/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 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=========================================================
 */

package org.openecomp.sdc.be.components.impl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.http.HttpStatus;
import org.openecomp.sdc.be.dao.api.ActionStatus;
import org.openecomp.sdc.be.dao.cassandra.AuditCassandraDao;
import org.openecomp.sdc.be.impl.ComponentsUtils;
import org.openecomp.sdc.be.info.DistributionStatusInfo;
import org.openecomp.sdc.be.info.DistributionStatusListResponse;
import org.openecomp.sdc.be.info.DistributionStatusOfServiceInfo;
import org.openecomp.sdc.be.info.DistributionStatusOfServiceListResponce;
import org.openecomp.sdc.be.model.User;
import org.openecomp.sdc.be.resources.data.auditing.AuditingActionEnum;
import org.openecomp.sdc.be.resources.data.auditing.AuditingGenericEvent;
import org.openecomp.sdc.be.resources.data.auditing.DistributionStatusEvent;
import org.openecomp.sdc.common.datastructure.AuditingFieldsKeysEnum;
import org.openecomp.sdc.common.datastructure.ESTimeBasedEvent;
import org.openecomp.sdc.exception.ResponseFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import fj.data.Either;

@Component("distributionMonitoringBusinessLogic")
public class DistributionMonitoringBusinessLogic extends BaseBusinessLogic {
	private static final String DEPLOYED = "Deployed";

	private static final String ERROR = "Error";

	private static final String DISTRIBUTED = "Distributed";

	private static final String IN_PROGRESS = "In Progress";

	private static Logger log = LoggerFactory.getLogger(ArtifactsBusinessLogic.class.getName());

	// @javax.annotation.Resource
	// private AuditingDao auditingDao;

	@Autowired
	private AuditCassandraDao cassandraDao;

	@javax.annotation.Resource
	private ComponentsUtils componentsUtils;

	public DistributionMonitoringBusinessLogic() {
	}

	public Either<DistributionStatusListResponse, ResponseFormat> getListOfDistributionStatus(String did, String userId) {

		Either<User, ResponseFormat> resp = validateUserExists(userId, "get List Of Distribution Status", false);
		if (resp.isRight()) {
			return Either.right(resp.right().value());
		}

		log.trace("getListOfDistributionStatus for did {}", did);
		Either<List<DistributionStatusEvent>, ActionStatus> distributionStatus = cassandraDao.getListOfDistributionStatuses(did);
		if (distributionStatus.isRight()) {
			log.debug("not found distribution statuses for did {}   status is {} ", did, distributionStatus.right().value());
			return Either.right(componentsUtils.getResponseFormat(distributionStatus.right().value(), did));
		}
		List<DistributionStatusInfo> distribStatusInfoList = new ArrayList<DistributionStatusInfo>();
		List<DistributionStatusEvent> distributionStatusEventList = distributionStatus.left().value();
		if (distributionStatusEventList != null) {
			for (ESTimeBasedEvent distributionStatusEvent : distributionStatusEventList) {
				distribStatusInfoList.add(new DistributionStatusInfo(distributionStatusEvent));
			}
		}

		DistributionStatusListResponse distributionStatusListResponse = new DistributionStatusListResponse();
		distributionStatusListResponse.setDistributionStatusList(distribStatusInfoList);
		log.trace("list statuses for did {} is {} ", did, distribStatusInfoList);
		return Either.left(distributionStatusListResponse);
	}

	public Either<DistributionStatusOfServiceListResponce, ResponseFormat> getListOfDistributionServiceStatus(String serviceUuid, String userId) {
		Either<User, ResponseFormat> resp = validateUserExists(userId, "get List Of Distribution Service Status", false);
		if (resp.isRight()) {
			return Either.right(resp.right().value());
		}

		log.trace("getListOfDistributionServiceStatus for serviceUUID {}", serviceUuid);
		Either<List<? extends AuditingGenericEvent>, ActionStatus> status = cassandraDao.getServiceDistributionStatusesList(serviceUuid);
		if (status.isRight()) {
			log.debug("failed to find service distribution statuses. error: {}", status);
			return Either.right(componentsUtils.getResponseFormat(status.right().value(), serviceUuid));
		}
		List<DistributionStatusOfServiceInfo> distribStatusInfoList = new ArrayList<DistributionStatusOfServiceInfo>();
		List<? extends AuditingGenericEvent> distributionStatusEventList = status.left().value();
		distribStatusInfoList = handleAuditingDaoResponse(distributionStatusEventList);
		DistributionStatusOfServiceListResponce distributionStatusListResponse = new DistributionStatusOfServiceListResponce();
		distributionStatusListResponse.setDistributionStatusOfServiceList(distribStatusInfoList);
		return Either.left(distributionStatusListResponse);
	}

	private List<DistributionStatusOfServiceInfo> handleAuditingDaoResponse(List<? extends AuditingGenericEvent> distribStatusInfoList) {
		List<DistributionStatusOfServiceInfo> reslist = new ArrayList<DistributionStatusOfServiceInfo>();
		Map<String, List<AuditingGenericEvent>> serviceDidMap = createServiceDidMap(distribStatusInfoList);
		Set<String> didSet = serviceDidMap.keySet();
		for (String did : didSet) {
			DistributionStatusOfServiceInfo distributionStatusOfServiceInfo = new DistributionStatusOfServiceInfo();
			distributionStatusOfServiceInfo.setDistributionID(did);
			String dReguestStatus = "";
			String dNotifyStatus = "";
			boolean isResult = false;
			List<? extends AuditingGenericEvent> auditingGenericEventList = serviceDidMap.get(did);
			ESTimeBasedEvent resAuditingGenericEvent = null;
			for (AuditingGenericEvent auditingGenericEvent : auditingGenericEventList) {
				auditingGenericEvent.fillFields();

				String action = (String) auditingGenericEvent.getFields().get(AuditingFieldsKeysEnum.AUDIT_ACTION.getDisplayName());
				Object modifierUserId = auditingGenericEvent.getFields().get(AuditingFieldsKeysEnum.AUDIT_MODIFIER_UID.getDisplayName());
				if (modifierUserId != null) {
					distributionStatusOfServiceInfo.setUserId((String) modifierUserId);
				}

				if (action.equals(AuditingActionEnum.DISTRIBUTION_DEPLOY.getName())) {

					isResult = true;
					resAuditingGenericEvent = auditingGenericEvent;
					break;
				} else if (action.equals(AuditingActionEnum.DISTRIBUTION_STATE_CHANGE_REQUEST.getName())) {
					dReguestStatus = getStatusFromAuditEvent(auditingGenericEvent);
				} else if (action.equals(AuditingActionEnum.DISTRIBUTION_NOTIFY.getName())) {
					dNotifyStatus = getStatusFromAuditEvent(auditingGenericEvent);
				}

				resAuditingGenericEvent = auditingGenericEvent;

			}
			distributionStatusOfServiceInfo.setTimestamp((String) resAuditingGenericEvent.getFields().get(AuditingFieldsKeysEnum.AUDIT_TIMESTAMP.getDisplayName()));

			if (!isResult) {
				if (dReguestStatus.equals(String.valueOf(HttpStatus.SC_OK))) {
					if (dNotifyStatus.isEmpty()) {
						distributionStatusOfServiceInfo.setDeployementStatus(IN_PROGRESS);

					} else {
						if (dNotifyStatus.equals(String.valueOf(HttpStatus.SC_OK)))
							distributionStatusOfServiceInfo.setDeployementStatus(DISTRIBUTED);
						else
							distributionStatusOfServiceInfo.setDeployementStatus(ERROR);
					}
				} else
					distributionStatusOfServiceInfo.setDeployementStatus(ERROR);
			} else
				distributionStatusOfServiceInfo.setDeployementStatus(DEPLOYED);
			reslist.add(distributionStatusOfServiceInfo);
		}

		return reslist;
	}

	private String getStatusFromAuditEvent(ESTimeBasedEvent auditingGenericEvent) {
		String status = "";
		Object requestStatus = auditingGenericEvent.getFields().get(AuditingFieldsKeysEnum.AUDIT_STATUS.getDisplayName());
		if (requestStatus instanceof String) {
			status = (String) requestStatus;
		}
		return status;
	}

	private Map<String, List<AuditingGenericEvent>> createServiceDidMap(List<? extends AuditingGenericEvent> distribStatusInfoList) {

		Map<String, List<AuditingGenericEvent>> serviceDidMap = new HashMap<String, List<AuditingGenericEvent>>();
		for (AuditingGenericEvent auditingGenericEvent : distribStatusInfoList) {
			List<AuditingGenericEvent> auditingGenericEventList = null;
			String did = "";
			auditingGenericEvent.fillFields();

			Object didValue = auditingGenericEvent.getFields().get(AuditingFieldsKeysEnum.AUDIT_DISTRIBUTION_ID.getDisplayName());
			if (didValue != null) {
				did = (String) didValue;
			}

			if (!did.isEmpty()) {
				if (serviceDidMap.containsKey(did)) {
					auditingGenericEventList = serviceDidMap.get(did);
				}
				if (auditingGenericEventList == null) {
					auditingGenericEventList = new ArrayList();

				}
				auditingGenericEventList.add(auditingGenericEvent);
				serviceDidMap.put(did, auditingGenericEventList);
			}
		}
		return serviceDidMap;
	}

}