// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/ui/webui/top_chrome/webui_contents_wrapper.h"

#include <memory>
#include <utility>

#include "base/memory/weak_ptr.h"
#include "chrome/test/base/testing_profile.h"
#include "chrome/test/views/chrome_views_test_base.h"
#include "components/input/native_web_keyboard_event.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/site_instance.h"
#include "content/public/common/content_client.h"
#include "content/public/test/browser_task_environment.h"
#include "content/public/test/test_renderer_host.h"
#include "content/public/test/web_contents_tester.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/mojom/page/draggable_region.mojom.h"
#include "third_party/blink/public/mojom/window_features/window_features.mojom.h"

namespace views {

namespace {

class MockHost : public WebUIContentsWrapper::Host {
 public:
  // WebUIContentsWrapper::Host:
  void ShowUI() override { ++show_ui_called_; }
  void CloseUI() override { ++close_ui_called_; }
  void ShowCustomContextMenu(
      gfx::Point point,
      std::unique_ptr<ui::MenuModel> menu_model) override {
    ++show_custom_context_menu_called_;
  }
  void ResizeDueToAutoResize(content::WebContents* source,
                             const gfx::Size& new_size) override {
    ++resize_due_to_auto_resize_called_;
  }
  void DraggableRegionsChanged(
      const std::vector<blink::mojom::DraggableRegionPtr>& regions,
      content::WebContents* contents) override {
    ++draggable_regions_changed_called_;
  }
  content::WebContents* AddNewContents(
      content::WebContents* source,
      std::unique_ptr<content::WebContents> new_contents,
      const GURL& target_url,
      WindowOpenDisposition disposition,
      const blink::mojom::WindowFeatures& window_features,
      bool user_gesture,
      bool* was_blocked) override {
    ++add_new_contents_called_;
    return nullptr;
  }

  base::WeakPtr<MockHost> GetWeakPtr() {
    return weak_ptr_factory_.GetWeakPtr();
  }

  int show_ui_called() const { return show_ui_called_; }
  int close_ui_called() const { return close_ui_called_; }
  int show_custom_context_menu_called() const {
    return show_custom_context_menu_called_;
  }
  int resize_due_to_auto_resize_called() const {
    return resize_due_to_auto_resize_called_;
  }
  int draggable_regions_changed_called() const {
    return draggable_regions_changed_called_;
  }
  int add_new_contents_called() const { return add_new_contents_called_; }

 private:
  int show_ui_called_ = 0;
  int close_ui_called_ = 0;
  int show_custom_context_menu_called_ = 0;
  int resize_due_to_auto_resize_called_ = 0;
  int draggable_regions_changed_called_ = 0;
  int add_new_contents_called_ = 0;
  base::WeakPtrFactory<MockHost> weak_ptr_factory_{this};
};

class TestWebUIContentsWrapper : public WebUIContentsWrapper {
 public:
  explicit TestWebUIContentsWrapper(Profile* profile)
      : WebUIContentsWrapper(GURL(""), profile, 0, true, true, true, "Test") {}
  ~TestWebUIContentsWrapper() override = default;

  // WebUIContentsWrapper:
  void ReloadWebContents() override {}
  base::WeakPtr<WebUIContentsWrapper> GetWeakPtr() override {
    return weak_ptr_factory_.GetWeakPtr();
  }

 private:
  base::WeakPtrFactory<TestWebUIContentsWrapper> weak_ptr_factory_{this};
};

}  // namespace

namespace test {

class WebUIContentsWrapperTest : public ChromeViewsTestBase {
 public:
  WebUIContentsWrapperTest() = default;
  WebUIContentsWrapperTest(const WebUIContentsWrapperTest&) = delete;
  WebUIContentsWrapperTest& operator=(const WebUIContentsWrapperTest&) = delete;
  ~WebUIContentsWrapperTest() override = default;

  // ViewsTestBase:
  void SetUp() override {
    ChromeViewsTestBase::SetUp();
    profile_ = std::make_unique<TestingProfile>();

    scoped_refptr<content::SiteInstance> instance =
        content::SiteInstance::Create(profile_.get());
    instance->GetOrCreateProcessForTesting()->Init();
    auto test_contents = content::WebContentsTester::CreateTestWebContents(
        profile_.get(), std::move(instance));

    contents_wrapper_ =
        std::make_unique<TestWebUIContentsWrapper>(profile_.get());
    contents_wrapper_->SetWebContentsForTesting(std::move(test_contents));
  }

  WebUIContentsWrapper* contents_wrapper() { return contents_wrapper_.get(); }

 private:
  content::RenderViewHostTestEnabler test_render_host_factories_;
  std::unique_ptr<TestingProfile> profile_;
  std::unique_ptr<WebUIContentsWrapper> contents_wrapper_;
};

TEST_F(WebUIContentsWrapperTest, CallsHostForShowUIAndCloseUIWhenPresent) {
  MockHost host;
  EXPECT_EQ(0, host.show_ui_called());
  EXPECT_EQ(0, host.close_ui_called());

  contents_wrapper()->SetHost(host.GetWeakPtr());
  contents_wrapper()->ShowUI();
  contents_wrapper()->CloseUI();
  EXPECT_EQ(1, host.show_ui_called());
  EXPECT_EQ(1, host.close_ui_called());

  contents_wrapper()->SetHost(nullptr);
  contents_wrapper()->ShowUI();
  contents_wrapper()->CloseUI();
  EXPECT_EQ(1, host.show_ui_called());
  EXPECT_EQ(1, host.close_ui_called());
}

TEST_F(WebUIContentsWrapperTest, CallsShowContextMenu) {
  MockHost host;
  EXPECT_EQ(0, host.show_custom_context_menu_called());

  contents_wrapper()->SetHost(host.GetWeakPtr());
  contents_wrapper()->ShowContextMenu(gfx::Point(0, 0), nullptr);
  EXPECT_EQ(1, host.show_custom_context_menu_called());

  contents_wrapper()->SetHost(nullptr);
  contents_wrapper()->ShowContextMenu(gfx::Point(0, 0), nullptr);
  EXPECT_EQ(1, host.show_custom_context_menu_called());
}

TEST_F(WebUIContentsWrapperTest, NotifiesHostWhenResized) {
  MockHost host;
  EXPECT_EQ(0, host.resize_due_to_auto_resize_called());

  contents_wrapper()->SetHost(host.GetWeakPtr());
  contents_wrapper()->ResizeDueToAutoResize(contents_wrapper()->web_contents(),
                                            gfx::Size());
  EXPECT_EQ(1, host.resize_due_to_auto_resize_called());

  contents_wrapper()->SetHost(nullptr);
  contents_wrapper()->ResizeDueToAutoResize(contents_wrapper()->web_contents(),
                                            gfx::Size());
  EXPECT_EQ(1, host.resize_due_to_auto_resize_called());
}

TEST_F(WebUIContentsWrapperTest, EscapeKeyClosesHost) {
  MockHost host;
  contents_wrapper()->SetHost(host.GetWeakPtr());

  input::NativeWebKeyboardEvent event(
      blink::WebInputEvent::Type::kRawKeyDown,
      blink::WebInputEvent::kNoModifiers,
      blink::WebInputEvent::GetStaticTimeStampForTests());
  event.windows_key_code = ui::VKEY_ESCAPE;

  EXPECT_EQ(0, host.close_ui_called());
  contents_wrapper()
      ->web_contents()
      ->GetRenderWidgetHostView()
      ->GetRenderWidgetHost()
      ->ForwardKeyboardEvent(event);
  EXPECT_EQ(1, host.close_ui_called());
}

TEST_F(WebUIContentsWrapperTest, ClosesHostOnWebContentsCrash) {
  MockHost host;
  contents_wrapper()->SetHost(host.GetWeakPtr());
  EXPECT_EQ(0, host.close_ui_called());

  contents_wrapper()->PrimaryMainFrameRenderProcessGone(
      base::TerminationStatus::TERMINATION_STATUS_PROCESS_CRASHED);

  EXPECT_EQ(1, host.close_ui_called());
}

TEST_F(WebUIContentsWrapperTest, NotifiesHostWhenDraggableRegionsUpdated) {
  MockHost host;
  EXPECT_EQ(0, host.draggable_regions_changed_called());

  // Ensure updates are propagated to the host.
  std::vector<blink::mojom::DraggableRegionPtr> regions;
  auto region_rect = blink::mojom::DraggableRegion::New();
  region_rect->bounds = {10, 10, 100, 100};
  region_rect->draggable = true;
  regions.push_back(std::move(region_rect));
  contents_wrapper()->SetHost(host.GetWeakPtr());
  contents_wrapper()->DraggableRegionsChanged(
      regions, contents_wrapper()->web_contents());
  EXPECT_EQ(1, host.draggable_regions_changed_called());

  // After the host has been unset it should no longer receive updates.
  contents_wrapper()->SetHost(nullptr);
  contents_wrapper()->DraggableRegionsChanged(
      regions, contents_wrapper()->web_contents());
  EXPECT_EQ(1, host.draggable_regions_changed_called());

  // When a draggable region has been received and a host is set it should be
  // notified of the most recently set draggable region.
  contents_wrapper()->SetHost(host.GetWeakPtr());
  EXPECT_EQ(2, host.draggable_regions_changed_called());
}

// Tests that when auto-resize is enabled (this is configured in
// TestWebUIContentsWrapper), the host is resize when SetHost() is called if the
// frame size is available.
TEST_F(WebUIContentsWrapperTest, HostIsResizedOnSetHost) {
  MockHost host;
  contents_wrapper()->SetHost(host.GetWeakPtr());
  // The render frame size is unset so the host is not resized.
  EXPECT_EQ(0, host.resize_due_to_auto_resize_called());
  contents_wrapper()->SetHost(nullptr);

  // The frame size is updated and therefore the host should be resized.
  content::WebContentsTester::For(contents_wrapper()->web_contents())
      ->SetMainFrameSize(gfx::Size(100, 100));
  contents_wrapper()->SetHost(host.GetWeakPtr());
  EXPECT_EQ(1, host.resize_due_to_auto_resize_called());
}

TEST_F(WebUIContentsWrapperTest, HostNotifiedOnAddNewContents) {
  MockHost host;
  EXPECT_EQ(0, host.add_new_contents_called());

  contents_wrapper()->SetHost(host.GetWeakPtr());
  bool blocked;
  contents_wrapper()->AddNewContents(
      nullptr /* source */,
      std::unique_ptr<content::WebContents>() /* new_contents */,
      GURL() /* target_url */,
      WindowOpenDisposition::CURRENT_TAB /* disposition */,
      blink::mojom::WindowFeatures() /* window_features */,
      false /* user_gesture */, &blocked /* was_blocked */);
  EXPECT_EQ(1, host.add_new_contents_called());

  contents_wrapper()->SetHost(nullptr);
  contents_wrapper()->AddNewContents(
      nullptr /* source */,
      std::unique_ptr<content::WebContents>() /* new_contents */,
      GURL() /* target_url */,
      WindowOpenDisposition::CURRENT_TAB /* disposition */,
      blink::mojom::WindowFeatures() /* window_features */,
      false /* user_gesture */, &blocked /* was_blocked */);
  EXPECT_EQ(1, host.add_new_contents_called());
}
}  // namespace test
}  // namespace views