// Copyright (c) 2011 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/download/download_service.h"

#include "chrome/browser/browser_process.h"
#include "chrome/browser/download/chrome_download_manager_delegate.h"
#include "chrome/browser/profiles/profile.h"
#include "content/browser/download/download_manager.h"

DownloadService::DownloadService(Profile* profile)
    : download_manager_created_(false),
      profile_(profile) {}

DownloadService::~DownloadService() {}

DownloadManager* DownloadService::GetDownloadManager() {
  if (!download_manager_created_) {
    // In case the delegate has already been set by
    // SetDownloadManagerDelegateForTesting.
    if (!manager_delegate_.get())
      manager_delegate_ = new ChromeDownloadManagerDelegate(profile_);
    manager_ = new DownloadManager(
        manager_delegate_.get(), g_browser_process->download_status_updater());
    manager_->Init(profile_);
    manager_delegate_->SetDownloadManager(manager_);
    download_manager_created_ = true;
  }
  return manager_.get();
}

bool DownloadService::HasCreatedDownloadManager() {
  return download_manager_created_;
}

void DownloadService::SetDownloadManagerDelegateForTesting(
    ChromeDownloadManagerDelegate* new_delegate) {
  // Guarantee everything is properly initialized.
  GetDownloadManager();

  manager_->SetDownloadManagerDelegate(new_delegate);
  new_delegate->SetDownloadManager(manager_);
  manager_delegate_ = new_delegate;
}

void DownloadService::Shutdown() {
  if (manager_.get()) {
    manager_->Shutdown();

    // The manager reference can be released any time after shutdown;
    // it will be destroyed when the last reference is released on the
    // FILE thread.
    // Resetting here will guarantee that any attempts to get the
    // DownloadManager after shutdown will return null.
    //
    // TODO(rdsmith): Figure out how to guarantee when the last reference
    // will be released and make DownloadManager not RefCountedThreadSafe<>.
    manager_.release();
  }
  if (manager_delegate_.get())
    manager_delegate_.release();
}