// Copyright 2018 The Feed Authors.
//
// 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.google.android.libraries.feed.piet;

import static com.google.android.libraries.feed.common.testing.RunnableSubject.assertThatRunnable;
import static com.google.common.truth.Truth.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import static org.mockito.MockitoAnnotations.initMocks;

import android.app.Activity;
import android.content.Context;
import android.view.Gravity;
import android.widget.TextView;
import com.google.android.libraries.feed.common.time.testing.FakeClock;
import com.google.android.libraries.feed.piet.DebugLogger.MessageType;
import com.google.android.libraries.feed.piet.host.AssetProvider;
import com.google.search.now.ui.piet.BindingRefsProto.ParameterizedTextBindingRef;
import com.google.search.now.ui.piet.ElementsProto.BindingValue;
import com.google.search.now.ui.piet.ElementsProto.Element;
import com.google.search.now.ui.piet.ElementsProto.TextElement;
import com.google.search.now.ui.piet.ErrorsProto.ErrorCode;
import com.google.search.now.ui.piet.RoundedCornersProto.RoundedCorners;
import com.google.search.now.ui.piet.StylesProto.Font;
import com.google.search.now.ui.piet.StylesProto.StyleIdsStack;
import com.google.search.now.ui.piet.TextProto.ParameterizedText;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;

/**
 * Tests of the {@link ParameterizedTextElementAdapter}; also tests base features of {@link
 * TextElementAdapter}.
 */
@RunWith(RobolectricTestRunner.class)
public class ParameterizedTextElementAdapterTest {
  private static final String TEXT_LINE_CONTENT = "Content";
  private static final String BINDING = "binding";
  private static final ParameterizedTextBindingRef DEFAULT_BINDING_REF =
      ParameterizedTextBindingRef.newBuilder().setBindingId(BINDING).build();

  @Mock private FrameContext frameContext;
  @Mock private StyleProvider mockStyleProvider;
  @Mock private HostProviders hostProviders;
  @Mock private AssetProvider assetProvider;

  private AdapterParameters adapterParameters;

  private Context context;

  private ParameterizedTextElementAdapter adapter;

  @Before
  public void setUp() throws Exception {
    initMocks(this);
    context = Robolectric.buildActivity(Activity.class).get();

    when(hostProviders.getAssetProvider()).thenReturn(assetProvider);
    when(assetProvider.isRtL()).thenReturn(false);
    when(mockStyleProvider.getRoundedCorners()).thenReturn(RoundedCorners.getDefaultInstance());
    when(mockStyleProvider.getTextAlignment()).thenReturn(Gravity.START | Gravity.TOP);

    adapterParameters =
        new AdapterParameters(
            null,
            null,
            hostProviders,
            new ParameterizedTextEvaluator(new FakeClock()),
            null,
            null,
            new FakeClock());

    when(frameContext.makeStyleFor(any(StyleIdsStack.class)))
        .thenReturn(adapterParameters.defaultStyleProvider);

    adapter =
        new ParameterizedTextElementAdapter.KeySupplier().getAdapter(context, adapterParameters);
  }

  @Test
  public void testCreate() {
    assertThat(adapter).isNotNull();
  }

  @Test
  public void testBindModel_basic() {
    Element model = getBaseTextElement();
    adapter.createAdapter(model, frameContext);
    adapter.bindModel(model, frameContext);
    assertThat(adapter.getView()).isNotNull();
    TextView textView = adapter.getBaseView();
    assertThat(textView).isNotNull();
    assertThat(textView.getText().toString()).isEqualTo(TEXT_LINE_CONTENT);
  }

  @Test
  public void testBindModel_noContent() {
    adapter.createAdapter(getBaseTextElement(), frameContext);
    Element model = asElement(TextElement.getDefaultInstance());
    adapter.bindModel(model, frameContext);

    TextView textView = adapter.getBaseView();
    assertThat(textView).isNotNull();
    assertThat(textView.getText().toString()).isEmpty();
    verify(frameContext)
        .reportMessage(
            MessageType.ERROR,
            ErrorCode.ERR_MISSING_OR_UNHANDLED_CONTENT,
            "TextElement missing ParameterizedText content; has CONTENT_NOT_SET");
  }

  @Test
  public void testBindModel_withBinding_someText() {
    ParameterizedText parameterizedText =
        ParameterizedText.newBuilder().setText(TEXT_LINE_CONTENT).build();
    BindingValue bindingValue =
        BindingValue.newBuilder().setParameterizedText(parameterizedText).build();
    when(frameContext.getParameterizedTextBindingValue(DEFAULT_BINDING_REF))
        .thenReturn(bindingValue);

    Element model = getBindingTextElement(null);
    adapter.createAdapter(model, frameContext);
    adapter.bindModel(model, frameContext);
    assertThat(adapter.getView()).isNotNull();
    TextView textView = adapter.getBaseView();
    assertThat(textView).isNotNull();
    assertThat(textView.getText().toString()).isEqualTo(TEXT_LINE_CONTENT);
  }

  @Test
  public void testBindModel_withBinding_noContent() {
    when(frameContext.getParameterizedTextBindingValue(DEFAULT_BINDING_REF))
        .thenReturn(BindingValue.newBuilder().setBindingId(BINDING).build());

    Element model = getBindingTextElement(null);
    adapter.createAdapter(model, frameContext);

    assertThatRunnable(() -> adapter.bindModel(model, frameContext))
        .throwsAnExceptionOfType(PietFatalException.class)
        .that()
        .hasMessageThat()
        .contains("Parameterized text binding binding had no content");
  }

  @Test
  public void testBindModel_withBinding_optionalAbsent() {
    Element model = getBindingTextElement(null /* StyleProvider*/);
    adapter.createAdapter(model, frameContext);
    Element modelOptionalBinding =
        asElement(
            TextElement.newBuilder()
                .setParameterizedTextBinding(DEFAULT_BINDING_REF.toBuilder().setIsOptional(true))
                .build());
    when(frameContext.getParameterizedTextBindingValue(
            modelOptionalBinding.getTextElement().getParameterizedTextBinding()))
        .thenReturn(BindingValue.getDefaultInstance());

    adapter.bindModel(modelOptionalBinding, frameContext);

    assertThat(adapter.getView()).isNotNull();
    TextView textView = adapter.getBaseView();
    assertThat(textView).isNotNull();
    assertThat(textView.getText().toString()).isEmpty();
  }

  @Test
  public void testBindModel_html() {
    Element model =
        asElement(
            TextElement.newBuilder()
                .setParameterizedText(
                    ParameterizedText.newBuilder().setIsHtml(true).setText("<h1>HEADING!</h1>"))
                .build());
    adapter.createAdapter(model, frameContext);
    adapter.bindModel(model, frameContext);
    assertThat(adapter.getView()).isNotNull();
    TextView textView = adapter.getBaseView();
    assertThat(textView).isNotNull();
    assertThat(textView.getText().toString()).isEqualTo("HEADING!\n\n");
  }

  @Test
  public void testStyles_padding() {
    Element model =
        asElement(
            TextElement.newBuilder()
                .setStyleReferences(StyleIdsStack.getDefaultInstance())
                .build());

    when(frameContext.makeStyleFor(any(StyleIdsStack.class))).thenReturn(mockStyleProvider);

    when(mockStyleProvider.getFont()).thenReturn(Font.getDefaultInstance());

    adapter.createAdapter(model, frameContext);
    assertThat(adapter.getView()).isNotNull();
    verify(mockStyleProvider).applyElementStyles(adapter);
    TextView textView = adapter.getBaseView();
    assertThat(textView).isNotNull();
  }

  private Element getBindingTextElement(/*@Nullable*/ StyleProvider styleProvider) {
    StyleProvider sp =
        styleProvider != null ? styleProvider : adapterParameters.defaultStyleProvider;
    when(frameContext.makeStyleFor(any(StyleIdsStack.class))).thenReturn(sp);
    return asElement(
        TextElement.newBuilder().setParameterizedTextBinding(DEFAULT_BINDING_REF).build());
  }

  private Element getBaseTextElement() {
    return getBaseTextElement(null);
  }

  private Element getBaseTextElement(/*@Nullable*/ StyleProvider styleProvider) {
    StyleProvider sp =
        styleProvider != null ? styleProvider : adapterParameters.defaultStyleProvider;
    when(frameContext.makeStyleFor(any(StyleIdsStack.class))).thenReturn(sp);

    return asElement(
        TextElement.newBuilder()
            .setParameterizedText(ParameterizedText.newBuilder().setText(TEXT_LINE_CONTENT))
            .build());
  }

  private static Element asElement(TextElement textElement) {
    return Element.newBuilder().setTextElement(textElement).build();
  }
}