#include "platform/servers_list.hpp"

#include "platform/http_request.hpp"
#include "platform/platform.hpp"

#include "base/logging.hpp"
#include "base/assert.hpp"

#include "3party/jansson/myjansson.hpp"

namespace downloader
{
// Returns false if can't parse urls. Note that it also clears outUrls.
bool ParseServerList(std::string const & jsonStr, std::vector<std::string> & outUrls)
{
  outUrls.clear();
  try
  {
    base::Json root(jsonStr.c_str());
    for (size_t i = 0; i < json_array_size(root.get()); ++i)
    {
      char const * url = json_string_value(json_array_get(root.get(), i));
      if (url)
        outUrls.push_back(url);
    }
  }
  catch (base::Json::Exception const & ex)
  {
    LOG(LERROR, ("Can't parse server list json:", ex.Msg(), jsonStr));
  }
  return !outUrls.empty();
}

void GetServersList(std::string const & src, std::vector<std::string> & urls)
{
  if (!src.empty() && ParseServerList(src, urls))
    return;

  VERIFY(ParseServerList(GetPlatform().DefaultUrlsJSON(), urls), ());
  LOG(LWARNING, ("Can't get servers list from request, using default servers:", urls));
}

void GetServersList(HttpRequest const & request, std::vector<std::string> & urls)
{
  auto const src = request.GetStatus() == DownloadStatus::Completed ? request.GetData() : "";
  GetServersList(src, urls);
}
} // namespace downloader