// Copyright 2015 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 <stdint.h>

#include "base/macros.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/test/scoped_task_environment.h"
#include "base/test/test_mock_time_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "components/viz/common/frame_sinks/begin_frame_args.h"
#include "components/viz/common/surfaces/parent_local_surface_id_allocator.h"
#include "components/viz/service/surfaces/surface_manager.h"
#include "components/viz/test/begin_frame_args_test.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/compositor/compositor.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/test/draw_waiter_for_test.h"
#include "ui/compositor/test/in_process_context_factory.h"
#include "ui/compositor/test/test_context_factories.h"

using testing::Mock;
using testing::_;

namespace ui {
namespace {

class CompositorTest : public testing::Test {
 public:
  CompositorTest() {}
  ~CompositorTest() override {}

  void SetUp() override {
    context_factories_ = std::make_unique<TestContextFactories>(false);

    compositor_ = std::make_unique<Compositor>(
        context_factories_->GetContextFactoryPrivate()->AllocateFrameSinkId(),
        context_factories_->GetContextFactory(),
        context_factories_->GetContextFactoryPrivate(), CreateTaskRunner(),
        false /* enable_pixel_canvas */);
    compositor_->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
  }

  void TearDown() override {
    compositor_.reset();
    context_factories_.reset();
  }

  void DestroyCompositor() { compositor_.reset(); }

 protected:
  virtual scoped_refptr<base::SingleThreadTaskRunner> CreateTaskRunner() = 0;

  Compositor* compositor() { return compositor_.get(); }

 private:
  std::unique_ptr<TestContextFactories> context_factories_;
  std::unique_ptr<Compositor> compositor_;

  DISALLOW_COPY_AND_ASSIGN(CompositorTest);
};

// For tests that control time.
class CompositorTestWithMockedTime : public CompositorTest {
 protected:
  scoped_refptr<base::SingleThreadTaskRunner> CreateTaskRunner() override {
    task_runner_ = new base::TestMockTimeTaskRunner;
    return task_runner_;
  }

  base::TestMockTimeTaskRunner* task_runner() { return task_runner_.get(); }

 protected:
  scoped_refptr<base::TestMockTimeTaskRunner> task_runner_;
};

// For tests that run on a real MessageLoop with real time.
class CompositorTestWithMessageLoop : public CompositorTest {
 public:
  CompositorTestWithMessageLoop()
      : scoped_task_environment_(
            base::test::ScopedTaskEnvironment::MainThreadType::UI) {}
  ~CompositorTestWithMessageLoop() override = default;

 protected:
  scoped_refptr<base::SingleThreadTaskRunner> CreateTaskRunner() override {
    task_runner_ = base::ThreadTaskRunnerHandle::Get();
    return task_runner_;
  }

  base::SequencedTaskRunner* task_runner() { return task_runner_.get(); }

 private:
  base::test::ScopedTaskEnvironment scoped_task_environment_;
  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
};

}  // namespace

TEST_F(CompositorTestWithMessageLoop, OutputColorMatrix) {
  auto root_layer = std::make_unique<Layer>(ui::LAYER_SOLID_COLOR);
  viz::ParentLocalSurfaceIdAllocator allocator;
  allocator.GenerateId();
  root_layer->SetBounds(gfx::Rect(10, 10));
  compositor()->SetRootLayer(root_layer.get());
  compositor()->SetScaleAndSize(1.0f, gfx::Size(10, 10),
                                allocator.GetCurrentLocalSurfaceIdAllocation());
  DCHECK(compositor()->IsVisible());

  // Set a non-identity color matrix on the compistor display, and expect it to
  // be set on the context factory.
  SkMatrix44 color_matrix(SkMatrix44::kIdentity_Constructor);
  color_matrix.set(1, 1, 0.7f);
  color_matrix.set(2, 2, 0.4f);
  compositor()->SetDisplayColorMatrix(color_matrix);
  InProcessContextFactory* context_factory_private =
      static_cast<InProcessContextFactory*>(
          compositor()->context_factory_private());
  compositor()->ScheduleDraw();
  DrawWaiterForTest::WaitForCompositingEnded(compositor());
  EXPECT_EQ(color_matrix,
            context_factory_private->GetOutputColorMatrix(compositor()));

  // Simulate a lost context by releasing the output surface and setting it on
  // the compositor again. Expect that the same color matrix will be set again
  // on the context factory.
  context_factory_private->ResetOutputColorMatrixToIdentity(compositor());
  compositor()->SetVisible(false);
  EXPECT_EQ(gfx::kNullAcceleratedWidget,
            compositor()->ReleaseAcceleratedWidget());
  compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
  compositor()->SetVisible(true);
  compositor()->ScheduleDraw();
  DrawWaiterForTest::WaitForCompositingEnded(compositor());
  EXPECT_EQ(color_matrix,
            context_factory_private->GetOutputColorMatrix(compositor()));
  compositor()->SetRootLayer(nullptr);
}

TEST_F(CompositorTestWithMockedTime,
       ReleaseWidgetWithOutputSurfaceNeverCreated) {
  compositor()->SetVisible(false);
  EXPECT_EQ(gfx::kNullAcceleratedWidget,
            compositor()->ReleaseAcceleratedWidget());
  compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
  compositor()->SetVisible(true);
}

#if defined(OS_WIN)
// TODO(crbug.com/608436): Flaky on windows trybots
#define MAYBE_CreateAndReleaseOutputSurface \
  DISABLED_CreateAndReleaseOutputSurface
#else
#define MAYBE_CreateAndReleaseOutputSurface CreateAndReleaseOutputSurface
#endif
TEST_F(CompositorTestWithMessageLoop, MAYBE_CreateAndReleaseOutputSurface) {
  std::unique_ptr<Layer> root_layer(new Layer(ui::LAYER_SOLID_COLOR));
  viz::ParentLocalSurfaceIdAllocator allocator;
  allocator.GenerateId();
  root_layer->SetBounds(gfx::Rect(10, 10));
  compositor()->SetRootLayer(root_layer.get());
  compositor()->SetScaleAndSize(1.0f, gfx::Size(10, 10),
                                allocator.GetCurrentLocalSurfaceIdAllocation());
  DCHECK(compositor()->IsVisible());
  compositor()->ScheduleDraw();
  DrawWaiterForTest::WaitForCompositingEnded(compositor());
  compositor()->SetVisible(false);
  EXPECT_EQ(gfx::kNullAcceleratedWidget,
            compositor()->ReleaseAcceleratedWidget());
  compositor()->SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
  compositor()->SetVisible(true);
  compositor()->ScheduleDraw();
  DrawWaiterForTest::WaitForCompositingEnded(compositor());
  compositor()->SetRootLayer(nullptr);
}

}  // namespace ui