// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "services/shape_detection/face_detection_impl_mac.h"

#include <memory>
#include <utility>

#include "base/base64.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/mac/mac_util.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/test/gmock_callback_support.h"
#include "base/test/task_environment.h"
#include "services/shape_detection/face_detection_impl_mac_vision.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/jpeg_codec.h"
#include "ui/gl/gl_switches.h"

using base::test::RunOnceClosure;
using ::testing::TestWithParam;
using ::testing::ValuesIn;

namespace shape_detection {

namespace {

std::unique_ptr<mojom::FaceDetection> CreateFaceDetectorImplMac(
    shape_detection::mojom::FaceDetectorOptionsPtr options) {
  return std::make_unique<FaceDetectionImplMac>(
      mojom::FaceDetectorOptions::New());
}

std::unique_ptr<mojom::FaceDetection> CreateFaceDetectorImplMacVision(
    shape_detection::mojom::FaceDetectorOptionsPtr options) {
  return std::make_unique<FaceDetectionImplMacVision>();
}

using FaceDetectorFactory =
    base::RepeatingCallback<std::unique_ptr<mojom::FaceDetection>(
        shape_detection::mojom::FaceDetectorOptionsPtr)>;

struct TestParams {
  bool fast_mode;
  int image_width;
  int image_height;
  const char* image_path;
  size_t num_faces;
  size_t min_num_landmarks;
  size_t min_num_mouth_points;
  FaceDetectorFactory factory;
};

std::vector<TestParams> GetTestParams() {
  return {
      {false, 120, 120, "services/test/data/mona_lisa.jpg", 1, 3, 1,
       base::BindRepeating(&CreateFaceDetectorImplMac)},
      {true, 120, 120, "services/test/data/mona_lisa.jpg", 1, 3, 1,
       base::BindRepeating(&CreateFaceDetectorImplMac)},
      {false, 120, 120, "services/test/data/mona_lisa.jpg", 1, 4, 10,
       base::BindRepeating(&CreateFaceDetectorImplMacVision)},
      {false, 468, 529, "services/test/data/the_beatles.jpg", 4, 3, 1,
       base::BindRepeating(&CreateFaceDetectorImplMac)},
      {true, 468, 529, "services/test/data/the_beatles.jpg", 4, 3, 1,
       base::BindRepeating(&CreateFaceDetectorImplMac)},
      {false, 468, 529, "services/test/data/the_beatles.jpg", 4, 4, 10,
       base::BindRepeating(&CreateFaceDetectorImplMacVision)},
  };
}

}  // anonymous namespace

class FaceDetectionImplMacTest : public TestWithParam<struct TestParams> {
 public:
  ~FaceDetectionImplMacTest() override = default;

  void DetectCallback(size_t num_faces,
                      size_t min_num_landmarks,
                      size_t min_num_mouth_points,
                      std::vector<mojom::FaceDetectionResultPtr> results) {
    EXPECT_EQ(num_faces, results.size());
    for (const auto& face : results) {
      // Relying on the OS for detection means evolving results as the OS
      // improves. Do an "at least as many" check against landmarks and mouth
      // points to adapt.
      EXPECT_LE(min_num_landmarks, face->landmarks.size());
      EXPECT_EQ(mojom::LandmarkType::EYE, face->landmarks[0]->type);
      EXPECT_EQ(mojom::LandmarkType::EYE, face->landmarks[1]->type);
      EXPECT_EQ(mojom::LandmarkType::MOUTH, face->landmarks[2]->type);
      EXPECT_LE(min_num_mouth_points, face->landmarks[2]->locations.size());
    }
    Detection();
  }
  MOCK_METHOD0(Detection, void(void));

  std::unique_ptr<mojom::FaceDetection> impl_;
  base::test::SingleThreadTaskEnvironment task_environment_;
};

TEST_P(FaceDetectionImplMacTest, CreateAndDestroy) {
  impl_ = GetParam().factory.Run(mojom::FaceDetectorOptions::New());
}

TEST_P(FaceDetectionImplMacTest, ScanOneFace) {
  // Face detection test needs a GPU.
  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kUseGpuInTests)) {
    return;
  }

  auto options = shape_detection::mojom::FaceDetectorOptions::New();
  options->fast_mode = GetParam().fast_mode;
  impl_ = GetParam().factory.Run(std::move(options));

  // Load image data from test directory.
  base::FilePath image_path;
  ASSERT_TRUE(
      base::PathService::Get(base::DIR_SRC_TEST_DATA_ROOT, &image_path));
  image_path = image_path.AppendASCII(GetParam().image_path);
  ASSERT_TRUE(base::PathExists(image_path));
  std::optional<std::vector<uint8_t>> image_data =
      base::ReadFileToBytes(image_path);

  SkBitmap image = gfx::JPEGCodec::Decode(image_data.value());
  ASSERT_FALSE(image.isNull());
  ASSERT_EQ(GetParam().image_width, image.width());
  ASSERT_EQ(GetParam().image_height, image.height());

  const gfx::Size size(image.width(), image.height());
  const size_t num_bytes = size.GetArea() * 4 /* bytes per pixel */;
  // This assert assumes there is no padding in the bitmap's rowbytes
  ASSERT_EQ(num_bytes, image.computeByteSize());

  base::RunLoop run_loop;
  // Send the image to Detect() and expect the response in callback.
  EXPECT_CALL(*this, Detection())
      .WillOnce(RunOnceClosure(run_loop.QuitClosure()));
  impl_->Detect(image,
                base::BindOnce(&FaceDetectionImplMacTest::DetectCallback,
                               base::Unretained(this), GetParam().num_faces,
                               GetParam().min_num_landmarks,
                               GetParam().min_num_mouth_points));

  run_loop.Run();
}

INSTANTIATE_TEST_SUITE_P(, FaceDetectionImplMacTest, ValuesIn(GetTestParams()));

}  // shape_detection namespace