// ViewController.swift

let validator = Validator()

override func viewDidLoad() {
    super.viewDidLoad()

    // Validation Rules are evaluated from left to right.
    validator.registerField(fullNameTextField, rules: [RequiredRule(), FullNameRule()])

    // You can pass in error labels with your rules
    validator.registerField(emailTextField, errorLabel: emailErrorLabel, rules: [RequiredRule(), EmailRule()])

    // You can validate against other fields using ConfirmRule
    validator.registerField(emailConfirmTextField, errorLabel: emailConfirmErrorLabel, rules: [ConfirmationRule(confirmField: emailTextField)])

    // You can now pass in regex and length parameters through overloaded contructors
    validator.registerField(phoneNumberTextField, errorLabel: phoneNumberErrorLabel, rules: [RequiredRule(), MinLengthRule(length: 9)])
    validator.registerField(zipcodeTextField, errorLabel: zipcodeErrorLabel, rules: [RequiredRule(), ZipCodeRule(regex = "\\d{5}")])

}

@IBAction func signupTapped(sender: AnyObject) {
    validator.validateAll(delegate:self)
}

// ValidationDelegate methods

func validationWasSuccessful() {
    // submit the form
}

func validationFailed(errors:[UITextField:ValidationError]) {
    // turn the fields to red
    for (field, error) in validator.errors {
        field.layer.borderColor = UIColor.redColor().CGColor
        field.layer.borderWidth = 1.0
        error.errorLabel?.text = error.errorMessage // works if you added labels
        error.errorLabel?.hidden = false
    }
}

class SSNVRule: Rule {
    let REGEX = "^\\d{3}-\\d{2}-\\d{4}$"

    init(){}

    // allow for custom variables to be passed
    init(regex:String){
        self.REGEX = regex
    }

    func validate(value: String) -> Bool {
        if let ssnTest = NSPredicate(format: "SELF MATCHES %@", REGEX) {
            if ssnTest.evaluateWithObject(value) {
                return true
            }
            return false
        }
    }

    func errorMessage() -> String{
        return "Not a valid SSN"
    }
}