// 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 "android_webview/browser/aw_download_manager_delegate.h"

#include "android_webview/browser/aw_content_browser_client.h"
#include "android_webview/browser/aw_contents_client_bridge.h"
#include "base/files/file_path.h"
#include "base/task/post_task.h"
#include "components/download/public/common/download_danger_type.h"
#include "components/download/public/common/download_item.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_contents.h"

namespace android_webview {

namespace {

void DownloadStartingOnUIThread(content::WebContents* web_contents,
                                const GURL& url,
                                const std::string& user_agent,
                                const std::string& content_disposition,
                                const std::string& mime_type,
                                int64_t content_length) {
  AwContentsClientBridge* client =
      AwContentsClientBridge::FromWebContents(web_contents);
  if (!client)
    return;
  client->NewDownload(url, user_agent, content_disposition, mime_type,
                      content_length);
}

}  // namespace

AwDownloadManagerDelegate::~AwDownloadManagerDelegate() {}

bool AwDownloadManagerDelegate::DetermineDownloadTarget(
    download::DownloadItem* item,
    const content::DownloadTargetCallback& callback) {
  // Note this cancel is independent of the URLRequest cancel in
  // AwResourceDispatcherHostDelegate::DownloadStarting. The request
  // could have already finished by the time DownloadStarting is called.
  callback.Run(base::FilePath() /* Empty file path for cancel */,
               download::DownloadItem::TARGET_DISPOSITION_OVERWRITE,
               download::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS, base::FilePath(),
               download::DOWNLOAD_INTERRUPT_REASON_USER_CANCELED);
  return true;
}

bool AwDownloadManagerDelegate::ShouldCompleteDownload(
    download::DownloadItem* item,
    const base::Closure& complete_callback) {
  NOTREACHED();
  return true;
}

bool AwDownloadManagerDelegate::ShouldOpenDownload(
    download::DownloadItem* item,
    const content::DownloadOpenDelayedCallback& callback) {
  NOTREACHED();
  return true;
}

bool AwDownloadManagerDelegate::InterceptDownloadIfApplicable(
    const GURL& url,
    const std::string& user_agent,
    const std::string& content_disposition,
    const std::string& mime_type,
    const std::string& request_origin,
    int64_t content_length,
    content::WebContents* web_contents) {
  std::string aw_user_agent = web_contents->GetUserAgentOverride();
  if (aw_user_agent.empty()) {
    // use default user agent if nothing is provided
    aw_user_agent = user_agent.empty() ? GetUserAgent() : user_agent;
  }
  base::PostTaskWithTraits(
      FROM_HERE, {content::BrowserThread::UI},
      base::BindOnce(&DownloadStartingOnUIThread, web_contents, url,
                     aw_user_agent, content_disposition, mime_type,
                     content_length));
  return true;
}

void AwDownloadManagerDelegate::GetNextId(
    const content::DownloadIdCallback& callback) {
  static uint32_t next_id = download::DownloadItem::kInvalidId + 1;
  callback.Run(next_id++);
}

}  // namespace android_webview