#pragma once

#include "envoy/filesystem/filesystem.h"

#include "source/server/admin/admin_html_util.h"

#include "source/server/admin/stats_render.h"

namespace Envoy {

namespace Server {

class StatsHtmlRender : public StatsTextRender {

public:

  StatsHtmlRender(Http::ResponseHeaderMap& response_headers, Buffer::Instance& response,

                  const StatsParams& params);

  /**

   * Writes the header and starts the body for a stats page based on the

   * supplied stats parameters.

   *

   * @param url_handler The stats URL handler.

   * @param params The parameters for the stats page.

   * @param response The buffer in which to write the HTML.

   */

  void setupStatsPage(const Admin::UrlHandler& url_handler, const StatsParams& params,

                      Buffer::Instance& response);

  // StatsTextRender

  void noStats(Buffer::Instance&, absl::string_view types) override;

  void generate(Buffer::Instance& response, const std::string& name,

                const std::string& value) override;

  // This matches the superclass impl exactly, but is needed to allow gcc to compile, which

  // warns about hidden overrides if we omit it.

  void generate(Buffer::Instance& response, const std::string& name, uint64_t value) override {

    StatsTextRender::generate(response, name, value);

  }

  void generate(Buffer::Instance&, const std::string& name,

                const Stats::ParentHistogram& histogram) override;

  void finalize(Buffer::Instance&) override;

private:

  const bool active_{false};

  bool json_histograms_{false};

  bool first_histogram_{true};

};

} // namespace Server

} // namespace Envoy