//
//  AppDelegate.m
//  MouseTracker
//

#import <Cocoa/Cocoa.h>
#import <AppKit/NSAccessibility.h>

#import "AppDelegate.h"
#import "UIElementUtilities.h"

// these are private
@interface AppDelegate () {

}

@property (weak) IBOutlet NSWindow *window;
@end

@implementation AppDelegate

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    if (AXIsProcessTrustedWithOptions(NULL)) {
    //    NSLog(@"Trusted I guess");
    }
    if (!AXAPIEnabled()) {
        NSLog(@"Accessibility API is not enabled, go to System Preferences");
    }
    NSLog(@"Creating system wide accessibility object");
    _systemWideAccessibilityObject = AXUIElementCreateSystemWide();
    NSLog(@"%@", CFCopyDescription(_systemWideAccessibilityObject));

    _currentUIElement = NULL;

    // if (timer == nil) ...
    timer = [NSTimer scheduledTimerWithTimeInterval:0.5
                                             target:self
                                           selector:@selector(checkMouse:)
                                           userInfo:nil
                                            repeats:YES];
}

- (void)dealloc {
    [timer invalidate];
    timer = nil;

    if (_systemWideAccessibilityObject)
        CFRelease(_systemWideAccessibilityObject);
    if (_currentUIElement)
        CFRelease (_currentUIElement);
    [super dealloc];
}

- (void)checkMouse:(NSTimer *)theTimer
{
    mouseLocation = [NSEvent mouseLocation];

    // check to see if the mouse even moved
    if (!NSEqualPoints(mouseLocation, lastMouseLocation)) {
        _mouseX.stringValue = [NSString stringWithFormat:@"%.2f", mouseLocation.x];
        _mouseY.stringValue = [NSString stringWithFormat:@"%.2f", mouseLocation.y];

        CGPoint carbonPoint = [UIElementUtilities carbonScreenPointFromCocoaScreenPoint:mouseLocation];
        AXUIElementRef elementUnderCursor = NULL;
        // grab what is under the current mouse location
        accessibilityErrorCode = AXUIElementCopyElementAtPosition(_systemWideAccessibilityObject, carbonPoint.x, carbonPoint.y, &elementUnderCursor);

        NSArray *array = nil; //  = [NSArray array];
        AXUIElementCopyAttributeNames(elementUnderCursor, (CFArrayRef *)&array);

        if (accessibilityErrorCode == kAXErrorSuccess) {
            NSLog(@"Accessibility Code: %d", accessibilityErrorCode);
            NSLog(@"%@", CFCopyDescription(elementUnderCursor));

            // print something about the UI element
        } else {
            // we borked

            NSLog(@"Accessibility Error Code: %d", accessibilityErrorCode);
            NSLog(@"Description: %@", CFCopyDescription(elementUnderCursor));
        }

        lastMouseLocation = mouseLocation;
    }
}

- (void)applicationWillTerminate:(NSNotification *)aNotification {
    // Insert code here to tear down your application
}


/*

 kAXErrorSuccess                 = 0,
 kAXErrorFailure                = -25200,
 kAXErrorIllegalArgument            = -25201,
 kAXErrorInvalidUIElement            = -25202,
 kAXErrorInvalidUIElementObserver        = -25203,
 kAXErrorCannotComplete            = -25204,
 kAXErrorAttributeUnsupported        = -25205,
 kAXErrorActionUnsupported            = -25206,
 kAXErrorNotificationUnsupported        = -25207,
 kAXErrorNotImplemented            = -25208,
 kAXErrorNotificationAlreadyRegistered    = -25209,
 kAXErrorNotificationNotRegistered        = -25210,
 kAXErrorAPIDisabled                = -25211,
 kAXErrorNoValue                = -25212,
 kAXErrorParameterizedAttributeUnsupported    = -25213,
 kAXErrorNotEnoughPrecision    = -25214

 AXError AXUIElementCopyAttributeNames (AXUIElementRef element, CFArrayRef *names)

 Returns a list of all the attributes supported by element

 */

@end