package pt.ist.vaadinframework.ui;

import com.vaadin.ui.Component;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Layout;
import com.vaadin.ui.VerticalLayout;

public class WizardStep extends CustomComponent {
    private static final String CSS_WIZARD_STEP = "v-wizardstep";
    private static final String CSS_DESCRIPTION = "v-wizardstep-description";
    private static final String CSS_ERRORS = "v-wizardstep-errors";
    private static final String CSS_CONTENT = "v-wizardstep-content";
    private final VerticalLayout layout;
    private final HorizontalLayout hlDescription;
    private final HorizontalLayout hlErrors;
    private final HorizontalLayout hlContent;
    private String stepTitle;

    public WizardStep() {
        setStepTitle("");
        layout = new VerticalLayout();
        layout.addStyleName(CSS_WIZARD_STEP);

        hlDescription = new HorizontalLayout();
        hlDescription.setWidth("100%");
        hlDescription.addStyleName(CSS_DESCRIPTION);

        hlErrors = new HorizontalLayout();
        hlErrors.setWidth("100%");
        hlErrors.addStyleName(CSS_ERRORS);

        hlContent = new HorizontalLayout();
        hlContent.setSizeFull();
        hlContent.addStyleName(CSS_CONTENT);

        layout.addComponent(hlDescription);
        layout.addComponent(hlErrors);
        layout.addComponent(hlContent);
        layout.setExpandRatio(hlContent, 1f);
        setCompositionRoot(layout);
    }

    public WizardStep(String stepTitle, Component description, Component errors, Component content) {
        this();
        addDescription(description);
        addErrors(errors);
        addContent(content);
        setStepTitle(stepTitle);
    }

    private void setStepTitle(String stepTitle) {
        this.stepTitle = stepTitle;
    }

    private static void addComponent(Layout layout, Component c) {
        layout.removeAllComponents();
        layout.addComponent(c);
    }

    public void addDescription(Component c) {
        addComponent(hlDescription, c);
    }

    public void addErrors(Component c) {
        addComponent(hlErrors, c);
    }

    public void addContent(Component c) {
        addComponent(hlContent, c);
    }

    public Component getContent() {
        return hlContent.getComponent(0);
    }

    public String getStepTitle() {
        return stepTitle;
    }
}