package com.example.lenovo.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.*;

import java.util.*;

public class MainActivity extends AppCompatActivity {
    private List<String> strings = new ArrayList<>(Arrays.asList("one", "two"));
    private int idx = 2;
    private ListAdapter arrayAdaper;
    private boolean removeMode = false;
    private ListView listView;
    private SortedSet<Integer> idsToRemove = new TreeSet<>();


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final ListAdapter la1 = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, strings);
        final ListAdapter la2 = new ArrayAdapter<>(this, android.R.layout.simple_list_item_multiple_choice, strings);

        arrayAdaper = la1;
        listView = findViewById(R.id.listView);
        listView.setAdapter(arrayAdaper);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

                if(!removeMode){
                    return;
                }

                CheckedTextView checkedTextView =
                        (CheckedTextView) view.findViewById(android.R.id.text1);

                if (!checkedTextView.isChecked()) {
                    if (!idsToRemove.contains(i)) {
                        idsToRemove.add(i);
                    }
                } else {
                    idsToRemove.remove(new Integer(i));
                }
                checkedTextView.setChecked(!checkedTextView.isChecked());


            }
        });

        final Button buttonRemove = findViewById(R.id.buttonRemove);
        final Button buttonAdd = findViewById(R.id.buttonAdd);

        buttonRemove.setOnClickListener((new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!removeMode) {
                    listView.setAdapter(la2);
                    buttonAdd.setText("usun");
                    buttonRemove.setText("anuluj");
                } else {
                    buttonAdd.setText("dodaj");
                    buttonRemove.setText("usuwanie");
                    listView.setAdapter(la1);
                }
                removeMode