#pragma once

#include "envoy/admin/v3/clusters.pb.h"

#include "envoy/buffer/buffer.h"

#include "envoy/http/codes.h"

#include "envoy/http/header_map.h"

#include "envoy/server/admin.h"

#include "envoy/server/instance.h"

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

#include "absl/strings/string_view.h"

#include "re2/re2.h"

namespace Envoy {

namespace Server {

/**

 * A utility to set admin health status from a specified host and health flag.

 *

 * @param healthFlag    The specific health status to be checked.

 * @param host          The target host.

 * @param health_status A proto reference representing the admin health status.

 */

void setHealthFlag(Upstream::Host::HealthFlag flag, const Upstream::Host& host,

                   envoy::admin::v3::HostHealthStatus& health_status);

class ClustersHandler : public HandlerContextBase {

public:

  ClustersHandler(Server::Instance& server);

  Http::Code handlerClusters(Http::ResponseHeaderMap& response_headers, Buffer::Instance& response,

                             AdminStream&);

private:

  void addOutlierInfo(const std::string& cluster_name,

                      const Upstream::Outlier::Detector* outlier_detector,

                      Buffer::Instance& response);

  bool shouldIncludeCluster(const std::string& cluster_name,

                            const absl::optional<const re2::RE2>& filter);

  void writeClustersAsJson(const absl::optional<const re2::RE2>& filter,

                           Buffer::Instance& response);

  void writeClustersAsText(const absl::optional<const re2::RE2>& filter,

                           Buffer::Instance& response);

};

} // namespace Server

} // namespace Envoy