// 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 "ui/message_center/message_popup_bubble.h"

#include "ui/message_center/message_view.h"
#include "ui/message_center/message_view_factory.h"
#include "ui/views/bubble/tray_bubble_view.h"
#include "ui/views/layout/box_layout.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"

namespace message_center {

const int kAutocloseDelaySeconds = 5;

// Popup notifications contents.
class PopupBubbleContentsView : public views::View {
 public:
  explicit PopupBubbleContentsView(NotificationList::Delegate* list_delegate)
      : list_delegate_(list_delegate) {
    SetLayoutManager(
        new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 1));

    content_ = new views::View;
    content_->SetLayoutManager(
        new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 1));
    AddChildView(content_);

    content_->SetPaintToLayer(true);
    content_->SetFillsBoundsOpaquely(false);
    content_->layer()->SetMasksToBounds(true);
  }

  void Update(const NotificationList::Notifications& popup_notifications) {
    content_->RemoveAllChildViews(true);
    for (NotificationList::Notifications::const_iterator iter =
             popup_notifications.begin();
         iter != popup_notifications.end(); ++iter) {
      MessageView* view =
          MessageViewFactory::ViewForNotification(*iter, list_delegate_);
      view->SetUpView();
      content_->AddChildView(view);
    }
    content_->SizeToPreferredSize();
    content_->InvalidateLayout();
    Layout();
    if (GetWidget())
      GetWidget()->GetRootView()->SchedulePaint();
  }

  size_t NumMessageViews() const {
    return content_->child_count();
  }

 private:
  NotificationList::Delegate* list_delegate_;
  views::View* content_;

  DISALLOW_COPY_AND_ASSIGN(PopupBubbleContentsView);
};

// MessagePopupBubble
MessagePopupBubble::MessagePopupBubble(NotificationList::Delegate* delegate)
    : MessageBubbleBase(delegate),
      contents_view_(NULL),
      num_popups_(0) {
}

MessagePopupBubble::~MessagePopupBubble() {
}

views::TrayBubbleView::InitParams MessagePopupBubble::GetInitParams(
    views::TrayBubbleView::AnchorAlignment anchor_alignment) {
  views::TrayBubbleView::InitParams init_params =
      GetDefaultInitParams(anchor_alignment);
  init_params.arrow_color = kBackgroundColor;
  init_params.close_on_deactivate = false;
  return init_params;
}

void MessagePopupBubble::InitializeContents(
    views::TrayBubbleView* new_bubble_view) {
  set_bubble_view(new_bubble_view);
  contents_view_ = new PopupBubbleContentsView(list_delegate());
  bubble_view()->AddChildView(contents_view_);
  UpdateBubbleView();
}

void MessagePopupBubble::OnBubbleViewDestroyed() {
  contents_view_ = NULL;
}

void MessagePopupBubble::UpdateBubbleView() {
  NotificationList::Notifications popup_notifications;
  list_delegate()->GetNotificationList()->GetPopupNotifications(
      &popup_notifications);
  if (popup_notifications.size() == 0) {
    if (bubble_view())
      bubble_view()->delegate()->HideBubble(bubble_view());  // deletes |this|
    return;
  }
  // Only reset the timer when the number of visible notifications changes.
  if (num_popups_ != popup_notifications.size()) {
    num_popups_ = popup_notifications.size();
    StartAutoCloseTimer();
  }
  contents_view_->Update(popup_notifications);
  bubble_view()->Show();
  bubble_view()->UpdateBubble();
}

void MessagePopupBubble::OnMouseEnteredView() {
  StopAutoCloseTimer();
}

void MessagePopupBubble::OnMouseExitedView() {
  StartAutoCloseTimer();
}

void MessagePopupBubble::StartAutoCloseTimer() {
  autoclose_.Start(FROM_HERE,
                   base::TimeDelta::FromSeconds(
                       kAutocloseDelaySeconds),
                   this, &MessagePopupBubble::OnAutoClose);
}

void MessagePopupBubble::StopAutoCloseTimer() {
  autoclose_.Stop();
}

void MessagePopupBubble::OnAutoClose() {
  list_delegate()->GetNotificationList()->MarkPopupsAsShown();
  num_popups_ = 0;
  UpdateBubbleView();
}

size_t MessagePopupBubble::NumMessageViewsForTest() const {
  return contents_view_->NumMessageViews();
}

}  // namespace message_center