//
//  ChangePinAndPasswordViewController.swift
//  GME Remit
//
//  Created by Shiran on 9/17/20.
//  Copyright © 2020 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import Localize_Swift

class ChangePinAndPasswordViewController: UIViewController {
    
    enum PasswordType {
        case old
        case new
        case newConfirm
    }
    
    enum PinType {
        case old
        case new
        case newConfirm
    }
    
    struct StringConstants {
        let emptyPasswordError = "password_empty_error".localized()
        let emptyPinError = "new_pin_error_text".localized()
        let confirmPasswordError = "password_confirm_empty_error".localized()
        
        let titleText = "change_pin_password_title_text".localized()
        let newPassword = "new_password_text".localized()
        let currentPin = "currentPin_text".localized()
        let newPin = "newPin_text".localized()
        let confirmNewPin = "confirmNewPin_text".localized()
        let currentPassword = "current_password_text".localized()
        let confirmPassword = "confirm_password_text".localized()
        let save = "save_password_text".localized()
    }
    
    var encryptedCurrentPassword = ""
    var encryptedNewPassword = ""
    var encryptedConfirmPassword = ""
    
    var encryptedCurrentPin = ""
    var encryptedNewPin = ""
    var encryptedConfirmPin = ""
    
    @IBOutlet weak var currentPasswordTextField: ValidationTextField!
    @IBOutlet weak var newPasswordTextField: ValidationTextField!
    @IBOutlet weak var confirmPasswordTextField: ValidationTextField!
    @IBOutlet weak var currentPinTextField: ValidationTextField!
    @IBOutlet weak var newPinTextField: ValidationTextField!
    @IBOutlet weak var confirmPinTextField: ValidationTextField!
    @IBOutlet weak var saveButton: UIButton!
    @IBOutlet weak var contentView: UIView!
    @IBOutlet weak var currentPassToggle: UIButton!
    @IBOutlet weak var newPassToggle: UIButton!
    @IBOutlet weak var confirmPassToggle: UIButton!
    @IBOutlet weak var currentPinToggle: UIButton!
    @IBOutlet weak var newPinToggle: UIButton!
    @IBOutlet weak var confirmPinToggle: UIButton!
    
    private var selectedPasswordType: PasswordType = .old
    private var selectedPinType: PinType = .old
    
    private var isValid = false {
        didSet {
            saveButton.isEnabled = true
            saveButton.backgroundColor = isValid ? .themeRed : .themeRed
        }
    }

    // MARK: Life Cycle
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupNormalNavigation()
        
        self.isValid = false
        self.newPasswordTextField.isSecureTextEntry = true
        self.confirmPasswordTextField.isSecureTextEntry = true
        self.currentPasswordTextField.isSecureTextEntry = true
        
        self.newPinTextField.isSecureTextEntry = true
        self.currentPinTextField.isSecureTextEntry = true
        self.confirmPinTextField.isSecureTextEntry = true
        
        newPasswordTextField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        confirmPasswordTextField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        currentPasswordTextField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        
        newPinTextField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        confirmPinTextField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        currentPinTextField.addTarget(self, action: #selector(editingChanged(_:)), for: .editingChanged)
        
        currentPinTextField.validCondition = {$0.count > 5}
        newPinTextField.validCondition = {$0.count > 5}
        confirmPinTextField.validCondition = {$0.count > 5}
        
        currentPasswordTextField.validCondition = { !$0.isEmpty}
        newPasswordTextField.validCondition = { !$0.isEmpty && $0.validateRegex(regex: passwordRegex)}
        confirmPasswordTextField.validCondition = { !$0.isEmpty && $0.validateRegex(regex: passwordRegex)}
        
        configureLanguage()
        saveButton.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() {
        self.currentPasswordTextField.placeholder = StringConstants().currentPassword
        currentPasswordTextField.errorMessage = "password_error_text".localized()
        currentPasswordTextField.titleText = StringConstants().currentPassword
        
        self.newPasswordTextField.placeholder = StringConstants().newPassword
        newPasswordTextField.errorMessage = "password_error_text".localized()
        self.newPasswordTextField.titleText = StringConstants().newPassword
        
        self.confirmPasswordTextField.placeholder = StringConstants().confirmPassword
        confirmPasswordTextField.errorMessage = "password_error_text".localized()
        self.confirmPasswordTextField.titleText = StringConstants().confirmPassword
        
        self.currentPinTextField.placeholder = StringConstants().currentPin
        self.currentPinTextField.titleText = StringConstants().currentPin
        currentPinTextField.errorMessage = "new_pin_error_text".localized()
        
        self.newPinTextField.placeholder = StringConstants().newPin
        self.newPinTextField.titleText = StringConstants().newPin
        self.newPinTextField.errorMessage = "new_pin_error_text".localized()
        
        self.confirmPinTextField.placeholder = StringConstants().confirmNewPin
        self.confirmPinTextField.titleText = StringConstants().confirmNewPin
        self.confirmPinTextField.errorMessage = "new_pin_error_text".localized()

        self.saveButton.setTitle(StringConstants().save, for: UIControl.State.normal)
    }
    @IBAction func currentPassButton(_ sender: UIButton) {
        currentPasswordTextField.isSecureTextEntry = !currentPasswordTextField.isSecureTextEntry
        currentPasswordTextField.isSecureTextEntry ? currentPassToggle.setImage(UIImage(named: "Show"), for: .normal) : currentPassToggle.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func newPassButton(_ sender: UIButton) {
        newPasswordTextField.isSecureTextEntry = !newPasswordTextField.isSecureTextEntry
        newPasswordTextField.isSecureTextEntry ? newPassToggle.setImage(UIImage(named: "Show"), for: .normal) : newPassToggle.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func confirmPassButton(_ sender: UIButton) {
        confirmPasswordTextField.isSecureTextEntry = !confirmPasswordTextField.isSecureTextEntry
        confirmPasswordTextField.isSecureTextEntry ? confirmPassToggle.setImage(UIImage(named: "Show"), for: .normal) : confirmPassToggle.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func currentPinButton(_ sender: UIButton) {
        currentPinTextField.isSecureTextEntry = !currentPinTextField.isSecureTextEntry
        currentPinTextField.isSecureTextEntry ? currentPinToggle.setImage(UIImage(named: "Show"), for: .normal) : currentPinToggle.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func newPinButton(_ sender: UIButton) {
        newPinTextField.isSecureTextEntry = !newPinTextField.isSecureTextEntry
        newPinTextField.isSecureTextEntry ? newPinToggle.setImage(UIImage(named: "Show"), for: .normal) : newPinToggle.setImage(UIImage(named: "Hide"), for: .normal)
    }
    @IBAction func confirmPinButton(_ sender: UIButton) {
        confirmPinTextField.isSecureTextEntry = !confirmPinTextField.isSecureTextEntry
        confirmPinTextField.isSecureTextEntry ? confirmPassToggle.setImage(UIImage(named: "Show"), for: .normal) : confirmPassToggle.setImage(UIImage(named: "Hide"), for: .normal)
    }
    
    @IBAction func savePasswordChanges(_ sender: Any) {
        let currentPassword = self.encryptedCurrentPassword
        let newPassword = self.encryptedNewPassword
        let confirmPassword = self.encryptedConfirmPassword
        
        let currentPin = self.encryptedCurrentPin
        let newPin = self.encryptedNewPin
        let confirmPin = self.encryptedConfirmPin
    
        let result = self.isValid(currentPassword: currentPassword, password: newPassword, confirmPassword: confirmPassword, currentPin: currentPin, pin: newPin, confirmPin: confirmPin)
        
        if result.isValid {
            let userId = Utility.getMyUserName()
            let param = [
                "UserId": userId,
                "CurrentPassword": currentPassword,
                "NewPassword": newPassword,
                "ConfirmNewPassword": confirmPassword,
                "CurrentPin": currentPin,
                "NewPin": newPin,
                "ConfirmNewPin": confirmPin
            ]
            print("params:\(param)")
            self.updatePinAndPassword(param: param)
        } else {
            let message = result.error
            self.alertWithOk(type: .error, message: message.localizedDescription, title: "Error", okTitle: "Ok", okAction: nil)
        }
    }
    
    func updatePinAndPassword(param: [String: String]) {
        self.updatePinAndPassword(
            params: param,
            success: { (message) in
                    self.alertWithOk(
                        type: .success,
                        message: message,
                        title: "success_text".localized(),
                        okTitle: "Ok") {
                            KeyChain.shared.save(data: self.encryptedNewPassword, key: .password)
                            self.navigationController?.popViewController(animated: true)
                    }
            }, failure: { (error) in
                self.alertWithOk(type: .error, message: error.localizedDescription, title: "Error", okTitle: "Ok", okAction: nil)
        })
    }
}

extension ChangePinAndPasswordViewController {
    private func isValidPasword(password: String, confirmPassword: String, pin: String, confirmPin: String) -> (isValid: Bool, error: String) {
        var error = ""
        var isValid = true
        
        if password.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        if confirmPassword.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        if pin.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        if confirmPin.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        
        return (isValid, error)
    }
    
    private func isValid(
        currentPassword: String,
        password: String,
        confirmPassword: String,
        currentPin: String,
        pin: String,
        confirmPin: String
    ) -> (isValid: Bool, error: Error) {
        var error = ""
        var isValid = true
        
        if currentPassword.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        
        if currentPin.isEmpty {
            error = "\(error)\n\(StringConstants().emptyPasswordError)"
            isValid = false
        }
        
        let result = self.isValidPasword(password: password, confirmPassword: confirmPassword, pin: pin, confirmPin: confirmPin)
        
        if !result.isValid {
            error = "\(error) \(result.error)"
            isValid = false
        }
        
        let newError = NSError(
            domain: "LoginInteractor",
            code: 0,
            userInfo: [NSLocalizedDescriptionKey : error]
        )
        
        return (isValid, newError)
    }
    
}

extension ChangePinAndPasswordViewController: UpdatePinAndPasswordService {
    
}

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

extension UpdatePinAndPasswordService {
    func updatePinAndPassword(
        params: [String: String],
        success: @escaping (String?) -> Void,
        failure: @escaping (Error) -> Void
    ) {
        let url = baseUrl + "/mobile/changePasswordAndTxnPin"
        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.data?.message)
                }
        },
            failure: { (error) in
                failure(error)
        }
        )
    }
}

extension ChangePinAndPasswordViewController {
    @objc private func editingChanged(_ textField: UITextField) {
        switch textField {
        case currentPasswordTextField:
            encryptedCurrentPassword = textField.text ?? ""
            
        case newPasswordTextField:
            encryptedNewPassword = textField.text ?? ""
            
        case confirmPasswordTextField:
            encryptedConfirmPassword = textField.text ?? ""
            
        case currentPinTextField:
            encryptedCurrentPin = textField.text ?? ""
            
        case newPinTextField:
            encryptedNewPin = textField.text ?? ""
            
        case confirmPinTextField:
            encryptedConfirmPin = textField.text ?? ""
            
        default:
            break
        }
        self.isValid = (encryptedCurrentPassword != "" && encryptedNewPassword != "" && encryptedConfirmPassword != "")
    }
}