// Copyright (c) 2013 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 "ash/touch/touch_observer_hud.h"

#include "ash/public/cpp/ash_switches.h"
#include "ash/root_window_controller.h"
#include "ash/shell.h"
#include "ash/test/ash_test_base.h"
#include "ash/touch/touch_devices_controller.h"
#include "ash/touch/touch_observer_hud.h"
#include "base/command_line.h"
#include "base/format_macros.h"
#include "base/strings/stringprintf.h"
#include "ui/aura/window.h"
#include "ui/display/manager/display_manager.h"
#include "ui/display/test/display_manager_test_api.h"
#include "ui/views/widget/widget.h"

namespace ash {

class TouchObserverHUDTest : public AshTestBase {
 public:
  TouchObserverHUDTest() = default;
  ~TouchObserverHUDTest() override = default;

  void SetUp() override {
    // Add ash-touch-hud flag to enable debug touch HUD. This flag should be set
    // before Ash environment is set up.
    base::CommandLine::ForCurrentProcess()->AppendSwitch(
        ash::switches::kAshTouchHud);

    AshTestBase::SetUp();

    // Initialize display infos. They should be initialized after Ash
    // environment is set up, i.e., after AshTestBase::SetUp().
    internal_display_id_ =
        display::test::DisplayManagerTestApi(Shell::Get()->display_manager())
            .SetFirstDisplayAsInternalDisplay();
    external_display_id_ = 10;
    mirrored_display_id_ = 11;

    internal_display_info_ =
        CreateDisplayInfo(internal_display_id_, gfx::Rect(0, 0, 500, 500));
    external_display_info_ =
        CreateDisplayInfo(external_display_id_, gfx::Rect(1, 1, 100, 100));
    mirrored_display_info_ =
        CreateDisplayInfo(mirrored_display_id_, gfx::Rect(0, 0, 100, 100));
  }

  display::Display GetPrimaryDisplay() {
    return display::Screen::GetScreen()->GetPrimaryDisplay();
  }

  void SetupSingleDisplay() {
    display_info_list_.clear();
    display_info_list_.push_back(internal_display_info_);
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void SetupDualDisplays() {
    display_info_list_.clear();
    display_info_list_.push_back(internal_display_info_);
    display_info_list_.push_back(external_display_info_);
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void SetInternalAsPrimary() {
    GetWindowTreeHostManager()->SetPrimaryDisplayId(internal_display_id_);
  }

  void SetExternalAsPrimary() {
    GetWindowTreeHostManager()->SetPrimaryDisplayId(external_display_id_);
  }

  void MirrorDisplays() {
    DCHECK_EQ(2U, display_info_list_.size());
    DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
    DCHECK_EQ(external_display_id_, display_info_list_[1].id());
    display_info_list_[1] = mirrored_display_info_;
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void UnmirrorDisplays() {
    DCHECK_EQ(2U, display_info_list_.size());
    DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
    DCHECK_EQ(mirrored_display_id_, display_info_list_[1].id());
    display_info_list_[1] = external_display_info_;
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void RemoveInternalDisplay() {
    DCHECK_LT(0U, display_info_list_.size());
    DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
    display_info_list_.erase(display_info_list_.begin());
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void RemoveExternalDisplay() {
    DCHECK_EQ(2U, display_info_list_.size());
    display_info_list_.pop_back();
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void AddInternalDisplay() {
    DCHECK_EQ(0U, display_info_list_.size());
    display_info_list_.push_back(internal_display_info_);
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void AddExternalDisplay() {
    DCHECK_EQ(1U, display_info_list_.size());
    display_info_list_.push_back(external_display_info_);
    display_manager()->OnNativeDisplaysChanged(display_info_list_);
  }

  void CheckInternalDisplay() {
    ASSERT_TRUE(GetInternalTouchHud());
    EXPECT_EQ(internal_display_id(), GetInternalTouchHud()->display_id_);
    EXPECT_EQ(GetInternalRootWindow(),
              GetRootWindowForTouchHud(GetInternalTouchHud()));
    EXPECT_EQ(GetInternalRootWindow(),
              GetWidgetForTouchHud(GetInternalTouchHud())
                  ->GetNativeView()
                  ->GetRootWindow());
    EXPECT_EQ(GetInternalDisplay().size(),
              GetWidgetForTouchHud(GetInternalTouchHud())
                  ->GetWindowBoundsInScreen()
                  .size());
  }

  void CheckExternalDisplay() {
    ASSERT_TRUE(GetExternalTouchHud());
    EXPECT_EQ(external_display_id(), GetExternalTouchHud()->display_id_);
    EXPECT_EQ(GetExternalRootWindow(),
              GetRootWindowForTouchHud(GetExternalTouchHud()));
    EXPECT_EQ(GetExternalRootWindow(),
              GetWidgetForTouchHud(GetExternalTouchHud())
                  ->GetNativeView()
                  ->GetRootWindow());
    EXPECT_EQ(GetExternalDisplay().size(),
              GetWidgetForTouchHud(GetExternalTouchHud())
                  ->GetWindowBoundsInScreen()
                  .size());
  }

  int64_t internal_display_id() const { return internal_display_id_; }

  int64_t external_display_id() const { return external_display_id_; }

 protected:

  WindowTreeHostManager* GetWindowTreeHostManager() {
    return Shell::Get()->window_tree_host_manager();
  }

  const display::Display& GetInternalDisplay() {
    return display_manager()->GetDisplayForId(internal_display_id_);
  }

  const display::Display& GetExternalDisplay() {
    return display_manager()->GetDisplayForId(external_display_id_);
  }

  aura::Window* GetInternalRootWindow() {
    return Shell::GetRootWindowForDisplayId(internal_display_id_);
  }

  aura::Window* GetExternalRootWindow() {
    return Shell::GetRootWindowForDisplayId(external_display_id_);
  }

  aura::Window* GetPrimaryRootWindow() {
    const display::Display& display = GetPrimaryDisplay();
    return Shell::GetRootWindowForDisplayId(display.id());
  }

  aura::Window* GetSecondaryRootWindow() {
    const display::Display& display = display_manager()->GetSecondaryDisplay();
    return Shell::GetRootWindowForDisplayId(display.id());
  }

  RootWindowController* GetInternalRootController() {
    aura::Window* root = GetInternalRootWindow();
    return RootWindowController::ForWindow(root);
  }

  RootWindowController* GetExternalRootController() {
    aura::Window* root = GetExternalRootWindow();
    return RootWindowController::ForWindow(root);
  }

  RootWindowController* GetPrimaryRootController() {
    aura::Window* root = GetPrimaryRootWindow();
    return RootWindowController::ForWindow(root);
  }

  RootWindowController* GetSecondaryRootController() {
    aura::Window* root = GetSecondaryRootWindow();
    return RootWindowController::ForWindow(root);
  }

  TouchObserverHUD* GetInternalTouchHud() {
    return GetInternalRootController()->touch_observer_hud();
  }

  TouchObserverHUD* GetExternalTouchHud() {
    return GetExternalRootController()->touch_observer_hud();
  }

  TouchObserverHUD* GetPrimaryTouchHud() {
    return GetPrimaryRootController()->touch_observer_hud();
  }

  TouchObserverHUD* GetSecondaryTouchHud() {
    return GetSecondaryRootController()->touch_observer_hud();
  }

  display::ManagedDisplayInfo CreateDisplayInfo(int64_t id,
                                                const gfx::Rect& bounds) {
    display::ManagedDisplayInfo info(id, base::StringPrintf("x-%" PRId64, id),
                                     false);
    info.SetBounds(bounds);
    return info;
  }

  aura::Window* GetRootWindowForTouchHud(TouchObserverHUD* hud) {
    return hud->root_window_;
  }

  views::Widget* GetWidgetForTouchHud(TouchObserverHUD* hud) {
    return hud->widget_;
  }

  int64_t internal_display_id_;
  int64_t external_display_id_;
  int64_t mirrored_display_id_;
  display::ManagedDisplayInfo internal_display_info_;
  display::ManagedDisplayInfo external_display_info_;
  display::ManagedDisplayInfo mirrored_display_info_;

  std::vector<display::ManagedDisplayInfo> display_info_list_;

  DISALLOW_COPY_AND_ASSIGN(TouchObserverHUDTest);
};

// Checks if debug touch HUD is correctly initialized for a single display.
TEST_F(TouchObserverHUDTest, SingleDisplay) {
  // Setup a single display setting.
  SetupSingleDisplay();

  // Check if touch HUD is set correctly and associated with appropriate
  // display.
  CheckInternalDisplay();
}

// Checks if debug touch HUDs are correctly initialized for two displays.
TEST_F(TouchObserverHUDTest, DualDisplays) {
  // Setup a dual display setting.
  SetupDualDisplays();

  // Check if touch HUDs are set correctly and associated with appropriate
  // displays.
  CheckInternalDisplay();
  CheckExternalDisplay();
}

// Checks if debug touch HUDs are correctly handled when primary display is
// changed.
TEST_F(TouchObserverHUDTest, SwapPrimaryDisplay) {
  // Setup a dual display setting.
  SetupDualDisplays();

  // Set the primary display to the external one.
  SetExternalAsPrimary();

  // Check if displays' touch HUDs are not swapped as root windows are.
  EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
  EXPECT_EQ(internal_display_id(),
            display_manager()->GetSecondaryDisplay().id());
  CheckInternalDisplay();
  CheckExternalDisplay();

  // Set the primary display back to the internal one.
  SetInternalAsPrimary();

  // Check if displays' touch HUDs are not swapped back as root windows are.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  EXPECT_EQ(external_display_id(),
            display_manager()->GetSecondaryDisplay().id());
  CheckInternalDisplay();
  CheckExternalDisplay();
}

// Checks if debug touch HUDs are correctly handled when displays are mirrored.
TEST_F(TouchObserverHUDTest, MirrorDisplays) {
  // Disable restoring mirror mode to prevent interference from previous
  // display configuration.
  display_manager()->set_disable_restoring_mirror_mode_for_test(true);

  // Setup a dual display setting.
  SetupDualDisplays();

  // Mirror displays.
  MirrorDisplays();

  // Check if the internal display is intact.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  CheckInternalDisplay();

  // Unmirror displays.
  UnmirrorDisplays();

  // Check if external display is added back correctly.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  EXPECT_EQ(external_display_id(),
            display_manager()->GetSecondaryDisplay().id());
  CheckInternalDisplay();
  CheckExternalDisplay();

  display_manager()->set_disable_restoring_mirror_mode_for_test(false);
}

// Checks if debug touch HUDs are correctly handled when displays are mirrored
// after setting the external display as the primary one.
TEST_F(TouchObserverHUDTest, SwapPrimaryThenMirrorDisplays) {
  display_manager()->set_disable_restoring_mirror_mode_for_test(true);

  // Setup a dual display setting.
  SetupDualDisplays();

  // Set the primary display to the external one.
  SetExternalAsPrimary();

  // Mirror displays.
  MirrorDisplays();

  // Check if the internal display is set as the primary one.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  CheckInternalDisplay();

  // Unmirror displays.
  UnmirrorDisplays();

  // Check if the external display is added back as the primary display and
  // touch HUDs are set correctly.
  EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
  EXPECT_EQ(internal_display_id(),
            display_manager()->GetSecondaryDisplay().id());
  CheckInternalDisplay();
  CheckExternalDisplay();

  display_manager()->set_disable_restoring_mirror_mode_for_test(false);
}

// Checks if debug touch HUDs are correctly handled when the external display,
// which is the secondary one, is removed.
TEST_F(TouchObserverHUDTest, RemoveSecondaryDisplay) {
  // Setup a dual display setting.
  SetupDualDisplays();

  // Remove external display which is the secondary one.
  RemoveExternalDisplay();

  // Check if the internal display is intact.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  CheckInternalDisplay();

  // Add external display back.
  AddExternalDisplay();

  // Check if displays' touch HUDs are set correctly.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  EXPECT_EQ(external_display_id(),
            display_manager()->GetSecondaryDisplay().id());
  CheckInternalDisplay();
  CheckExternalDisplay();
}

// Checks if debug touch HUDs are correctly handled when the external display,
// which is set as the primary display, is removed.
TEST_F(TouchObserverHUDTest, RemovePrimaryDisplay) {
  // Setup a dual display setting.
  SetupDualDisplays();

  // Set the primary display to the external one.
  SetExternalAsPrimary();

  // Remove the external display which is the primary display.
  RemoveExternalDisplay();

  // Check if the internal display is set as the primary one.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  CheckInternalDisplay();

  // Add the external display back.
  AddExternalDisplay();

  // Check if the external display is set as primary and touch HUDs are set
  // correctly.
  EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
  EXPECT_EQ(internal_display_id(),
            display_manager()->GetSecondaryDisplay().id());
  CheckInternalDisplay();
  CheckExternalDisplay();
}

// Checks if debug touch HUDs are correctly handled when all displays are
// removed.
TEST_F(TouchObserverHUDTest, Headless) {
  // Setup a single display setting.
  SetupSingleDisplay();

  // Remove the only display which is the internal one.
  RemoveInternalDisplay();

  // Add the internal display back.
  AddInternalDisplay();

  // Check if the display's touch HUD is set correctly.
  EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
  CheckInternalDisplay();
}

}  // namespace ash