// 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-CHROMIUM file.

#include "url_request_context_getter.h"

#include "network_delegate.h"
#include "base/string_util.h"
#include "base/threading/worker_pool.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/url_constants.h"
#include "net/base/cert_verifier.h"
#include "net/base/default_server_bound_cert_store.h"
#include "net/base/server_bound_cert_service.h"
#include "net/base/ssl_config_service_defaults.h"
#include "net/cookies/cookie_monster.h"
#include "net/http/http_auth_handler_factory.h"
#include "net/http/http_cache.h"
#include "net/http/http_server_properties_impl.h"
#include "net/proxy/proxy_service.h"
#include "net/url_request/static_http_user_agent_settings.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_storage.h"
#include "net/url_request/url_request_job_factory_impl.h"

namespace brightray {

URLRequestContextGetter::URLRequestContextGetter(
    const base::FilePath& base_path,
    MessageLoop* io_loop,
    MessageLoop* file_loop,
    content::ProtocolHandlerMap* protocol_handlers)
    : base_path_(base_path),
      io_loop_(io_loop),
      file_loop_(file_loop) {
  // Must first be created on the UI thread.
  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));

  std::swap(protocol_handlers_, *protocol_handlers);

  proxy_config_service_.reset(net::ProxyService::CreateSystemProxyConfigService(io_loop_->message_loop_proxy(), file_loop_));
}

URLRequestContextGetter::~URLRequestContextGetter() {
}

net::HostResolver* URLRequestContextGetter::host_resolver() {
  return url_request_context_->host_resolver();
}

net::URLRequestContext* URLRequestContextGetter::GetURLRequestContext()
{
  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));

  if (!url_request_context_.get()) {
    url_request_context_.reset(new net::URLRequestContext());
    network_delegate_.reset(new NetworkDelegate);
    url_request_context_->set_network_delegate(network_delegate_.get());
    storage_.reset(
        new net::URLRequestContextStorage(url_request_context_.get()));
    storage_->set_cookie_store(new net::CookieMonster(NULL, NULL));
    storage_->set_server_bound_cert_service(new net::ServerBoundCertService(
        new net::DefaultServerBoundCertStore(NULL),
        base::WorkerPool::GetTaskRunner(true)));
    storage_->set_http_user_agent_settings(
        new net::StaticHttpUserAgentSettings(
            "en-us,en", "iso-8859-1,*,utf-8", EmptyString()));

    scoped_ptr<net::HostResolver> host_resolver(
        net::HostResolver::CreateDefaultResolver(NULL));

    storage_->set_cert_verifier(net::CertVerifier::CreateDefault());
    // TODO(jam): use v8 if possible, look at chrome code.
    storage_->set_proxy_service(
        net::ProxyService::CreateUsingSystemProxyResolver(
        proxy_config_service_.release(),
        0,
        NULL));
    storage_->set_ssl_config_service(new net::SSLConfigServiceDefaults);
    storage_->set_http_auth_handler_factory(
        net::HttpAuthHandlerFactory::CreateDefault(host_resolver.get()));
    storage_->set_http_server_properties(new net::HttpServerPropertiesImpl);

    base::FilePath cache_path = base_path_.Append(FILE_PATH_LITERAL("Cache"));
    net::HttpCache::DefaultBackend* main_backend =
        new net::HttpCache::DefaultBackend(
            net::DISK_CACHE,
            cache_path,
            0,
            content::BrowserThread::GetMessageLoopProxyForThread(
                content::BrowserThread::CACHE));

    net::HttpNetworkSession::Params network_session_params;
    network_session_params.cert_verifier =
        url_request_context_->cert_verifier();
    network_session_params.server_bound_cert_service =
        url_request_context_->server_bound_cert_service();
    network_session_params.proxy_service =
        url_request_context_->proxy_service();
    network_session_params.ssl_config_service =
        url_request_context_->ssl_config_service();
    network_session_params.http_auth_handler_factory =
        url_request_context_->http_auth_handler_factory();
    network_session_params.network_delegate =
        url_request_context_->network_delegate();
    network_session_params.http_server_properties =
        url_request_context_->http_server_properties();
    network_session_params.ignore_certificate_errors = false;

    // Give |storage_| ownership at the end in case it's |mapped_host_resolver|.
    storage_->set_host_resolver(host_resolver.Pass());
    network_session_params.host_resolver =
        url_request_context_->host_resolver();

    net::HttpCache* main_cache = new net::HttpCache(
        network_session_params, main_backend);
    storage_->set_http_transaction_factory(main_cache);

    scoped_ptr<net::URLRequestJobFactoryImpl> job_factory(
        new net::URLRequestJobFactoryImpl());
    for (auto& it : protocol_handlers_) {
      bool set_protocol = job_factory->SetProtocolHandler(it.first, it.second.release());
      DCHECK(set_protocol);
    }
    protocol_handlers_.clear();
    storage_->set_job_factory(job_factory.release());
  }

  return url_request_context_.get();
}

scoped_refptr<base::SingleThreadTaskRunner> URLRequestContextGetter::GetNetworkTaskRunner() const
{
  return content::BrowserThread::GetMessageLoopProxyForThread(content::BrowserThread::IO);
}

}