// Copyright (c) 2012 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/system/tray/system_tray.h"

#include <vector>

#include "ash/root_window_controller.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/system/status_area_widget.h"
#include "ash/system/tray/system_tray_item.h"
#include "ash/test/ash_test_base.h"
#include "base/strings/utf_string_conversions.h"
#include "ui/views/controls/label.h"
#include "ui/views/layout/fill_layout.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"

#if defined(OS_WIN)
#include "base/win/windows_version.h"
#endif

namespace ash {
namespace test {

namespace {

const int kStatusTrayOffsetFromScreenEdgeForTest = 4;

SystemTray* GetSystemTray() {
  return Shell::GetPrimaryRootWindowController()->shelf()->
      status_area_widget()->system_tray();
}

// Trivial item implementation that tracks its views for testing.
class TestItem : public SystemTrayItem {
 public:
  TestItem() : SystemTrayItem(GetSystemTray()), tray_view_(NULL) {}

  virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE {
    tray_view_ = new views::View;
    // Add a label so it has non-zero width.
    tray_view_->SetLayoutManager(new views::FillLayout);
    tray_view_->AddChildView(new views::Label(UTF8ToUTF16("Tray")));
    return tray_view_;
  }

  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE {
    default_view_ = new views::View;
    default_view_->SetLayoutManager(new views::FillLayout);
    default_view_->AddChildView(new views::Label(UTF8ToUTF16("Default")));
    return default_view_;
  }

  virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE {
    detailed_view_ = new views::View;
    detailed_view_->SetLayoutManager(new views::FillLayout);
    detailed_view_->AddChildView(new views::Label(UTF8ToUTF16("Detailed")));
    return detailed_view_;
  }

  virtual views::View* CreateNotificationView(
      user::LoginStatus status) OVERRIDE {
    notification_view_ = new views::View;
    return notification_view_;
  }

  virtual void DestroyTrayView() OVERRIDE {
    tray_view_ = NULL;
  }

  virtual void DestroyDefaultView() OVERRIDE {
    default_view_ = NULL;
  }

  virtual void DestroyDetailedView() OVERRIDE {
    detailed_view_ = NULL;
  }

  virtual void DestroyNotificationView() OVERRIDE {
    notification_view_ = NULL;
  }

  virtual void UpdateAfterLoginStatusChange(
      user::LoginStatus status) OVERRIDE {
  }

  views::View* tray_view() const { return tray_view_; }
  views::View* default_view() const { return default_view_; }
  views::View* detailed_view() const { return detailed_view_; }
  views::View* notification_view() const { return notification_view_; }

 private:
  views::View* tray_view_;
  views::View* default_view_;
  views::View* detailed_view_;
  views::View* notification_view_;
};

// Trivial item implementation that returns NULL from tray/default/detailed
// view creation methods.
class TestNoViewItem : public SystemTrayItem {
 public:
  TestNoViewItem() : SystemTrayItem(GetSystemTray()) {}

  virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE {
    return NULL;
  }

  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE {
    return NULL;
  }

  virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE {
    return NULL;
  }

  virtual views::View* CreateNotificationView(
      user::LoginStatus status) OVERRIDE {
    return NULL;
  }

  virtual void DestroyTrayView() OVERRIDE {}
  virtual void DestroyDefaultView() OVERRIDE {}
  virtual void DestroyDetailedView() OVERRIDE {}
  virtual void DestroyNotificationView() OVERRIDE {}
  virtual void UpdateAfterLoginStatusChange(
      user::LoginStatus status) OVERRIDE {
  }
};

}  // namespace

typedef AshTestBase SystemTrayTest;

TEST_F(SystemTrayTest, SystemTrayDefaultView) {
  SystemTray* tray = GetSystemTray();
  ASSERT_TRUE(tray->GetWidget());

  tray->ShowDefaultView(BUBBLE_CREATE_NEW);

  // Ensure that closing the bubble destroys it.
  ASSERT_TRUE(tray->CloseSystemBubble());
  RunAllPendingInMessageLoop();
  ASSERT_FALSE(tray->CloseSystemBubble());
}

TEST_F(SystemTrayTest, SystemTrayTestItems) {
  SystemTray* tray = GetSystemTray();
  ASSERT_TRUE(tray->GetWidget());

  TestItem* test_item = new TestItem;
  TestItem* detailed_item = new TestItem;
  tray->AddTrayItem(test_item);
  tray->AddTrayItem(detailed_item);

  // Ensure the tray views are created.
  ASSERT_TRUE(test_item->tray_view() != NULL);
  ASSERT_TRUE(detailed_item->tray_view() != NULL);

  // Ensure a default views are created.
  tray->ShowDefaultView(BUBBLE_CREATE_NEW);
  ASSERT_TRUE(test_item->default_view() != NULL);
  ASSERT_TRUE(detailed_item->default_view() != NULL);

  // Show the detailed view, ensure it's created and the default view destroyed.
  tray->ShowDetailedView(detailed_item, 0, false, BUBBLE_CREATE_NEW);
  RunAllPendingInMessageLoop();
  ASSERT_TRUE(test_item->default_view() == NULL);
  ASSERT_TRUE(detailed_item->detailed_view() != NULL);

  // Show the default view, ensure it's created and the detailed view destroyed.
  tray->ShowDefaultView(BUBBLE_CREATE_NEW);
  RunAllPendingInMessageLoop();
  ASSERT_TRUE(test_item->default_view() != NULL);
  ASSERT_TRUE(detailed_item->detailed_view() == NULL);
}

TEST_F(SystemTrayTest, SystemTrayNoViewItems) {
  SystemTray* tray = GetSystemTray();
  ASSERT_TRUE(tray->GetWidget());

  // Verify that no crashes occur on items lacking some views.
  TestNoViewItem* no_view_item = new TestNoViewItem;
  tray->AddTrayItem(no_view_item);
  tray->ShowDefaultView(BUBBLE_CREATE_NEW);
  tray->ShowDetailedView(no_view_item, 0, false, BUBBLE_USE_EXISTING);
  RunAllPendingInMessageLoop();
}

TEST_F(SystemTrayTest, TrayWidgetAutoResizes) {
  SystemTray* tray = GetSystemTray();
  ASSERT_TRUE(tray->GetWidget());

  // Add an initial tray item so that the tray gets laid out correctly.
  TestItem* initial_item = new TestItem;
  tray->AddTrayItem(initial_item);

  gfx::Size initial_size = tray->GetWidget()->GetWindowBoundsInScreen().size();

  TestItem* new_item = new TestItem;
  tray->AddTrayItem(new_item);

  gfx::Size new_size = tray->GetWidget()->GetWindowBoundsInScreen().size();

  // Adding the new item should change the size of the tray.
  EXPECT_NE(initial_size.ToString(), new_size.ToString());

  // Hiding the tray view of the new item should also change the size of the
  // tray.
  new_item->tray_view()->SetVisible(false);
  EXPECT_EQ(initial_size.ToString(),
            tray->GetWidget()->GetWindowBoundsInScreen().size().ToString());

  new_item->tray_view()->SetVisible(true);
  EXPECT_EQ(new_size.ToString(),
            tray->GetWidget()->GetWindowBoundsInScreen().size().ToString());
}

TEST_F(SystemTrayTest, SystemTrayNotifications) {
  SystemTray* tray = GetSystemTray();
  ASSERT_TRUE(tray->GetWidget());

  TestItem* test_item = new TestItem;
  TestItem* detailed_item = new TestItem;
  tray->AddTrayItem(test_item);
  tray->AddTrayItem(detailed_item);

  // Ensure the tray views are created.
  ASSERT_TRUE(test_item->tray_view() != NULL);
  ASSERT_TRUE(detailed_item->tray_view() != NULL);

  // Ensure a notification view is created.
  tray->ShowNotificationView(test_item);
  ASSERT_TRUE(test_item->notification_view() != NULL);

  // Show the default view, notification view should remain.
  tray->ShowDefaultView(BUBBLE_CREATE_NEW);
  RunAllPendingInMessageLoop();
  ASSERT_TRUE(test_item->notification_view() != NULL);

  // Show the detailed view, ensure the notificaiton view remains.
  tray->ShowDetailedView(detailed_item, 0, false, BUBBLE_CREATE_NEW);
  RunAllPendingInMessageLoop();
  ASSERT_TRUE(detailed_item->detailed_view() != NULL);
  ASSERT_TRUE(test_item->notification_view() != NULL);

  // Hide the detailed view, ensure the notification view still exists.
  ASSERT_TRUE(tray->CloseSystemBubble());
  RunAllPendingInMessageLoop();
  ASSERT_TRUE(detailed_item->detailed_view() == NULL);
  ASSERT_TRUE(test_item->notification_view() != NULL);
}

TEST_F(SystemTrayTest, BubbleCreationTypesTest) {
  SystemTray* tray = GetSystemTray();
  ASSERT_TRUE(tray->GetWidget());

  TestItem* test_item = new TestItem;
  tray->AddTrayItem(test_item);

  // Ensure the tray views are created.
  ASSERT_TRUE(test_item->tray_view() != NULL);

  // Show the default view, ensure the notification view is destroyed.
  tray->ShowDefaultView(BUBBLE_CREATE_NEW);
  RunAllPendingInMessageLoop();

  views::Widget* widget = test_item->default_view()->GetWidget();
  gfx::Rect bubble_bounds = widget->GetWindowBoundsInScreen();

  tray->ShowDetailedView(test_item, 0, true, BUBBLE_USE_EXISTING);
  RunAllPendingInMessageLoop();

  EXPECT_FALSE(test_item->default_view());

  EXPECT_EQ(bubble_bounds.ToString(), test_item->detailed_view()->GetWidget()->
      GetWindowBoundsInScreen().ToString());
  EXPECT_EQ(widget, test_item->detailed_view()->GetWidget());

  tray->ShowDefaultView(BUBBLE_USE_EXISTING);
  RunAllPendingInMessageLoop();

  EXPECT_EQ(bubble_bounds.ToString(), test_item->default_view()->GetWidget()->
      GetWindowBoundsInScreen().ToString());
  EXPECT_EQ(widget, test_item->default_view()->GetWidget());
}

// Tests that the tray is laid out properly in the widget to make sure that the
// tray extends to the correct edge of the screen.
TEST_F(SystemTrayTest, TrayBoundsInWidget) {
  internal::StatusAreaWidget* widget =
      Shell::GetPrimaryRootWindowController()->shelf()->status_area_widget();
  SystemTray* tray = widget->system_tray();

  // Test in bottom alignment. Bottom and right edges of the view should be
  // aligned with the widget.
  widget->SetShelfAlignment(SHELF_ALIGNMENT_BOTTOM);
  gfx::Rect window_bounds = widget->GetWindowBoundsInScreen();
  gfx::Rect tray_bounds = tray->GetBoundsInScreen();
  EXPECT_EQ(window_bounds.bottom(),
            tray_bounds.bottom() + kStatusTrayOffsetFromScreenEdgeForTest);
  EXPECT_EQ(window_bounds.right(), tray_bounds.right());

  // Test in the top alignment. Top and right edges should match.
  widget->SetShelfAlignment(SHELF_ALIGNMENT_TOP);
  window_bounds = widget->GetWindowBoundsInScreen();
  tray_bounds = tray->GetBoundsInScreen();
  EXPECT_EQ(window_bounds.y(),
            tray_bounds.y() - kStatusTrayOffsetFromScreenEdgeForTest);
  EXPECT_EQ(window_bounds.right(), tray_bounds.right());

  // Test in the left alignment. Left and bottom edges should match.
  widget->SetShelfAlignment(SHELF_ALIGNMENT_LEFT);
  window_bounds = widget->GetWindowBoundsInScreen();
  tray_bounds = tray->GetBoundsInScreen();
  EXPECT_EQ(window_bounds.bottom(), tray_bounds.bottom());
  EXPECT_EQ(window_bounds.x(),
            tray_bounds.x() - kStatusTrayOffsetFromScreenEdgeForTest);

  // Test in the right alignment. Right and bottom edges should match.
  widget->SetShelfAlignment(SHELF_ALIGNMENT_LEFT);
  window_bounds = widget->GetWindowBoundsInScreen();
  tray_bounds = tray->GetBoundsInScreen();
  EXPECT_EQ(window_bounds.bottom(), tray_bounds.bottom());
  EXPECT_EQ(window_bounds.right(), tray_bounds.right());
}

}  // namespace test
}  // namespace ash
