/*-
 * ============LICENSE_START=======================================================
 * ONAP CLAMP
 * ================================================================================
 * Copyright (C) 2018-2019 AT&T Intellectual Property. All rights
 *                             reserved.
 * ================================================================================
 * 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============================================
 * Modifications copyright (c) 2018 Nokia
 * ===================================================================
 *
 */

package org.onap.clamp.clds.sdc.controller;

import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;

import java.util.Date;
import java.util.Map.Entry;
import java.util.concurrent.ThreadLocalRandom;

import org.onap.clamp.clds.config.ClampProperties;
import org.onap.clamp.clds.config.sdc.SdcSingleControllerConfiguration;
import org.onap.clamp.clds.exception.policy.PolicyModelException;
import org.onap.clamp.clds.exception.sdc.controller.CsarHandlerException;
import org.onap.clamp.clds.exception.sdc.controller.SdcArtifactInstallerException;
import org.onap.clamp.clds.exception.sdc.controller.SdcControllerException;
import org.onap.clamp.clds.exception.sdc.controller.SdcDownloadException;
import org.onap.clamp.clds.exception.sdc.controller.SdcParametersException;
import org.onap.clamp.clds.sdc.controller.installer.BlueprintArtifact;
import org.onap.clamp.clds.sdc.controller.installer.CsarHandler;
import org.onap.clamp.clds.sdc.controller.installer.CsarInstaller;
import org.onap.clamp.clds.util.LoggingUtils;
import org.onap.sdc.api.IDistributionClient;
import org.onap.sdc.api.consumer.IDistributionStatusMessage;
import org.onap.sdc.api.consumer.INotificationCallback;
import org.onap.sdc.api.notification.IArtifactInfo;
import org.onap.sdc.api.notification.INotificationData;
import org.onap.sdc.api.results.IDistributionClientDownloadResult;
import org.onap.sdc.api.results.IDistributionClientResult;
import org.onap.sdc.impl.DistributionClientFactory;
import org.onap.sdc.tosca.parser.exceptions.SdcToscaParserException;
import org.onap.sdc.utils.DistributionActionResultEnum;
import org.onap.sdc.utils.DistributionStatusEnum;

/**
 * This class handles one sdc controller defined in the config.
 */
public class SdcSingleController {

    private static final EELFLogger logger = EELFManager.getInstance().getLogger(SdcSingleController.class);
    private boolean isSdcClientAutoManaged = false;
    private CsarInstaller csarInstaller;
    private ClampProperties refProp;
    /**
     * The constant CONFIG_SDC_FOLDER.
     */
    public static final String CONFIG_SDC_FOLDER = "sdc.csarFolder";
    private int nbOfNotificationsOngoing = 0;
    private SdcSingleControllerStatus controllerStatus = SdcSingleControllerStatus.STOPPED;
    private SdcSingleControllerConfiguration sdcConfig;
    private IDistributionClient distributionClient;

    /**
     * Inner class for Notification callback.
     */
    private final class SdcNotificationCallBack implements INotificationCallback {

        private SdcSingleController sdcController;

        /**
         * Instantiates a new Sdc notification call back.
         *
         * @param controller the controller
         */
        SdcNotificationCallBack(SdcSingleController controller) {
            sdcController = controller;
        }

        /**
         * This method can be called multiple times at the same moment. The controller
         * must be thread safe !
         */
        @Override
        public void activateCallback(INotificationData notificationData) {
            Date startTime = new Date();
            logger.info("Receive a callback notification in SDC, nb of resources: "
                    + notificationData.getResources().size());
            sdcController.treatNotification(notificationData);
            LoggingUtils.setTimeContext(startTime, new Date());
            LoggingUtils.setResponseContext("0", "SDC Notification received and processed successfully",
                    this.getClass().getName());
        }
    }

    /**
     * Gets nb of notifications ongoing.
     *
     * @return the nb of notifications ongoing
     */
    public int getNbOfNotificationsOngoing() {
        return nbOfNotificationsOngoing;
    }

    private void changeControllerStatusIdle() {
        if (this.nbOfNotificationsOngoing > 1) {
            --this.nbOfNotificationsOngoing;
        } else {
            this.nbOfNotificationsOngoing = 0;
            this.controllerStatus = SdcSingleControllerStatus.IDLE;
        }
    }

    /**
     * Change controller status.
     *
     * @param newControllerStatus the new controller status
     */
    protected final synchronized void changeControllerStatus(SdcSingleControllerStatus newControllerStatus) {
        switch