#ifndef GOOGLE_PROTOBUF_RUST_CPP_KERNEL_MAP_H__
#define GOOGLE_PROTOBUF_RUST_CPP_KERNEL_MAP_H__

// Defines concrete thunks to access typed map methods from Rust.
#define __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(                                   \
    key_ty, rust_key_ty, ffi_key_ty, to_cpp_key, to_ffi_key, value_ty,         \
    rust_value_ty, ffi_value_ty, to_cpp_value, to_ffi_value)                   \
  google::protobuf::Map<key_ty, value_ty>*                                               \
      __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_new() {        \
    return new google::protobuf::Map<key_ty, value_ty>();                                \
  }                                                                            \
  void __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_free(         \
      google::protobuf::Map<key_ty, value_ty>* m) {                                      \
    delete m;                                                                  \
  }                                                                            \
  void __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_clear(        \
      google::protobuf::Map<key_ty, value_ty>* m) {                                      \
    m->clear();                                                                \
  }                                                                            \
  size_t __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_size(       \
      const google::protobuf::Map<key_ty, value_ty>* m) {                                \
    return m->size();                                                          \
  }                                                                            \
  bool __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_insert(       \
      google::protobuf::Map<key_ty, value_ty>* m, ffi_key_ty key, ffi_value_ty value) {  \
    auto iter_and_inserted = m->try_emplace(to_cpp_key, to_cpp_value);         \
    if (!iter_and_inserted.second) {                                           \
      iter_and_inserted.first->second = to_cpp_value;                          \
    }                                                                          \
    return iter_and_inserted.second;                                           \
  }                                                                            \
  bool __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_get(          \
      const google::protobuf::Map<key_ty, value_ty>* m, ffi_key_ty key,                  \
      ffi_value_ty* value) {                                                   \
    auto cpp_key = to_cpp_key;                                                 \
    auto it = m->find(cpp_key);                                                \
    if (it == m->end()) {                                                      \
      return false;                                                            \
    }                                                                          \
    auto& cpp_value = it->second;                                              \
    *value = to_ffi_value;                                                     \
    return true;                                                               \
  }                                                                            \
  google::protobuf::internal::UntypedMapIterator                                         \
      __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_iter(          \
          const google::protobuf::Map<key_ty, value_ty>* m) {                            \
    return google::protobuf::internal::UntypedMapIterator::FromTyped(m->cbegin());       \
  }                                                                            \
  void __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_iter_get(     \
      const google::protobuf::internal::UntypedMapIterator* iter, ffi_key_ty* key,       \
      ffi_value_ty* value) {                                                   \
    auto typed_iter =                                                          \
        iter->ToTyped<google::protobuf::Map<key_ty, value_ty>::const_iterator>();        \
    const auto& cpp_key = typed_iter->first;                                   \
    const auto& cpp_value = typed_iter->second;                                \
    *key = to_ffi_key;                                                         \
    *value = to_ffi_value;                                                     \
  }                                                                            \
  bool __rust_proto_thunk__Map_##rust_key_ty##_##rust_value_ty##_remove(       \
      google::protobuf::Map<key_ty, value_ty>* m, ffi_key_ty key, ffi_value_ty* value) { \
    auto cpp_key = to_cpp_key;                                                 \
    auto num_removed = m->erase(cpp_key);                                      \
    return num_removed > 0;                                                    \
  }

// Defines the map thunks for all supported key types for a given value type.
#define __PB_RUST_EXPOSE_SCALAR_MAP_METHODS_FOR_VALUE_TYPE(                  \
    value_ty, rust_value_ty, ffi_value_ty, to_cpp_value, to_ffi_value)       \
  __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(int32_t, i32, int32_t, key, cpp_key,   \
                                      value_ty, rust_value_ty, ffi_value_ty, \
                                      to_cpp_value, to_ffi_value);           \
  __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(uint32_t, u32, uint32_t, key, cpp_key, \
                                      value_ty, rust_value_ty, ffi_value_ty, \
                                      to_cpp_value, to_ffi_value);           \
  __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(bool, bool, bool, key, cpp_key,        \
                                      value_ty, rust_value_ty, ffi_value_ty, \
                                      to_cpp_value, to_ffi_value);           \
  __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(uint64_t, u64, uint64_t, key, cpp_key, \
                                      value_ty, rust_value_ty, ffi_value_ty, \
                                      to_cpp_value, to_ffi_value);           \
  __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(int64_t, i64, int64_t, key, cpp_key,   \
                                      value_ty, rust_value_ty, ffi_value_ty, \
                                      to_cpp_value, to_ffi_value);           \
  __PB_RUST_EXPOSE_SCALAR_MAP_METHODS(                                       \
      std::string, ProtoString, google::protobuf::rust_internal::PtrAndLen,            \
      std::string(key.ptr, key.len),                                         \
      google::protobuf::rust_internal::PtrAndLen(cpp_key.data(), cpp_key.size()),      \
      value_ty, rust_value_ty, ffi_value_ty, to_cpp_value, to_ffi_value);

#endif  // GOOGLE_PROTOBUF_RUST_CPP_KERNEL_MAP_H__