#include "source/extensions/tracers/zipkin/util.h"

#include <chrono>

#include <random>

#include <regex>

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

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

#include "absl/strings/str_cat.h"

#include "absl/strings/str_join.h"

namespace Envoy {

namespace Extensions {

namespace Tracers {

namespace Zipkin {

uint64_t Util::generateRandom64(TimeSource& time_source) {

  uint64_t seed = std::chrono::duration_cast<std::chrono::nanoseconds>(

                      time_source.systemTime().time_since_epoch())

                      .count();

  std::mt19937_64 rand_64(seed);

  return rand_64();

}

ProtobufWkt::Value Util::uint64Value(uint64_t value, absl::string_view name,

                                     Replacements& replacements) {

  const std::string string_value = std::to_string(value);

  replacements.push_back({absl::StrCat("\"", name, "\":\"", string_value, "\""),

                          absl::StrCat("\"", name, "\":", string_value)});

  return ValueUtil::stringValue(string_value);

}

} // namespace Zipkin

} // namespace Tracers

} // namespace Extensions

} // namespace Envoy