/*-
 * ============LICENSE_START=======================================================
 * ONAP : APPC
 * ================================================================================
 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Modifications Copyright (C) 2019 Ericsson
 * =============================================================================
 * 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.flow.controller.executorImpl;

import java.util.Enumeration;
import java.util.Map;
import java.util.Properties;
import org.onap.appc.flow.controller.data.Transaction;
import org.onap.appc.flow.controller.interfaces.FlowExecutorInterface;
import org.onap.appc.flow.controller.utils.FlowControllerConstants;
import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
import org.onap.ccsdk.sli.core.sli.SvcLogicException;
import org.onap.ccsdk.sli.core.sli.provider.SvcLogicService;
import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
import org.osgi.framework.ServiceReference;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;


public class GraphExecutor implements FlowExecutorInterface {

    private static EELFLogger log = EELFManager.getInstance().getLogger(GraphExecutor.class);
    static final String SVC_LOGIC_STATUS_PARAM = "SvcLogic.status";

    private SvcLogicService svcLogic = null;

    public GraphExecutor() {
        BundleContext bctx = FrameworkUtil.getBundle(SvcLogicService.class).getBundleContext();

        ServiceReference sref = bctx.getServiceReference(SvcLogicService.NAME);
        if (sref != null) {
            svcLogic = (SvcLogicService) bctx.getService(sref);
        } else {
            log.warn("Cannot find service reference for " + SvcLogicService.NAME);
        }
        log.debug("Graph Executor Initialized successfully");
    }

    public boolean hasGraph(String module, String rpc, String version, String mode) throws SvcLogicException {
        return svcLogic.hasGraph(module, rpc, version, mode);
    }

    public Properties executeGraph(String module, String rpc, String version, String mode, Properties parms)
        throws SvcLogicException {
        log.debug("Parameters passed to SLI");

        Properties respProps = svcLogic.execute(module, rpc, version, mode, parms);
        if (log.isDebugEnabled()) {
            log.debug("Parameters returned by SLI");
            for (Object key : respProps.keySet()) {
                String parmName = (String) key;
                String parmValue = respProps.getProperty(parmName);

                log.debug(parmName + " = " + parmValue);
            }
        }
        return respProps;
    }

    @Override
    public Map<String, String> execute(Transaction transaction, SvcLogicContext ctx) throws Exception {

        String fn = "GraphExecutor.execute ";
        log.debug(fn + "About to execute graph : " + transaction.getExecutionRPC());

        String payload = transaction.getPayload();
        log.debug("payload:" + payload);

        Properties parms = new Properties();
        for (Object key : ctx.getAttributeKeySet()) {
            String parmName = (String) key;
            String parmValue = ctx.getAttribute(parmName);
            parms.put(parmName, parmValue);
            log.info(fn + "Setting Key= " + parmName + "and Value = " + parmValue);

        }
        Properties returnParams =
            executeGraph(transaction.getExecutionModule(), transaction.getExecutionRPC(), null, "sync", parms);

        log.debug("Returned Params from DG Module: " + transaction.getExecutionModule() + "and DG NAME: "
            + transaction.getExecutionRPC() + returnParams.toString());

        Enumeration e = returnParams.propertyNames();

        while (e.hasMoreElements()) {
            String key = (String) e.nextElement();
            log.info("NEW KEY =  " + key + " -- " + returnParams.getProperty(key));

            ctx.setAttribute(key, returnParams.getProperty(key));
        }

        if (FlowControllerConstants.FAILURE.equalsIgnoreCase(returnParams.getProperty(SVC_LOGIC_STATUS_PARAM))) {
            transaction.setStatus(FlowControllerConstants.FAILURE);
            ctx.setAttribute(
                ctx.getAttribute(FlowControllerConstants.RESPONSE_PREFIX)
                    + FlowControllerConstants.OUTPUT_PARAM_STATUS,
                FlowControllerConstants.OUTPUT_STATUS_FAILURE);
            ctx.setAttribute(ctx.getAttribute(FlowControllerConstants.RESPONSE_PREFIX)
                + FlowControllerConstants.OUTPUT_STATUS_MESSAGE, returnParams.getProperty("error-message"));
            transaction.setStatusCode("401");
            transaction.setState(ctx.getAttribute(transaction.getExecutionModule() + "." + transaction.getExecutionRPC()
                + "." + FlowControllerConstants.OUTPUT_STATUS_MESSAGE));
            // Get error code from above instead setting here ...its for testing purpose

        } else if (FlowControllerConstants.SUCCESS.equalsIgnoreCase(returnParams.getProperty(SVC_LOGIC_STATUS_PARAM))) {
            transaction.setStatus(FlowControllerConstants.SUCCESS);
            transaction.setStatusCode("400");
            ctx.setAttribute(
                ctx.getAttribute(FlowControllerConstants.RESPONSE_PREFIX)
                    + FlowControllerConstants.OUTPUT_PARAM_STATUS,
                FlowControllerConstants.OUTPUT_STATUS_SUCCESS);
            transaction.setState(ctx.getAttribute(transaction.getExecutionModule() + "." + transaction.getExecutionRPC()
                + "." + FlowControllerConstants.OUTPUT_STATUS_MESSAGE));
            // Get error code from above instead setting here ...its for testing purpose
        } else {
            transaction.setStatus(FlowControllerConstants.OTHERS);
            ctx.setAttribute(
                ctx.getAttribute(FlowControllerConstants.RESPONSE_PREFIX)
                    + FlowControllerConstants.OUTPUT_PARAM_STATUS,
                FlowControllerConstants.OUTPUT_STATUS_FAILURE);
            transaction.setStatusCode("401");
            ctx.setAttribute(ctx.getAttribute(FlowControllerConstants.RESPONSE_PREFIX)
                + FlowControllerConstants.OUTPUT_STATUS_MESSAGE, returnParams.getProperty("error-message"));
        }

        return null;
        // Change null to required value if required in upper level
    }
}