EDIT

/**

* Copyright (C) 2019 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.taxeditor.preference;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.List;

import java.util.UUID;

import org.apache.commons.lang.StringUtils;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.CLabel;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

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

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

import eu.etaxonomy.cdm.model.metadata.CdmPreference;

import eu.etaxonomy.cdm.model.metadata.IPreferencePredicate;

import eu.etaxonomy.cdm.model.metadata.PreferencePredicate;

import eu.etaxonomy.cdm.model.term.DefinedTermBase;

import eu.etaxonomy.cdm.model.term.TermType;

import eu.etaxonomy.cdm.persistence.dto.AbstractTermDto;

import eu.etaxonomy.cdm.persistence.dto.TermDto;

import eu.etaxonomy.cdm.persistence.dto.TermVocabularyDto;

import eu.etaxonomy.taxeditor.editor.definedterm.DefinedTermSorter;

import eu.etaxonomy.taxeditor.editor.definedterm.TermDtoContentProvider;

import eu.etaxonomy.taxeditor.editor.definedterm.TermDtoLabelProvider;

import eu.etaxonomy.taxeditor.l10n.Messages;

import eu.etaxonomy.taxeditor.preference.menu.CdmPreferencePage;

import eu.etaxonomy.taxeditor.preference.wizard.CheckBoxTreeComposite;

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * @author k.luther

 * @since 05.06.2019

 *

 */

abstract public class AbstractGeneralTermPreference<T extends AbstractTermDto> extends CdmPreferencePage implements ISelectionChangedListener, SelectionListener{

    protected CheckBoxTreeComposite treeComposite;

    protected List<TermVocabularyDto> vocabularies = new ArrayList<>();

    protected Combo useLocalOrAdmin ;

    protected boolean isOverride;

    protected boolean allowOverride;

    protected CdmPreference pref;

    protected IPreferencePredicate predicate;

    public AbstractGeneralTermPreference(){

        super();

    }

    /**

     * @param title

     */

    public AbstractGeneralTermPreference(String title) {

        super(title);

    }

    public boolean isLocalPref() {

        return !isAdminPreference;

    }

    protected TermType type;

    public List<TermVocabularyDto> getVocabularies() {

        return vocabularies;

    }

    public void setVocabularies(List<TermVocabularyDto> vocabularies) {

        this.vocabularies = vocabularies;

    }

    public IPreferencePredicate getPredicate() {

        return predicate;

    }

    public void setPredicate(PreferencePredicate predicate) {

        this.predicate = predicate;

    }

    public CheckBoxTreeComposite getTreeComposite() {

        return treeComposite;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Control createContents(Composite parent) {

        Composite container = new Composite(parent, SWT.NULL);

        getPreferenceValues();

        if (isLocalPref() && !allowOverride){

            final CLabel description = new CLabel(parent, SWT.NULL);

            description.setText(Messages.NameDetailsViewConfiguration_description_not_available);

            this.setDefaultButtonActivated(false);

            return parent;

        }

        final GridLayout gridLayout = new GridLayout();

        gridLayout.numColumns = 2;

        container.setLayout(gridLayout);

        parent.setLayout(new GridLayout());

        useLocalOrAdmin = new Combo(parent, SWT.BORDER | SWT.READ_ONLY);

        if (!isAdminPreference){

            useLocalOrAdmin.add(LocalOrDefaultEnum.Default.getLabel(), 0);

            useLocalOrAdmin.add(LocalOrDefaultEnum.Local.getLabel(), 1);

        }else{

            useLocalOrAdmin.add(LocalOrDefaultEnum.AllowOverride.getLabel(), 0);

            useLocalOrAdmin.add(LocalOrDefaultEnum.Database.getLabel(), 1);

        }

        treeComposite = new CheckBoxTreeComposite(container, new TermDtoContentProvider(), new TermDtoLabelProvider(), SWT.SCROLL_PAGE);

        treeComposite.getViewer().setComparator(new DefinedTermSorter());

        rememberCheckedValues(getCheckedValuesFromPreferences());

        if (isLocalPref()){

            if (isOverride){

                useLocalOrAdmin.select(1);

            }else{

                useLocalOrAdmin.select(0);

                if (treeComposite.getViewer().getTree() != null && treeComposite.getViewer().getTree().getTopItem() != null) {

                    treeComposite.getViewer().getTree().setSelection(treeComposite.getViewer().getTree().getTopItem());

                }

                treeComposite.setEnabled(false);

                //treeComposite.getViewer().getTree().getVerticalBar().setEnabled(true);

            }

        }else{

            if (allowOverride){

                useLocalOrAdmin.select(0);

            }else{

                useLocalOrAdmin.select(1);

            }

        }

        useLocalOrAdmin.addSelectionListener(this);

        GridData data = new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1);

        data.heightHint = 300;

        treeComposite.setLayoutData(data);

        treeComposite.getViewer().addSelectionChangedListener(this);

        return container;

    }

    public String getCheckedValuesFromPreferences(){

        String values;

        if (!isAdminPreference && isOverride){

            values = PreferencesUtil.getStringValue(predicate.getKey(), true);

        }else{

            values = pref != null ?pref.getValue(): null;

        }

        return values;

    }

    protected void rememberCheckedValues(String checkedValues) {

        initialiseVocabularies();

        treeComposite.getViewer().getTree().deselectAll();

        treeComposite.getViewer().refresh();

        treeComposite.getViewer().setInput(getVocabularies());

        if (checkedValues != null && checkedValues != "") { //$NON-NLS-1$

            String[] listChecked = checkedValues.split(";"); //$NON-NLS-1$

            String[] listCheckedComma = checkedValues.split(","); //$NON-NLS-1$

            List<String> checked = new ArrayList<>();

            if (listChecked != null ){

                checked = Arrays.asList(listChecked);

            }

            if (listCheckedComma != null && checkedValues.contains(",")){ //$NON-NLS-1$

                checked = Arrays.asList(listCheckedComma);

            }

            List<T> termsFromStringValues = getTermsFromStringValues(checked);

            treeComposite.setCheckedElements(termsFromStringValues.toArray());

        }else{

            List<T> termsFromStringValues = getTermsFromStringValues(new ArrayList<String>());

            treeComposite.setCheckedElements(termsFromStringValues.toArray());

            treeComposite.getViewer().refresh();

            treeComposite.redraw();

        }

    }

    protected abstract List<T> getTermsFromStringValues(List<String> listValue);

    protected void initialiseVocabularies() {

        if (getVocabularies() != null) {

            getVocabularies().clear();

        }

        List<TermVocabularyDto> vocs = new ArrayList<>();

        vocs = CdmStore.getService(IVocabularyService.class).findVocabularyDtoByTermType(type);

        setVocabularies(vocs);

    }

    protected void getPreferenceValues(){

        pref = PreferencesUtil.getPreferenceFromDB(predicate);

        this.allowOverride = pref!= null?pref.isAllowOverride():true;

        this.isOverride = PreferencesUtil.getBooleanValue(PreferencesUtil.createOverridePreferenceString(predicate.getKey()));

        if (pref == null){

            pref = CdmPreference.NewTaxEditorInstance(predicate, null);

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void selectionChanged(SelectionChangedEvent event) {

        this.setApply(true);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void widgetSelected(SelectionEvent e) {

        if (e.getSource().equals(useLocalOrAdmin)){

            if (useLocalOrAdmin.getText().equals(LocalOrDefaultEnum.Default.getLabel())){

                rememberCheckedValues(getCheckedValuesFromPreferences());

                treeComposite.setEnabled(false);

            }else{

                treeComposite.setEnabled(true);

            }

        }

        this.setApply(true);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void widgetDefaultSelected(SelectionEvent e) {

        // TODO Auto-generated method stub

    }

    @Override

    protected void performDefaults(){

        if (!isLocalPref()){

            rememberCheckedValues("");

            treeComposite.setEnabled(true);

        }else{

            isOverride = false;

            rememberCheckedValues(getCheckedValuesFromPreferences());

            treeComposite.setEnabled(false);

        }

       pref = null;

       useLocalOrAdmin.select(0);

       setApply(true);

       super.performDefaults();

    }

    @Override

    public boolean performOk() {

        if (!isApply()){

            return true;

        }

        Object[] checkedElements = treeComposite.getViewer().getCheckedElements();

        List<UUID> listUIIDChecked = new ArrayList<>();

        Collection<TermDto> preferredTermDtos = new ArrayList<>();

        List<DefinedTermBase> preferredTerms = new ArrayList<>();

        for (Object o : checkedElements) {

            if(o instanceof TermDto){

                TermDto termDto = (TermDto) o;

                listUIIDChecked.add(termDto.getUuid());

                preferredTermDtos.add(termDto);

                if (vocabularies.size() > 1){

                    preferredTerms.add(CdmStore.getService(ITermService.class).load(termDto.getUuid()));

                }

            }

        }

        String saveCheckedElements = StringUtils.join(listUIIDChecked, ";"); //$NON-NLS-1$

        PreferencesUtil.setStringValue(predicate.getKey(), saveCheckedElements);

        String text = this.useLocalOrAdmin.getText();

        if (text.equals(LocalOrDefaultEnum.Database.getLabel()) || text.equals(LocalOrDefaultEnum.Default.getLabel())){

            PreferencesUtil.setBooleanValue(PreferencesUtil.createOverridePreferenceString(predicate.getKey()), false);

        }else if (text.equals(LocalOrDefaultEnum.Local.getLabel())){

            PreferencesUtil.setBooleanValue(PreferencesUtil.createOverridePreferenceString(predicate.getKey()), true);

        }

        if (type == null){

            CdmStore.getTermManager().setPreferredTermsByDto(preferredTermDtos, vocabularies.get(0));

        }else{

            CdmStore.getTermManager().setPreferredTermsByType(preferredTermDtos, type);

        }

        PreferencesUtil.firePreferencesChanged(this.getClass());

        return true;

    }

    protected boolean performOkAdmin() {

        Object[] checkedElements = treeComposite.getViewer().getCheckedElements();

        List<UUID> listUIIDChecked = new ArrayList<>();

        List<DefinedTermBase> preferredTerms = new ArrayList<>();

        for (Object o : checkedElements) {

            if(o instanceof TermDto){

                TermDto termDto = (TermDto) o;

                listUIIDChecked.add(termDto.getUuid());

                preferredTerms.add(CdmStore.getService(ITermService.class).load(termDto.getUuid()));

            }

        }

        String saveCheckedElements = StringUtils.join(listUIIDChecked, ";"); //$NON-NLS-1$

        if (StringUtils.isBlank(saveCheckedElements)){

            saveCheckedElements = null;

        }

        CdmPreference savePref = CdmPreference.NewTaxEditorInstance(predicate, saveCheckedElements);

        String text = this.useLocalOrAdmin.getText();

        if (text.equals(LocalOrDefaultEnum.Database.getLabel()) ){

            savePref.setAllowOverride(false);

        }else if (text.equals(LocalOrDefaultEnum.AllowOverride.getLabel())){

            savePref.setAllowOverride(true);

        }

        PreferencesUtil.setPreferenceToDB(savePref);

        PreferencesUtil.updateDBPreferences();

        PreferencesUtil.firePreferencesChanged(this.getClass());

        return true;

    }

}