// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_ENGINE_H_
#define FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_ENGINE_H_

#include <memory>
#include <unordered_map>

#include "flutter/fml/macros.h"
#include "flutter/shell/common/shell.h"
#include "flutter/shell/common/thread_host.h"
#include "flutter/shell/platform/embedder/embedder.h"
#include "flutter/shell/platform/embedder/embedder_engine.h"
#include "flutter/shell/platform/embedder/embedder_external_texture_gl.h"
#include "flutter/shell/platform/embedder/embedder_thread_host.h"

namespace flutter {

// The object that is returned to the embedder as an opaque pointer to the
// instance of the Flutter engine.
class EmbedderEngine {
 public:
  using IdleCallback = std::function<void(int64_t)>;

  EmbedderEngine(std::unique_ptr<EmbedderThreadHost> thread_host,
                 flutter::TaskRunners task_runners,
                 flutter::Settings settings,
                 Shell::CreateCallback<PlatformView> on_create_platform_view,
                 Shell::CreateCallback<Rasterizer> on_create_rasterizer,
                 EmbedderExternalTextureGL::ExternalTextureCallback
                     external_texture_callback);

  ~EmbedderEngine();

  const TaskRunners& GetTaskRunners() const;

  bool NotifyCreated();

  bool NotifyDestroyed();

  bool Run(RunConfiguration run_configuration);

  bool IsValid() const;

  bool SetIdleNotificationCallback(const IdleCallback& idle_notification_callback);

  bool SetViewportMetrics(flutter::ViewportMetrics metrics);

  bool DispatchPointerDataPacket(
      std::unique_ptr<flutter::PointerDataPacket> packet);

  bool SendPlatformMessage(fml::RefPtr<flutter::PlatformMessage> message);

  bool RegisterTexture(int64_t texture);

  bool UnregisterTexture(int64_t texture);

  bool MarkTextureFrameAvailable(int64_t texture);

  bool OnVsyncEvent(intptr_t baton,
                    fml::TimePoint frame_start_time,
                    fml::TimePoint frame_target_time);

  bool PostRenderThreadTask(fml::closure task);

  bool RunTask(const FlutterTask* task);

 private:
  const std::unique_ptr<EmbedderThreadHost> thread_host_;
  TaskRunners task_runners_;
  std::unique_ptr<Shell> shell_;
  const EmbedderExternalTextureGL::ExternalTextureCallback
      external_texture_callback_;
  bool is_valid_ = false;

  FML_DISALLOW_COPY_AND_ASSIGN(EmbedderEngine);
};

}  // namespace flutter

#endif  // FLUTTER_SHELL_PLATFORM_EMBEDDER_EMBEDDER_ENGINE_H_