EDIT

/**

* Copyright (C) 2017 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.vaadin.component.common;

import com.vaadin.data.fieldgroup.BeanFieldGroup;

import com.vaadin.data.fieldgroup.FieldGroup;

import com.vaadin.data.util.BeanItem;

import com.vaadin.server.FontAwesome;

import com.vaadin.server.UserError;

import com.vaadin.ui.Button;

import com.vaadin.ui.Component;

import com.vaadin.ui.CssLayout;

import com.vaadin.ui.themes.ValoTheme;

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

import eu.etaxonomy.cdm.model.agent.Person;

import eu.etaxonomy.cdm.model.agent.Team;

import eu.etaxonomy.cdm.model.agent.TeamOrPersonBase;

import eu.etaxonomy.cdm.vaadin.security.UserHelper;

import eu.etaxonomy.cdm.vaadin.util.converter.CdmBaseDeproxyConverter;

import eu.etaxonomy.vaadin.component.CompositeCustomField;

import eu.etaxonomy.vaadin.component.SwitchableTextField;

import eu.etaxonomy.vaadin.component.ToManyRelatedEntitiesListSelect;

/**

 * @author a.kohlbecker

 * @since May 11, 2017

 *

 */

public class TeamOrPersonField extends CompositeCustomField<TeamOrPersonBase<?>> {

    private static final long serialVersionUID = 660806402243118112L;

    private static final String PRIMARY_STYLE = "v-team-or-person-field";

    private CssLayout root = new CssLayout();

    private CssLayout toolBar= new CssLayout();

    private CssLayout compositeWrapper = new CssLayout();

    private Button removeButton = new Button(FontAwesome.REMOVE);

    private Button personButton = new Button(FontAwesome.USER);

    private Button teamButton = new Button(FontAwesome.USERS);

    // Fields for case when value is a Person

    private PersonField personField = new PersonField();

    // Fields for case when value is a Team

    private SwitchableTextField titleField = new SwitchableTextField("Team (bibliographic)");

    private SwitchableTextField nomenclaturalTitleField = new SwitchableTextField("Team (nomenclatural)");

    private ToManyRelatedEntitiesListSelect<Person, PersonField> personsListEditor = new ToManyRelatedEntitiesListSelect<Person, PersonField>(Person.class, PersonField.class, "Teammembers");

    private BeanFieldGroup<Team> fieldGroup  = new BeanFieldGroup<>(Team.class);

    public TeamOrPersonField(String caption){

        setCaption(caption);

        addStyledComponent(personField);

        addStyledComponent(titleField);

        addStyledComponent(nomenclaturalTitleField);

        addStyledComponent(personsListEditor);

        addStyledComponents(removeButton, personButton, teamButton);

        addSizedComponent(root);

        addSizedComponent(compositeWrapper);

        addSizedComponent(personField);

        addSizedComponent(titleField);

        addSizedComponent(nomenclaturalTitleField);

        addSizedComponent(personsListEditor);

        setConverter(new CdmBaseDeproxyConverter<TeamOrPersonBase<?>>());

        updateToolBarButtonStates();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Component initContent() {

        removeButton.addClickListener(e -> {

            setValue(null);

            updateToolBarButtonStates();

        });

        removeButton.setDescription("Remove");

        personButton.addClickListener(e -> {

            setValue(Person.NewInstance()); // FIXME add SelectField or open select dialog, use ToOneSelect field!!

            updateToolBarButtonStates();

        });

        personButton.setDescription("Add person");

        teamButton.addClickListener(e -> {

            setValue(Team.NewInstance()); // FIXME add SelectField or open select dialog, use ToOneSelect field!!

            updateToolBarButtonStates();

        });

        teamButton.setDescription("Add team");

        toolBar.setStyleName(ValoTheme.LAYOUT_COMPONENT_GROUP + " toolbar");

        toolBar.addComponents(removeButton, personButton, teamButton);

        compositeWrapper.setStyleName("margin-wrapper");

        compositeWrapper.addComponent(toolBar);

        root.setPrimaryStyleName(PRIMARY_STYLE);

        root.addComponent(compositeWrapper);

        return root;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Class getType() {

        return TeamOrPersonBase.class;

    }

    private void updateToolBarButtonStates(){

        TeamOrPersonBase<?> val = getInternalValue();

        boolean userCanCreate = UserHelper.fromSession().userHasPermission(Person.class, "CREATE");

        removeButton.setEnabled(val != null);

        personButton.setEnabled(userCanCreate && val == null);

        teamButton.setEnabled(userCanCreate && val == null);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void setInternalValue(TeamOrPersonBase<?> newValue) {

        super.setInternalValue(newValue);

        newValue = HibernateProxyHelper.deproxy(newValue);

        compositeWrapper.removeAllComponents();

        compositeWrapper.addComponent(toolBar);

        if(newValue == null) {

            return;

        }

        if(Person.class.isAssignableFrom(newValue.getClass())){

            // value is a Person:

            compositeWrapper.addComponent(personField);

            personField.setValue((Person) newValue);

            personField.registerParentFieldGroup(fieldGroup);

        }

        else if(Team.class.isAssignableFrom(newValue.getClass())){

            // otherwise it a Team

            compositeWrapper.addComponents(titleField, nomenclaturalTitleField, personsListEditor);

            titleField.bindTo(fieldGroup, "titleCache", "protectedTitleCache");

            nomenclaturalTitleField.bindTo(fieldGroup, "nomenclaturalTitle", "protectedNomenclaturalTitleCache");

            fieldGroup.bind(personsListEditor, "teamMembers");

            fieldGroup.setItemDataSource(new BeanItem<Team>((Team)newValue));

            personsListEditor.registerParentFieldGroup(fieldGroup);

        } else {

            setComponentError(new UserError("TeamOrPersonField Error: Unsupported value type: " + newValue.getClass().getName()));

        }

        updateToolBarButtonStates();

        checkUserPermissions(newValue);

    }

    private void checkUserPermissions(TeamOrPersonBase<?> newValue) {

        boolean userCanEdit = UserHelper.fromSession().userHasPermission(newValue, "DELETE", "UPDATE");

        titleField.setEnabled(userCanEdit);

        nomenclaturalTitleField.setEnabled(userCanEdit);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void addDefaultStyles() {

        // no default styles here

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public FieldGroup getFieldGroup() {

        return fieldGroup;

    }

    public Component[] getCachFields(){

        return new Component[]{titleField, nomenclaturalTitleField};

    }

}