//
//  ProfileChangePinViewController.swift
//  GME Remit
//
//  Created by Shiran on 8/17/20.
//  Copyright © 2020 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import  Localize_Swift

class ProfileChangePinViewController: UIViewController {
    enum PasswordType {
        case old
        case new
        case newConfirm
    }
    
    struct StringConstants {
        let passwordErrorText = "password_error_text".localized()
        
        let newPinTitleText = "New PIN"
        let currentPinTitleText = "Current PIN"
        let confirmPinTitleText = "Confirm PIN"
        let saveText = "save_text".localized()
        let titleText = "Change PIN"
        let successText = "success_text".localized()
        let emptyPasswordError = "PIN cannot be empty"
        let confirmPasswordError = "Confirm PIN cannot be empty"
        let passwordPolicy = "PIN must be of 6 characters"
        
    }

    @IBOutlet weak var changePinBttn: UIButton!
    @IBOutlet weak var currentPinTxtField: ValidationTextField!
    @IBOutlet weak var newPinTxtField: ValidationTextField!
    @IBOutlet weak var confirmPinTxtField: ValidationTextField!
    @IBOutlet weak var currentPinToggleButton: UIButton!
    @IBOutlet weak var newPinToggleButton: UIButton!
    @IBOutlet weak var confirmPinToggleButton: UIButton!
    
    @IBAction func changePinBttnPressed(_ sender: UIButton) {
        
        let currentPassword = self.encryptedOldPassword
        let newPassword = self.encryptedPassword
        let confirmPassword = self.encryptedConfirmPassword
        
        let result = self.isValid(
            currentPassword: currentPassword,
            password: newPassword,
            confirmPassword: confirmPassword
        )
        
        if result.isValid {
            let userId = Utility.getMyUserName()
            let param =
                [
                    "UserId" : userId,
                    "CurrentPin": currentPassword,
                    "NewPin": newPassword,
                    "ConfirmNewPin": confirmPassword
            ]
            
            self.updatePassword(param: param)
        }else {
            let message = result.error
            self.alert(type: .error, message: message.localizedDescription)
        }
    }
    @IBAction func currentPinButton(_ sender: UIButton) {
        currentPinTxtField.isSecureTextEntry = !currentPinTxtField.isSecureTextEntry
        currentPinTxtField.isSecureTextEntry ? currentPinToggleButton.setImage(UIImage(named: "Show"), for: .normal) : currentPinToggleButton.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func newPinButton(_ sender: UIButton) {
        newPinTxtField.isSecureTextEntry = !newPinTxtField.isSecureTextEntry
        newPinTxtField.isSecureTextEntry ? newPinToggleButton.setImage(UIImage(named: "Show"), for: .normal) : newPinToggleButton.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func confirmPinButton(_ sender: UIButton) {
        confirmPinTxtField.isSecureTextEntry = !confirmPinTxtField.isSecureTextEntry
        confirmPinTxtField.isSecureTextEntry ? confirmPinToggleButton.setImage(UIImage(named: "Show"), for: .normal) : confirmPinToggleButton.setImage(UIImage(named: "Hide"), for: .normal)
    }
    
    func updatePassword(param: [String: String]) {
        self.updatePin(
            params: param,
            success: { (message) in
                    self.alertWithOk(
                        type: .success,
                        message: message,
                        title: "success_text".localized(),
                        okTitle: "Ok") {
                            self.navigationController?.popViewController(animated: true)
                    }
            },
            failure: { (error) in
                self.alert(type: .error, message: error.localizedDescription)
        }
        )
    }
    
    // MARK: - Properties
    var encryptedPassword: String = ""
    var encryptedOldPassword = ""
    var encryptedConfirmPassword = ""
    
    private var selectedType: PasswordType = .old
    
    private var isValid = false {
        didSet {
//            changePinBttn.isEnabled = isValid
//            changePinBttn.backgroundColor = isValid ? .themeRed : .themeText
            changePinBttn.isEnabled = isValid
            changePinBttn.backgroundColor = isValid ? .themeRed : .themeRed
        }
    }
    
    // MARK: Life Cycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.isValid = false
        self.setupNormalNavigation()
        self.newPinTxtField.isSecureTextEntry = true
        self.confirmPinTxtField.isSecureTextEntry = true
        self.currentPinTxtField.isSecureTextEntry = true
        
        newPinTxtField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        confirmPinTxtField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        currentPinTxtField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        
        currentPinTxtField.validCondition = {$0.count > 5}
        newPinTxtField.validCondition = {$0.count > 5}
        confirmPinTxtField.validCondition = {$0.count > 5}
        
        configureLanguage()
        
        changePinBttn.layer.cornerRadius = 6
        
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationItem.title =  StringConstants().titleText
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        self.navigationItem.title = ""
    }
    
    func configureLanguage() {
        currentPinTxtField.placeholder = "currentPin_text".localized()
        currentPinTxtField.titleText = "currentPin_text".localized()
        currentPinTxtField.errorMessage = "new_pin_error_text".localized()
        
        newPinTxtField.placeholder = "newPin_text".localized()
        newPinTxtField.titleText = "newPin_text".localized()
        newPinTxtField.errorMessage = "new_pin_error_text".localized()
        
        confirmPinTxtField.placeholder = "confirmNewPin_text".localized()
        confirmPinTxtField.titleText = "confirmNewPin_text".localized()
        confirmPinTxtField.errorMessage = "new_pin_error_text".localized()
        
        self.changePinBttn.setTitle(StringConstants().saveText, for: UIControl.State.normal)
    }
    
    @objc private func editingChanged(_ textField: UITextField) {
        switch textField {
        case currentPinTxtField:
            encryptedOldPassword = textField.text ?? ""
        case newPinTxtField:
            encryptedPassword = textField.text ?? ""
        case confirmPinTxtField:
            encryptedConfirmPassword = textField.text ?? ""
        default:
            break
        }
        self.isValid = (encryptedOldPassword != "" && encryptedPassword != "" && encryptedConfirmPassword != "")
    }
  
}

extension ProfileChangePinViewController {
    private func isValidPasword(password: String, confirmPassword: String) -> (isValid: Bool, error: String) {
        var error = ""
        var isValid = true
        
        if password.isEmpty && password.validateRegex(regex: passwordRegex){
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        if confirmPassword.isEmpty && confirmPassword.validateRegex(regex: passwordRegex){
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        
        return (isValid, error)
    }
    // MARK: Converting entities
    
    private func isValid(
        currentPassword: String,
        password: String,
        confirmPassword: String
    ) -> (isValid: Bool, error: Error) {
        var error = ""
        var isValid = true
        // user name
        
        if currentPassword.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        
        let result = self.isValidPasword(password: password, confirmPassword: confirmPassword)
        
        if !result.isValid {
            error = "\(error) \(result.error)"
            isValid = false
        }
        
        let newError = NSError(
            domain: "LoginInteractor",
            code: 0,
            userInfo: [NSLocalizedDescriptionKey : error]
        )
        
        return (isValid, newError)
    }
    
}

extension ProfileChangePinViewController: UpdatePinService {
    
}

protocol UpdatePinService: ApiServiceType {
    func updatePin(
        params: [String: String],
        success: @escaping (String?) -> Void,
        failure: @escaping (Error) -> Void
    )
}

extension UpdatePinService {
    func updatePin(
        params: [String: String],
        success: @escaping (String?) -> Void,
        failure: @escaping (Error) -> Void
    ) {
        let url = baseUrl + "/mobile/changeTxnPin"
        auth.request(
            method: .post,
            url: url,
            params: params,
            needsAuthorization: true,
            success: { (response: SuccessMessageContainer) in
                if (response.errorCode ?? "") == "1" {
                    let error = NSError(
                        domain: "Network",
                        code: 0,
                        userInfo: [NSLocalizedDescriptionKey : response.message ?? ""]
                    )
                    failure(error)
                } else {
                    success(response.message)
                }
        },
            failure: { (error) in
                failure(error)
        }
        )
    }
}