// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "gpu/command_buffer/tests/webgpu_test.h"

#include <dawn/dawn_proc.h>
#include <dawn/webgpu.h>

#include "base/bind.h"
#include "base/test/test_simple_task_runner.h"
#include "build/build_config.h"
#include "components/viz/test/test_gpu_service_holder.h"
#include "gpu/command_buffer/client/webgpu_cmd_helper.h"
#include "gpu/command_buffer/client/webgpu_implementation.h"
#include "gpu/command_buffer/service/webgpu_decoder.h"
#include "gpu/config/gpu_test_config.h"
#include "gpu/ipc/in_process_command_buffer.h"
#include "gpu/ipc/webgpu_in_process_context.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace gpu {

namespace {

void CountCallback(int* count) {
  (*count)++;
}

}  // anonymous namespace

WebGPUTest::Options::Options() = default;

WebGPUTest::WebGPUTest() = default;
WebGPUTest::~WebGPUTest() = default;

bool WebGPUTest::WebGPUSupported() const {
  // TODO(crbug.com/1172447): Re-enable on AMD when the RX 5500 XT issues are
  // resolved.
  // Win7 does not support WebGPU
  if (GPUTestBotConfig::CurrentConfigMatches("Linux AMD") ||
      GPUTestBotConfig::CurrentConfigMatches("Win7")) {
    return false;
  }

  return true;
}

bool WebGPUTest::WebGPUSharedImageSupported() const {
  // Currently WebGPUSharedImage is only implemented on Mac, Linux and Windows
#if (defined(OS_MAC) || defined(OS_LINUX) || defined(OS_CHROMEOS) || \
     defined(OS_WIN)) &&                                             \
    BUILDFLAG(USE_DAWN)
  return true;
#else
  return false;
#endif
}

void WebGPUTest::SetUp() {
  if (!WebGPUSupported()) {
    return;
  }

  gpu::GpuPreferences gpu_preferences;
  gpu_preferences.enable_webgpu = true;
#if (defined(OS_LINUX) || defined(OS_CHROMEOS)) && BUILDFLAG(USE_DAWN)
  gpu_preferences.use_vulkan = gpu::VulkanImplementationName::kNative;
  gpu_preferences.gr_context_type = gpu::GrContextType::kVulkan;
#elif defined(OS_WIN)
  // D3D shared images are only supported with passthrough command decoder.
  gpu_preferences.use_passthrough_cmd_decoder = true;
#endif
  gpu_service_holder_ =
      std::make_unique<viz::TestGpuServiceHolder>(gpu_preferences);
}

void WebGPUTest::TearDown() {
  context_.reset();
}

void WebGPUTest::Initialize(const Options& options) {
  if (!WebGPUSupported()) {
    return;
  }

  ContextCreationAttribs attributes;
  attributes.bind_generates_resource = false;
  attributes.enable_gles2_interface = false;
  attributes.context_type = CONTEXT_TYPE_WEBGPU;

  static constexpr GpuMemoryBufferManager* memory_buffer_manager = nullptr;
#if defined(OS_MAC)
  ImageFactory* image_factory = &image_factory_;
#else
  static constexpr ImageFactory* image_factory = nullptr;
#endif
  static constexpr GpuChannelManagerDelegate* channel_manager = nullptr;
  context_ = std::make_unique<WebGPUInProcessContext>();
  ContextResult result =
      context_->Initialize(gpu_service_holder_->task_executor(), attributes,
                           options.shared_memory_limits, memory_buffer_manager,
                           image_factory, channel_manager);
  ASSERT_EQ(result, ContextResult::kSuccess);

  cmd_helper_ = std::make_unique<webgpu::WebGPUCmdHelper>(
      context_->GetCommandBufferForTest());

  bool done = false;
  webgpu()->RequestAdapterAsync(
      webgpu::PowerPreference::kDefault,
      base::BindOnce(
          [](WebGPUTest* test, bool* done, int32_t adapter_id,
             const WGPUDeviceProperties& properties, const char*) {
            EXPECT_GE(adapter_id, 0);
            test->adapter_id_ = static_cast<uint32_t>(adapter_id);
            test->device_properties_ = properties;
            *done = true;
          },
          this, &done));

  while (!done) {
    RunPendingTasks();
  }

  DawnProcTable procs = webgpu()->GetProcs();
  dawnProcSetProcs(&procs);
}

webgpu::WebGPUImplementation* WebGPUTest::webgpu() const {
  return context_->GetImplementation();
}

webgpu::WebGPUCmdHelper* WebGPUTest::webgpu_cmds() const {
  return cmd_helper_.get();
}

SharedImageInterface* WebGPUTest::GetSharedImageInterface() const {
  return context_->GetCommandBufferForTest()->GetSharedImageInterface();
}

webgpu::WebGPUDecoder* WebGPUTest::GetDecoder() const {
  return context_->GetCommandBufferForTest()->GetWebGPUDecoderForTest();
}

void WebGPUTest::RunPendingTasks() {
  context_->GetTaskRunner()->RunPendingTasks();
  gpu_service_holder_->ScheduleGpuTask(base::BindOnce(
      [](webgpu::WebGPUDecoder* decoder) {
        if (decoder->HasPollingWork()) {
          decoder->PerformPollingWork();
        }
      },
      GetDecoder()));
}

void WebGPUTest::WaitForCompletion(wgpu::Device device) {
  // Insert a fence signal and wait for it to be signaled. The guarantees of
  // Dawn are that all previous operations will have been completed and more
  // importantly the callbacks will have been called.
  wgpu::Queue queue = device.GetDefaultQueue();
  wgpu::FenceDescriptor fence_desc{nullptr, 0};
  wgpu::Fence fence = queue.CreateFence(&fence_desc);

  queue.Submit(0, nullptr);
  queue.Signal(fence, 1u);

  while (fence.GetCompletedValue() < 1) {
    device.Tick();
    webgpu()->FlushCommands();
    RunPendingTasks();
  }
}

wgpu::Device WebGPUTest::GetNewDevice() {
  WGPUDevice device = nullptr;

  bool done = false;
  webgpu()->RequestDeviceAsync(
      adapter_id_, device_properties_,
      base::BindOnce(
          [](WGPUDevice* result, bool* done, WGPUDevice device) {
            *result = device;
            *done = true;
          },
          &device, &done));
  while (!done) {
    RunPendingTasks();
  }

  EXPECT_NE(device, nullptr);
  return wgpu::Device::Acquire(device);
}

TEST_F(WebGPUTest, FlushNoCommands) {
  if (!WebGPUSupported()) {
    LOG(ERROR) << "Test skipped because WebGPU isn't supported";
    return;
  }

  Initialize(WebGPUTest::Options());

  webgpu()->FlushCommands();
}

// Referred from GLES2ImplementationTest/ReportLoss
TEST_F(WebGPUTest, ReportLoss) {
  if (!WebGPUSupported()) {
    LOG(ERROR) << "Test skipped because WebGPU isn't supported";
    return;
  }

  Initialize(WebGPUTest::Options());

  GpuControlClient* webgpu_as_client = webgpu();
  int lost_count = 0;
  webgpu()->SetLostContextCallback(base::BindOnce(&CountCallback, &lost_count));
  EXPECT_EQ(0, lost_count);

  webgpu_as_client->OnGpuControlLostContext();
  // The lost context callback should be run when WebGPUImplementation is
  // notified of the loss.
  EXPECT_EQ(1, lost_count);
}

// Referred from GLES2ImplementationTest/ReportLossReentrant
TEST_F(WebGPUTest, ReportLossReentrant) {
  if (!WebGPUSupported()) {
    LOG(ERROR) << "Test skipped because WebGPU isn't supported";
    return;
  }

  Initialize(WebGPUTest::Options());

  GpuControlClient* webgpu_as_client = webgpu();
  int lost_count = 0;
  webgpu()->SetLostContextCallback(base::BindOnce(&CountCallback, &lost_count));
  EXPECT_EQ(0, lost_count);

  webgpu_as_client->OnGpuControlLostContextMaybeReentrant();
  // The lost context callback should not be run yet to avoid calling back into
  // clients re-entrantly, and having them re-enter WebGPUImplementation.
  EXPECT_EQ(0, lost_count);
}

TEST_F(WebGPUTest, RequestAdapterAfterContextLost) {
  if (!WebGPUSupported()) {
    LOG(ERROR) << "Test skipped because WebGPU isn't supported";
    return;
  }

  Initialize(WebGPUTest::Options());

  webgpu()->OnGpuControlLostContext();

  bool called = false;
  webgpu()->RequestAdapterAsync(
      webgpu::PowerPreference::kDefault,
      base::BindOnce(
          [](bool* called, int32_t adapter_id, const WGPUDeviceProperties&,
             const char*) {
            EXPECT_EQ(adapter_id, -1);
            *called = true;
          },
          &called));
  RunPendingTasks();
  EXPECT_TRUE(called);
}

TEST_F(WebGPUTest, RequestDeviceAfterContextLost) {
  if (!WebGPUSupported()) {
    LOG(ERROR) << "Test skipped because WebGPU isn't supported";
    return;
  }

  Initialize(WebGPUTest::Options());

  webgpu()->OnGpuControlLostContext();

  bool called = false;
  webgpu()->RequestDeviceAsync(GetAdapterId(), GetDeviceProperties(),
                               base::BindOnce(
                                   [](bool* called, WGPUDevice device) {
                                     EXPECT_EQ(device, nullptr);
                                     *called = true;
                                   },
                                   &called));
  RunPendingTasks();
  EXPECT_TRUE(called);
}

}  // namespace gpu