// Copyright 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 "chrome/browser/ui/extensions/extension_installed_bubble.h"

#include <string>

#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/time/time.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/common/extensions/api/extension_action/action_info.h"
#include "chrome/common/extensions/api/omnibox/omnibox_handler.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_source.h"
#include "extensions/common/extension.h"

using content::Details;
using extensions::Extension;

namespace {

// How long to wait for browser action animations to complete before retrying.
const int kAnimationWaitMs = 50;
// How often we retry when waiting for browser action animation to end.
const int kAnimationWaitRetries = 10;

} // namespace

ExtensionInstalledBubble::ExtensionInstalledBubble(Delegate* delegate,
                                                   const Extension* extension,
                                                   Browser *browser,
                                                   const SkBitmap& icon)
    : delegate_(delegate),
      extension_(extension),
      browser_(browser),
      icon_(icon),
      animation_wait_retries_(0),
      weak_factory_(this) {
  if (!extensions::OmniboxInfo::GetKeyword(extension).empty())
    type_ = OMNIBOX_KEYWORD;
  else if (extensions::ActionInfo::GetBrowserActionInfo(extension))
    type_ = BROWSER_ACTION;
  else if (extensions::ActionInfo::GetPageActionInfo(extension) &&
           extensions::ActionInfo::IsVerboseInstallMessage(extension))
    type_ = PAGE_ACTION;
  else
    type_ = GENERIC;

  // |extension| has been initialized but not loaded at this point. We need
  // to wait on showing the Bubble until not only the EXTENSION_LOADED gets
  // fired, but all of the EXTENSION_LOADED Observers have run. Only then can we
  // be sure that a BrowserAction or PageAction has had views created which we
  // can inspect for the purpose of previewing of pointing to them.
  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
      content::Source<Profile>(browser->profile()));
  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
      content::Source<Profile>(browser->profile()));
  registrar_.Add(this, chrome::NOTIFICATION_BROWSER_CLOSING,
      content::Source<Browser>(browser));
}

ExtensionInstalledBubble::~ExtensionInstalledBubble() {}

void ExtensionInstalledBubble::IgnoreBrowserClosing() {
  registrar_.Remove(this, chrome::NOTIFICATION_BROWSER_CLOSING,
                    content::Source<Browser>(browser_));
}

void ExtensionInstalledBubble::ShowInternal() {
  if (delegate_->MaybeShowNow())
    return;
  if (animation_wait_retries_++ < kAnimationWaitRetries) {
    base::MessageLoopForUI::current()->PostDelayedTask(
        FROM_HERE,
        base::Bind(&ExtensionInstalledBubble::ShowInternal,
                   weak_factory_.GetWeakPtr()),
        base::TimeDelta::FromMilliseconds(kAnimationWaitMs));
  }
}

void ExtensionInstalledBubble::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  switch (type) {
    case chrome::NOTIFICATION_EXTENSION_LOADED: {
      const Extension* extension = Details<const Extension>(details).ptr();
      if (extension == extension_) {
        animation_wait_retries_ = 0;
        // PostTask to ourself to allow all EXTENSION_LOADED Observers to run.
        base::MessageLoopForUI::current()->PostTask(
            FROM_HERE,
            base::Bind(&ExtensionInstalledBubble::ShowInternal,
                       weak_factory_.GetWeakPtr()));
      }
      break;
    }
    case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
      const Extension* extension =
          Details<extensions::UnloadedExtensionInfo>(details)->extension;
      if (extension == extension_) {
        // Extension is going away, make sure ShowInternal won't be called.
        weak_factory_.InvalidateWeakPtrs();
        extension_ = NULL;
      }
      break;
    }
    case chrome::NOTIFICATION_BROWSER_CLOSING:
      delete delegate_;
      break;

    default:
      NOTREACHED() << "Received unexpected notification";
  }
}