// This file is part of the 64k demo project.
// It provides shared WebGPU initialization for GPU tests.
// Eliminates boilerplate and enables graceful skipping if GPU unavailable.

#pragma once

#include "gpu/gpu.h"
#include "platform/platform.h"

// Shared test fixture for WebGPU tests
// Handles device/queue initialization and cleanup
class WebGPUTestFixture {
 public:
  WebGPUTestFixture();
  ~WebGPUTestFixture();

  // Initialize WebGPU device and queue
  // Returns true on success, false if GPU unavailable (test should skip)
  bool init();

  // Cleanup resources
  void shutdown();

  // Accessors
  WGPUInstance instance() const { return instance_; }
  WGPUDevice device() const { return device_; }
  WGPUQueue queue() const { return queue_; }
  WGPUTextureFormat format() const { return WGPUTextureFormat_BGRA8Unorm; }
  GpuContext ctx() const { return {device_, queue_, format()}; }

  // Check if fixture is ready
  bool is_initialized() const { return device_ != nullptr; }

 private:
  WGPUInstance instance_ = nullptr;
  WGPUAdapter adapter_ = nullptr;
  WGPUDevice device_ = nullptr;
  WGPUQueue queue_ = nullptr;

  // Callback state for async device request
  struct RequestState {
    WGPUAdapter adapter = nullptr;
    WGPUDevice device = nullptr;
    bool done = false;
  };

  static void adapter_callback(WGPURequestAdapterStatus status,
                                WGPUAdapter adapter,
                                const char* message,
                                void* userdata);

  static void device_callback(WGPURequestDeviceStatus status,
                              WGPUDevice device,
                              const char* message,
                              void* userdata);
};