// 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 "chrome/test/base/ui_test_utils.h"

#include "base/file_path.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/path_service.h"
#include "base/stringprintf.h"
#include "base/time.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/views/frame/browser_view.h"
#include "chrome/browser/ui/window_snapshot/window_snapshot.h"
#include "chrome/common/chrome_paths.h"
#include "ui/base/win/foreground_helper.h"
#include "ui/ui_controls/ui_controls.h"
#include "ui/views/focus/focus_manager.h"

namespace ui_test_utils {

namespace {

const char kSnapshotBaseName[] = "ChromiumSnapshot";
const char kSnapshotExtension[] = ".png";

FilePath GetSnapshotFileName(const FilePath& snapshot_directory) {
  base::Time::Exploded the_time;

  base::Time::Now().LocalExplode(&the_time);
  std::string filename(StringPrintf("%s%04d%02d%02d%02d%02d%02d%s",
      kSnapshotBaseName, the_time.year, the_time.month, the_time.day_of_month,
      the_time.hour, the_time.minute, the_time.second, kSnapshotExtension));

  FilePath snapshot_file = snapshot_directory.AppendASCII(filename);
  if (file_util::PathExists(snapshot_file)) {
    int index = 0;
    std::string suffix;
    FilePath trial_file;
    do {
      suffix = StringPrintf(" (%d)", ++index);
      trial_file = snapshot_file.InsertBeforeExtensionASCII(suffix);
    } while (file_util::PathExists(trial_file));
    snapshot_file = trial_file;
  }
  return snapshot_file;
}

}  // namespace

bool IsViewFocused(const Browser* browser, ViewID vid) {
  BrowserWindow* browser_window = browser->window();
  DCHECK(browser_window);
  gfx::NativeWindow window = browser_window->GetNativeWindow();
  DCHECK(window);
  const views::Widget* widget =
      views::Widget::GetTopLevelWidgetForNativeView(window);
  DCHECK(widget);
  const views::FocusManager* focus_manager = widget->GetFocusManager();
  DCHECK(focus_manager);
  return focus_manager->GetFocusedView()->id() == vid;
}

void ClickOnView(const Browser* browser, ViewID vid) {
  BrowserWindow* browser_window = browser->window();
  DCHECK(browser_window);
  views::View* view =
      reinterpret_cast<BrowserView*>(browser_window)->GetViewByID(vid);
  DCHECK(view);
  MoveMouseToCenterAndPress(
      view,
      ui_controls::LEFT,
      ui_controls::DOWN | ui_controls::UP,
      MessageLoop::QuitClosure());
  RunMessageLoop();
}

void HideNativeWindow(gfx::NativeWindow window) {
  // TODO(jcampan): retrieve the NativeWidgetWin and show/hide on it instead of
  // using Windows API.
  ::ShowWindow(window, SW_HIDE);
}

bool ShowAndFocusNativeWindow(gfx::NativeWindow window) {
  // TODO(jcampan): retrieve the NativeWidgetWin and show/hide on it instead of
  // using Windows API.
  ::ShowWindow(window, SW_SHOW);

  if (GetForegroundWindow() != window) {
    VLOG(1) << "Forcefully refocusing front window";
    ui::ForegroundHelper::SetForeground(window);
  }

  // ShowWindow does not necessarily activate the window. In particular if a
  // window from another app is the foreground window then the request to
  // activate the window fails. See SetForegroundWindow for details.
  return GetForegroundWindow() == window;
}

void MoveMouseToCenterAndPress(views::View* view,
                               ui_controls::MouseButton button,
                               int state,
                               const base::Closure& task) {
  DCHECK(view);
  DCHECK(view->GetWidget());
  gfx::Point view_center(view->width() / 2, view->height() / 2);
  views::View::ConvertPointToScreen(view, &view_center);
  ui_controls::SendMouseMove(view_center.x(), view_center.y());
  ui_controls::SendMouseEventsNotifyWhenDone(button, state, task);
}

bool SaveScreenSnapshotToDirectory(const FilePath& directory,
                                   FilePath* screenshot_path) {
  bool succeeded = false;
  FilePath out_path(GetSnapshotFileName(directory));

  MONITORINFO monitor_info = {};
  monitor_info.cbSize = sizeof(monitor_info);
  HMONITOR main_monitor = MonitorFromWindow(NULL, MONITOR_DEFAULTTOPRIMARY);
  if (GetMonitorInfo(main_monitor, &monitor_info)) {
    RECT& rect = monitor_info.rcMonitor;

    std::vector<unsigned char> png_data;
    if (browser::GrabWindowSnapshot(NULL, &png_data,
                                    gfx::Rect(rect.right - rect.left,
                                              rect.bottom - rect.top)) &&
        png_data.size() <= INT_MAX) {
      int bytes = static_cast<int>(png_data.size());
      int written = file_util::WriteFile(
          out_path, reinterpret_cast<char*>(&png_data[0]), bytes);
      succeeded = (written == bytes);
    }
  }

  if (succeeded && screenshot_path != NULL)
    *screenshot_path = out_path;

  return succeeded;
}

bool SaveScreenSnapshotToDesktop(FilePath* screenshot_path) {
  FilePath desktop;

  return PathService::Get(chrome::DIR_USER_DESKTOP, &desktop) &&
      SaveScreenSnapshotToDirectory(desktop, screenshot_path);
}

}  // namespace ui_test_utils