/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.setupwizardlib.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;

import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.support.test.InstrumentationRegistry;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import com.android.setupwizardlib.items.ButtonBarItem;
import com.android.setupwizardlib.items.ButtonItem;
import com.android.setupwizardlib.items.Item;
import com.android.setupwizardlib.items.ItemHierarchy;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(AndroidJUnit4.class)
@SmallTest
public class ButtonBarItemTest {

  private ButtonItem mChild1;
  private ButtonItem mChild2;
  private ButtonItem mChild3;

  @Before
  public void setUp() throws Exception {
    mChild1 = new ButtonItem();
    mChild2 = new ButtonItem();
    mChild3 = new ButtonItem();
  }

  @Test
  public void testFindItemById() {
    ButtonBarItem item = new ButtonBarItem();
    item.setId(888);

    mChild1.setId(123);
    mChild2.setId(456);
    mChild3.setId(789);
    item.addChild(mChild1);
    item.addChild(mChild2);
    item.addChild(mChild3);

    assertEquals("Finding 123 should return child1", mChild1, item.findItemById(123));
    assertEquals("Finding 456 should return child2", mChild2, item.findItemById(456));
    assertEquals("Finding 789 should return child3", mChild3, item.findItemById(789));

    assertEquals("Finding 888 should return ButtonBarItem itself", item, item.findItemById(888));

    assertNull("Finding 999 should return null", item.findItemById(999));
  }

  @Test
  public void testBindEmpty() {
    ButtonBarItem item = new ButtonBarItem();
    final ViewGroup layout = createLayout();
    item.onBindView(layout);

    assertEquals(
        "Binding empty ButtonBar should not create any children", 0, layout.getChildCount());
  }

  @Test
  public void testBind() {
    ButtonBarItem item = new ButtonBarItem();

    item.addChild(mChild1);
    mChild1.setText("child1");
    item.addChild(mChild2);
    mChild2.setText("child2");
    item.addChild(mChild3);
    mChild3.setText("child3");

    final ViewGroup layout = createLayout();
    item.onBindView(layout);

    assertEquals("Binding ButtonBar should create 3 children", 3, layout.getChildCount());
    assertEquals(
        "First button should have text \"child1\"",
        "child1",
        ((Button) layout.getChildAt(0)).getText());
    assertEquals(
        "Second button should have text \"child2\"",
        "child2",
        ((Button) layout.getChildAt(1)).getText());
    assertEquals(
        "Third button should have text \"child3\"",
        "child3",
        ((Button) layout.getChildAt(2)).getText());
  }

  @Test
  public void testAddInvalidChild() {
    ButtonBarItem item = new ButtonBarItem();

    ItemHierarchy invalidChild = new Item();

    try {
      item.addChild(invalidChild);
      fail("Adding non ButtonItem to ButtonBarItem should throw exception");
    } catch (UnsupportedOperationException e) {
      // pass
    }
  }

  private ViewGroup createLayout() {
    return new LinearLayout(InstrumentationRegistry.getContext());
  }
}