// Copyright 2014 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 "chromecast/browser/cast_content_browser_client.h"

#include <stddef.h>
#include <string>
#include <utility>

#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/files/scoped_file.h"
#include "base/i18n/rtl.h"
#include "base/macros.h"
#include "base/path_service.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "chromecast/base/cast_constants.h"
#include "chromecast/base/cast_paths.h"
#include "chromecast/base/chromecast_switches.h"
#include "chromecast/browser/cast_browser_context.h"
#include "chromecast/browser/cast_browser_main_parts.h"
#include "chromecast/browser/cast_browser_process.h"
#include "chromecast/browser/cast_network_delegate.h"
#include "chromecast/browser/cast_quota_permission_context.h"
#include "chromecast/browser/cast_resource_dispatcher_host_delegate.h"
#include "chromecast/browser/geolocation/cast_access_token_store.h"
#include "chromecast/browser/media/cma_media_pipeline_client.h"
#include "chromecast/browser/media/cma_message_filter_host.h"
#include "chromecast/browser/service/cast_service_simple.h"
#include "chromecast/browser/url_request_context_factory.h"
#include "chromecast/common/global_descriptors.h"
#include "chromecast/public/media/media_pipeline_backend.h"
#include "components/crash/content/app/breakpad_linux.h"
#include "components/crash/content/browser/crash_handler_host_linux.h"
#include "components/network_hints/browser/network_hints_message_filter.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/certificate_request_result_type.h"
#include "content/public/browser/client_certificate_delegate.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/resource_dispatcher_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/content_descriptors.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/url_constants.h"
#include "content/public/common/web_preferences.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "net/url_request/url_request_context_getter.h"
#include "ui/gl/gl_switches.h"

#if defined(ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
#include "chromecast/browser/media/cast_mojo_media_client.h"
// nogncheck because of conditional dependency.
#include "media/mojo/services/mojo_media_application.h"  // nogncheck
#endif  // ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS

#if defined(OS_ANDROID)
#include "components/crash/content/browser/crash_dump_manager_android.h"
#include "components/external_video_surface/browser/android/external_video_surface_container_impl.h"
#else
#include "chromecast/browser/media/cast_browser_cdm_factory.h"
#endif  // defined(OS_ANDROID)

namespace chromecast {
namespace shell {

namespace {
#if defined(ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
static scoped_ptr<mojo::ShellClient> CreateCastMojoMediaApplication(
    CastContentBrowserClient* browser_client) {
  scoped_ptr<::media::MojoMediaClient> mojo_media_client(
      new media::CastMojoMediaClient(
          browser_client->GetCmaMediaPipelineClient()));
  return scoped_ptr<mojo::ShellClient>(
      new ::media::MojoMediaApplication(std::move(mojo_media_client)));
}
#endif  // ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS
}  // namespace

CastContentBrowserClient::CastContentBrowserClient()
    : cast_browser_main_parts_(nullptr),
      url_request_context_factory_(new URLRequestContextFactory()) {}

CastContentBrowserClient::~CastContentBrowserClient() {
  content::BrowserThread::DeleteSoon(
      content::BrowserThread::IO,
      FROM_HERE,
      url_request_context_factory_.release());
}

void CastContentBrowserClient::AppendExtraCommandLineSwitches(
    base::CommandLine* command_line) {
}

void CastContentBrowserClient::PreCreateThreads() {
}

scoped_ptr<CastService> CastContentBrowserClient::CreateCastService(
    content::BrowserContext* browser_context,
    PrefService* pref_service,
    net::URLRequestContextGetter* request_context_getter,
    media::VideoPlaneController* video_plane_controller) {
  return make_scoped_ptr(new CastServiceSimple(browser_context, pref_service));
}

#if !defined(OS_ANDROID)
scoped_refptr<media::CmaMediaPipelineClient>
CastContentBrowserClient::GetCmaMediaPipelineClient() {
  if (!cma_media_pipeline_client_.get())
    cma_media_pipeline_client_ = CreateCmaMediaPipelineClient();
  return cma_media_pipeline_client_;
}
#endif  // OS_ANDROID

void CastContentBrowserClient::SetMetricsClientId(
    const std::string& client_id) {
}

void CastContentBrowserClient::RegisterMetricsProviders(
    ::metrics::MetricsService* metrics_service) {
}

bool CastContentBrowserClient::EnableRemoteDebuggingImmediately() {
  return true;
}

content::BrowserMainParts* CastContentBrowserClient::CreateBrowserMainParts(
    const content::MainFunctionParams& parameters) {
  DCHECK(!cast_browser_main_parts_);
  cast_browser_main_parts_ =
      new CastBrowserMainParts(parameters, url_request_context_factory_.get());
  CastBrowserProcess::GetInstance()->SetCastContentBrowserClient(this);
  return cast_browser_main_parts_;
}

void CastContentBrowserClient::RenderProcessWillLaunch(
    content::RenderProcessHost* host) {
#if !defined(OS_ANDROID)
  scoped_refptr<media::CmaMessageFilterHost> cma_message_filter(
      new media::CmaMessageFilterHost(
          host->GetID(), GetCmaMediaPipelineClient(), GetMediaTaskRunner()));
  host->AddFilter(cma_message_filter.get());
#endif  // !defined(OS_ANDROID)

  // Forcibly trigger I/O-thread URLRequestContext initialization before
  // getting HostResolver.
  content::BrowserThread::PostTaskAndReplyWithResult(
      content::BrowserThread::IO, FROM_HERE,
      base::Bind(&net::URLRequestContextGetter::GetURLRequestContext,
                 base::Unretained(
                    url_request_context_factory_->GetSystemGetter())),
      base::Bind(&CastContentBrowserClient::AddNetworkHintsMessageFilter,
                 base::Unretained(this), host->GetID()));
}

scoped_refptr<base::SingleThreadTaskRunner>
CastContentBrowserClient::GetMediaTaskRunner() {
  DCHECK(cast_browser_main_parts_);
  return cast_browser_main_parts_->GetMediaTaskRunner();
}

#if !defined(OS_ANDROID)
scoped_refptr<media::CmaMediaPipelineClient>
CastContentBrowserClient::CreateCmaMediaPipelineClient() {
  return make_scoped_refptr(new media::CmaMediaPipelineClient());
}
#endif  // OS_ANDROID

void CastContentBrowserClient::AddNetworkHintsMessageFilter(
    int render_process_id, net::URLRequestContext* context) {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);

  content::RenderProcessHost* host =
      content::RenderProcessHost::FromID(render_process_id);
  if (!host)
    return;

  scoped_refptr<content::BrowserMessageFilter> network_hints_message_filter(
      new network_hints::NetworkHintsMessageFilter(
          url_request_context_factory_->host_resolver()));
  host->AddFilter(network_hints_message_filter.get());
}

net::URLRequestContextGetter* CastContentBrowserClient::CreateRequestContext(
    content::BrowserContext* browser_context,
    content::ProtocolHandlerMap* protocol_handlers,
    content::URLRequestInterceptorScopedVector request_interceptors) {
  return url_request_context_factory_->CreateMainGetter(
      browser_context, protocol_handlers, std::move(request_interceptors));
}

bool CastContentBrowserClient::IsHandledURL(const GURL& url) {
  if (!url.is_valid())
    return false;

  static const char* const kProtocolList[] = {
    content::kChromeUIScheme,
    content::kChromeDevToolsScheme,
    kChromeResourceScheme,
    url::kBlobScheme,
    url::kDataScheme,
    url::kFileSystemScheme,
  };

  const std::string& scheme = url.scheme();
  for (size_t i = 0; i < arraysize(kProtocolList); ++i) {
    if (scheme == kProtocolList[i])
      return true;
  }

  if (scheme == url::kFileScheme) {
    return base::CommandLine::ForCurrentProcess()->HasSwitch(
        switches::kEnableLocalFileAccesses);
  }

  return false;
}

void CastContentBrowserClient::AppendExtraCommandLineSwitches(
    base::CommandLine* command_line,
    int child_process_id) {
  std::string process_type =
      command_line->GetSwitchValueNative(switches::kProcessType);
  base::CommandLine* browser_command_line =
      base::CommandLine::ForCurrentProcess();

  // IsCrashReporterEnabled() is set when InitCrashReporter() is called, and
  // controlled by GetBreakpadClient()->EnableBreakpadForProcess(), therefore
  // it's ok to add switch to every process here.
  if (breakpad::IsCrashReporterEnabled()) {
    command_line->AppendSwitch(switches::kEnableCrashReporter);
  }

  // Renderer process command-line
  if (process_type == switches::kRendererProcess) {
    // Any browser command-line switches that should be propagated to
    // the renderer go here.

    if (browser_command_line->HasSwitch(switches::kEnableCmaMediaPipeline))
      command_line->AppendSwitch(switches::kEnableCmaMediaPipeline);
    if (browser_command_line->HasSwitch(switches::kAllowHiddenMediaPlayback))
      command_line->AppendSwitch(switches::kAllowHiddenMediaPlayback);
  }

#if defined(OS_LINUX)
  // Necessary for accelerated 2d canvas.  By default on Linux, Chromium assumes
  // GLES2 contexts can be lost to a power-save mode, which breaks GPU canvas
  // apps.
  if (process_type == switches::kGpuProcess) {
    command_line->AppendSwitch(switches::kGpuNoContextLost);
  }
#endif

  AppendExtraCommandLineSwitches(command_line);
}

content::AccessTokenStore* CastContentBrowserClient::CreateAccessTokenStore() {
  return new CastAccessTokenStore(
      CastBrowserProcess::GetInstance()->browser_context());
}

void CastContentBrowserClient::OverrideWebkitPrefs(
    content::RenderViewHost* render_view_host,
    content::WebPreferences* prefs) {
  prefs->allow_scripts_to_close_windows = true;
  // TODO(lcwu): http://crbug.com/391089. This pref is set to true by default
  // because some content providers such as YouTube use plain http requests
  // to retrieve media data chunks while running in a https page. This pref
  // should be disabled once all the content providers are no longer doing that.
  prefs->allow_running_insecure_content = true;

  // Enable 5% margins for WebVTT cues to keep within title-safe area
  prefs->text_track_margin_percentage = 5;
}

void CastContentBrowserClient::ResourceDispatcherHostCreated() {
  CastBrowserProcess::GetInstance()->SetResourceDispatcherHostDelegate(
      make_scoped_ptr(new CastResourceDispatcherHostDelegate));
  content::ResourceDispatcherHost::Get()->SetDelegate(
      CastBrowserProcess::GetInstance()->resource_dispatcher_host_delegate());
}

std::string CastContentBrowserClient::GetApplicationLocale() {
  const std::string locale(base::i18n::GetConfiguredLocale());
  return locale.empty() ? "en-US" : locale;
}

content::QuotaPermissionContext*
CastContentBrowserClient::CreateQuotaPermissionContext() {
  return new CastQuotaPermissionContext();
}

void CastContentBrowserClient::AllowCertificateError(
    content::WebContents* web_contents,
    int cert_error,
    const net::SSLInfo& ssl_info,
    const GURL& request_url,
    content::ResourceType resource_type,
    bool overridable,
    bool strict_enforcement,
    bool expired_previous_decision,
    const base::Callback<void(bool)>& callback,
    content::CertificateRequestResultType* result) {
  // Allow developers to override certificate errors.
  // Otherwise, any fatal certificate errors will cause an abort.
  *result = content::CERTIFICATE_REQUEST_RESULT_TYPE_CANCEL;
  return;
}

void CastContentBrowserClient::SelectClientCertificate(
    content::WebContents* web_contents,
    net::SSLCertRequestInfo* cert_request_info,
    scoped_ptr<content::ClientCertificateDelegate> delegate) {
  GURL requesting_url("https://" + cert_request_info->host_and_port.ToString());

  if (!requesting_url.is_valid()) {
    LOG(ERROR) << "Invalid URL string: "
               << requesting_url.possibly_invalid_spec();
    delegate->ContinueWithCertificate(nullptr);
    return;
  }

  // In our case there are no relevant certs in the cert_request_info. The cert
  // we need to return (if permitted) is the Cast device cert, which we can
  // access directly through the ClientAuthSigner instance. However, we need to
  // be on the IO thread to determine whether the app is whitelisted to return
  // it, because CastNetworkDelegate is bound to the IO thread.
  // Subsequently, the callback must then itself be performed back here
  // on the UI thread.
  //
  // TODO(davidben): Stop using child ID to identify an app.
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  content::BrowserThread::PostTaskAndReplyWithResult(
      content::BrowserThread::IO, FROM_HERE,
      base::Bind(&CastContentBrowserClient::SelectClientCertificateOnIOThread,
                 base::Unretained(this), requesting_url,
                 web_contents->GetRenderProcessHost()->GetID()),
      base::Bind(&content::ClientCertificateDelegate::ContinueWithCertificate,
                 base::Owned(delegate.release())));
}

net::X509Certificate*
CastContentBrowserClient::SelectClientCertificateOnIOThread(
    GURL requesting_url,
    int render_process_id) {
  DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
  CastNetworkDelegate* network_delegate =
      url_request_context_factory_->app_network_delegate();
  if (network_delegate->IsWhitelisted(requesting_url,
                                      render_process_id, false)) {
    return CastNetworkDelegate::DeviceCert();
  } else {
    LOG(ERROR) << "Invalid host for client certificate request: "
               << requesting_url.host()
               << " with render_process_id: "
               << render_process_id;
    return NULL;
  }
}

bool CastContentBrowserClient::CanCreateWindow(
    const GURL& opener_url,
    const GURL& opener_top_level_frame_url,
    const GURL& source_origin,
    WindowContainerType container_type,
    const GURL& target_url,
    const content::Referrer& referrer,
    WindowOpenDisposition disposition,
    const blink::WebWindowFeatures& features,
    bool user_gesture,
    bool opener_suppressed,
    content::ResourceContext* context,
    int render_process_id,
    int opener_render_view_id,
    int opener_render_frame_id,
    bool* no_javascript_access) {
  *no_javascript_access = true;
  return false;
}

void CastContentBrowserClient::RegisterInProcessMojoApplications(
    StaticMojoApplicationMap* apps) {
#if defined(ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
  apps->insert(std::make_pair(
      "mojo:media",
      base::Bind(&CreateCastMojoMediaApplication, base::Unretained(this))));
#endif
}

#if defined(OS_ANDROID)

void CastContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
    const base::CommandLine& command_line,
    int child_process_id,
    content::FileDescriptorInfo* mappings,
    std::map<int, base::MemoryMappedFile::Region>* regions) {
  mappings->Share(
      kAndroidPakDescriptor,
      base::GlobalDescriptors::GetInstance()->Get(kAndroidPakDescriptor));
  regions->insert(std::make_pair(
      kAndroidPakDescriptor, base::GlobalDescriptors::GetInstance()->GetRegion(
                                 kAndroidPakDescriptor)));

  if (breakpad::IsCrashReporterEnabled()) {
    base::File minidump_file(
        breakpad::CrashDumpManager::GetInstance()->CreateMinidumpFile(
            child_process_id));
    if (!minidump_file.IsValid()) {
      LOG(ERROR) << "Failed to create file for minidump, crash reporting will "
                 << "be disabled for this process.";
    } else {
      mappings->Transfer(kAndroidMinidumpDescriptor,
                         base::ScopedFD(minidump_file.TakePlatformFile()));
    }
  }
}

#else

scoped_ptr<::media::CdmFactory> CastContentBrowserClient::CreateCdmFactory() {
  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
          switches::kEnableCmaMediaPipeline)) {
    return make_scoped_ptr(
        new media::CastBrowserCdmFactory(GetMediaTaskRunner()));
  }

  return nullptr;
}

void CastContentBrowserClient::GetAdditionalMappedFilesForChildProcess(
    const base::CommandLine& command_line,
    int child_process_id,
    content::FileDescriptorInfo* mappings) {
  int crash_signal_fd = GetCrashSignalFD(command_line);
  if (crash_signal_fd >= 0) {
    mappings->Share(kCrashDumpSignal, crash_signal_fd);
  }
}

#endif  // defined(OS_ANDROID)

void CastContentBrowserClient::GetAdditionalWebUISchemes(
    std::vector<std::string>* additional_schemes) {
  additional_schemes->push_back(kChromeResourceScheme);
}

#if defined(OS_ANDROID) && defined(VIDEO_HOLE)
content::ExternalVideoSurfaceContainer*
CastContentBrowserClient::OverrideCreateExternalVideoSurfaceContainer(
    content::WebContents* web_contents) {
  return external_video_surface::ExternalVideoSurfaceContainerImpl::Create(
      web_contents);
}
#endif  // defined(OS_ANDROID) && defined(VIDEO_HOLE)

#if !defined(OS_ANDROID)
int CastContentBrowserClient::GetCrashSignalFD(
    const base::CommandLine& command_line) {
  std::string process_type =
      command_line.GetSwitchValueASCII(switches::kProcessType);

  if (process_type == switches::kRendererProcess ||
      process_type == switches::kGpuProcess ||
      process_type == switches::kUtilityProcess) {
    breakpad::CrashHandlerHostLinux* crash_handler =
        crash_handlers_[process_type];
    if (!crash_handler) {
      crash_handler = CreateCrashHandlerHost(process_type);
      crash_handlers_[process_type] = crash_handler;
    }
    return crash_handler->GetDeathSignalSocket();
  }

  return -1;
}

breakpad::CrashHandlerHostLinux*
CastContentBrowserClient::CreateCrashHandlerHost(
    const std::string& process_type) {
  // Let cast shell dump to /tmp. Internal minidump generator code can move it
  // to /data/minidumps later, since /data/minidumps is file lock-controlled.
  base::FilePath dumps_path;
  PathService::Get(base::DIR_TEMP, &dumps_path);

  // Alway set "upload" to false to use our own uploader.
  breakpad::CrashHandlerHostLinux* crash_handler =
    new breakpad::CrashHandlerHostLinux(
        process_type, dumps_path, false /* upload */);
  // StartUploaderThread() even though upload is diferred.
  // Breakpad-related memory is freed in the uploader thread.
  crash_handler->StartUploaderThread();
  return crash_handler;
}
#endif  // !defined(OS_ANDROID)

}  // namespace shell
}  // namespace chromecast