import Cocoa

class TestClass {
    var name = ""
    var block1: (() -> Void)?
    var block2: (() -> Void)?
    
    var retainCount: Int {
        CFGetRetainCount(self)
    }
    
    init() {
        print("Initializing: \(retainCount)")
    }
    
    func foo() {
        print("Starting Foo: \(retainCount)")
        
        block1 = { [weak self] in
            print("Inside block 1: \(String(describing: self?.retainCount))")
            
            self?.block2 = {
                print("Inside block 2: \(String(describing: self?.retainCount))")
            }
            
            // Execute block 2
            self?.block2?()
            
            print("Finishing block 1: \(String(describing: self?.retainCount))")
        }
        
        // Execute block 1
        block1?()
        
        print("Finishing Foo: \(retainCount)")
    }
    
    func bar() {
        print("Starting Bar: \(retainCount)")
        
        block1 = { [weak self] in
            guard let self = self else { return }
            
            print("Inside block 1: \(self.retainCount)")
            
            self.block2 = { [weak self] in
                print("Inside block 2: \(String(describing: self?.retainCount))")
            }
            
            // Execute block 2
            self.block2?()
            
            print("Finishing block 1: \(self.retainCount)")
        }
        
        // Execute block 1
        block1?()
        
        print("Finishing Bar: \(retainCount)")
    }
    
    
    deinit {
        print("Deinitializing: \(retainCount)")
    }
}

var testClass: TestClass? = TestClass()
testClass?.foo()
testClass?.bar()
testClass = nil