// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "atom/browser/atom_browser_context.h"

#include "atom/browser/atom_browser_main_parts.h"
#include "atom/browser/net/atom_url_request_job_factory.h"
#include "atom/browser/net/asar/asar_protocol_handler.h"
#include "atom/browser/web_view/web_view_manager.h"
#include "atom/common/options_switches.h"
#include "base/command_line.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/threading/worker_pool.h"
#include "chrome/browser/browser_process.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/url_constants.h"
#include "net/url_request/data_protocol_handler.h"
#include "net/url_request/file_protocol_handler.h"
#include "net/url_request/url_request_intercepting_job_factory.h"
#include "url/url_constants.h"

using content::BrowserThread;

namespace atom {

namespace {

const char* kAsarScheme = "asar";

class NoCacheBackend : public net::HttpCache::BackendFactory {
  int CreateBackend(net::NetLog* net_log,
                    scoped_ptr<disk_cache::Backend>* backend,
                    const net::CompletionCallback& callback) override {
    return net::ERR_FAILED;
  }
};

}  // namespace

AtomBrowserContext::AtomBrowserContext()
    : fake_browser_process_(new BrowserProcess),
      job_factory_(new AtomURLRequestJobFactory) {
}

AtomBrowserContext::~AtomBrowserContext() {
}

net::URLRequestJobFactory* AtomBrowserContext::CreateURLRequestJobFactory(
    content::ProtocolHandlerMap* handlers,
    content::URLRequestInterceptorScopedVector* interceptors) {
  scoped_ptr<AtomURLRequestJobFactory> job_factory(job_factory_);

  for (content::ProtocolHandlerMap::iterator it = handlers->begin();
       it != handlers->end(); ++it)
    job_factory->SetProtocolHandler(it->first, it->second.release());
  handlers->clear();

  job_factory->SetProtocolHandler(
      url::kDataScheme, new net::DataProtocolHandler);
  job_factory->SetProtocolHandler(
      url::kFileScheme, new net::FileProtocolHandler(
          BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
              base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)));
  job_factory->SetProtocolHandler(
      kAsarScheme, new asar::AsarProtocolHandler(
          BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
              base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)));

  // Set up interceptors in the reverse order.
  scoped_ptr<net::URLRequestJobFactory> top_job_factory =
      job_factory.PassAs<net::URLRequestJobFactory>();
  content::URLRequestInterceptorScopedVector::reverse_iterator it;
  for (it = interceptors->rbegin(); it != interceptors->rend(); ++it)
    top_job_factory.reset(new net::URLRequestInterceptingJobFactory(
        top_job_factory.Pass(), make_scoped_ptr(*it)));
  interceptors->weak_clear();

  return top_job_factory.release();
}

net::HttpCache::BackendFactory*
AtomBrowserContext::CreateHttpCacheBackendFactory(
    const base::FilePath& base_path) {
  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  if (command_line->HasSwitch(switches::kDisableHttpCache))
    return new NoCacheBackend;
  else
    return brightray::BrowserContext::CreateHttpCacheBackendFactory(base_path);
}

content::BrowserPluginGuestManager* AtomBrowserContext::GetGuestManager() {
  if (!guest_manager_)
    guest_manager_.reset(new WebViewManager(this));
  return guest_manager_.get();
}

// static
AtomBrowserContext* AtomBrowserContext::Get() {
  return static_cast<AtomBrowserContext*>(
      AtomBrowserMainParts::Get()->browser_context());
}

}  // namespace atom