic != null) {
            eventSender.sendEvent(MessageDestination.DCAE, eventMessage, eventWriteTopic);
        } else {
            eventSender.sendEvent(MessageDestination.DCAE, eventMessage);
        }
    }

    private void reportLegacy(Map<String, String> params, SvcLogicContext ctx) throws APPCException {
        String errorDescription;
        String apiVersion;
        String eventId;

        Integer errorCode = readErrorCode(params, ctx);
        errorDescription = getErrorDescriptionAndAddToCtx(params, ctx);

        apiVersion = ctx.getAttribute(ATTR_API_VERSION);
        eventId = ctx.getAttribute(ATTR_REQUEST_ID);

        EventMessage eventMessage = new EventMessage(new EventHeader(
            (new java.util.Date()).toString(), apiVersion, eventId),
            new EventStatus(errorCode, errorDescription));
        String eventWriteTopic = params.get(PARAM_EVENT_TOPIC_NAME);
        if (!StringUtils.isEmpty(eventWriteTopic) && eventWriteTopic != null) {
            eventSender.sendEvent(MessageDestination.DCAE, eventMessage, eventWriteTopic);
        } else {
            eventSender.sendEvent(MessageDestination.DCAE, eventMessage);
        }
    }

    private String getErrorDescriptionAndAddToCtx(Map<String, String> params, SvcLogicContext ctx) {
        String errorDescription;
        errorDescription = params.get(Constants.DG_OUTPUT_STATUS_MESSAGE);

        if (StringUtils.isEmpty(errorDescription)) {
            errorDescription = ctx.getAttribute(Constants.DG_OUTPUT_STATUS_MESSAGE);
        }
        if (StringUtils.isEmpty(errorDescription)) {
            errorDescription = "Unknown";
        }
        addToContextIfNotContains(errorDescription, ctx);
        return errorDescription;
    }

    private void addToContextIfNotContains(String errorDescription, SvcLogicContext ctx) {
        String errorDescriptionFromCtx;
        errorDescriptionFromCtx = ctx.getAttribute(Constants.DG_OUTPUT_STATUS_MESSAGE);
        if (StringUtils.isEmpty(errorDescriptionFromCtx)) {
            errorDescriptionFromCtx = ctx.getAttribute(Constants.ATTRIBUTE_ERROR_MESSAGE);
        }
        if (StringUtils.isEmpty(errorDescriptionFromCtx)) {
            ctx.setAttribute(Constants.DG_OUTPUT_STATUS_MESSAGE, errorDescription);
        } else if (!errorDescriptionFromCtx.contains(errorDescription)) {
            ctx.setAttribute(Constants.DG_OUTPUT_STATUS_MESSAGE, errorDescriptionFromCtx + " | " + errorDescription);
        }
    }
}