package com.vaadin.tests.contextclick;

import com.vaadin.event.ContextClickEvent;
import com.vaadin.event.ContextClickEvent.ContextClickListener;
import com.vaadin.server.VaadinRequest;
import com.vaadin.tests.components.AbstractTestUIWithLog;
import com.vaadin.ui.AbstractComponent;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.HorizontalLayout;

public abstract class AbstractContextClickUI<T extends AbstractComponent, E extends ContextClickEvent>
        extends AbstractTestUIWithLog {

    private final class ListenerHandler implements Button.ClickListener {
        private boolean hasListener = false;
        private final ContextClickListener listener;

        public ListenerHandler(ContextClickListener listener) {
            this.listener = listener;
        }

        @Override
        public void buttonClick(ClickEvent event) {
            if (!hasListener) {
                testComponent.addContextClickListener(listener);
                event.getButton().setDescription("Remove listener");
                hasListener = true;
            } else {
                testComponent.removeContextClickListener(listener);
                event.getButton().setDescription("Add listener");
                hasListener = false;
            }
        }
    }

    protected T testComponent;
    private ContextClickListener defaultListener = event -> log(
            "ContextClickEvent: (" + event.getClientX() + ", "
                    + event.getClientY() + ")");

    private ContextClickListener typedListener = event -> {
        try {
            E typedEvent = (E) event;
            handleContextClickEvent(typedEvent);
        } catch (Exception e) {
            log("UNEXPECTED EVENT TYPE!");
        }
    };

    @Override
    protected void setup(VaadinRequest request) {
        testComponent = createTestComponent();
        testComponent.setId("testComponent");

        addComponent(testComponent);
        addComponent(createContextClickControls());
    }

    protected abstract T createTestComponent();

    protected abstract void handleContextClickEvent(E event);

    protected HorizontalLayout createContextClickControls() {
        HorizontalLayout contextClickControls = new HorizontalLayout();
        contextClickControls
                .addComponent(new Button("Add/Remove default listener",
                        new ListenerHandler(defaultListener)));
        contextClickControls
                .addComponent(new Button("Add/Remove typed listener",
                        new ListenerHandler(typedListener)));
        return contextClickControls;
    }
}