// Copyright 2013 The Flutter 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 "flutter/flow/testing/mock_layer.h"

#include "flutter/flow/testing/layer_test.h"
#include "flutter/fml/macros.h"
#include "flutter/testing/mock_canvas.h"

namespace flutter {
namespace testing {

using MockLayerTest = LayerTest;

#ifndef NDEBUG
TEST_F(MockLayerTest, PaintBeforePreollDies) {
  SkPath path = SkPath().addRect(5.0f, 6.0f, 20.5f, 21.5f);
  auto layer = std::make_shared<MockLayer>(path, SkPaint());

  EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
                            "needs_painting\\(\\)");
}

TEST_F(MockLayerTest, PaintingEmptyLayerDies) {
  auto layer = std::make_shared<MockLayer>(SkPath(), SkPaint());

  layer->Preroll(preroll_context(), SkMatrix());
  EXPECT_EQ(layer->paint_bounds(), SkPath().getBounds());

  EXPECT_DEATH_IF_SUPPORTED(layer->Paint(paint_context()),
                            "needs_painting\\(\\)");
}
#endif

TEST_F(MockLayerTest, SimpleParams) {
  const SkPath path = SkPath().addRect(5.0f, 6.0f, 20.5f, 21.5f);
  const SkPaint paint = SkPaint(SkColors::kBlue);
  const SkMatrix start_matrix = SkMatrix::MakeTrans(1.0f, 2.0f);
  const SkMatrix scale_matrix = SkMatrix::MakeScale(0.5f, 0.5f);
  const SkRect cull_rect = SkRect::MakeWH(5.0f, 5.0f);
  const float parent_elevation = 5.0f;
  const bool parent_has_platform_view = true;
  auto layer = std::make_shared<MockLayer>(path, paint);

  preroll_context()->mutators_stack.PushTransform(scale_matrix);
  preroll_context()->cull_rect = cull_rect;
  preroll_context()->total_elevation = parent_elevation;
  preroll_context()->has_platform_view = parent_has_platform_view;
  layer->Preroll(preroll_context(), start_matrix);
  EXPECT_EQ(preroll_context()->has_platform_view, false);
  EXPECT_EQ(layer->paint_bounds(), path.getBounds());
  EXPECT_TRUE(layer->needs_painting());
  EXPECT_FALSE(layer->needs_system_composite());
  EXPECT_EQ(layer->parent_mutators(), std::vector{Mutator(scale_matrix)});
  EXPECT_EQ(layer->parent_matrix(), start_matrix);
  EXPECT_EQ(layer->parent_cull_rect(), cull_rect);
  EXPECT_EQ(layer->parent_elevation(), parent_elevation);
  EXPECT_EQ(layer->parent_has_platform_view(), parent_has_platform_view);

  layer->Paint(paint_context());
  EXPECT_EQ(mock_canvas().draw_calls(),
            std::vector({MockCanvas::DrawCall{
                0, MockCanvas::DrawPathData{path, paint}}}));
}

TEST_F(MockLayerTest, FakePlatformView) {
  auto layer = std::make_shared<MockLayer>(SkPath(), SkPaint(),
                                           true /* fake_has_platform_view */);
  EXPECT_EQ(preroll_context()->has_platform_view, false);

  layer->Preroll(preroll_context(), SkMatrix());
  EXPECT_EQ(preroll_context()->has_platform_view, true);
}

TEST_F(MockLayerTest, FakeSystemComposite) {
  auto layer = std::make_shared<MockLayer>(
      SkPath(), SkPaint(), false /* fake_has_platform_view */,
      true /* fake_needs_system_composite */);
  EXPECT_EQ(layer->needs_system_composite(), false);

  layer->Preroll(preroll_context(), SkMatrix());
  EXPECT_EQ(layer->needs_system_composite(), true);
}

}  // namespace testing
}  // namespace flutter