// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Copyright (c) 2015 Felix Rieseberg <feriese@microsoft.com> and
// Jason Poon <jason.poon@microsoft.com>. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE-CHROMIUM file.

#include "atom/browser/notifications/win/notification_presenter_win.h"

#include <memory>
#include <string>
#include <vector>

#include "atom/browser/notifications/win/notification_presenter_win7.h"
#include "atom/browser/notifications/win/windows_toast_notification.h"
#include "base/environment.h"
#include "base/files/file_util.h"
#include "base/hash/md5.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_restrictions.h"
#include "base/time/time.h"
#include "base/win/windows_version.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/png_codec.h"

#pragma comment(lib, "runtimeobject.lib")

namespace atom {

namespace {

bool IsDebuggingNotifications() {
  return base::Environment::Create()->HasVar("ELECTRON_DEBUG_NOTIFICATIONS");
}

bool SaveIconToPath(const SkBitmap& bitmap, const base::FilePath& path) {
  std::vector<unsigned char> png_data;
  if (!gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &png_data))
    return false;

  char* data = reinterpret_cast<char*>(&png_data[0]);
  int size = static_cast<int>(png_data.size());
  return base::WriteFile(path, data, size) == size;
}

}  // namespace

// static
NotificationPresenter* NotificationPresenter::Create() {
  auto version = base::win::GetVersion();
  if (version < base::win::VERSION_WIN8)
    return new NotificationPresenterWin7;
  if (!WindowsToastNotification::Initialize())
    return nullptr;
  std::unique_ptr<NotificationPresenterWin> presenter(
      new NotificationPresenterWin);
  if (!presenter->Init())
    return nullptr;

  if (IsDebuggingNotifications())
    LOG(INFO) << "Successfully created Windows notifications presenter";

  return presenter.release();
}

NotificationPresenterWin::NotificationPresenterWin() {}

NotificationPresenterWin::~NotificationPresenterWin() {}

bool NotificationPresenterWin::Init() {
  base::ThreadRestrictions::ScopedAllowIO allow_io;
  return temp_dir_.CreateUniqueTempDir();
}

base::string16 NotificationPresenterWin::SaveIconToFilesystem(
    const SkBitmap& icon,
    const GURL& origin) {
  std::string filename;

  if (origin.is_valid()) {
    filename = base::MD5String(origin.spec()) + ".png";
  } else {
    base::TimeTicks now = base::TimeTicks::Now();
    filename = std::to_string(now.ToInternalValue()) + ".png";
  }

  base::ThreadRestrictions::ScopedAllowIO allow_io;
  base::FilePath path = temp_dir_.GetPath().Append(base::UTF8ToUTF16(filename));
  if (base::PathExists(path))
    return path.value();
  if (SaveIconToPath(icon, path))
    return path.value();
  return base::UTF8ToUTF16(origin.spec());
}

Notification* NotificationPresenterWin::CreateNotificationObject(
    NotificationDelegate* delegate) {
  return new WindowsToastNotification(delegate, this);
}

}  // namespace atom