#include <cstring>
#include <renderer/rhi/opengl/gl_context.h>
#include <renderer/rhi/opengl/gl_framebuffer.h>
#include <utils/logger.h>

namespace extra2d {

GLContext::GLContext(GLDevice *device)
    : device_(device), defaultFramebuffer_(nullptr) {}

GLContext::~GLContext() = default;

bool GLContext::initialize() {
  E2D_LOG_INFO("Initializing OpenGL context...");

  // 创建默认帧缓冲（窗口帧缓冲）
  defaultFramebuffer_ = std::make_unique<GLFramebuffer>();
  defaultFramebuffer_->setSize(800, 600); // 默认大小，会被更新

  E2D_LOG_INFO("OpenGL context initialized");
  return true;
}

void GLContext::shutdown() {
  E2D_LOG_INFO("Shutting down OpenGL context...");

  defaultFramebuffer_.reset();

  E2D_LOG_INFO("OpenGL context shutdown complete");
}

void GLContext::beginFrame() {
  // 重置每帧的统计
  // device_->resetStats(); // 需要在 GLDevice 中添加此方法
}

void GLContext::endFrame() {
  // 交换缓冲区
  // 通过 SDL 获取当前窗口并交换缓冲区
  SDL_Window* window = SDL_GL_GetCurrentWindow();
  if (window) {
    SDL_GL_SwapWindow(window);
  }
}

void GLContext::setViewport(int32_t x, int32_t y, uint32_t width,
                            uint32_t height) {
  glViewport(x, y, static_cast<GLsizei>(width), static_cast<GLsizei>(height));

  // 更新默认帧缓冲大小
  if (defaultFramebuffer_) {
    defaultFramebuffer_->setSize(width, height);
  }
}

void GLContext::bindDefaultFramebuffer() {
  glBindFramebuffer(GL_FRAMEBUFFER, 0);
}

RHIFramebuffer *GLContext::getDefaultFramebuffer() {
  return defaultFramebuffer_.get();
}

bool GLContext::isFeatureSupported(const char *feature) const {
  // 检查 OpenGL 扩展或版本
  if (std::strcmp(feature, "instancing") == 0) {
    return glad_glDrawArraysInstanced != nullptr;
  }
  if (std::strcmp(feature, "compute") == 0) {
    return glad_glDispatchCompute != nullptr;
  }
  if (std::strcmp(feature, "sRGB") == 0) {
    return GLAD_GL_EXT_texture_sRGB_R8;
  }
  if (std::strcmp(feature, "anisotropic") == 0) {
    return GLAD_GL_EXT_texture_filter_anisotropic;
  }
  if (std::strcmp(feature, "debug") == 0) {
    return GLAD_GL_KHR_debug;
  }
  return false;
}

} // namespace extra2d