#ifndef AURORA_AURORA_H
#define AURORA_AURORA_H

#ifdef __cplusplus
#include <cstddef>
#include <cstdint>

extern "C" {
#else
#include "stdbool.h"
#include "stddef.h"
#include "stdint.h"
#endif

typedef enum {
  BACKEND_AUTO,
  BACKEND_D3D11,
  BACKEND_D3D12,
  BACKEND_METAL,
  BACKEND_VULKAN,
  BACKEND_OPENGL,
  BACKEND_OPENGLES,
  BACKEND_WEBGPU,
  BACKEND_NULL,
} AuroraBackend;

typedef enum {
  LOG_DEBUG,
  LOG_INFO,
  LOG_WARNING,
  LOG_ERROR,
  LOG_FATAL,
} AuroraLogLevel;

typedef enum {
  AURORA_DISPLAY_MODE_WINDOWED,
  AURORA_DISPLAY_MODE_BORDERLESS,
  AURORA_DISPLAY_MODE_EXCLUSIVE,
} AuroraDisplayMode;

typedef struct {
  int32_t x;
  int32_t y;
} AuroraWindowPos;

typedef struct {
  uint32_t width;
  uint32_t height;

  /**
   * Width of the main GX framebuffer.
   */
  uint32_t fb_width;

  /**
   * Height of the main GX framebuffer.
   */
  uint32_t fb_height;

  /**
   * The size of the framebuffer used to present to the operating system.
   * May differ from fb_width if Aurora is instructed to force an aspect ratio or resolution configuration.
   */
  uint32_t native_fb_width;

  /**
   * The size of the framebuffer used to present to the operating system.
   * May differ from fb_height if Aurora is instructed to force an aspect ratio or resolution configuration.
   */
  uint32_t native_fb_height;
  float scale;
} AuroraWindowSize;

typedef struct SDL_Window SDL_Window;
typedef struct AuroraEvent AuroraEvent;

typedef void (*AuroraLogCallback)(AuroraLogLevel level, const char* module, const char* message, unsigned int len);
typedef void (*AuroraImGuiInitCallback)(const AuroraWindowSize* size);

typedef struct {
  const char* appName;
  const char* userPath;
  const char* cachePath;
  // Read-only application resources. Defaults to SDL_GetBasePath(), which is
  // where release builds place initial_pipeline_cache.db.
  const char* resourcesPath;
  AuroraBackend desiredBackend;
  uint32_t msaa;
  uint16_t maxTextureAnisotropy;
  // No vsync knob exists: the swapchain is always configured for a
  // non-blocking present mode (Immediate, else Mailbox). See best_present_mode.
  bool startFullscreen;
  bool allowJoystickBackgroundEvents;
  bool pauseOnFocusLost;
  bool allowTextureReplacements;
  bool allowTextureDumps;
  bool disableCopyFilter;
  // When false, Aurora centers the first window. When true, windowPosX/Y are restored verbatim,
  // including negative coordinates on monitors left of or above the primary display.
  bool hasWindowPosition;
  int32_t windowPosX;
  int32_t windowPosY;
  uint32_t windowWidth;
  uint32_t windowHeight;
  void* iconRGBA8;
  uint32_t iconWidth;
  uint32_t iconHeight;
  AuroraLogCallback logCallback;
  AuroraLogLevel logLevel;
  AuroraImGuiInitCallback imGuiInitCallback;

  /*
   * The size of the GameCube's main memory, or MEM1 on the Wii.
   * Note that it will not be allocated at the exact 0x80000000 address, as that cannot be guaranteed.
   * This can be set to 0 to disable allocating this region.
   */
  uint32_t mem1Size;

  /*
   * The size of the GameCube's ARAM, or MEM2 on the Wii.
   * This can be set to 0 to disable allocating this region.
   */
  uint32_t mem2Size;

  // Optional directory for the portable GX pipeline database. When null, the
  // database is stored in cachePath with Dawn's machine-specific cache.
  const char* pipelineCachePath;
} AuroraConfig;

typedef struct {
  AuroraBackend backend;
  const char* userPath;
  const char* cachePath;
  SDL_Window* window;
  AuroraWindowSize windowSize;
} AuroraInfo;

AuroraInfo aurora_initialize(int argc, char* argv[], const AuroraConfig* config);
void aurora_shutdown();
const AuroraEvent* aurora_update();
bool aurora_begin_frame();
void aurora_end_frame();
typedef void (*AuroraFrameWorkerWaitCallback)();
// Called from the producer thread at bounded intervals while Aurora waits for
// the asynchronous frame worker. The callback must not enter Aurora.
void aurora_set_frame_worker_wait_callback(AuroraFrameWorkerWaitCallback callback);
void aurora_wait_for_frame_worker();
bool aurora_wait_for_frame_worker_for(uint32_t timeoutMicros);
// Absolute schedule for the next sealed frame, on steady_clock: baseNanos anchors the group and
// intervalNanos is the period, so slot k of N+1 fires at base + k*interval/(N+1). Zeros clear it.
void aurora_set_present_schedule(uint64_t baseNanos, uint64_t intervalNanos);
// Reports whether the frame about to be sealed met its display boundary. Interpolation sizes its
// slot group from this, backing off after misses. Only paced presents may report.
void aurora_report_producer_paced(bool paced);
void aurora_request_frame_capture(uint32_t frame, const char* outputPath);
bool aurora_flush_efb_copies_to_ram();
bool aurora_flush_efb_copy_to_ram(void* dest);

void aurora_set_log_level(AuroraLogLevel level);
void aurora_set_pause_on_focus_lost(bool value);
void aurora_set_background_input(bool value);
void aurora_set_display_mode(AuroraDisplayMode mode);
AuroraDisplayMode aurora_get_display_mode();

AuroraBackend aurora_get_backend();
const AuroraBackend* aurora_get_available_backends(size_t* count);

#ifdef __cplusplus
}
#endif

#endif