#pragma once

#include "GlesHelper.h"

@class EAGLContext;
@class UnityView;

typedef struct RenderingSurfaceParams
{
    // rendering setup
    int msaaSampleCount;
    int renderW;
    int renderH;
    int srgb;
    int wideColor;
    int metalFramebufferOnly;

    // unity setup
    int disableDepthAndStencil;
    int useCVTextureCache;
} RenderingSurfaceParams;


@interface DisplayConnection : NSObject
- (id)init:(UIScreen*)targetScreen;
- (void)dealloc;

- (void)createView:(BOOL)useForRendering showRightAway:(BOOL)showRightAway;
- (void)createView:(BOOL)useForRendering;
- (void)createWithWindow:(UIWindow*)window andView:(UIView*)view;
- (void)initRendering;
- (void)recreateSurface:(RenderingSurfaceParams)params;

- (void)shouldShowWindow:(BOOL)show;
- (void)requestRenderingResolution:(CGSize)res;
- (void)present;

@property (readonly, copy, nonatomic)   UIScreen*               screen;
@property (readonly, copy, nonatomic)   UIWindow*               window;
@property (readonly, copy, nonatomic)   UIView*                 view;


@property (readonly, nonatomic)         CGSize                      screenSize;
@property (readonly, nonatomic)         UnityDisplaySurfaceBase*    surface;

@end


@interface DisplayManager : NSObject
- (id)objectForKeyedSubscript:(id)key;
- (BOOL)displayAvailable:(UIScreen*)targetScreen;
- (void)updateDisplayListCacheInUnity;

- (void)startFrameRendering;
- (void)present;
- (void)endFrameRendering;

- (void)enumerateDisplaysWithBlock:(void (^)(DisplayConnection* conn))block;
- (void)enumerateNonMainDisplaysWithBlock:(void (^)(DisplayConnection* conn))block;

+ (void)Initialize;
+ (DisplayManager*)Instance;

@property (readonly, nonatomic) DisplayConnection*  mainDisplay;

@property (readonly, nonatomic) NSUInteger          displayCount;

@end

inline DisplayConnection*           GetMainDisplay()
{
    return [DisplayManager Instance].mainDisplay;
}

inline UnityDisplaySurfaceBase*     GetMainDisplaySurface()
{
    return GetMainDisplay().surface;
}