// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

#ifndef EMBEDDERS_OPENGLUI_COMMON_VM_GLUE_H_
#define EMBEDDERS_OPENGLUI_COMMON_VM_GLUE_H_

#include <stdlib.h>

#include "embedders/openglui/common/events.h"
#include "embedders/openglui/common/isized.h"
#include "include/dart_api.h"

class VMGlue {
 public:
  explicit VMGlue(ISized* surface,
                  const char* script_path,
                  const char* extension_script = NULL,
                  const char* main_script = NULL,
                  int setup_flag = 0);
  ~VMGlue() {
    delete[] main_script_;
    delete[] extension_script_;
  }

  int InitializeVM();
  int StartMainIsolate();
  int CallSetup(bool force = false);
  int CallUpdate();
  int CallShutdown();
  int OnMotionEvent(const char* funtion, int64_t when,
                    float move_x, float move_y);
  int OnKeyEvent(const char* funtion, int64_t when, int32_t key_code,
                 bool isAltKeyDown, bool isCtrlKeyDown, bool isShiftKeyDown,
                 int32_t repeat);
  inline void OnAccelerometerEvent(float x, float y, float z) {
    if (x != x_ || y != y_ || z != z_) {
      x_ = x;
      y_ = y;
      z_ = z;
      accelerometer_changed_ = true;
    }
  }

  void FinishMainIsolate();

 private:
  int Invoke(const char *function, int argc, Dart_Handle* args,
             bool failIfNotDefined = true);

  static Dart_Handle CheckError(Dart_Handle);

  static Dart_Isolate CreateIsolateAndSetupHelper(const char* script_uri,
                                          const char* main,
                                          void* data,
                                          char** error);
  static Dart_Isolate CreateIsolateAndSetup(const char* script_uri,
                                    const char* main,
                                    void* data, char** error);
  static Dart_Handle LibraryTagHandler(Dart_LibraryTag tag,
                                       Dart_Handle library,
                                       Dart_Handle urlHandle);
  static Dart_Handle LoadSourceFromFile(const char* url);
  static void ShutdownIsolate(void* callback_data);

  static bool initialized_vm_;
  static char* extension_script_;
  ISized* surface_;
  Dart_Isolate isolate_;
  bool initialized_script_;
  char* main_script_;
  float x_, y_, z_;  // Last values from accelerometer.
  bool accelerometer_changed_;
  int setup_flag_;
};

#endif  // EMBEDDERS_OPENGLUI_COMMON_VM_GLUE_H_