#import <Foundation/Foundation.h>
#import <Cocoa/Cocoa.h>

struct MyPlugin;
void MacInputEvent(struct MyPlugin *plugin, int32_t cursorX, int32_t cursorY, int8_t button);

@interface MainView : NSView
@property (nonatomic) struct MyPlugin *plugin;
@property (nonatomic) uint32_t *bits;
@property (nonatomic) uint32_t width;
@property (nonatomic) uint32_t height;
@property (nonatomic) BOOL hasSuperView;
@end

@implementation MainView
- (void)drawRect:(NSRect)dirtyRect {
	const unsigned char *data = (const unsigned char *) _bits;
	NSDrawBitmap(self.bounds, _width, _height, 8 /* bits per channel */, 4 /* channels per pixel */, 32 /* bits per pixel */,
			4 * _width /* bytes per row */, NO /* planar */, NO /* has alpha */, 
			NSDeviceRGBColorSpace /* color space */, &data /* data */);
}

- (BOOL)acceptsFirstMouse:(NSEvent *)event {
	return YES;
}

- (void)mouseDown:(NSEvent *)event {
	NSPoint cursor = [self convertPoint:[event locationInWindow] fromView:nil];
	MacInputEvent(_plugin, cursor.x, cursor.y, 1);
}

- (void)mouseUp:(NSEvent *)event {
	NSPoint cursor = [self convertPoint:[event locationInWindow] fromView:nil];
	MacInputEvent(_plugin, cursor.x, cursor.y, -1);
}

- (void)mouseDragged:(NSEvent *)event {
	NSPoint cursor = [self convertPoint:[event locationInWindow] fromView:nil];
	MacInputEvent(_plugin, cursor.x, cursor.y, 0);
}
@end

void *MacInitialise(struct MyPlugin *plugin, uint32_t *bits, uint32_t width, uint32_t height) {
	NSRect frame;
	frame.origin.x = 0;
	frame.origin.y = 0;
	frame.size.width = width;
	frame.size.height = height;
	MainView *mainView = [[MainView alloc] initWithFrame:frame];
	mainView.plugin = plugin;
	mainView.bits = bits;
	mainView.width = width;
	mainView.height = height;
	return mainView;
}

void MacDestroy(void *mainView) {
	[((MainView *) mainView) release];
}

void MacSetParent(void *_mainView, void *_parentView) {
	MainView *mainView = (MainView *) _mainView;
	NSView *parentView = (NSView *) _parentView;
	if (mainView.hasSuperView) [mainView removeFromSuperview];
	[parentView addSubview:mainView];
	mainView.hasSuperView = true;
}

void MacSetVisible(void *_mainView, bool show) {
	MainView *mainView = (MainView *) _mainView;
	[mainView setHidden:(show ? NO : YES)];
}

void MacPaint(void *_mainView) {
	MainView *mainView = (MainView *) _mainView;
	[mainView setNeedsDisplayInRect:mainView.bounds];
}