package com.vaadin.qa.views.helloworld;


import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.component.treegrid.TreeGrid;
import com.vaadin.flow.function.ValueProvider;
import com.vaadin.flow.router.PageTitle;
import com.vaadin.flow.router.Route;
import com.vaadin.flow.router.RouteAlias;
import org.apache.commons.lang3.RandomStringUtils;

import java.util.ArrayList;
import java.util.Random;

@PageTitle("Hello World")
@Route(value = "hello")
@RouteAlias(value = "")
public class HelloWorldView extends VerticalLayout {

    private class EnverNode {
        private final String eins;
        private final String zwei;

        public EnverNode(){
            eins = RandomStringUtils.randomAlphabetic(15);
            zwei = RandomStringUtils.randomAlphabetic(15);
        }

        public String getEins(){
            return eins;
        }

        public String getZwei(){
            return zwei;
        }
    }

    public HelloWorldView() {
        Random random = new Random();

        setSizeFull();;

        TreeGrid<EnverNode> treeGrid = new TreeGrid<>();
        treeGrid.setWidthFull();
        treeGrid.setAllRowsVisible(true);

        treeGrid.setPageSize(2); // TODO BROKEN: You will only see N * 10 items, followed by blank lines.

        ArrayList<EnverNode> enverNodes = new ArrayList<>();
        for (int i=0; i < 600; i++){
            enverNodes.add(new EnverNode());
        }
        treeGrid.getTreeData().addRootItems(enverNodes);

        for (int i=0; i<12000; i++){
            treeGrid.getTreeData().addItem(enverNodes.get(random.nextInt(enverNodes.size())), new EnverNode());
        }

        ValueProvider<EnverNode, String> textProvider = (EnverNode::getEins);
        treeGrid.addHierarchyColumn(textProvider);

        add(treeGrid);
    }

}