#pragma once

#include <string>

#include "envoy/common/optref.h"

#include "envoy/config/metrics/v3/stats.pb.h"

#include "envoy/stats/stats_matcher.h"

#include "source/common/common/matchers.h"

#include "source/common/protobuf/protobuf.h"

#include "source/common/stats/symbol_table.h"

#include "absl/strings/string_view.h"

namespace Envoy {

namespace Stats {

/**

 * Supplies a stats matcher.

 */

class StatsMatcherImpl : public StatsMatcher {

public:

  StatsMatcherImpl(const envoy::config::metrics::v3::StatsConfig& config, SymbolTable& symbol_table,

                   Server::Configuration::CommonFactoryContext& context);

  // Default constructor simply allows everything.

  // StatsMatcher

  FastResult fastRejects(StatName name) const override;

  bool slowRejects(FastResult, StatName name) const override;

private:

  void optimizeLastMatcher();

  bool fastRejectMatch(StatName name) const;

  bool slowRejectMatch(StatName name) const;

  // Bool indicating whether or not the StatsMatcher is including or excluding stats by default. See

  // StatsMatcherImpl::rejects() for much more detail.

  bool is_inclusive_{true};

  OptRef<SymbolTable> symbol_table_;

  std::unique_ptr<StatNamePool> stat_name_pool_;

  std::vector<Matchers::StringMatcherImpl> matchers_;

  std::vector<StatName> prefixes_;

};

} // namespace Stats

} // namespace Envoy