/*
 * Copyright 2017-present Facebook, Inc.
 *
 * 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.facebook.buck.android.resources;

import static org.junit.Assert.assertEquals;

import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.testutil.integration.TemporaryPaths;
import com.facebook.buck.testutil.integration.TestDataHelper;
import com.google.common.collect.ImmutableList;
import com.google.common.io.ByteStreams;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.file.Path;
import java.util.zip.ZipFile;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

public class ChunkUtilsTest {
  private static final String APK_NAME = "example.apk";

  @Rule public TemporaryPaths tmpFolder = new TemporaryPaths();
  private ProjectFilesystem filesystem;
  private Path apkPath;

  @Before
  public void setUp() throws InterruptedException, IOException {
    filesystem =
        new ProjectFilesystem(TestDataHelper.getTestDataDirectory(this).resolve("aapt_dump"));
    apkPath = filesystem.resolve(filesystem.getPath(APK_NAME));
  }

  @Test
  public void testFindChunksInArsc() throws Exception {
    try (ZipFile apkZip = new ZipFile(apkPath.toFile())) {
      ByteBuffer buf =
          ResChunk.wrap(
              ByteStreams.toByteArray(apkZip.getInputStream(apkZip.getEntry("resources.arsc"))));

      assertEquals(
          ImmutableList.of(12, 660, 760), ChunkUtils.findChunks(buf, ResChunk.CHUNK_STRING_POOL));

      assertEquals(ImmutableList.of(0), ChunkUtils.findChunks(buf, ResChunk.CHUNK_RESOURCE_TABLE));
      assertEquals(
          ImmutableList.of(372), ChunkUtils.findChunks(buf, ResChunk.CHUNK_RES_TABLE_PACKAGE));
      assertEquals(
          ImmutableList.of(1024, 1040, 1320, 1436, 1624, 1896),
          ChunkUtils.findChunks(buf, ResChunk.CHUNK_RES_TABLE_TYPE_SPEC));
      assertEquals(
          ImmutableList.of(1072, 1196, 1340, 1468, 1652, 1920),
          ChunkUtils.findChunks(buf, ResChunk.CHUNK_RES_TABLE_TYPE));

      assertEquals(ImmutableList.of(), ChunkUtils.findChunks(buf, ResChunk.CHUNK_XML_TREE));
      assertEquals(ImmutableList.of(), ChunkUtils.findChunks(buf, ResChunk.CHUNK_XML_REF_MAP));
    }
  }

  @Test
  public void testFindChunksInManifest() throws Exception {
    try (ZipFile apkZip = new ZipFile(apkPath.toFile())) {
      ByteBuffer buf =
          ResChunk.wrap(
              ByteStreams.toByteArray(
                  apkZip.getInputStream(apkZip.getEntry("AndroidManifest.xml"))));

      assertEquals(ImmutableList.of(8), ChunkUtils.findChunks(buf, ResChunk.CHUNK_STRING_POOL));

      assertEquals(ImmutableList.of(), ChunkUtils.findChunks(buf, ResChunk.CHUNK_RESOURCE_TABLE));
      assertEquals(
          ImmutableList.of(), ChunkUtils.findChunks(buf, ResChunk.CHUNK_RES_TABLE_PACKAGE));
      assertEquals(ImmutableList.of(), ChunkUtils.findChunks(buf, ResChunk.CHUNK_RES_TABLE_TYPE));
      assertEquals(
          ImmutableList.of(), ChunkUtils.findChunks(buf, ResChunk.CHUNK_RES_TABLE_TYPE_SPEC));

      assertEquals(ImmutableList.of(0), ChunkUtils.findChunks(buf, ResChunk.CHUNK_XML_TREE));
      assertEquals(ImmutableList.of(1072), ChunkUtils.findChunks(buf, ResChunk.CHUNK_XML_REF_MAP));
    }
  }
}