#include <cassert>
#include <cstdint>
#include <iostream>

#include "support.h"
#include "v8/include/libplatform/libplatform.h"
#include "v8/include/v8-inspector.h"
#include "v8/include/v8-platform.h"
#include "v8/include/v8.h"

using namespace support;

static_assert(sizeof(v8::ScriptOrigin) == sizeof(size_t) * 7,
              "ScriptOrigin size mismatch");

static_assert(sizeof(v8::HandleScope) == sizeof(size_t) * 3,
              "HandleScope size mismatch");

static_assert(sizeof(v8::EscapableHandleScope) == sizeof(size_t) * 4,
              "EscapableHandleScope size mismatch");

static_assert(sizeof(v8::PromiseRejectMessage) == sizeof(size_t) * 3,
              "PromiseRejectMessage size mismatch");

static_assert(sizeof(v8::Locker) == sizeof(size_t) * 2, "Locker size mismatch");

static_assert(sizeof(v8::ScriptCompiler::Source) == sizeof(size_t) * 8,
              "Source size mismatch");

static_assert(sizeof(v8::ReturnValue<v8::Value>) == sizeof(size_t) * 1,
              "ReturnValue size mismatch");

static_assert(sizeof(v8::TryCatch) == sizeof(size_t) * 6,
              "TryCatch size mismatch");

static_assert(sizeof(v8::Location) == sizeof(size_t) * 1,
              "Location size mismatch");

static_assert(sizeof(v8::SnapshotCreator) == sizeof(size_t) * 1,
              "SnapshotCreator size mismatch");

enum InternalSlots {
  kSlotDynamicImport = 0,
  kNumInternalSlots,
};
#define SLOT_NUM_EXTERNAL(isolate) \
  (isolate->GetNumberOfDataSlots() - kNumInternalSlots)
#define SLOT_INTERNAL(isolate, slot) \
  (isolate->GetNumberOfDataSlots() - 1 - slot)

// This is an extern C calling convention compatible version of
// v8::HostImportModuleDynamicallyCallback
typedef v8::Promise* (*v8__HostImportModuleDynamicallyCallback)(
    v8::Local<v8::Context> context, v8::Local<v8::ScriptOrModule> referrer,
    v8::Local<v8::String> specifier);

v8::MaybeLocal<v8::Promise> HostImportModuleDynamicallyCallback(
    v8::Local<v8::Context> context, v8::Local<v8::ScriptOrModule> referrer,
    v8::Local<v8::String> specifier) {
  auto* isolate = context->GetIsolate();
  void* d = isolate->GetData(SLOT_INTERNAL(isolate, kSlotDynamicImport));
  auto* callback = reinterpret_cast<v8__HostImportModuleDynamicallyCallback>(d);
  assert(callback != nullptr);
  auto* promise_ptr = callback(context, referrer, specifier);
  if (promise_ptr == nullptr) {
    return v8::MaybeLocal<v8::Promise>();
  } else {
    return v8::MaybeLocal<v8::Promise>(ptr_to_local(promise_ptr));
  }
}

extern "C" {
void v8__V8__SetFlagsFromCommandLine(int* argc, char** argv) {
  v8::V8::SetFlagsFromCommandLine(argc, argv, true);
}

const char* v8__V8__GetVersion() { return v8::V8::GetVersion(); }

void v8__V8__InitializePlatform(v8::Platform& platform) {
  v8::V8::InitializePlatform(&platform);
}

void v8__V8__Initialize() { v8::V8::Initialize(); }

bool v8__V8__Dispose() { return v8::V8::Dispose(); }

void v8__V8__ShutdownPlatform() { v8::V8::ShutdownPlatform(); }

// This function consumes the Isolate::CreateParams object. The Isolate takes
// ownership of the ArrayBuffer::Allocator referenced by the params object.
v8::Isolate* v8__Isolate__New(v8::Isolate::CreateParams& params) {
  auto isolate = v8::Isolate::New(params);
  delete &params;
  return isolate;
}

void v8__Isolate__Dispose(v8::Isolate* isolate) {
  auto allocator = isolate->GetArrayBufferAllocator();
  isolate->Dispose();
  delete allocator;
}

void v8__Isolate__Enter(v8::Isolate* isolate) { isolate->Enter(); }

void v8__Isolate__Exit(v8::Isolate* isolate) { isolate->Exit(); }

v8::Context* v8__Isolate__GetCurrentContext(v8::Isolate* isolate) {
  return local_to_ptr(isolate->GetCurrentContext());
}

void v8__Isolate__SetData(v8::Isolate* isolate, uint32_t slot, void* data) {
  isolate->SetData(slot, data);
}

void* v8__Isolate__GetData(v8::Isolate* isolate, uint32_t slot) {
  return isolate->GetData(slot);
}

uint32_t v8__Isolate__GetNumberOfDataSlots(v8::Isolate* isolate) {
  return SLOT_NUM_EXTERNAL(isolate);
}

void v8__Isolate__RunMicrotasks(v8::Isolate& isolate) {
  isolate.RunMicrotasks();
}

void v8__Isolate__EnqueueMicrotask(v8::Isolate& isolate,
                                   v8::Function* function) {
  isolate.EnqueueMicrotask(ptr_to_local(function));
}

void v8__Isolate__SetPromiseRejectCallback(v8::Isolate* isolate,
                                           v8::PromiseRejectCallback callback) {
  isolate->SetPromiseRejectCallback(callback);
}

void v8__Isolate__SetCaptureStackTraceForUncaughtExceptions(
    v8::Isolate* isolate, bool capture, int frame_limit) {
  isolate->SetCaptureStackTraceForUncaughtExceptions(capture, frame_limit);
}

void v8__Isolate__SetHostInitializeImportMetaObjectCallback(
    v8::Isolate* isolate, v8::HostInitializeImportMetaObjectCallback callback) {
  isolate->SetHostInitializeImportMetaObjectCallback(callback);
}

void v8__Isolate__SetHostImportModuleDynamicallyCallback(
    v8::Isolate* isolate, v8__HostImportModuleDynamicallyCallback callback) {
  isolate->SetData(SLOT_INTERNAL(isolate, kSlotDynamicImport),
                   reinterpret_cast<void*>(callback));
  isolate->SetHostImportModuleDynamicallyCallback(
      HostImportModuleDynamicallyCallback);
}

bool v8__Isolate__AddMessageListener(v8::Isolate& isolate,
                                     v8::MessageCallback callback) {
  return isolate.AddMessageListener(callback);
}

v8::Value* v8__Isolate__ThrowException(v8::Isolate& isolate,
                                       v8::Value* exception) {
  return local_to_ptr(isolate.ThrowException(ptr_to_local(exception)));
}

void v8__Isolate__TerminateExecution(v8::Isolate& isolate) {
  isolate.TerminateExecution();
}

bool v8__Isolate__IsExecutionTerminating(v8::Isolate& isolate) {
  return isolate.IsExecutionTerminating();
}

void v8__Isolate__CancelTerminateExecution(v8::Isolate& isolate) {
  isolate.CancelTerminateExecution();
}

v8::Isolate::CreateParams* v8__Isolate__CreateParams__NEW() {
  return new v8::Isolate::CreateParams();
}

// This function is only called if the Isolate::CreateParams object is *not*
// consumed by Isolate::New().
void v8__Isolate__CreateParams__DELETE(v8::Isolate::CreateParams& self) {
  delete self.array_buffer_allocator;
  delete &self;
}

// This function takes ownership of the ArrayBuffer::Allocator.
void v8__Isolate__CreateParams__SET__array_buffer_allocator(
    v8::Isolate::CreateParams& self, v8::ArrayBuffer::Allocator* value) {
  delete self.array_buffer_allocator;
  self.array_buffer_allocator = value;
}

// external_references should probably have static lifetime.
void v8__Isolate__CreateParams__SET__external_references(
    v8::Isolate::CreateParams& self, const intptr_t* external_references) {
  assert(self.external_references == nullptr);
  self.external_references = external_references;
}

// This function does not take ownership of the StartupData.
void v8__Isolate__CreateParams__SET__snapshot_blob(
    v8::Isolate::CreateParams& self, v8::StartupData* snapshot_blob) {
  self.snapshot_blob = snapshot_blob;
}

void v8__HandleScope__CONSTRUCT(uninit_t<v8::HandleScope>& buf,
                                v8::Isolate* isolate) {
  construct_in_place<v8::HandleScope>(buf, isolate);
}

void v8__HandleScope__DESTRUCT(v8::HandleScope& self) { self.~HandleScope(); }

v8::Isolate* v8__HandleScope__GetIsolate(const v8::HandleScope& self) {
  return self.GetIsolate();
}

void v8__EscapableHandleScope__CONSTRUCT(
    uninit_t<v8::EscapableHandleScope>& buf, v8::Isolate* isolate) {
  construct_in_place<v8::EscapableHandleScope>(buf, isolate);
}

void v8__EscapableHandleScope__DESTRUCT(v8::EscapableHandleScope& self) {
  self.~EscapableHandleScope();
}

v8::Value* v8__EscapableHandleScope__Escape(v8::EscapableHandleScope& self,
                                            v8::Local<v8::Value> value) {
  return local_to_ptr(self.Escape(value));
}

v8::Isolate* v8__EscapableHandleScope__GetIsolate(
    const v8::EscapableHandleScope& self) {
  return self.GetIsolate();
}

void v8__Locker__CONSTRUCT(uninit_t<v8::Locker>& buf, v8::Isolate* isolate) {
  construct_in_place<v8::Locker>(buf, isolate);
}

void v8__Locker__DESTRUCT(v8::Locker& self) { self.~Locker(); }

v8::Value* v8__Local__New(v8::Isolate* isolate, v8::Value* other) {
  return local_to_ptr(v8::Local<v8::Value>::New(isolate, ptr_to_local(other)));
}

v8::Value* v8__Global__New(v8::Isolate* isolate, v8::Value* other) {
  auto global = v8::Global<v8::Value>(isolate, ptr_to_local(other));
  return global_to_ptr(global);
}

void v8__Global__Reset__0(v8::Value*& self) {
  auto global = ptr_to_global(self);
  global.Reset();
  self = global_to_ptr(global);
}

void v8__Global__Reset__2(v8::Value*& self, v8::Isolate* isolate,
                          v8::Value* const& other) {
  auto global = ptr_to_global(self);
  global.Reset(isolate, ptr_to_local(other));
  self = global_to_ptr(global);
}

void v8__ScriptCompiler__Source__CONSTRUCT(
    uninit_t<v8::ScriptCompiler::Source>& buf, v8::String* source_string,
    v8::ScriptOrigin& origin) {
  construct_in_place<v8::ScriptCompiler::Source>(
      buf, ptr_to_local(source_string), origin);
}

void v8__ScriptCompiler__Source__DESTRUCT(v8::ScriptCompiler::Source& self) {
  self.~Source();
}

v8::Module* v8__ScriptCompiler__CompileModule(
    v8::Isolate* isolate, v8::ScriptCompiler::Source* source,
    v8::ScriptCompiler::CompileOptions options,
    v8::ScriptCompiler::NoCacheReason no_cache_reason) {
  v8::MaybeLocal<v8::Module> maybe_local = v8::ScriptCompiler::CompileModule(
      isolate, source, options, no_cache_reason);
  if (maybe_local.IsEmpty()) {
    return nullptr;
  } else {
    return local_to_ptr(maybe_local.ToLocalChecked());
  }
}

bool v8__Value__IsUndefined(const v8::Value& self) {
  return self.IsUndefined();
}

bool v8__Value__IsNull(const v8::Value& self) { return self.IsNull(); }

bool v8__Value__IsNullOrUndefined(const v8::Value& self) {
  return self.IsNullOrUndefined();
}

bool v8__Value__IsTrue(const v8::Value& self) { return self.IsTrue(); }

bool v8__Value__IsFalse(const v8::Value& self) { return self.IsFalse(); }

bool v8__Value__IsName(const v8::Value& self) { return self.IsName(); }

bool v8__Value__IsString(const v8::Value& self) { return self.IsString(); }

bool v8__Value__IsSymbol(const v8::Value& self) { return self.IsSymbol(); }

bool v8__Value__IsFunction(const v8::Value& self) { return self.IsFunction(); }

bool v8__Value__IsArray(const v8::Value& self) { return self.IsArray(); }

bool v8__Value__IsObject(const v8::Value& self) { return self.IsObject(); }

bool v8__Value__IsBigInt(const v8::Value& self) { return self.IsBigInt(); }

bool v8__Value__IsBoolean(const v8::Value& self) { return self.IsBoolean(); }

bool v8__Value__IsNumber(const v8::Value& self) { return self.IsNumber(); }

bool v8__Value__IsExternal(const v8::Value& self) { return self.IsExternal(); }

bool v8__Value__IsInt32(const v8::Value& self) { return self.IsInt32(); }

bool v8__Value__IsUint32(const v8::Value& self) { return self.IsUint32(); }

bool v8__Value__IsDate(const v8::Value& self) { return self.IsDate(); }

bool v8__Value__IsArgumentsObject(const v8::Value& self) {
  return self.IsArgumentsObject();
}

bool v8__Value__IsBigIntObject(const v8::Value& self) {
  return self.IsBigIntObject();
}

bool v8__Value__IsBooleanObject(const v8::Value& self) {
  return self.IsBooleanObject();
}

bool v8__Value__IsNumberObject(const v8::Value& self) {
  return self.IsNumberObject();
}

bool v8__Value__IsStringObject(const v8::Value& self) {
  return self.IsStringObject();
}

bool v8__Value__IsSymbolObject(const v8::Value& self) {
  return self.IsSymbolObject();
}

bool v8__Value__IsNativeError(const v8::Value& self) {
  return self.IsNativeError();
}

bool v8__Value__IsRegExp(const v8::Value& self) { return self.IsRegExp(); }

bool v8__Value__IsAsyncFunction(const v8::Value& self) {
  return self.IsAsyncFunction();
}

bool v8__Value__IsGeneratorFunction(const v8::Value& self) {
  return self.IsGeneratorFunction();
}

bool v8__Value__IsGeneratorObject(const v8::Value& self) {
  return self.IsGeneratorObject();
}

bool v8__Value__IsPromise(const v8::Value& self) { return self.IsPromise(); }

bool v8__Value__IsMap(const v8::Value& self) { return self.IsMap(); }

bool v8__Value__IsSet(const v8::Value& self) { return self.IsSet(); }

bool v8__Value__IsMapIterator(const v8::Value& self) {
  return self.IsMapIterator();
}

bool v8__Value__IsSetIterator(const v8::Value& self) {
  return self.IsSetIterator();
}

bool v8__Value__IsWeakMap(const v8::Value& self) { return self.IsWeakMap(); }

bool v8__Value__IsWeakSet(const v8::Value& self) { return self.IsWeakSet(); }

bool v8__Value__IsArrayBuffer(const v8::Value& self) {
  return self.IsArrayBuffer();
}

bool v8__Value__IsArrayBufferView(const v8::Value& self) {
  return self.IsArrayBufferView();
}

bool v8__Value__IsTypedArray(const v8::Value& self) {
  return self.IsTypedArray();
}

bool v8__Value__IsUint8Array(const v8::Value& self) {
  return self.IsUint8Array();
}

bool v8__Value__IsUint8ClampedArray(const v8::Value& self) {
  return self.IsUint8ClampedArray();
}

bool v8__Value__IsInt8Array(const v8::Value& self) {
  return self.IsInt8Array();
}

bool v8__Value__IsUint16Array(const v8::Value& self) {
  return self.IsUint16Array();
}

bool v8__Value__IsInt16Array(const v8::Value& self) {
  return self.IsInt16Array();
}

bool v8__Value__IsUint32Array(const v8::Value& self) {
  return self.IsUint32Array();
}

bool v8__Value__IsInt32Array(const v8::Value& self) {
  return self.IsInt32Array();
}

bool v8__Value__IsFloat32Array(const v8::Value& self) {
  return self.IsFloat32Array();
}

bool v8__Value__IsFloat64Array(const v8::Value& self) {
  return self.IsFloat64Array();
}

bool v8__Value__IsBigInt64Array(const v8::Value& self) {
  return self.IsBigInt64Array();
}

bool v8__Value__IsBigUint64Array(const v8::Value& self) {
  return self.IsBigUint64Array();
}

bool v8__Value__IsDataView(const v8::Value& self) { return self.IsDataView(); }

bool v8__Value__IsSharedArrayBuffer(const v8::Value& self) {
  return self.IsSharedArrayBuffer();
}

bool v8__Value__IsProxy(const v8::Value& self) { return self.IsProxy(); }

bool v8__Value__IsWebAssemblyCompiledModule(const v8::Value& self) {
  return self.IsWebAssemblyCompiledModule();
}

bool v8__Value__IsModuleNamespaceObject(const v8::Value& self) {
  return self.IsModuleNamespaceObject();
}

bool v8__Value__StrictEquals(const v8::Value& self, v8::Value* that) {
  return self.StrictEquals(ptr_to_local(that));
}

bool v8__Value__SameValue(const v8::Value& self, v8::Value* that) {
  return self.SameValue(ptr_to_local(that));
}

v8::String* v8__Value__ToString(const v8::Value& self, v8::Context* context) {
  return maybe_local_to_ptr(self.ToString(ptr_to_local(context)));
}

v8::Number* v8__Value__ToNumber(const v8::Value& self, v8::Context* context) {
  return maybe_local_to_ptr(self.ToNumber(ptr_to_local(context)));
}

v8::Object* v8__Value__ToObject(const v8::Value& self, v8::Context* context) {
  return maybe_local_to_ptr(self.ToObject(ptr_to_local(context)));
}

v8::Primitive* v8__Null(v8::Isolate* isolate) {
  return local_to_ptr(v8::Null(isolate));
}

v8::Primitive* v8__Undefined(v8::Isolate* isolate) {
  return local_to_ptr(v8::Undefined(isolate));
}

v8::Boolean* v8__True(v8::Isolate* isolate) {
  return local_to_ptr(v8::True(isolate));
}

v8::Boolean* v8__False(v8::Isolate* isolate) {
  return local_to_ptr(v8::False(isolate));
}

v8::PrimitiveArray* v8__PrimitiveArray__New(v8::Isolate* isolate, int length) {
  return local_to_ptr(v8::PrimitiveArray::New(isolate, length));
}

int v8__PrimitiveArray__Length(v8::PrimitiveArray& self) {
  return self.Length();
}

void v8__PrimitiveArray__Set(v8::PrimitiveArray& self, v8::Isolate* isolate,
                             int index, v8::Local<v8::Primitive> item) {
  self.Set(isolate, index, item);
}

v8::Primitive* v8__PrimitiveArray__Get(v8::PrimitiveArray& self,
                                       v8::Isolate* isolate, int index) {
  return local_to_ptr(self.Get(isolate, index));
}

v8::BackingStore* v8__ArrayBuffer__NewBackingStore(v8::Isolate* isolate,
                                                   size_t length) {
  std::unique_ptr<v8::BackingStore> u =
      v8::ArrayBuffer::NewBackingStore(isolate, length);
  return u.release();
}

two_pointers_t v8__ArrayBuffer__GetBackingStore(v8::ArrayBuffer& self) {
  return make_pod<two_pointers_t>(self.GetBackingStore());
}

void* v8__BackingStore__Data(v8::BackingStore& self) { return self.Data(); }

size_t v8__BackingStore__ByteLength(v8::BackingStore& self) {
  return self.ByteLength();
}

bool v8__BackingStore__IsShared(v8::BackingStore& self) {
  return self.IsShared();
}

void v8__BackingStore__DELETE(v8::BackingStore& self) { delete &self; }

v8::BackingStore* std__shared_ptr__v8__BackingStore__get(
    const std::shared_ptr<v8::BackingStore>& ptr) {
  return ptr.get();
}

void std__shared_ptr__v8__BackingStore__reset(
    std::shared_ptr<v8::BackingStore>& ptr) {
  ptr.reset();
}

long std__shared_ptr__v8__BackingStore__use_count(
    const std::shared_ptr<v8::BackingStore>& ptr) {
  return ptr.use_count();
}

v8::String* v8__String__NewFromUtf8(v8::Isolate* isolate, const char* data,
                                    v8::NewStringType type, int length) {
  return maybe_local_to_ptr(
      v8::String::NewFromUtf8(isolate, data, type, length));
}

int v8__String__Length(const v8::String& self) { return self.Length(); }

int v8__String__Utf8Length(const v8::String& self, v8::Isolate* isolate) {
  return self.Utf8Length(isolate);
}

int v8__String__WriteUtf8(const v8::String& self, v8::Isolate* isolate,
                          char* buffer, int length, int* nchars_ref,
                          int options) {
  return self.WriteUtf8(isolate, buffer, length, nchars_ref, options);
}

v8::Object* v8__Object__New(v8::Isolate* isolate) {
  return local_to_ptr(v8::Object::New(isolate));
}

v8::Object* v8__Object__New2(v8::Isolate* isolate,
                             v8::Local<v8::Value> prototype_or_null,
                             v8::Local<v8::Name>* names,
                             v8::Local<v8::Value>* values, size_t length) {
  return local_to_ptr(
      v8::Object::New(isolate, prototype_or_null, names, values, length));
}

v8::Value* v8__Object__Get(v8::Object& self, v8::Local<v8::Context> context,
                           v8::Local<v8::Value> key) {
  return maybe_local_to_ptr(self.Get(context, key));
}

MaybeBool v8__Object__Set(v8::Object& self, v8::Local<v8::Context> context,
                          v8::Local<v8::Value> key,
                          v8::Local<v8::Value> value) {
  return maybe_to_maybe_bool(self.Set(context, key, value));
}

MaybeBool v8__Object__CreateDataProperty(v8::Object& self,
                                         v8::Local<v8::Context> context,
                                         v8::Local<v8::Name> key,
                                         v8::Local<v8::Value> value) {
  return maybe_to_maybe_bool(self.CreateDataProperty(context, key, value));
}

MaybeBool v8__Object__SetAccessor(v8::Object& self,
                                  v8::Local<v8::Context> context,
                                  v8::Local<v8::Name> key,
                                  v8::AccessorNameGetterCallback getter) {
  return maybe_to_maybe_bool(self.SetAccessor(context, key, getter));
}

v8::Isolate* v8__Object__GetIsolate(v8::Object& self) {
  return self.GetIsolate();
}

int v8__Object__GetIdentityHash(v8::Object& self) {
  return self.GetIdentityHash();
}

v8::Array* v8__Array__New(v8::Isolate* isolate, int length) {
  return local_to_ptr(v8::Array::New(isolate, length));
}

v8::Number* v8__Number__New(v8::Isolate* isolate, double value) {
  return *v8::Number::New(isolate, value);
}

double v8__Number__Value(const v8::Number& self) { return self.Value(); }

v8::Integer* v8__Integer__New(v8::Isolate* isolate, int32_t value) {
  return *v8::Integer::New(isolate, value);
}

v8::Integer* v8__Integer__NewFromUnsigned(v8::Isolate* isolate,
                                          uint32_t value) {
  return *v8::Integer::NewFromUnsigned(isolate, value);
}

int64_t v8__Integer__Value(const v8::Integer& self) { return self.Value(); }

v8::ArrayBuffer* v8__ArrayBufferView__Buffer(v8::ArrayBufferView& self) {
  return local_to_ptr(self.Buffer());
}

size_t v8__ArrayBufferView__ByteLength(v8::ArrayBufferView& self) {
  return self.ByteLength();
}

size_t v8__ArrayBufferView__ByteOffset(v8::ArrayBufferView& self) {
  return self.ByteOffset();
}

size_t v8__ArrayBufferView__CopyContents(v8::ArrayBufferView& self, void* dest,
                                         int byte_length) {
  return self.CopyContents(dest, byte_length);
}

v8::ArrayBuffer::Allocator* v8__ArrayBuffer__Allocator__NewDefaultAllocator() {
  return v8::ArrayBuffer::Allocator::NewDefaultAllocator();
}

void v8__ArrayBuffer__Allocator__DELETE(v8::ArrayBuffer::Allocator& self) {
  delete &self;
}

v8::ArrayBuffer* v8__ArrayBuffer__New__byte_length(v8::Isolate* isolate,
                                                   size_t byte_length) {
  return local_to_ptr(v8::ArrayBuffer::New(isolate, byte_length));
}

v8::ArrayBuffer* v8__ArrayBuffer__New__backing_store(
    v8::Isolate* isolate, std::shared_ptr<v8::BackingStore>& backing_store) {
  return local_to_ptr(v8::ArrayBuffer::New(isolate, backing_store));
}

size_t v8__ArrayBuffer__ByteLength(v8::ArrayBuffer& self) {
  return self.ByteLength();
}

struct InternalFieldData {
  uint32_t data;
};

std::vector<InternalFieldData*> deserialized_data;

void DeserializeInternalFields(v8::Local<v8::Object> holder, int index,
                               v8::StartupData payload, void* data) {
  assert(data == nullptr);
  if (payload.raw_size == 0) {
    holder->SetAlignedPointerInInternalField(index, nullptr);
    return;
  }
  InternalFieldData* embedder_field = new InternalFieldData{0};
  memcpy(embedder_field, payload.data, payload.raw_size);
  holder->SetAlignedPointerInInternalField(index, embedder_field);
  deserialized_data.push_back(embedder_field);
}

v8::Context* v8__Context__New(v8::Isolate* isolate) {
  // TODO: optional arguments.
  return *v8::Context::New(isolate, nullptr,
                           v8::MaybeLocal<v8::ObjectTemplate>(),
                           v8::MaybeLocal<v8::Value>(),
                           v8::DeserializeInternalFieldsCallback(
                               DeserializeInternalFields, nullptr));
}

void v8__Context__Enter(v8::Context& self) { self.Enter(); }

void v8__Context__Exit(v8::Context& self) { self.Exit(); }

v8::Isolate* v8__Context__GetIsolate(v8::Context& self) {
  return self.GetIsolate();
}

v8::Object* v8__Context__Global(v8::Context& self) { return *self.Global(); }

v8::String* v8__Message__Get(const v8::Message* self) {
  return local_to_ptr(self->Get());
}

v8::String* v8__Message__GetSourceLine(const v8::Message& self,
                                       v8::Context* context) {
  return maybe_local_to_ptr(self.GetSourceLine(ptr_to_local(context)));
}

v8::Value* v8__Message__GetScriptResourceName(const v8::Message& self) {
  return local_to_ptr(self.GetScriptResourceName());
}

int v8__Message__GetLineNumber(const v8::Message& self, v8::Context* context) {
  v8::Maybe<int> maybe = self.GetLineNumber(ptr_to_local(context));
  if (maybe.IsJust()) {
    return maybe.ToChecked();
  } else {
    return -1;
  }
}

v8::StackTrace* v8__Message__GetStackTrace(v8::Message& self) {
  return local_to_ptr(self.GetStackTrace());
}

int v8__Message__GetStartPosition(const v8::Message& self) {
  return self.GetStartPosition();
}

int v8__Message__GetEndPosition(const v8::Message& self) {
  return self.GetEndPosition();
}

int v8__Message__GetWasmFunctionIndex(const v8::Message& self) {
  return self.GetWasmFunctionIndex();
}

int v8__Message__ErrorLevel(const v8::Message& self) {
  return self.ErrorLevel();
}

int v8__Message__GetStartColumn(const v8::Message& self) {
  return self.GetStartColumn();
}

int v8__Message__GetEndColumn(const v8::Message& self) {
  return self.GetEndColumn();
}

bool v8__Message__IsSharedCrossOrigin(const v8::Message& self) {
  return self.IsSharedCrossOrigin();
}

bool v8__Message__IsOpaque(const v8::Message& self) { return self.IsOpaque(); }

v8::Isolate* v8__Message__GetIsolate(const v8::Message* self) {
  return self->GetIsolate();
}

v8::Value* v8__Exception__RangeError(v8::Local<v8::String> message) {
  return local_to_ptr(v8::Exception::RangeError(message));
}

v8::Value* v8__Exception__ReferenceError(v8::Local<v8::String> message) {
  return local_to_ptr(v8::Exception::ReferenceError(message));
}

v8::Value* v8__Exception__SyntaxError(v8::Local<v8::String> message) {
  return local_to_ptr(v8::Exception::SyntaxError(message));
}

v8::Value* v8__Exception__TypeError(v8::Local<v8::String> message) {
  return local_to_ptr(v8::Exception::TypeError(message));
}

v8::Value* v8__Exception__Error(v8::Local<v8::String> message) {
  return local_to_ptr(v8::Exception::Error(message));
}

v8::Message* v8__Exception__CreateMessage(v8::Isolate* isolate,
                                          v8::Local<v8::Value> exception) {
  return local_to_ptr(v8::Exception::CreateMessage(isolate, exception));
}

v8::StackTrace* v8__Exception__GetStackTrace(v8::Local<v8::Value> exception) {
  return local_to_ptr(v8::Exception::GetStackTrace(exception));
}

v8::Function* v8__Function__New(v8::Local<v8::Context> context,
                                v8::FunctionCallback callback) {
  return maybe_local_to_ptr(v8::Function::New(context, callback));
}

v8::Value* v8__Function__Call(v8::Function* self,
                              v8::Local<v8::Context> context,
                              v8::Local<v8::Value> recv, int argc,
                              v8::Local<v8::Value> argv[]) {
  return maybe_local_to_ptr(self->Call(context, recv, argc, argv));
}

v8::FunctionTemplate* v8__FunctionTemplate__New(
    v8::Isolate* isolate, v8::FunctionCallback callback = nullptr) {
  return local_to_ptr(v8::FunctionTemplate::New(isolate, callback));
}

v8::Function* v8__FunctionTemplate__GetFunction(
    v8::Local<v8::FunctionTemplate> self, v8::Local<v8::Context> context) {
  return maybe_local_to_ptr(self->GetFunction(context));
}
int v8__FunctionCallbackInfo__Length(
    const v8::FunctionCallbackInfo<v8::Value>& self) {
  return self.Length();
}

v8::Isolate* v8__FunctionCallbackInfo__GetIsolate(
    const v8::FunctionCallbackInfo<v8::Value>& self) {
  return self.GetIsolate();
}

void v8__FunctionCallbackInfo__GetReturnValue(
    const v8::FunctionCallbackInfo<v8::Value>& self,
    v8::ReturnValue<v8::Value>* out) {
  *out = self.GetReturnValue();
}

v8::Value* v8__FunctionCallbackInfo__GetArgument(
    const v8::FunctionCallbackInfo<v8::Value>& self, int i) {
  return local_to_ptr(self[i]);
}

void v8__ReturnValue__Set(v8::ReturnValue<v8::Value>& self,
                          v8::Local<v8::Value> value) {
  self.Set(value);
}

v8::Value* v8__ReturnValue__Get(const v8::ReturnValue<v8::Value>& self) {
  return local_to_ptr(self.Get());
}

v8::Isolate* v8__ReturnValue__GetIsolate(v8::ReturnValue<v8::Value>& self) {
  return self.GetIsolate();
}

int v8__StackTrace__GetFrameCount(v8::StackTrace* self) {
  return self->GetFrameCount();
}

v8::StackFrame* v8__StackTrace__GetFrame(v8::StackTrace& self,
                                         v8::Isolate* isolate, uint32_t index) {
  return local_to_ptr(self.GetFrame(isolate, index));
}

int v8__StackFrame__GetLineNumber(v8::StackFrame& self) {
  return self.GetLineNumber();
}

int v8__StackFrame__GetColumn(v8::StackFrame& self) { return self.GetColumn(); }

int v8__StackFrame__GetScriptId(v8::StackFrame& self) {
  return self.GetScriptId();
}

v8::String* v8__StackFrame__GetScriptName(v8::StackFrame& self) {
  return local_to_ptr(self.GetScriptName());
}

v8::String* v8__StackFrame__GetScriptNameOrSourceURL(v8::StackFrame& self) {
  return local_to_ptr(self.GetScriptNameOrSourceURL());
}

v8::String* v8__StackFrame__GetFunctionName(v8::StackFrame& self) {
  return local_to_ptr(self.GetFunctionName());
}

bool v8__StackFrame__IsEval(v8::StackFrame& self) { return self.IsEval(); }

bool v8__StackFrame__IsConstructor(v8::StackFrame& self) {
  return self.IsConstructor();
}

bool v8__StackFrame__IsWasm(v8::StackFrame& self) { return self.IsWasm(); }

bool v8__StackFrame__IsUserJavaScript(v8::StackFrame& self) {
  return self.IsUserJavaScript();
}

void v8__TryCatch__CONSTRUCT(uninit_t<v8::TryCatch>& buf,
                             v8::Isolate* isolate) {
  construct_in_place<v8::TryCatch>(buf, isolate);
}

void v8__TryCatch__DESTRUCT(v8::TryCatch& self) { self.~TryCatch(); }

bool v8__TryCatch__HasCaught(const v8::TryCatch& self) {
  return self.HasCaught();
}

bool v8__TryCatch__CanContinue(const v8::TryCatch& self) {
  return self.CanContinue();
}

bool v8__TryCatch__HasTerminated(const v8::TryCatch& self) {
  return self.HasTerminated();
}

v8::Value* v8__TryCatch__Exception(const v8::TryCatch& self) {
  return local_to_ptr(self.Exception());
}

v8::Value* v8__TryCatch__StackTrace(const v8::TryCatch& self,
                                    v8::Local<v8::Context> context) {
  return maybe_local_to_ptr(self.StackTrace(context));
}

v8::Message* v8__TryCatch__Message(const v8::TryCatch& self) {
  return local_to_ptr(self.Message());
}

void v8__TryCatch__Reset(v8::TryCatch& self) { self.Reset(); }

v8::Value* v8__TryCatch__ReThrow(v8::TryCatch& self) {
  return local_to_ptr(self.ReThrow());
}

bool v8__TryCatch__IsVerbose(const v8::TryCatch& self) {
  return self.IsVerbose();
}

void v8__TryCatch__SetVerbose(v8::TryCatch& self, bool value) {
  self.SetVerbose(value);
}

void v8__TryCatch__SetCaptureMessage(v8::TryCatch& self, bool value) {
  self.SetCaptureMessage(value);
}

v8::Uint8Array* v8__Uint8Array__New(v8::ArrayBuffer* buf_ptr,
                                    size_t byte_offset, size_t length) {
  return local_to_ptr(
      v8::Uint8Array::New(ptr_to_local(buf_ptr), byte_offset, length));
}

v8::Script* v8__Script__Compile(v8::Context* context, v8::String* source,
                                v8::ScriptOrigin* origin) {
  return maybe_local_to_ptr(
      v8::Script::Compile(ptr_to_local(context), ptr_to_local(source), origin));
}

v8::Value* v8__Script__Run(v8::Script& script, v8::Context* context) {
  return maybe_local_to_ptr(script.Run(ptr_to_local(context)));
}

void v8__ScriptOrigin__CONSTRUCT(
    uninit_t<v8::ScriptOrigin>& buf, v8::Value* resource_name,
    v8::Integer* resource_line_offset, v8::Integer* resource_column_offset,
    v8::Boolean* resource_is_shared_cross_origin, v8::Integer* script_id,
    v8::Value* source_map_url, v8::Boolean* resource_is_opaque,
    v8::Boolean* is_wasm, v8::Boolean* is_module) {
  construct_in_place<v8::ScriptOrigin>(
      buf, ptr_to_local(resource_name), ptr_to_local(resource_line_offset),
      ptr_to_local(resource_column_offset),
      ptr_to_local(resource_is_shared_cross_origin), ptr_to_local(script_id),
      ptr_to_local(source_map_url), ptr_to_local(resource_is_opaque),
      ptr_to_local(is_wasm), ptr_to_local(is_module));
}

v8::Value* v8__ScriptOrModule__GetResourceName(v8::ScriptOrModule& self) {
  return local_to_ptr(self.GetResourceName());
}

v8::PrimitiveArray* v8__ScriptOrModule__GetHostDefinedOptions(
    v8::ScriptOrModule& self) {
  return local_to_ptr(self.GetHostDefinedOptions());
}

v8::SharedArrayBuffer* v8__SharedArrayBuffer__New(v8::Isolate* isolate,
                                                  size_t byte_length) {
  return local_to_ptr(v8::SharedArrayBuffer::New(isolate, byte_length));
}

size_t v8__SharedArrayBuffer__ByteLength(v8::SharedArrayBuffer& self) {
  return self.ByteLength();
}

two_pointers_t v8__SharedArrayBuffer__GetBackingStore(
    v8::SharedArrayBuffer& self) {
  return make_pod<two_pointers_t>(self.GetBackingStore());
}

v8::Value* v8__JSON__Parse(v8::Local<v8::Context> context,
                           v8::Local<v8::String> json_string) {
  return maybe_local_to_ptr(v8::JSON::Parse(context, json_string));
}

v8::String* v8__JSON__Stringify(v8::Local<v8::Context> context,
                                v8::Local<v8::Value> json_object) {
  return maybe_local_to_ptr(v8::JSON::Stringify(context, json_object));
}

v8::Promise::Resolver* v8__Promise__Resolver__New(
    v8::Local<v8::Context> context) {
  return maybe_local_to_ptr(v8::Promise::Resolver::New(context));
}

v8::Promise* v8__Promise__Resolver__GetPromise(v8::Promise::Resolver* self) {
  return local_to_ptr(self->GetPromise());
}

MaybeBool v8__Promise__Resolver__Resolve(v8::Promise::Resolver* self,
                                         v8::Local<v8::Context> context,
                                         v8::Local<v8::Value> value) {
  return maybe_to_maybe_bool(self->Resolve(context, value));
}

MaybeBool v8__Promise__Resolver__Reject(v8::Promise::Resolver* self,
                                        v8::Local<v8::Context> context,
                                        v8::Local<v8::Value> value) {
  return maybe_to_maybe_bool(self->Reject(context, value));
}

v8::Promise::PromiseState v8__Promise__State(v8::Promise* self) {
  return self->State();
}

bool v8__Promise__HasHandler(v8::Promise* self) { return self->HasHandler(); }

v8::Value* v8__Promise__Result(v8::Promise* self) {
  return local_to_ptr(self->Result());
}

v8::Promise* v8__Promise__Catch(v8::Promise* self,
                                v8::Local<v8::Context> context,
                                v8::Local<v8::Function> handler) {
  return maybe_local_to_ptr(self->Catch(context, handler));
}

v8::Promise* v8__Promise__Then(v8::Promise* self,
                               v8::Local<v8::Context> context,
                               v8::Local<v8::Function> handler) {
  return maybe_local_to_ptr(self->Then(context, handler));
}

v8::Promise* v8__Promise__Then2(v8::Promise* self,
                                v8::Local<v8::Context> context,
                                v8::Local<v8::Function> on_fulfilled,
                                v8::Local<v8::Function> on_rejected) {
  return maybe_local_to_ptr(self->Then(context, on_fulfilled, on_rejected));
}

v8::PromiseRejectEvent v8__PromiseRejectMessage__GetEvent(
    const v8::PromiseRejectMessage& self) {
  return self.GetEvent();
}

v8::Promise* v8__PromiseRejectMessage__GetPromise(
    const v8::PromiseRejectMessage& self) {
  return local_to_ptr(self.GetPromise());
}

v8::Value* v8__PromiseRejectMessage__GetValue(
    const v8::PromiseRejectMessage& self) {
  return local_to_ptr(self.GetValue());
}

v8::Isolate* v8__PropertyCallbackInfo__GetIsolate(
    const v8::PropertyCallbackInfo<v8::Value>& self) {
  return self.GetIsolate();
}

v8::Object* v8__PropertyCallbackInfo__This(
    const v8::PropertyCallbackInfo<v8::Value>& self) {
  return local_to_ptr(self.This());
}

void v8__PropertyCallbackInfo__GetReturnValue(
    const v8::PropertyCallbackInfo<v8::Value>& self,
    v8::ReturnValue<v8::Value>* out) {
  *out = self.GetReturnValue();
}

void v8__SnapshotCreator__CONSTRUCT(uninit_t<v8::SnapshotCreator>& buf,
                                    const intptr_t* external_references) {
  construct_in_place<v8::SnapshotCreator>(buf, external_references);
}

void v8__SnapshotCreator__DESTRUCT(v8::SnapshotCreator& self) {
  self.~SnapshotCreator();
}

void v8__StartupData__DESTRUCT(v8::StartupData& self) { delete[] self.data; }

v8::Isolate* v8__SnapshotCreator__GetIsolate(v8::SnapshotCreator& self) {
  return self.GetIsolate();
}

v8::StartupData SerializeInternalFields(v8::Local<v8::Object> holder, int index,
                                        void* data) {
  assert(data == nullptr);
  InternalFieldData* embedder_field = static_cast<InternalFieldData*>(
      holder->GetAlignedPointerFromInternalField(index));
  if (embedder_field == nullptr) return {nullptr, 0};
  int size = sizeof(*embedder_field);
  char* payload = new char[size];
  // We simply use memcpy to serialize the content.
  memcpy(payload, embedder_field, size);
  return {payload, size};
}

void v8__SnapshotCreator__SetDefaultContext(v8::SnapshotCreator& self,
                                            v8::Local<v8::Context> context) {
  self.SetDefaultContext(context, SerializeInternalFields);
}

v8::StartupData v8__SnapshotCreator__CreateBlob(
    v8::SnapshotCreator* self,
    v8::SnapshotCreator::FunctionCodeHandling function_code_handling) {
  return self->CreateBlob(function_code_handling);
}

v8::Platform* v8__platform__NewDefaultPlatform() {
  // TODO: support optional arguments.
  return v8::platform::NewDefaultPlatform().release();
}

void v8__Platform__DELETE(v8::Platform& self) { delete &self; }
void v8__Task__BASE__DELETE(v8::Task& self);
void v8__Task__BASE__Run(v8::Task& self);

struct v8__Task__BASE : public v8::Task {
  using Task::Task;
  void operator delete(void* ptr) noexcept {
    v8__Task__BASE__DELETE(*reinterpret_cast<v8::Task*>(ptr));
  }
  void Run() override { v8__Task__BASE__Run(*this); }
};

void v8__Task__BASE__CONSTRUCT(uninit_t<v8__Task__BASE>& buf) {
  construct_in_place<v8__Task__BASE>(buf);
}
void v8__Task__DELETE(v8::Task& self) { delete &self; }
void v8__Task__Run(v8::Task& self) { self.Run(); }

void v8_inspector__V8Inspector__Channel__BASE__sendResponse(
    v8_inspector::V8Inspector::Channel& self, int callId,
    v8_inspector::StringBuffer* message);
void v8_inspector__V8Inspector__Channel__BASE__sendNotification(
    v8_inspector::V8Inspector::Channel& self,
    v8_inspector::StringBuffer* message);
void v8_inspector__V8Inspector__Channel__BASE__flushProtocolNotifications(
    v8_inspector::V8Inspector::Channel& self);
}  // extern "C"

struct v8_inspector__V8Inspector__Channel__BASE
    : public v8_inspector::V8Inspector::Channel {
  using v8_inspector::V8Inspector::Channel::Channel;

  void sendResponse(
      int callId,
      std::unique_ptr<v8_inspector::StringBuffer> message) override {
    v8_inspector__V8Inspector__Channel__BASE__sendResponse(*this, callId,
                                                           message.release());
  }
  void sendNotification(
      std::unique_ptr<v8_inspector::StringBuffer> message) override {
    v8_inspector__V8Inspector__Channel__BASE__sendNotification(
        *this, message.release());
  }
  void flushProtocolNotifications() override {
    v8_inspector__V8Inspector__Channel__BASE__flushProtocolNotifications(*this);
  }
};

extern "C" {
void v8_inspector__V8Inspector__Channel__BASE__CONSTRUCT(
    uninit_t<v8_inspector__V8Inspector__Channel__BASE>& buf) {
  construct_in_place<v8_inspector__V8Inspector__Channel__BASE>(buf);
}

void v8_inspector__V8Inspector__Channel__sendResponse(
    v8_inspector::V8Inspector::Channel& self, int callId,
    v8_inspector::StringBuffer* message) {
  self.sendResponse(
      callId,
      static_cast<std::unique_ptr<v8_inspector::StringBuffer>>(message));
}
void v8_inspector__V8Inspector__Channel__sendNotification(
    v8_inspector::V8Inspector::Channel& self,
    v8_inspector::StringBuffer* message) {
  self.sendNotification(
      static_cast<std::unique_ptr<v8_inspector::StringBuffer>>(message));
}
void v8_inspector__V8Inspector__Channel__flushProtocolNotifications(
    v8_inspector::V8Inspector::Channel& self) {
  self.flushProtocolNotifications();
}

void v8_inspector__V8InspectorClient__BASE__runMessageLoopOnPause(
    v8_inspector::V8InspectorClient& self, int contextGroupId);
void v8_inspector__V8InspectorClient__BASE__quitMessageLoopOnPause(
    v8_inspector::V8InspectorClient& self);
void v8_inspector__V8InspectorClient__BASE__runIfWaitingForDebugger(
    v8_inspector::V8InspectorClient& self, int contextGroupId);
}  // extern "C"

struct v8_inspector__V8InspectorClient__BASE
    : public v8_inspector::V8InspectorClient {
  using v8_inspector::V8InspectorClient::V8InspectorClient;

  void runMessageLoopOnPause(int contextGroupId) override {
    v8_inspector__V8InspectorClient__BASE__runMessageLoopOnPause(
        *this, contextGroupId);
  }
  void quitMessageLoopOnPause() override {
    v8_inspector__V8InspectorClient__BASE__quitMessageLoopOnPause(*this);
  }
  void runIfWaitingForDebugger(int contextGroupId) override {
    v8_inspector__V8InspectorClient__BASE__runIfWaitingForDebugger(
        *this, contextGroupId);
  }
};

extern "C" {
void v8_inspector__V8InspectorClient__BASE__CONSTRUCT(
    uninit_t<v8_inspector__V8InspectorClient__BASE>& buf) {
  construct_in_place<v8_inspector__V8InspectorClient__BASE>(buf);
}

void v8_inspector__V8InspectorClient__runMessageLoopOnPause(
    v8_inspector::V8InspectorClient& self, int contextGroupId) {
  self.runMessageLoopOnPause(contextGroupId);
}
void v8_inspector__V8InspectorClient__quitMessageLoopOnPause(
    v8_inspector::V8InspectorClient& self) {
  self.quitMessageLoopOnPause();
}
void v8_inspector__V8InspectorClient__runIfWaitingForDebugger(
    v8_inspector::V8InspectorClient& self, int contextGroupId) {
  self.runIfWaitingForDebugger(contextGroupId);
}

void v8_inspector__StringBuffer__DELETE(v8_inspector::StringBuffer& self) {
  delete &self;
}

const v8_inspector::StringView* v8_inspector__StringBuffer__string(
    v8_inspector::StringBuffer& self) {
  return &self.string();
}

v8_inspector::StringBuffer* v8_inspector__StringBuffer__create(
    const v8_inspector::StringView& source) {
  return v8_inspector::StringBuffer::create(source).release();
}

int v8__Location__GetLineNumber(v8::Location& self) {
  return self.GetLineNumber();
}

int v8__Location__GetColumnNumber(v8::Location& self) {
  return self.GetColumnNumber();
}

v8::Module::Status v8__Module__GetStatus(const v8::Module& self) {
  return self.GetStatus();
}

v8::Value* v8__Module__GetException(const v8::Module& self) {
  return local_to_ptr(self.GetException());
}

int v8__Module__GetModuleRequestsLength(const v8::Module& self) {
  return self.GetModuleRequestsLength();
}

v8::String* v8__Module__GetModuleRequest(const v8::Module& self, int i) {
  return local_to_ptr(self.GetModuleRequest(i));
}

void v8__Module__GetModuleRequestLocation(const v8::Module& self, int i,
                                          v8::Location* out) {
  *out = self.GetModuleRequestLocation(i);
}

int v8__Module__GetIdentityHash(const v8::Module& self) {
  return self.GetIdentityHash();
}

// This is an extern C calling convention compatible version of
// v8::Module::ResolveCallback.
typedef v8::Module* (*v8__Module__ResolveCallback)(
    v8::Local<v8::Context> context, v8::Local<v8::String> specifier,
    v8::Local<v8::Module> referrer);

MaybeBool v8__Module__InstantiateModule(v8::Module& self,
                                        v8::Local<v8::Context> context,
                                        v8__Module__ResolveCallback c_cb) {
  static v8__Module__ResolveCallback static_cb = nullptr;
  assert(static_cb == nullptr);
  static_cb = c_cb;
  auto cxx_cb = [](v8::Local<v8::Context> context,
                   v8::Local<v8::String> specifier,
                   v8::Local<v8::Module> referrer) {
    v8::Module* m = static_cb(context, specifier, referrer);
    if (m == nullptr) {
      return v8::MaybeLocal<v8::Module>();
    } else {
      return v8::MaybeLocal<v8::Module>(ptr_to_local(m));
    }
  };

  auto r = maybe_to_maybe_bool(self.InstantiateModule(context, cxx_cb));
  static_cb = nullptr;
  return r;
}

v8::Value* v8__Module__Evaluate(v8::Module& self,
                                v8::Local<v8::Context> context) {
  return maybe_local_to_ptr(self.Evaluate(context));
}

}  // extern "C"