/*
 * Copyright (c) 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.
 */
package org.akraino.validation.ui.conf;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;

import org.akraino.validation.ui.client.nexus.resources.ValidationNexusTestResult;
import org.akraino.validation.ui.data.Lab;
import org.akraino.validation.ui.service.DbResultAdapter;
import org.akraino.validation.ui.service.IntegratedResultService;
import org.akraino.validation.ui.service.utils.PrioritySupplier;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.onap.portalsdk.core.onboarding.util.PortalApiProperties;
import org.onap.portalsdk.core.web.support.UserUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;

@Component
public class ValidationNexusTestResultsGetter implements ApplicationListener<ContextRefreshedEvent> {

    private static final EELFLoggerDelegate LOGGER = EELFLoggerDelegate
            .getLogger(ValidationNexusTestResultsGetter.class);

    @Autowired
    IntegratedResultService integratedService;

    @Autowired
    DbResultAdapter dbAdapter;

    @Override
    public void onApplicationEvent(final ContextRefreshedEvent event) {
        ApplicationContext context = new AnnotationConfigApplicationContext(ExecutorServiceInitializer.class);
        ExecutorService service = (ExecutorService) context.getBean("executorService");
        ValidationNexusTestResultsGetterExecution task = new ValidationNexusTestResultsGetterExecution();
        CompletableFuture<List<List<ValidationNexusTestResult>>> completableFuture = CompletableFuture
                .supplyAsync(new PrioritySupplier<>(1, task::execute), service);
        completableFuture.thenAcceptAsync(results -> this.callbackNotify(results));
    }

    private void callbackNotify(List<List<ValidationNexusTestResult>> results) {
        try {
            for (List<ValidationNexusTestResult> result : results) {

                LOGGER.debug(EELFLoggerDelegate.debugLogger,
                        "Validation test results retrieved from nexus with size : " + result.size());
                dbAdapter.deleteUnreferencedEntries(result);
                dbAdapter.storeResultInDb(result);
            }
            Thread.sleep(Integer.valueOf(PortalApiProperties.getProperty("thread_sleep")));
        } catch (Exception e) {
            LOGGER.error(EELFLoggerDelegate.errorLogger,
                    "Error in callback notification. " + UserUtils.getStackTrace(e));
        }
        // Trigger the next retrieval of results
        ApplicationContext context = new AnnotationConfigApplicationContext(ExecutorServiceInitializer.class);
        ExecutorService service = (ExecutorService) context.getBean("executorService");
        ValidationNexusTestResultsGetterExecution task = new ValidationNexusTestResultsGetterExecution();
        CompletableFuture<List<List<ValidationNexusTestResult>>> completableFuture = CompletableFuture
                .supplyAsync(new PrioritySupplier<>(1, task::execute), service);
        completableFuture.thenAcceptAsync(newResults -> this.callbackNotify(newResults));
    }

    private class ValidationNexusTestResultsGetterExecution {

        public ValidationNexusTestResultsGetterExecution() {
        }

        public List<List<ValidationNexusTestResult>> execute() {
            List<List<ValidationNexusTestResult>> results = new ArrayList<List<ValidationNexusTestResult>>();
            try {
                for (Lab lab : integratedService.getLabsFromNexus()) {
                    for (String blueprintName : integratedService.getBlueprintNamesOfLabFromNexus(lab)) {
                        for (String version : integratedService.getBlueprintVersionsFromNexus(blueprintName, lab)) {
                            LOGGER.debug(EELFLoggerDelegate.debugLogger,
                                    "Trying to retrieve validation test result from nexus for: blueprint name: "
                                            + blueprintName + ", version: " + version + " and lab: " + lab.name());
                            results.add(integratedService.getResultsFromNexus(blueprintName, version, lab,
                                    Integer.valueOf(PortalApiProperties.getProperty("no_last_timestamps"))));
                        }
                    }
                }
            } catch (Exception e) {
                LOGGER.error(EELFLoggerDelegate.errorLogger,
                        "Error when retrieving Nexus results. " + UserUtils.getStackTrace(e));
            }
            return results;
        }
    }

}