import UIKit

class ViewController: UIViewController {

    var whosTurn = "X"
 
    // these variables will hold the text on each of the
    // 9 buttons that hold an "X", "O", or " "
    
    // row 1
    var b11Text = ""
    var b12Text = ""
    var b13Text = ""
    
    // FINISH ME
    // row 2
    var b21Text = ??
    var b22Text = ??
    var b23Text = ??
    
    // FINISH ME
    // row 3
    // create variables b31Text, b32Text, b33Text 
    // and assign ""

    

    
    // FINISH ME
    // labels reference variables
    // connect the labels
    @IBOutlet weak var resultsLabel: UILabel!
    
    @IBOutlet weak var whosTurnLabel: UILabel!
    
    
    // FINISH ME
    // button reference variables
    // connect all the X O buttons
    
    // buttons on row 1
    @IBOutlet weak var button11: UIButton!
    
    @IBOutlet weak var button12: UIButton!
    
    @IBOutlet weak var button13: UIButton!
    

    // buttons on row 2
    @IBOutlet weak var button21: UIButton!
    
    @IBOutlet weak var button22: UIButton!
    
    @IBOutlet weak var button23: UIButton!
 
    
    // buttons on row 3
    @IBOutlet weak var button31: UIButton!
    
    @IBOutlet weak var button32: UIButton!
    
    @IBOutlet weak var button33: UIButton!

    
    
    
    // this buttonEvent function gets called when
    // you click on 1 of the 9 buttons
    @IBAction func buttonEvent(_ sender: UIButton)
    {
        // sender is the name of the button that
        // got clicked
        
        // this gets the text on the button that
        // got clicked
        let textOnButton = sender.title(for: .normal)!
        
        // here we check to see if a player has
        // already played on this button
        if textOnButton != " "
        {
            return
        }
        
        
        // check to see if whosTurn is equal to "X"
        ????
        {
            sender.setTitle("X", for: .normal)
            
            
            if isWinner(whosTurn)
            {
                // FINISH ME
                // Set the text field on the resultsLabel to say
                // "X Wins!!!"
                resultsLabel.???? = ????
                
                
                return
            }
            else
            {
                // FINISH ME
                // Set whosTurn to "O"
                ?????
                
                
                // FINISH ME
                // Set the text field on the whosTurnLabel to "O"
                ?????
            }
        }
        else
        {
            sender.setTitle("O", for: .normal)
            
            if isWinner(whosTurn)
            {
                // FINISH ME
                // Set the text field on the resultsLabel to say
                // "O Wins!!!"
                resultsLabel.???? = ???????
                
                
                return
            }
            else
            {
                // FINISH ME
                // Set whosTurn to "X"
                ????

                
                // FINISH ME
                // Set the text field on the whosTurnLabel to "X"
                ??????
            }
         }
    }
    
    
    func isWinner(_ whosTurn:String) -> Bool
    {
        // FINISH ME
        // run the method (call the method)
        // getTheTextOnAllNineButtons()
        ?????

        
        
        // check for a winner on row 1
        if b11Text == whosTurn && b12Text == whosTurn && b13Text == whosTurn
        {
            return true
        }
        
        
        // FINISH ME
        // check for a winner on row 2

        
        
        // FINISH ME
        // check for a winner on row 3


 
        // check for a winner on col 1
        if b11Text == whosTurn && b21Text == whosTurn && b31Text == whosTurn
        {
            return true
        }
        
        
        // FINISH ME
        // check for a winner on col 2
        
        
        
        // FINISH ME
        // check for a winner on col 3

        
        
        // FINISH ME
        // check for a winner on diagonal 1 (upper left to lower right)

        
        
        // FINISH ME
        // check for a winner on diagonal 2 (upper right to lower left)


        
        
        
        
        
        return false
    }
    
    
    func getTheTextOnAllNineButtons()
    {
        // get the text for all 9 buttons
        // row 1
        b11Text = button11.title(for: .normal)!
        b12Text = button12.title(for: .normal)!
        b13Text = button13.title(for: .normal)!
        
        
        // FINISH ME
        // row 2
        b21Text = ????!
        b22Text = ????!
        b23Text = ????!


        // FINISH ME
        // row 3



    }
 
    
    func setAllButtonsToEmpty()
    {
        // set row 1 buttons to " "
        button11.setTitle(" ", for: .normal)
        button12.setTitle(" ", for: .normal)
        button13.setTitle(" ", for: .normal)
        
        
        
        // FINISH ME
        // set row 2 buttons to " "



        
        // FINISH ME
        // set row 3 buttons to " "





    }
    
    
    @IBAction func newGameButton(_ sender: UIButton)
    {
        // FINISH ME
        // set whosTurn to "X"
        ?????
        
        
        
        // FINISH ME
        // run (call) the method setAllButtonsToEmpty()
        ??????
        
        
        
        // FINISH ME
        // Set the text field on the resultsLabel to say ""
        resultsLabel.???? = ????

    }
    
    



    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}