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 org.vaadin.teemu.switchui.Switch;

import com.vaadin.data.fieldgroup.BeanFieldGroup;

import com.vaadin.data.fieldgroup.FieldGroup;

import com.vaadin.ui.Component;

import com.vaadin.ui.CssLayout;

import com.vaadin.ui.TextField;

import com.vaadin.ui.themes.ValoTheme;

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

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

import eu.etaxonomy.vaadin.component.CompositeCustomField;

import eu.etaxonomy.vaadin.component.SwitchButton;

/**

 * @author a.kohlbecker

 * @since May 11, 2017

 *

 */

public class PersonField extends CompositeCustomField<Person> {

    private static final long serialVersionUID = 8346575511284469356L;

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

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

    enum Mode {

        CACHE_MODE, DETAILS_MODE;

        public String toCssClass() {

            return name().toLowerCase().replace("_", "-");

        }

    }

    private Mode currentMode = null;

    private float baseWidth = 100 / 8;

    private CssLayout root = new CssLayout();

    private TextField cacheField = new TextField();

    private CssLayout detailsContainer = new CssLayout();

    private TextField firstNameField = new TextField();

    private TextField lastNameField = new TextField();

    private TextField prefixField = new TextField();

    private TextField suffixField = new TextField();

    private SwitchButton unlockSwitch = new SwitchButton();

    /**

     * @param caption

     */

    public PersonField(String caption) {

        this();

        setCaption(caption);

    }

    /**

     * @param caption

     */

    public PersonField() {

        root.setPrimaryStyleName(PRIMARY_STYLE);

        addStyledComponent(cacheField);

        addStyledComponent(firstNameField);

        addStyledComponent(lastNameField);

        addStyledComponent(prefixField);

        addStyledComponent(suffixField);

        addStyledComponent(unlockSwitch);

        addSizedComponent(root);

    }

    /**

     *

     */

    private void checkUserPermissions(Person newValue) {

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

        cacheField.setEnabled(userCanEdit);

        firstNameField.setEnabled(userCanEdit);

        lastNameField.setEnabled(userCanEdit);

        prefixField.setEnabled(userCanEdit);

        suffixField.setEnabled(userCanEdit);

    }

    private void setMode(Mode mode){

        if(mode.equals(currentMode)){

            return;

        }

        if(currentMode != null){

            String removeMode = currentMode.toCssClass();

            root.removeStyleName(removeMode);

        }

        String newMode = mode.toCssClass();

        root.addStyleName(newMode);

        currentMode = mode;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected Component initContent() {

        root.addComponent(cacheField);

        root.addComponent(unlockSwitch);

        cacheField.setWidth(100, Unit.PERCENTAGE);

        prefixField.setWidth(baseWidth, Unit.PERCENTAGE);

        prefixField.setInputPrompt("Prefix");

        firstNameField.setWidth(baseWidth * 3, Unit.PERCENTAGE);

        firstNameField.setInputPrompt("First Name");

        lastNameField.setWidth(baseWidth * 3, Unit.PERCENTAGE);

        lastNameField.setInputPrompt("Last Name");

        suffixField.setWidth(baseWidth, Unit.PERCENTAGE);

        suffixField.setInputPrompt("Suffix");

        detailsContainer.setStyleName(ValoTheme.LAYOUT_COMPONENT_GROUP);

        detailsContainer.addComponent(prefixField);

        detailsContainer.addComponent(firstNameField);

        detailsContainer.addComponent(lastNameField);

        detailsContainer.addComponent(suffixField);

        root.addComponent(detailsContainer);

        unlockSwitch.addValueChangeListener(e -> {

            if(refreshMode()){

                switch (currentMode) {

                    case CACHE_MODE:

                        cacheField.focus();

                        break;

                    case DETAILS_MODE:

                        firstNameField.focus();

                        break;

                    default:

                        break;

                }

            }

        });

        unlockSwitch.setValueSetLister(e -> {

            refreshMode();

        });

        addDefaultStyles();

        setMode(Mode.DETAILS_MODE);

        fieldGroup.bind(cacheField, "titleCache");

        fieldGroup.bind(prefixField, "prefix");

        fieldGroup.bind(firstNameField, "firstname");

        fieldGroup.bind(lastNameField, "lastname");

        fieldGroup.bind(suffixField, "suffix");

        fieldGroup.bind(unlockSwitch, "protectedTitleCache");

        fieldGroup.setBuffered(false);

        return root;

    }

    /**

     *

     * @return true if the mode has changed

     */

    protected boolean refreshMode() {

        Mode lastMode = currentMode;

        setMode(unlockSwitch.getValue() ? Mode.CACHE_MODE: Mode.DETAILS_MODE);

        return !lastMode.equals(currentMode);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Class<? extends Person> getType() {

        return Person.class;

    }

    @Override

    public void setValue(Person person){

        super.setValue(person);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void setInternalValue(Person newValue) {

        super.setInternalValue(newValue);

        fieldGroup.setItemDataSource(newValue);

        checkUserPermissions(newValue);

    }

    @Override

    protected void addDefaultStyles(){

        cacheField.addStyleName("cache-field");

        detailsContainer.addStyleName("details-fields");

        unlockSwitch.addStyleName(Switch.ICON_STYLE);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public FieldGroup getFieldGroup() {

        return fieldGroup;

    }

}