/*
 * Copyright 2020 Toyota Connected North America
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <memory>
#include <vector>

#include <EGL/egl.h>

#include <GLES2/gl2.h>
#include <flutter/encodable_value.h>
#include <shell/platform/embedder/embedder.h>
#include "constants.h"

class Engine;

typedef flutter::EncodableValue (*EncodableValueCallback)(
    void* /* user data */,
    const std::map<flutter::EncodableValue, flutter::EncodableValue>* args);

typedef void (*TextureCallback)(void* /* user data */,
                                GLuint /* texture name */);

class Texture {
 public:
  Texture(uint32_t id,
          uint32_t target,
          uint32_t format,
          EncodableValueCallback create_callback,
          TextureCallback dispose_callback,
          int width = 0,
          int height = 0);

  ~Texture();

  Texture(const Texture&) = delete;

  const Texture& operator=(const Texture&) = delete;

  /**
   * @brief Set Engine
   * @param[in] engine Engine
   * @return void
   * @relation
   * wayland, flutter
   */
  void SetEngine(Engine* engine);

  /**
   * @brief Get flutter OpenGL texture
   * @param[in,out] texture_out Pointer to FlutterOpenGLTexture
   * @return void
   * @relation
   * wayland, flutter
   */
  void GetFlutterOpenGLTexture(FlutterOpenGLTexture* texture_out);

  /**
   * @brief Get flutter OpenGL texture
   * @param[in] width Width
   * @param[in] height Height
   * @param[in] args from Dart
   * @return flutter::EncodableValue
   * @retval Callback to m_create_callback
   * @retval Error callback is not set
   * @relation
   * wayland, flutter
   */
  flutter::EncodableValue Create(
      int width,
      int height,
      const std::map<flutter::EncodableValue, flutter::EncodableValue>* args);

  /**
   * @brief Dispose
   * @param[in] name Texture id
   * @return void
   * @relation
   * wayland, flutter
   */
  void Dispose(uint32_t name);

  /**
   * @brief Add again for assigned EGL texture id
   * @param[in] name Texture id
   * @return void
   * @relation
   * wayland, flutter
   */
  void Enable(uint32_t name);

  /**
   * @brief Disable assigned EGL texture id
   * @param[in] name Texture id
   * @return void
   * @relation
   * wayland, flutter
   */
  MAYBE_UNUSED void Disable(GLuint name);

  /**
   * @brief Ready that a new texture frame is available for a given texture id
   * @return void
   * @relation
   * wayland, flutter
   */
  void FrameReady() const;

  /**
   * @brief Get texture id
   * @return int64_t
   * @retval Texture id
   * @relation
   * wayland, flutter
   */
  NODISCARD int64_t GetId() const { return m_id; }

 protected:
  Engine* m_flutter_engine;
  bool m_enabled;
  int64_t m_id;
  std::vector<int64_t> m_name;
  uint32_t m_target;
  uint32_t m_format;
  MAYBE_UNUSED int m_width;
  int m_height;

  MAYBE_UNUSED EGLSurface m_surface{};

  volatile bool m_draw_next;

 private:
  const EncodableValueCallback m_create_callback;
  const TextureCallback m_dispose_callback;
};