// Copyright 2015 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 "content/browser/android/background_sync_launcher_android.h"

#include "content/public/browser/browser_thread.h"
#include "jni/BackgroundSyncLauncher_jni.h"

namespace content {

namespace {
base::LazyInstance<BackgroundSyncLauncherAndroid> g_background_sync_launcher =
    LAZY_INSTANCE_INITIALIZER;
}

// static
BackgroundSyncLauncherAndroid* BackgroundSyncLauncherAndroid::Get() {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  return g_background_sync_launcher.Pointer();
}

// static
void BackgroundSyncLauncherAndroid::LaunchBrowserWhenNextOnline(
    const BackgroundSyncManager* registrant,
    bool launch_when_next_online) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  Get()->LaunchBrowserWhenNextOnlineImpl(registrant, launch_when_next_online);
}

void BackgroundSyncLauncherAndroid::LaunchBrowserWhenNextOnlineImpl(
    const BackgroundSyncManager* registrant,
    bool launch_when_next_online) {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  bool was_launching = !launch_when_next_online_registrants_.empty();

  if (launch_when_next_online)
    launch_when_next_online_registrants_.insert(registrant);
  else
    launch_when_next_online_registrants_.erase(registrant);

  bool now_launching = !launch_when_next_online_registrants_.empty();
  if (was_launching != now_launching) {
    JNIEnv* env = base::android::AttachCurrentThread();
    Java_BackgroundSyncLauncher_setLaunchWhenNextOnline(
        env, java_launcher_.obj(), now_launching);
  }
}

// static
bool BackgroundSyncLauncherAndroid::RegisterLauncher(JNIEnv* env) {
  return RegisterNativesImpl(env);
}

BackgroundSyncLauncherAndroid::BackgroundSyncLauncherAndroid() {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  JNIEnv* env = base::android::AttachCurrentThread();
  java_launcher_.Reset(Java_BackgroundSyncLauncher_create(
      env, base::android::GetApplicationContext()));
}

BackgroundSyncLauncherAndroid::~BackgroundSyncLauncherAndroid() {
  DCHECK_CURRENTLY_ON(BrowserThread::UI);

  JNIEnv* env = base::android::AttachCurrentThread();
  Java_BackgroundSyncLauncher_destroy(env, java_launcher_.obj());
}

}  // namespace content