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/*-
 * ============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.servlets;

import javax.annotation.Resource;
import javax.inject.Singleton;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.openecomp.sdc.be.components.impl.DistributionMonitoringBusinessLogic;
import org.openecomp.sdc.be.config.BeEcompErrorManager;
import org.openecomp.sdc.be.dao.api.ActionStatus;
import org.openecomp.sdc.be.impl.WebAppContextWrapper;
import org.openecomp.sdc.be.info.DistributionStatusListResponse;
import org.openecomp.sdc.be.info.DistributionStatusOfServiceListResponce;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.config.EcompErrorName;
import org.openecomp.sdc.exception.ResponseFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.context.WebApplicationContext;

import com.jcabi.aspects.Loggable;

import fj.data.Either;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;

/**
 * Root resource (exposed at "/" path)
 */
@Loggable(prepend = true, value = Loggable.DEBUG, trim = false)
@Path("/v1/catalog")
@Api(value = "Distribution Service Servlet", description = "Distribution Service Servlet")
@Singleton
public class DistributionServiceServlet extends BeGenericServlet {
	private static Logger log = LoggerFactory.getLogger(DistributionServiceServlet.class.getName());

	@Resource
	private DistributionMonitoringBusinessLogic distributionMonitoringLogic;

	@GET
	@Path("/services/{serviceUUID}/distribution")
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@ApiOperation(value = "Retrieve Distributions", httpMethod = "GET", notes = "Returns list  bases on the  information extracted from  Auditing Records according to service uuid", response = DistributionStatusListResponse.class)
	@ApiResponses(value = { @ApiResponse(code = 200, message = "Service found"), @ApiResponse(code = 403, message = "Restricted operation"), @ApiResponse(code = 404, message = "Service not found") })
	public Response getServiceById(@PathParam("serviceUUID") final String serviceUUID, @Context final HttpServletRequest request, @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {

		init(request);
		String url = request.getMethod() + " " + request.getRequestURI();
		log.debug("Start handle request of {}", url);
		Response response = null;
		ResponseFormat responseFormat = null;

		try {
			Either<DistributionStatusOfServiceListResponce, ResponseFormat> actionResponse = distributionMonitoringLogic.getListOfDistributionServiceStatus(serviceUUID, userId);

			if (actionResponse.isRight()) {

				responseFormat = actionResponse.right().value();
				response = buildErrorResponse(responseFormat);
			} else {
				responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.OK);
				response = buildOkResponse(responseFormat, actionResponse.left().value());

			}

			return response;

		} catch (Exception e) {
			BeEcompErrorManager.getInstance().processEcompError(EcompErrorName.BeRestApiGeneralError, "Get Distribution list for Service");
			BeEcompErrorManager.getInstance().logBeRestApiGeneralError("Get Distribution list for Service");
			log.debug("failed to get service distribution statuses", e);
			responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR);

			response = buildErrorResponse(responseFormat);
			return response;
		}

	}

	@GET
	@Path("/services/distribution/{did}")
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	@ApiOperation(value = "Retrieve Distributions", httpMethod = "GET", notes = "Return  the  list  of  distribution status objects", response = DistributionStatusListResponse.class)
	@ApiResponses(value = { @ApiResponse(code = 200, message = "Service found"), @ApiResponse(code = 403, message = "Restricted operation"), @ApiResponse(code = 404, message = "Status not found") })
	public Response getListOfDistributionStatuses(@PathParam("did") final String did, @Context final HttpServletRequest request, @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {

		init(request);
		String url = request.getMethod() + " " + request.getRequestURI();
		log.debug("Start handle request of {}", url);
		Response response = null;
		ResponseFormat responseFormat = null;

		try {
			Either<DistributionStatusListResponse, ResponseFormat> actionResponse = distributionMonitoringLogic.getListOfDistributionStatus(did, userId);

			if (actionResponse.isRight()) {

				responseFormat = actionResponse.right().value();
				log.debug("failed to fount statuses for did {} {}", did, responseFormat);
				response = buildErrorResponse(responseFormat);
			} else {

				responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.OK);
				log.debug("success to fount statuses for did {} {}", did, actionResponse.left().value());
				response = buildOkResponse(responseFormat, actionResponse.left().value());

			}

			return response;

		} catch (Exception e) {
			BeEcompErrorManager.getInstance().processEcompError(EcompErrorName.BeRestApiGeneralError, "Get Distribution Status");
			BeEcompErrorManager.getInstance().logBeRestApiGeneralError("Get Distribution Status");
			log.debug("failed to get distribution status ", e);
			responseFormat = getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR);

			response = buildErrorResponse(responseFormat);
			return response;
		}

	}

	private void init(HttpServletRequest request) {
		if (distributionMonitoringLogic == null) {
			distributionMonitoringLogic = getDistributionBL(request.getSession().getServletContext());
		}
	}

	private DistributionMonitoringBusinessLogic getDistributionBL(ServletContext context) {
		WebAppContextWrapper webApplicationContextWrapper = (WebAppContextWrapper) context.getAttribute(Constants.WEB_APPLICATION_CONTEXT_WRAPPER_ATTR);
		WebApplicationContext webApplicationContext = webApplicationContextWrapper.getWebAppContext(context);
		DistributionMonitoringBusinessLogic distributionBl = webApplicationContext.getBean(DistributionMonitoringBusinessLogic.class);
		return distributionBl;
	}

}