//
//  ViewController.swift
//  Validator
//
//  Created by Jeff Potter on 11/20/14.
//  Copyright (c) 2014 jpotts18. All rights reserved.
//

import Foundation
import UIKit
import SwiftValidator

class ViewController: UIViewController , ValidationDelegate, UITextFieldDelegate {

    // TextFields
    @IBOutlet weak var fullNameTextField: UITextField!
    @IBOutlet weak var emailTextField: UITextField!
    @IBOutlet weak var phoneNumberTextField: UITextField!
    @IBOutlet weak var zipcodeTextField: UITextField!
    @IBOutlet weak var emailConfirmTextField: UITextField!
    
    // Error Labels
    @IBOutlet weak var fullNameErrorLabel: UILabel!
    @IBOutlet weak var emailErrorLabel: UILabel!
    @IBOutlet weak var phoneNumberErrorLabel: UILabel!
    @IBOutlet weak var zipcodeErrorLabel: UILabel!
    @IBOutlet weak var emailConfirmErrorLabel: UILabel!
    
    let validator = Validator()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(ViewController.hideKeyboard)))
        
        validator.styleTransformers(success:{ (validationRule) -> Void in
            print("here")
            // clear error label
            validationRule.errorLabel?.isHidden = true
            validationRule.errorLabel?.text = ""
            if let textField = validationRule.field as? UITextField {
                textField.layer.borderColor = UIColor.green.cgColor
                textField.layer.borderWidth = 0.5
                
            }
        }, error:{ (validationError) -> Void in
            print("error")
            validationError.errorLabel?.isHidden = false
            validationError.errorLabel?.text = validationError.errorMessage
            if let textField = validationError.field as? UITextField {
                textField.layer.borderColor = UIColor.red.cgColor
                textField.layer.borderWidth = 1.0
            }
        })
        
        validator.registerField(fullNameTextField, errorLabel: fullNameErrorLabel , rules: [RequiredRule(), FullNameRule()])
        validator.registerField(emailTextField, errorLabel: emailErrorLabel, rules: [RequiredRule(), EmailRule()])
        validator.registerField(emailConfirmTextField, errorLabel: emailConfirmErrorLabel, rules: [RequiredRule(), ConfirmationRule(confirmField: emailTextField)])
        validator.registerField(phoneNumberTextField, errorLabel: phoneNumberErrorLabel, rules: [RequiredRule(), MinLengthRule(length: 9)])
        validator.registerField(zipcodeTextField, errorLabel: zipcodeErrorLabel, rules: [RequiredRule(), ZipCodeRule()])
    }

    @IBAction func submitTapped(_ sender: AnyObject) {
        print("Validating...")
        validator.validate(self)
    }

    // MARK: ValidationDelegate Methods
    
    func validationSuccessful() {
        print("Validation Success!")
        let alert = UIAlertController(title: "Success", message: "You are validated!", preferredStyle: UIAlertController.Style.alert)
        let defaultAction = UIAlertAction(title: "OK", style: .default, handler: nil)
        alert.addAction(defaultAction)
        self.present(alert, animated: true, completion: nil)
    
    }
    func validationFailed(_ errors:[(Validatable, ValidationError)]) {
        print("Validation FAILED!")
    }
    
    @objc func hideKeyboard(){
        self.view.endEditing(true)
    }
    
    // MARK: Validate single field
    // Don't forget to use UITextFieldDelegate
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
            validator.validateField(textField){ error in
                if error == nil {
                    // Field validation was successful
                } else {
                    // Validation error occurred
                }
            }
        return true
    }

}