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/*-
 * ============LICENSE_START=======================================================
 * ONAP-PDP-REST
 * ================================================================================
 * Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
 * Modifications Copyright (C) 2018 Samsung Electronics Co., Ltd.
 * ================================================================================
 * 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.policy.pdp.rest.api.services;

import javax.json.JsonException;
import javax.json.JsonObject;

import org.onap.policy.api.PolicyException;
import org.onap.policy.api.PolicyParameters;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
import org.onap.policy.pdp.rest.api.utils.PolicyApiUtils;
import org.onap.policy.xacml.api.XACMLErrorConstants;
import org.onap.policy.xacml.std.pap.StdPAPPolicy;
import org.onap.policy.xacml.std.pap.StdPAPPolicyParams;

/**
 * Optimization Policy implementation.
 *
 * @version 0.1
 */
public class OptimizationPolicyService {
    private static final Logger LOGGER = FlexLogger.getLogger(OptimizationPolicyService.class.getName());

    private PAPServices papServices = null;
    private PolicyParameters policyParameters = null;
    private String message = null;
    private String policyName = null;
    private String policyScope = null;
    private String date = null;

    public OptimizationPolicyService(String policyName, String policyScope, PolicyParameters policyParameters,
                                     String date) {
        this.policyParameters = policyParameters;
        this.policyName = policyName;
        this.policyScope = policyScope;
        this.date = date;
        papServices = new PAPServices();
    }

    public String getMessage() {
        return message;
    }

    public String getResult(boolean updateFlag) throws PolicyException {
        String response = null;
        String operation = null;

        if (updateFlag) {
            operation = "update";
        } else {
            operation = "create";
        }

        // get values and attributes from the JsonObject
        String servicModel = null;
        String policyDescription = null;
        String priority = null;
        String version = null;

        String onapName = policyParameters.getOnapName();
        JsonObject optimizationAttributes = null;
        try {
            optimizationAttributes = PolicyApiUtils.stringToJsonObject(policyParameters.getConfigBody());
        } catch (JsonException | IllegalStateException e) {
            message =
                    XACMLErrorConstants.ERROR_DATA_ISSUE + " improper JSON object : " +
                            policyParameters.getConfigBody();
            LOGGER.error("Error while parsing JSON body for MicroService Policy creation. ", e);
            return null;
        }

        if (optimizationAttributes.get("service") != null) {
            servicModel = optimizationAttributes.get("service").toString().replace("\"", "");
        }
        if (optimizationAttributes.containsKey("description")) {
            policyDescription = optimizationAttributes.get("description").toString().replace("\"", "");
        }
        if (optimizationAttributes.containsKey("priority")) {
            priority = optimizationAttributes.get("priority").toString().replace("\"", "");
        }
        if (optimizationAttributes.containsKey("version")) {
            version = optimizationAttributes.get("version").toString().replace("\"", "");
        }

        // Create Policy Object 
        StdPAPPolicy newPAPPolicy = new StdPAPPolicy(StdPAPPolicyParams.builder()
                .configPolicyType("Optimization")
                .policyName(policyName)
                .description(policyDescription)
                .onapName(onapName)
                .configName(null)
                .serviceType(servicModel)
                .uuid(null)
                .msLocation(null)
                .jsonBody(optimizationAttributes.toString())
                .priority(priority)
                .version(version)
                .editPolicy(updateFlag)
                .domain(policyScope)
                .highestVersion(0)
                .riskLevel(policyParameters.getRiskLevel())
                .riskType(policyParameters.getRiskType())
                .guard(String.valueOf(policyParameters.getGuard()))
                .ttlDate(date)
                .build());

        // Send JSON Object to PAP 
        response = (String) papServices.callPAP(newPAPPolicy, new String[]{"operation=" + operation, "apiflag=api",
                        "policyType=Config"},
                policyParameters.getRequestID(), "ConfigOptimization");
        LOGGER.info("Response: " + response);
        return response;
    }
}