package de.stl.saar.internetentw2.bildverwaltung.ui.composite;

import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.Composite;
import com.vaadin.flow.component.html.Div;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.component.tabs.Tab;
import com.vaadin.flow.component.tabs.Tabs;
import com.vaadin.flow.component.tabs.Tabs.SelectedChangeEvent;

import java.util.HashMap;
import java.util.Map;

public class TabSheet extends Composite<Div> {

    private final Tabs tabs = new Tabs();
    private final Map<Tab, Component> components = new HashMap<>();

    private final VerticalLayout currentTab = new VerticalLayout();

    public TabSheet() {
        tabs.addSelectedChangeListener(this::handleTabChange);
        getContent().add(tabs, currentTab);
    }

    public void addTab(String caption, Component component) {
        // Komponente zum neuen Tab merken
        final Tab tab = new Tab(caption);
        components.put(tab, component);

        // Neuen Tab den Tabs hinzufügen
        tabs.add(tab);
    }

    private void handleTabChange(SelectedChangeEvent event) {
        // Alte Komponente ausblenden
        currentTab.removeAll();

        // Neue Komponente anzeigen
        final Tab selectedTab = event.getSource().getSelectedTab();
        currentTab.add(components.get(selectedTab));
    }
}