//
//  RadioButton.swift
//  MVMCoreUI
//
//  Created by Suresh, Kamlesh on 4/25/19.
//  Copyright © 2019 Verizon Wireless. All rights reserved.
//

import UIKit


@objcMembers open class RadioButton: ViewConstrainingView, FormValidationFormFieldProtocol {
    
    public let radioButton = MFRadioButton()
    var delegateObject: MVMCoreUIDelegateObject?
    var dummyButton: MFCustomButton?
    let label = Label()
    
    var fieldKey: String?
    var formValue: Bool?
    var isRequired: Bool = false
    var radioButtonModel: RadioButtonModel?

    
    lazy var radioGroupName: String? = {
         [unowned self] in
        return json?.optionalStringForKey("radioGroupName") ?? json?.optionalStringForKey("fieldKey")
    }()
    
    // MARK: - Inits
    public init() {
        super.init(frame: .zero)
    }
    
    public override init(frame: CGRect) {
        super.init(frame: frame)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    
    open override func setupView() {
        super.setupView()
        guard subviews.count == 0 else {
            return
        }
        
        translatesAutoresizingMaskIntoConstraints = false
        radioButton.translatesAutoresizingMaskIntoConstraints = false
        addSubview(radioButton)
        
        isAccessibilityElement = true
        accessibilityTraits = .none
        accessibilityHint = MVMCoreUIUtility.hardcodedString(withKey: "radio_action_hint")
        
        radioButton.leftAnchor.constraint(equalTo: layoutMarginsGuide.leftAnchor, constant: 0).isActive = true
        radioButton.topAnchor.constraint(greaterThanOrEqualTo: topAnchor, constant: PaddingOne).isActive = true
        bottomAnchor.constraint(greaterThanOrEqualTo: radioButton.bottomAnchor, constant: PaddingOne).isActive = true
        radioButton.centerYAnchor.constraint(equalTo: centerYAnchor).isActive = true

        if let rightView = createRightView() {
            addSubview(rightView)
            rightView.leftAnchor.constraint(equalTo: radioButton.rightAnchor, constant: PaddingHorizontalBetweenRelatedItems).isActive = true
            rightView.rightAnchor.constraint(equalTo: layoutMarginsGuide.rightAnchor, constant: 0).isActive = true
            
            var constraint = rightView.topAnchor.constraint(equalTo: topAnchor, constant: PaddingOne)
            constraint.priority = .defaultHigh
            constraint.isActive = true
            
            constraint = bottomAnchor.constraint(equalTo: rightView.bottomAnchor, constant: PaddingOne)
            constraint.priority = .defaultHigh
            constraint.isActive = true            
        }
        addActionHandler()
    }
    
    func createRightView() -> ViewConstrainingView? {
        let rightView = ViewConstrainingView(constrainingView: label)
        return rightView
    }
    
    func addActionHandler() {
        
        guard dummyButton == nil else {
            return
        }
        
        let dummyButton = MFCustomButton(frame: .zero)
        self.dummyButton = dummyButton
        dummyButton.translatesAutoresizingMaskIntoConstraints = false
        addSubview(dummyButton)
        NSLayoutConstraint.constraintPinSubview(toSuperview: dummyButton)
        bringSubviewToFront(dummyButton)
        
        dummyButton.add({ [weak self] (button) in
            self?.tapAction()
        }, for: .touchUpInside)
    }
    
    func tapAction() {
        if let radioButtonModel = radioButtonModel {
            radioButtonModel.selected(self)
        } else {
            radioButton.isSelected = !radioButton.isSelected
        }
        FormValidator.enableByValidationWith(delegate: delegateObject?.formValidationProtocol)
        changeAccessibilityLabel()
    }
    
    public func isValidField() -> Bool {
        return radioButton.isSelected
    }
    
    public func formFieldName() -> String? {
        return  json?.optionalStringForKey("fieldKey")
    }
    
    public func formFieldGroupName() -> String? {
        return json?.optionalStringForKey("groupName")
    }
    
    public func formFieldValue() -> Any? {
        return radioButton.isSelected
    }
}

// MARK: - MVMCoreUIMoleculeViewProtocol
extension RadioButton {
    
    @objc open override func setWithJSON(_ json: [AnyHashable: Any]?, delegateObject: MVMCoreUIDelegateObject?, additionalData: [AnyHashable: Any]?) {
    
        super.setWithJSON(json, delegateObject: delegateObject, additionalData: additionalData)
        
        // Configure class properties with JSON values
        guard let jsonDictionary = json else {
            return
        }
        
        fieldKey = jsonDictionary.optionalStringForKey("fieldKey")
        isRequired = jsonDictionary.boolForKey("required")        
        self.delegateObject = delegateObject
        
        let radioButtonModel = RadioButtonModel.setupForRadioButtonGroup(radioButton: self,
                                                                     formValidator: delegateObject?.formValidationProtocol?.formValidatorModel?())
        FormValidator.setupValidation(molecule: radioButtonModel, delegate: delegateObject?.formValidationProtocol)
        self.radioButtonModel = radioButtonModel

        label.setWithJSON(jsonDictionary.optionalDictionaryForKey(KeyLabel),
                          delegateObject: delegateObject,
                          additionalData: additionalData)
        changeAccessibilityLabel()
    }
}

// MARK: Accessibility
extension RadioButton {
    func changeAccessibilityLabel()  {
        let stateString = radioButton.isSelected ? "radio_selected_state" : "radio_not_selected_state"
        let localizedStringState = MVMCoreUIUtility.hardcodedString(withKey: stateString) ?? ""
        let accebilityString = (label.accessibilityLabel ?? (json?.optionalStringForKey("accessibilityText") ?? ""))
            + (MVMCoreUIUtility.hardcodedString(withKey: "radio_desc_state") ?? "") + localizedStringState
        accessibilityLabel = accebilityString
    }
}