#pragma once

#include "envoy/config/config_validator.h"

#include "envoy/extensions/config/validators/minimum_clusters/v3/minimum_clusters.pb.h"

namespace Envoy {

namespace Extensions {

namespace Config {

namespace Validators {

/**

 * A config validator extension that validates that the number of clusters do

 * not decrease below some threshold.

 */

class MinimumClustersValidator : public Envoy::Config::ConfigValidator {

public:

  MinimumClustersValidator(

      const envoy::extensions::config::validators::minimum_clusters::v3::MinimumClustersValidator&

          config)

  // ConfigValidator

  void validate(const Server::Instance& server,

                const std::vector<Envoy::Config::DecodedResourcePtr>& resources) override;

  void validate(const Server::Instance& server,

                const std::vector<Envoy::Config::DecodedResourcePtr>& added_resources,

                const Protobuf::RepeatedPtrField<std::string>& removed_resources) override;

private:

  const uint64_t min_clusters_num_;

};

} // namespace Validators

} // namespace Config

} // namespace Extensions

} // namespace Envoy