//
//  ViewController.swift
//  PracticeMath

import UIKit

class ViewController: UIViewController
{
    // FINISH ME
    // define (create) a variable
    // called num1 and set it to 0
    ????
    
    // FINISH ME
    // define (create) a variable
    // called num2 and set it to 0
    ????
    
    
    // number range 0 - max-1
    var num1Max = 20
    var num2Max = 10
    

    // FINISH ME
    // link Number1 Label to this variable
    // increase the Font Size
    // set the Alignment to Right Justified
    // set the background color
    @IBOutlet weak var num1Label: UILabel!
    
    
    // FINISH ME
    // link Number2 Label to this variable
    // increase the Font Size
    // set the Alignment to Right Justified
    // set the background color
    @IBOutlet weak var num2Label: UILabel!
    
    
    // FINISH ME
    // link Op Label to this variable
    // increase the Font Size
    // set the Alignment to Right Justified
    // set the background color
    @IBOutlet weak var opLabel: UILabel!
    
    
    // FINISH ME
    // link Answer TextField to this variable
    // increase the Font Size
    // set the Border Style
    // set the Alignment to Right Justified
    // set the placeholder to answer
    @IBOutlet weak var userAnswerTextField: UITextField!
    

    // FINISH ME
    // link Correct/Incorrect Label to this variable
    // increase the Font Size
    // set the Border Style
    // set the Alignment to Centered
    // set the text color to your preference
    @IBOutlet weak var correctIncorrectLabel: UILabel!
    
    // FINISH ME
    // link to first Range label
    // increase the Font Size
    @IBOutlet weak var num1RangeLabel: UILabel!
    
    // FINISH ME
    // link to second Range label
    // increase the Font Size
   @IBOutlet weak var num2RangeLabel: UILabel!
    
    
    // this function sets the text on num1RangeLabel to show the Range 0-?
    @IBAction func slider(_ sender: UISlider)
    {
        num1Max = Int( sender.value )
        num1RangeLabel.text = "Range: 0 - \(num1Max-1)"
    }
    
    
    
    // this function sets the text on num2RangeLabel to show the Range 0-?
    @IBAction func slider2(_ sender: UISlider)
    {
        num2Max = Int( sender.value )
        num2RangeLabel.text = "Range: 0 - \(num2Max-1)"
    }
    

    // FINISH ME
    // link to the first slider
    // refers to the first slider
    @IBOutlet weak var slider1: UISlider!
    
    
    // FINISH ME
    // link to the second slider
    // refers to the second slider
    @IBOutlet weak var slider2: UISlider!
    
    
    func createRandomProblem(_ op:String)
    {
        // this gets a random number from 0 to num1Max-1
        num1 = Int (arc4random_uniform(UInt32(num1Max)))
        
        // FINISH me
        // set the num1Label to num1 (but as a String)
        // HINT: create a String object  String(?)
        num1Label.text = ????(num1)
        
        
        // this gets a random number from 0 to num2Max-1
        num2 = Int (arc4random_uniform(UInt32(num2Max)))
        
        // FINISH me
        // set the num2Label to num2 (but as a String)
        // HINT: create a String object  String(num2)
        num2Label.text = ????
        
        
        // FINISH me
        // set the opLabel to op
        opLabel.???? = op
        
        
        // FINISH me
        // set the userAnswerTextField to ""
        userAnswerTextField.text ? ??
        
        
        // FINISH me
        // set the correctIncorrectLabel to ""
        correctIncorrectLabel.???? = ""


    }
    
    
    // FINISH ME
    // link the + button to this function
    // this creates a random addition problem
    @IBAction func addButtonEvent(_ sender: UIButton)
    {
        createRandomProblem("+")
    }
    
    
    // FINISH ME
    // link the - button to this function
    // then write the code to create a new problem
    // (see the addButtonEvent)
    @IBAction func subtractButtonEvent(_ sender: UIButton)
    {
        // FINISH ME
        // call the method
        // createRandomProblem() and send to it the String "-"
        ???
    }
    
    
    // FINISH ME
    // link the * button to this function
    // then write the code to create a new problem
    // (see the addButtonEvent)
    @IBAction func multiplyButtonEvent(_ sender: UIButton)
    {
        // FINISH ME
        // call the method
        // createRandomProblem() and send to it the String "*"
        ???
    }
    
    
    // FINISH ME
    // link the / button to this function
    // then write the code to create a new problem
    // (see the addButtonEvent)
    @IBAction func divideButtonEvent(_ sender: UIButton)
    {
        // FINISH ME
        // call the method
        // createRandomProblem() and send to it the String "/"
        ???
    }
    
    
    // FINISH ME
    // link the % button to this function
    // then write the code to create a new problem
    // (see the addButtonEvent)
    @IBAction func modButtonEvent(_ sender: UIButton)
    {
        // FINISH ME
        // call the method
        // createRandomProblem() and send to it the String "%"
        ????
    }
  

    
    // FINISH ME
    // link the Check button to this function
    @IBAction func checkButtonEvent(_ sender: UIButton)
    {
        // get the text on the button
        let textOnButton = sender.title(for: .normal)!


        // FINISH ME
        // get the text on num1Label and unwrap it
        let num1 = Int(num1Label.????!)
        
        // FINISH ME
        // get the text on num2Label and unwrap it
        // Convert it to an Int
        let num2 = ???(num2Label.????!)
        
        // FINISH ME
        // get the text on userAnswerTextField and unwrap it
        // Convert it to an Int
        let userAnswer = ???(userAnswerTextField.????!)
 
        
        if let num1 = num1, let num2 = num2, let userAnswer = userAnswer
        {
            // FINISH ME
            // define (create) a variable called
            // correctAnswer and set it to 0
            ????
            
            // FINISH ME
            // define (create) a variable called
            // op and set it to opLabel.text!
            ????
            
            
            // FINISH ME
            // finish checking for each op and
            // finding the correct answer
            // +, -, *, /, %
            if op == "+"
            {
                // FINISH ME
                // add num1 and num2
                correctAnswer = ????
            }
            else if op == "-"
            {
                // FINISH ME
                // subtract
                ?????
            }
            else if op == "*"
            {
                // FINISH ME
                // multiply
				????
            }
            else if op == "/"
            {
                // FINISH ME
                // divide
                if num2 == 0
                {
                    correctAnswer = 0
                }
                else
                {
                    correctAnswer = ????
                }
            }
            else if op == "%"
            {
                // FINISH ME
                // mod
                if num2 == 0
                {                    
                	correctAnswer = 0
                }
                else
                {
                    correctAnswer = ????
                }
            }

            
            if textOnButton == "Check" &&  correctAnswer == userAnswer
            {
                // FINISH ME
                // the user answer is correct,
                // so put "Correct!!!" in the
                // text field
                correctIncorrectLabel.???? = ?????
            }
            else
            {
                if textOnButton == "Show"
                {
                    correctIncorrectLabel.text = "\(correctAnswer)"
                }
                else
                {
                    // FINISH ME
                    // the answer is incorrect,
                    // so put incorrect on the text field
                    correctIncorrectLabel.???? = ??????
                }
            }
        }
        else
        {
            // FINISH ME
            // the answer is incorrect
            correctIncorrectLabel.???? = ????
        }

        
    }
    
    override func viewDidLoad()
    {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        // FINISH ME
        // initialize all of your UI objects text fields to ""
        num1Label.text ? ""
        opLabel.text ? ??
        num2Label.text ? ??
        userAnswerTextField.???? = ??
       
        
        correctIncorrectLabel.text = "Click on +, -, *, /, or %"
        
        slider1.value = Float(num1Max)
        num1RangeLabel.text = "Range: 0 - \(num1Max-1)"

        slider2.value = Float(num2Max)
        num2RangeLabel.text = "Range: 0 - \(num1Max-1)"

        
   }

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

    

}