#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"

// TODO(ry) do not use "using namespace" so the binding code is more explicit.
using namespace v8;
using namespace support;

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

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

extern "C" {

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

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

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

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

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

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

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

void v8__Isolate__Dispose(Isolate &isolate) {
  auto allocator = isolate.GetArrayBufferAllocator();
  isolate.Dispose();
  delete allocator;
}

void v8__Isolate__Enter(Isolate &isolate) { isolate.Enter(); }

void v8__Isolate__Exit(Isolate &isolate) { isolate.Exit(); }

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

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

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

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

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

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

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

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

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

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

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));
}

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

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

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

int v8__String__WriteUtf8(const String &self, 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,
                            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));
}

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

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

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

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

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

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

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

Context *v8__Context__New(Isolate *isolate) {
  // TODO: optional arguments.
  return *Context::New(isolate);
}

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

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

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

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

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

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(
    v8::FunctionCallbackInfo<v8::Value> *self) {
  return self->Length();
}

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

v8::ReturnValue<v8::Value> *v8__FunctionCallbackInfo__GetReturnValue(
    v8::FunctionCallbackInfo<v8::Value> *self) {
  v8::ReturnValue<v8::Value> *rv =
      new v8::ReturnValue<v8::Value>(self->GetReturnValue());
  return rv;
}

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

v8::Value *v8__ReturnValue__Get(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();
}

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

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

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

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

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

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::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(Task &self);
void v8__Task__BASE__Run(Task &self);

struct v8__Task__BASE : public Task {
  using Task::Task;
  void operator delete(void *ptr) noexcept {
    v8__Task__BASE__DELETE(*reinterpret_cast<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(Task &self) { delete &self; }
void v8__Task__Run(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();
}
} // extern "C"