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/**
 * Copyright (C) 2019 Bonitasoft S.A.
 * Bonitasoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation
 * version 2.1 of the License.
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301, USA.
 **/
package org.bonitasoft.engine.api.impl;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import lombok.extern.slf4j.Slf4j;
import org.bonitasoft.engine.api.PlatformAPI;
import org.bonitasoft.engine.api.impl.transaction.CustomTransactions;
import org.bonitasoft.engine.api.impl.transaction.platform.GetPlatformContent;
import org.bonitasoft.engine.commons.exceptions.SBonitaException;
import org.bonitasoft.engine.exception.BonitaException;
import org.bonitasoft.engine.exception.BonitaHomeConfigurationException;
import org.bonitasoft.engine.exception.BonitaHomeNotSetException;
import org.bonitasoft.engine.exception.BonitaRuntimeException;
import org.bonitasoft.engine.exception.DeletionException;
import org.bonitasoft.engine.exception.RetrieveException;
import org.bonitasoft.engine.exception.UpdateException;
import org.bonitasoft.engine.home.BonitaHomeServer;
import org.bonitasoft.engine.platform.Platform;
import org.bonitasoft.engine.platform.PlatformManager;
import org.bonitasoft.engine.platform.PlatformNotFoundException;
import org.bonitasoft.engine.platform.PlatformService;
import org.bonitasoft.engine.platform.PlatformState;
import org.bonitasoft.engine.platform.StartNodeException;
import org.bonitasoft.engine.platform.StopNodeException;
import org.bonitasoft.engine.platform.exception.STenantNotFoundException;
import org.bonitasoft.engine.platform.model.SPlatform;
import org.bonitasoft.engine.platform.model.STenant;
import org.bonitasoft.engine.service.ModelConvertor;
import org.bonitasoft.engine.service.PlatformServiceAccessor;
import org.bonitasoft.engine.service.impl.ServiceAccessorFactory;

/**
 * @author Matthieu Chaffotte
 * @author Elias Ricken de Medeiros
 * @author Lu Kai
 * @author Zhang Bole
 * @author Yanyan Liu
 * @author Emmanuel Duchastenier
 * @author Celine Souchet
 */
@Slf4j
public class PlatformAPIImpl implements PlatformAPI {

    public PlatformAPIImpl() {
        super();
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public void initializePlatform() {
        //nothing to do
    }

    protected PlatformServiceAccessor getPlatformAccessor()
            throws BonitaHomeNotSetException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IOException, BonitaHomeConfigurationException {
        return ServiceAccessorFactory.getInstance().createPlatformServiceAccessor();
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public void startNode() throws StartNodeException {
        final PlatformServiceAccessor platformAccessor;
        PlatformManager platformManager;
        try {
            platformAccessor = getPlatformAccessor();
            platformManager = platformAccessor.getPlatformManager();
        } catch (final Exception e) {
            throw new StartNodeException(e);
        }
        boolean isStarted;
        try {
            isStarted = platformManager.start();
        } catch (final Exception e) {
            throw new StartNodeException("Platform starting failed.", e);
        }
        if (!isStarted) {
            throw new StartNodeException(
                    "Platform is in state " + platformManager.getState() + " and cannot be started");
        }
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public void stopNode() throws StopNodeException {
        try {
            final PlatformServiceAccessor platformAccessor = getPlatformAccessor();
            platformAccessor.getPlatformManager().stop();
        } catch (final StopNodeException e) {
            throw e;
        } catch (final Exception e) {
            throw new StopNodeException(e);
        }
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public void cleanPlatform() throws DeletionException {
    }

    @Override
    @AvailableOnStoppedNode
    public Platform getPlatform() throws PlatformNotFoundException {
        PlatformServiceAccessor platformAccessor;
        try {
            platformAccessor = getPlatformAccessor();
        } catch (final Exception e) {
            throw new PlatformNotFoundException(e);
        }
        final PlatformService platformService = platformAccessor.getPlatformService();
        final GetPlatformContent transactionContent = new GetPlatformContent(platformService);
        try {
            transactionContent.execute();
        } catch (final SBonitaException e) {
            throw new PlatformNotFoundException(e);
        }
        final SPlatform sPlatform = transactionContent.getResult();
        return ModelConvertor.toPlatform(sPlatform, platformAccessor.getPlatformService().getSPlatformProperties());
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public boolean isPlatformInitialized() throws PlatformNotFoundException {
        try {
            PlatformServiceAccessor platformAccessor = getPlatformAccessor();
            PlatformService platformService = platformAccessor.getPlatformService();
            return platformAccessor.getTransactionService()
                    .executeInTransaction(platformService::isDefaultTenantCreated);
        } catch (final Exception e) {
            throw new PlatformNotFoundException("Cannot determine if the default tenant is created", e);
        }
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public boolean isPlatformCreated() {
        PlatformServiceAccessor platformAccessor;
        try {
            platformAccessor = getPlatformAccessor();
            final PlatformService platformService = platformAccessor.getPlatformService();
            return platformAccessor.getTransactionService().executeInTransaction(platformService::isPlatformCreated);
        } catch (Exception e) {
            throw new BonitaRuntimeException(e);
        }
    }

    @Override
    @CustomTransactions
    @AvailableOnStoppedNode
    public PlatformState getPlatformState() {
        try {
            return getPlatformAccessor().getPlatformManager().getState();
        } catch (Exception e) {
            throw new IllegalStateException(e);
        }
    }

    /**
     * @return true if the current node is started, false otherwise
     */
    @Override
    @AvailableOnStoppedNode
    public boolean isNodeStarted() {
        return getPlatformState() == PlatformState.STARTED;
    }

    @Override
    public void rescheduleErroneousTriggers() throws UpdateException {
        try {
            final PlatformServiceAccessor platformAccessor = getPlatformAccessor();
            platformAccessor.getSchedulerService().rescheduleErroneousTriggers();
        } catch (final Exception e) {
            throw new UpdateException(e);
        }
    }

    @Override
    public Map getClientPlatformConfigurations() {
        return getBonitaHomeServer().getClientPlatformConfigurations();
    }

    @Override
    public Map> getClientTenantConfigurations() {
        try {
            PlatformService platformService = getPlatformAccessor().getPlatformService();
            STenant tenant = platformService.getDefaultTenant();
            HashMap> conf = new HashMap<>();
            conf.put(tenant.getId(), getBonitaHomeServer().getTenantPortalConfigurations(tenant.getId()));
            return conf;
        } catch (BonitaException | IOException | IllegalAccessException | ClassNotFoundException
                | InstantiationException | STenantNotFoundException e) {
            throw new RetrieveException(e);
        }
    }

    @Override
    public byte[] getClientTenantConfiguration(long tenantId, String file) {
        return getBonitaHomeServer().getTenantPortalConfiguration(tenantId, file);
    }

    protected BonitaHomeServer getBonitaHomeServer() {
        return BonitaHomeServer.getInstance();
    }

    @Override
    public void updateClientTenantConfigurationFile(long tenantId, String file, byte[] content) throws UpdateException {
        getBonitaHomeServer().updateTenantPortalConfigurationFile(tenantId, file, content);
    }
}