EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.io.common;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.apache.log4j.Logger;

import org.springframework.beans.BeansException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ApplicationContextAware;

import org.springframework.stereotype.Component;

import eu.etaxonomy.cdm.api.service.IService;

import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;

import eu.etaxonomy.cdm.common.monitor.SubProgressMonitor;

import eu.etaxonomy.cdm.io.common.events.IIoObserver;

import eu.etaxonomy.cdm.model.common.CdmBase;

/**

 * This class is an default exporter class that is a spring bean and therefore it knows all other IO classes that are beans

 *

 * @author a.mueller

 * @created 20.06.2008

 */

@Component("defaultExport")

public class CdmApplicationAwareDefaultExport<T extends IExportConfigurator>

        implements ICdmExporter<T>, ApplicationContextAware {

    private static final Logger logger = Logger.getLogger(CdmApplicationAwareDefaultExport.class);

	protected ApplicationContext applicationContext;

	@Override

    public void setApplicationContext(ApplicationContext applicationContext)

			throws BeansException {

		this.applicationContext = applicationContext;

	}

	//Constants

	final static boolean OBLIGATORY = true;

	final static boolean FACULTATIVE = false;

	final int modCount = 1000;

	private final IService service = null;

	//different type of stores that are used by the known imports

	Map<String, MapWrapper<? extends CdmBase>> stores = new HashMap<String, MapWrapper<? extends CdmBase>>();

	public CdmApplicationAwareDefaultExport(){

		stores.put(ICdmIO.TEAM_STORE, new MapWrapper<>(service));

		stores.put(ICdmIO.REFERENCE_STORE, new MapWrapper<>(service));

		stores.put(ICdmIO.NOMREF_STORE, new MapWrapper<>(service));

		stores.put(ICdmIO.TAXONNAME_STORE, new MapWrapper<>(service));

		stores.put(ICdmIO.TAXON_STORE, new MapWrapper<>(service));

		stores.put(ICdmIO.SPECIMEN_STORE, new MapWrapper<>(service));

	}

	@Override

    public ExportResult invoke(T config){

	    ExportResult result;

	    if (config.getCheck().equals(IExportConfigurator.CHECK.CHECK_ONLY)){

		    result = ExportResult.NewInstance(config.getResultType());

		    boolean success =  doCheck(config);

		    if (! success){

		        result.setAborted();

		    }

		}else if (config.getCheck().equals(IExportConfigurator.CHECK.CHECK_AND_EXPORT)){

		    boolean success = doCheck(config);

		    if (success){

		        result = doExport(config);

		    }else{

		        result = ExportResult.NewInstance(config.getResultType());

	            result.setAborted();

		    }

		}else if (config.getCheck().equals(IExportConfigurator.CHECK.EXPORT_WITHOUT_CHECK)){

			result = doExport(config);

		}else{

		    result = ExportResult.NewInstance(config.getResultType());

            String message = "Unknown CHECK type";

            logger.error(message);

            result.addError(message);

 		}

		return result;

	}

    public ExportResult execute(T config) {

	    ExportResult result = ExportResult.NewInstance(config.getResultType());

	    if (config.getCheck().equals(IExportConfigurator.CHECK.CHECK_ONLY)){

	        boolean success =  doCheck(config);

            if (! success){

                result.setAborted();

            }

        } else if (config.getCheck().equals(IExportConfigurator.CHECK.CHECK_AND_EXPORT)){

            boolean success = doCheck(config);

            if (success){

                result = doExport(config);

            }else{

                result.setAborted();

            }

        } else if (config.getCheck().equals(IExportConfigurator.CHECK.EXPORT_WITHOUT_CHECK)){

            result = doExport(config);

        } else{

            String message = "Unknown CHECK type";

            logger.error(message);

            result.addError(message);

        }

	    return result;

	}

	@SuppressWarnings("unchecked")

	protected <S extends IExportConfigurator> boolean doCheck(S  config){

	    boolean result = true;

		//check

		if (config == null){

			logger.warn("CdmExportConfiguration is null");

//			result.setState(ExportResultState.ABORTED);

			return false;

		}else if (! config.isValid()){

			logger.warn("CdmExportConfiguration is not valid");

//			result.setState(ExportResultState.ABORTED);

            return false;

		}

		System.out.println("Start checking Source ("+ config.getSourceNameString() + ") ...");

		ExportStateBase state = config.getNewState();

		state.initialize(config);

		//do check for each class

		for (Class<ICdmExport> ioClass: config.getIoClassList()){

			try {

				String ioBeanName = getComponentBeanName(ioClass);

				ICdmIO cdmIo = applicationContext.getBean(ioBeanName, ICdmIO.class);

				if (cdmIo != null){

					registerObservers(config, cdmIo);

					result &= cdmIo.check(state);

					unRegisterObservers(config, cdmIo);

				}else{

				    String message = "cdmIO for class " + (ioClass == null ? "(null)" : ioClass.getSimpleName()) + " was null";

					logger.error(message);

					return false;

				}

			} catch (Exception e) {

					logger.error(e);

					e.printStackTrace();

					return false;

			}

		}

		//return

		System.out.println("End checking Source ("+ config.getSourceNameString() + ") for export from Cdm");

		return result;

	}

	private void registerObservers(IExportConfigurator config, ICdmIO io){

		for (IIoObserver observer : config.getObservers()){

			io.addObserver(observer);

		}

	}

	private void unRegisterObservers(IExportConfigurator config, ICdmIO io){

		for (IIoObserver observer : config.getObservers()){

			io.removeObserver(observer);

		}

	}

	/**

	 * Executes the whole

	 */

	protected <CONFIG extends T>  ExportResult doExport(CONFIG config){

		//validate

		if (config == null){

		    ExportResult result = ExportResult.NewInstance(null);

		    String message = "Configuration is null";

			logger.error(message);

			result.addError(message);

			result.setAborted();

			return result;

		}

		ExportResult result = ExportResult.NewInstance(config.getResultType());

		if (! config.isValid()){

			String message = "Configuration is not valid";

		    logger.error(message);

		    result.addError(message);

			result.setAborted();

			return result;

		}

		System.out.println("Start export from source '" + config.getSourceNameString()

				+ "' to destination '" + config.getDestinationNameString() + "'");

		ExportStateBase state = config.getNewState();

		state.initialize(config);

		state.setResult(result);

		List<ICdmExport> ioList = makeIoList(state, config);

		List<Integer> stepCounts = countSteps(state, ioList);

		Integer totalCount = stepCounts.get(stepCounts.size()-1);

		config.getProgressMonitor().beginTask("Start Export", totalCount);

		config.getProgressMonitor().worked(1);

		IProgressMonitor parentMonitor = SubProgressMonitor

		        .NewStarted(config.getProgressMonitor(), 99, "Process data", totalCount);

		//do invoke for each class

		for (int i = 0; i< ioList.size(); i++){

		    ICdmExport export = ioList.get(i);

		    Integer counts = stepCounts.get(i);

			try {

			    String ioName = export.getClass().getSimpleName();

			    SubProgressMonitor ioMonitor = SubProgressMonitor

			            .NewStarted(parentMonitor, counts, ioName, counts );

//			    state.getConfig().setProgressMonitor(ioMonitor);

			    state.setCurrentIO(export);

				export.invoke(state);

				ioMonitor.done();

			} catch (Exception e) {

				String message = "Unexpected exception in " + export.getClass().getSimpleName()+ ": " + e.getMessage();

				logger.error(message);

				e.printStackTrace();

		        result.addException(e, message);

			}

		}

		System.out.println("End export from source '" + config.getSourceNameString()

				+ "' to destination '" + config.getDestinationNameString() + "' "

				+ "("+ result.toString() + ")"

				) ;

		return result;

	}

	/**

     * @param state

     * @param ioList

     * @return

     */

    private List<Integer> countSteps(ExportStateBase state, List<ICdmExport> ioList) {

        //do invoke for each class

        List<Integer> result = new ArrayList<>();

        int sum = 0;

        for (ICdmExport export: ioList){

            int count = 1;

            try {

//                state.setCurrentIO(export);

                count = ((Long)export.countSteps(state)).intValue();

            } catch (Exception e) {

                String message = "Unexpected exception when count steps for progress monitoring " + export.getClass().getSimpleName()+ ": " + e.getMessage();

                logger.error(message);

                e.printStackTrace();

                state.getResult().addException(e, message);

            }

            result.add(count);

            sum += count;

        }

        result.add(sum);

        return result;

    }

    /**

     * @param state

     * @param config

     * @return

     */

    private <CONFIG extends T>  List<ICdmExport> makeIoList(ExportStateBase state, CONFIG config) {

        List<ICdmExport> result = new ArrayList<>();

        for (Class<ICdmExport> ioClass: config.getIoClassList()){

            try {

                String ioBeanName = getComponentBeanName(ioClass);

                ICdmExport cdmIo = applicationContext.getBean(ioBeanName, ICdmExport.class);

                if (cdmIo != null){

                    result.add(cdmIo);

                }else{

                    String message = "cdmIO was null: " + ioBeanName;

                    logger.error(message);

                    state.getResult().addError(message);

                }

            } catch (Exception e) {

                    String message = "Unexpected exception in " + ioClass.getSimpleName()+ ": " + e.getMessage();

                    logger.error(message);

                    e.printStackTrace();

                    state.getResult().addException(e, message);

            }

        }

        return result;

    }

    private String getComponentBeanName(Class<ICdmExport> ioClass){

		Component component = ioClass.getAnnotation(Component.class);

		String ioBean = component.value();

		if ("".equals(ioBean)){

			ioBean = ioClass.getSimpleName();

			ioBean = ioBean.substring(0, 1).toLowerCase() + ioBean.substring(1); //make camelcase

		}

		return ioBean;

	}

}