#pragma once

#include <stdint.h>
#include <stdarg.h>

#include "UnityForwardDecls.h"
#include "UnityRendering.h"

// unity plugin functions

// audio plugin api
typedef int     (*UnityPluginGetAudioEffectDefinitionsFunc)(struct UnityAudioEffectDefinition*** descptr);

// OLD rendering plugin api (will become obsolete soon)
typedef void    (*UnityPluginSetGraphicsDeviceFunc)(void* device, int deviceType, int eventType);
typedef void    (*UnityPluginRenderMarkerFunc)(int marker);

// new rendering plugin api
typedef void    (*UnityPluginLoadFunc)(struct IUnityInterfaces* unityInterfaces);
typedef void    (*UnityPluginUnloadFunc)();


// log handler function
#ifdef __cplusplus
typedef bool (*LogEntryHandler)(LogType logType, const char* log, va_list list);
#endif

//
// these are functions referenced in trampoline and implemented in unity player lib
//

#ifdef __cplusplus
extern "C" {
#endif

// life cycle management

void    UnityInitStartupTime();
void    UnityInitRuntime(int argc, char* argv[]);
void    UnityInitApplicationNoGraphics(const char* appPathName);
void    UnityInitApplicationGraphics();
void    UnityCleanup();
void    UnityLoadApplication();
void    UnityPlayerLoop();                  // normal player loop
void    UnityBatchPlayerLoop();             // batch mode like player loop, without rendering (usable for background processing)
void    UnitySetPlayerFocus(int focused);   // send OnApplicationFocus() message to scripts
void    UnityLowMemory();
void    UnityPause(int pause);
int     UnityIsPaused();                    // 0 if player is running, 1 if paused
void    UnityWillPause();                   // send the message that app will pause
void    UnityWillResume();                  // send the message that app will resume
void    UnityInputProcess();
void    UnityDeliverUIEvents();             // unity processing impacting UI will be called in there


// rendering

int     UnityGetRenderingAPIs(int capacity, int* outAPIs);
void    UnityFinishRendering();

// OpenGL ES.

int     UnityHasRenderingAPIExtension(const char* extension);
void    UnityOnSetCurrentGLContext(EAGLContext* context);

// This must match the one in ApiEnumsGLES.h
typedef enum UnityFramebufferTarget
{
    kDrawFramebuffer = 0,
    kReadFramebuffer,
    kFramebufferTargetCount
} UnityFramebufferTarget;
void    UnityBindFramebuffer(UnityFramebufferTarget target, int fbo);
void    UnityRegisterFBO(UnityRenderBufferHandle color, UnityRenderBufferHandle depth, unsigned fbo);

// when texture (managed in trampoline) is used in unity (e.g. with external render surfaces)
// we need to poke unity when we delete it (so it could clear caches etc)
void    UnityOnDeleteGLTexture(int tex);

// controling player internals

// TODO: needs some cleanup
void    UnitySetAudioSessionActive(int active);
void    UnityGLInvalidateState();
void    UnityReloadResources();
int     UnityIsCaptureScreenshotRequested();
void    UnityCaptureScreenshot();
void    UnitySendMessage(const char* obj, const char* method, const char* msg);

EAGLContext*        UnityGetDataContextGLES();

#ifdef __cplusplus
void    UnitySetLogEntryHandler(LogEntryHandler newHandler);
#endif


// plugins support

// WARNING: old UnityRegisterRenderingPlugin will become obsolete soon
void    UnityRegisterRenderingPlugin(UnityPluginSetGraphicsDeviceFunc setDevice, UnityPluginRenderMarkerFunc renderMarker);

void    UnityRegisterRenderingPluginV5(UnityPluginLoadFunc loadPlugin, UnityPluginUnloadFunc unloadPlugin);
void    UnityRegisterAudioPlugin(UnityPluginGetAudioEffectDefinitionsFunc getAudioEffectDefinitions);


// resolution/orientation handling

void    UnityGetRenderingResolution(unsigned* w, unsigned* h);
void    UnityGetSystemResolution(unsigned* w, unsigned* h);

void    UnityRequestRenderingResolution(unsigned w, unsigned h);

int     UnityIsOrientationEnabled(unsigned /*ScreenOrientation*/ orientation);

int     UnityHasOrientationRequest();
int     UnityShouldAutorotate();
int     UnityRequestedScreenOrientation(); // returns ScreenOrientation
void    UnityOrientationRequestWasCommitted();

int     UnityReportResizeView(unsigned w, unsigned h, unsigned /*ScreenOrientation*/ contentOrientation);   // returns ScreenOrientation
void    UnityReportSafeAreaChange(float x, float y, float w, float h);
void    UnityReportBackbufferChange(UnityRenderBufferHandle colorBB, UnityRenderBufferHandle depthBB);
float   UnityCalculateScalingFactorFromTargetDPI(UIScreen* screen);

// player settings

int     UnityDisableDepthAndStencilBuffers();
int     UnityUseAnimatedAutorotation();
int     UnityGetDesiredMSAASampleCount(int defaultSampleCount);
int     UnityGetSRGBRequested();
int     UnityGetWideColorRequested();
int     UnityGetShowActivityIndicatorOnLoading();
int     UnityGetAccelerometerFrequency();
int     UnityGetTargetFPS();
int     UnityGetUseCustomAppBackgroundBehavior();
int     UnityGetDeferSystemGesturesTopEdge();
int     UnityGetDeferSystemGesturesBottomEdge();
int     UnityGetDeferSystemGesturesLeftEdge();
int     UnityGetDeferSystemGesturesRightEdge();
int     UnityGetHideHomeButton();
int     UnityMetalFramebufferOnly();


// push notifications
#if !PLATFORM_TVOS
void    UnitySendLocalNotification(UILocalNotification* notification);
#endif
void    UnitySendRemoteNotification(NSDictionary* notification);
void    UnitySendDeviceToken(NSData* deviceToken);
void    UnitySendRemoteNotificationError(NSError* error);

// native events

void    UnityInvalidateDisplayDataCache(void* screen);
void    UnityUpdateDisplayList(void** screens, int screenCount);


// profiler

void*   UnityCreateProfilerCounter(const char*);
void    UnityDestroyProfilerCounter(void*);
void    UnityStartProfilerCounter(void*);
void    UnityEndProfilerCounter(void*);


// sensors

void    UnitySensorsSetGyroRotationRate(int idx, float x, float y, float z);
void    UnitySensorsSetGyroRotationRateUnbiased(int idx, float x, float y, float z);
void    UnitySensorsSetGravity(int idx, float x, float y, float z);
void    UnitySensorsSetUserAcceleration(int idx, float x, float y, float z);
void    UnitySensorsSetAttitude(int idx, float x, float y, float z, float w);
void    UnityDidAccelerate(float x, float y, float z, double timestamp);
void    UnitySetJoystickPosition(int joyNum, int axis, float pos);
int     UnityStringToKey(const char *name);
void    UnitySetKeyState(int key, int /*bool*/ state);

// WWW connection handling

void    UnityReportWWWStatus(void* udata, int status);
void    UnityReportWWWNetworkError(void* udata, int status);
void    UnityReportWWWResponseHeader(void* udata, const char* headerName, const char* headerValue);
void    UnityReportWWWReceivedResponse(void* udata, unsigned expectedDataLength);
void    UnityReportWWWReceivedData(void* udata, const void* buffer, unsigned totalRead, unsigned expectedTotal);
void    UnityReportWWWFinishedLoadingData(void* udata);
void    UnityReportWWWSentData(void* udata, unsigned totalWritten, unsigned expectedTotal);
const void*   UnityWWWGetUploadData(void* udata, unsigned* bufferSize);
void    UnityWWWConsumeUploadData(void* udata, unsigned consumedSize);

// AVCapture

void    UnityReportAVCapturePermission();
void    UnityDidCaptureVideoFrame(intptr_t tex, void* udata);

// logging override

#ifdef __cplusplus
} // extern "C"
#endif


// touches processing

#ifdef __cplusplus
extern "C" {
#endif

void    UnitySetViewTouchProcessing(UIView* view, int /*ViewTouchProcessing*/ processingPolicy);
void    UnityDropViewTouchProcessing(UIView* view);

void    UnitySendTouchesBegin(NSSet* touches, UIEvent* event);
void    UnitySendTouchesEnded(NSSet* touches, UIEvent* event);
void    UnitySendTouchesCancelled(NSSet* touches, UIEvent* event);
void    UnitySendTouchesMoved(NSSet* touches, UIEvent* event);

void    UnityCancelTouches();

#ifdef __cplusplus
} // extern "C"
#endif


//
// these are functions referenced and implemented in trampoline
//

#ifdef __cplusplus
extern "C" {
#endif

// UnityAppController.mm
UIViewController*       UnityGetGLViewController();
UIView*                 UnityGetGLView();
UIWindow*               UnityGetMainWindow();
enum ScreenOrientation  UnityCurrentOrientation();

// Unity/DisplayManager.mm
float                   UnityScreenScaleFactor(UIScreen* screen);

#ifdef __cplusplus
} // extern "C"
#endif


//
// these are functions referenced in unity player lib and implemented in trampoline
//

#ifdef __cplusplus
extern "C" {
#endif

// iPhone_Sensors.mm
void            UnityInitJoysticks();
void            UnityCoreMotionStart();
void            UnityCoreMotionStop();
int             UnityIsGyroEnabled(int idx);
int             UnityIsGyroAvailable();
void            UnityUpdateGyroData();
void            UnitySetGyroUpdateInterval(int idx, float interval);
float           UnityGetGyroUpdateInterval(int idx);
void            UnityUpdateJoystickData();
int             UnityGetJoystickCount();
void            UnityGetJoystickName(int idx, char* buffer, int maxLen);
void            UnityGetJoystickAxisName(int idx, int axis, char* buffer, int maxLen);
void            UnityGetNiceKeyname(int key, char* buffer, int maxLen);

// UnityAppController+Rendering.mm
void            UnityInitMainScreenRenderingCallback();
void            UnityGfxInitedCallback();
void            UnityPresentContextCallback(struct UnityFrameStats const* frameStats);
void            UnityFramerateChangeCallback(int targetFPS);
int             UnitySelectedRenderingAPI();

NSBundle*           UnityGetMetalBundle();
MTLDeviceRef        UnityGetMetalDevice();
MTLCommandQueueRef  UnityGetMetalCommandQueue();
MTLCommandQueueRef  UnityGetMetalDrawableCommandQueue();

EAGLContext*        UnityGetDataContextEAGL();

UnityRenderBufferHandle UnityBackbufferColor();
UnityRenderBufferHandle UnityBackbufferDepth();

int             UnityGetWideColorSupported();

// UI/ActivityIndicator.mm
void            UnityStartActivityIndicator();
void            UnityStopActivityIndicator();

// UI/Keyboard.mm
void            UnityKeyboard_Create(unsigned keyboardType, int autocorrection, int multiline, int secure, int alert, const char* text, const char* placeholder);
void            UnityKeyboard_Show();
void            UnityKeyboard_Hide();
void            UnityKeyboard_GetRect(float* x, float* y, float* w, float* h);
void            UnityKeyboard_SetText(const char* text);
NSString*       UnityKeyboard_GetText();
int             UnityKeyboard_IsActive();
int             UnityKeyboard_IsDone();
int             UnityKeyboard_WasCanceled();
int             UnityKeyboard_Status();
void            UnityKeyboard_SetInputHidden(int hidden);
int             UnityKeyboard_IsInputHidden();

int             UnityKeyboard_CanGetSelection();
void            UnityKeyboard_GetSelection(int* location, int* range);

// UI/UnityViewControllerBase.mm
void            UnityNotifyAutoOrientationChange();
void            UnityNotifyHideHomeButtonChange();
void            UnityNotifyDeferSystemGesturesChange();


// Unity/AVCapture.mm
int             UnityGetAVCapturePermission(int captureTypes);
void            UnityRequestAVCapturePermission(int captureTypes);

// Unity/CameraCapture.mm
void            UnityEnumVideoCaptureDevices(void* udata, void(*callback)(void* udata, const char* name, int frontFacing));
void*           UnityInitCameraCapture(int device, int w, int h, int fps, void* udata);
void            UnityStartCameraCapture(void* capture);
void            UnityPauseCameraCapture(void* capture);
void            UnityStopCameraCapture(void* capture);
void            UnityCameraCaptureExtents(void* capture, int* w, int* h);
void            UnityCameraCaptureReadToMemory(void* capture, void* dst, int w, int h);
int             UnityCameraCaptureVideoRotationDeg(void* capture);
int             UnityCameraCaptureVerticallyMirrored(void* capture);


// Unity/DeviceSettings.mm
const char*     UnityDeviceUniqueIdentifier();
const char*     UnityVendorIdentifier();
const char*     UnityAdvertisingIdentifier();
int             UnityAdvertisingTrackingEnabled();
const char*     UnityDeviceName();
const char*     UnitySystemName();
const char*     UnitySystemVersion();
const char*     UnityDeviceModel();
int             UnityDeviceCPUCount();
int             UnityGetPhysicalMemory();
int             UnityDeviceGeneration();
float           UnityDeviceDPI();
const char*     UnitySystemLanguage();
int             UnityDeviceSupportsUpsideDown();

// Unity/DisplayManager.mm
EAGLContext*    UnityGetMainScreenContextGLES();
EAGLContext*    UnityGetContextEAGL();
void            UnityStartFrameRendering();
void            UnityDestroyUnityRenderSurfaces();
int             UnityMainScreenRefreshRate();

// Unity/Filesystem.mm
const char*     UnityApplicationDir();
const char*     UnityDocumentsDir();
const char*     UnityLibraryDir();
const char*     UnityCachesDir();
int             UnityUpdateNoBackupFlag(const char* path, int setFlag); // Returns 1 if successful, otherwise 0

// Unity/MetalHelper.mm
void                UnityAddNewMetalAPIImplIfNeeded(MTLDeviceRef device);

// Unity/WWWConnection.mm
void*           UnityStartWWWConnectionGet(void* udata, const void* headerDict, const char* url);
void*           UnityStartWWWConnectionPost(void* udata, const void* headerDict, const char* url, const void* data, unsigned length);
void            UnityDestroyWWWConnection(void* connection);
void            UnityShouldCancelWWW(const void* connection);

// Unity/FullScreenVideoPlayer.mm
int             UnityIsFullScreenPlaying();
void            TryResumeFullScreenVideo();

//Apple TV Remote
int         UnityGetAppleTVRemoteAllowExitToMenu();
void        UnitySetAppleTVRemoteAllowExitToMenu(int val);
int         UnityGetAppleTVRemoteAllowRotation();
void        UnitySetAppleTVRemoteAllowRotation(int val);
int         UnityGetAppleTVRemoteReportAbsoluteDpadValues();
void        UnitySetAppleTVRemoteReportAbsoluteDpadValues(int val);
int         UnityGetAppleTVRemoteTouchesEnabled();
void        UnitySetAppleTVRemoteTouchesEnabled(int val);

#ifdef __cplusplus
} // extern "C"
#endif


#ifdef __OBJC__
// This is basically a wrapper for [NSString UTF8String] with additional strdup.
//
// Apparently multiple calls on UTF8String will leak memory (NSData objects) that are collected
// only when @autoreleasepool is exited. This function serves as documentation for this and as a
// handy wrapper.
inline char* AllocCString(NSString* value)
{
    if (value == nil)
        return 0;

    const char* str = [value UTF8String];
    return str ? strdup(str) : 0;
}

#endif