// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "browser/net_log.h"

#include "browser/browser_context.h"
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "content/public/common/content_switches.h"
#include "net/log/net_log_util.h"
#include "net/url_request/url_request_context.h"

namespace brightray {

NetLog::NetLog(net::URLRequestContext* context)
    : added_events_(false),
      context_(context) {
  auto command_line = base::CommandLine::ForCurrentProcess();

  if (command_line->HasSwitch(switches::kLogNetLog)) {
    base::FilePath log_path =
        command_line->GetSwitchValuePath(switches::kLogNetLog);

    #if defined(OS_WIN)
      log_file_.reset(_wfopen(log_path.value().c_str(), L"w"));
    #elif defined(OS_POSIX)
      log_file_.reset(fopen(log_path.value().c_str(), "w"));
    #endif

    if (!log_file_)
      LOG(ERROR) << "Could not open file: " << log_path.value()
                 << "for net logging";

    std::string json;
    scoped_ptr<base::Value> constants = net::GetNetConstants();
    base::JSONWriter::Write(constants.release(), &json);
    fprintf(log_file_.get(), "{\"constants\": %s, \n", json.c_str());
    fprintf(log_file_.get(), "\"events\": [\n");

    if (context_.get()) {
      DCHECK(context_->CalledOnValidThread());

      std::set<net::URLRequestContext*> contexts;
      contexts.insert(context_.get());

      net::CreateNetLogEntriesForActiveObjects(contexts, this);
    }

    DeprecatedAddObserver(this, net::NetLog::LogLevel::LOG_STRIP_PRIVATE_DATA);
  }
}

NetLog::~NetLog() {
  DeprecatedRemoveObserver(this);
  fprintf(log_file_.get(), "]}");
  log_file_.reset();
}

void NetLog::OnAddEntry(const net::NetLog::Entry& entry) {
  std::string json;
  base::JSONWriter::Write(entry.ToValue(), &json);

  fprintf(log_file_.get(), "%s%s", (added_events_ ? ",\n" : ""), json.c_str());
  added_events_ = true;
}

}  // namespace brightray