//
//  ChangePasswordViewModel.swift
//  GMERemittance
//
//  Created by Sujal on 2/18/18.
//  Copyright © 2018 Gobal Money Express Co. Ltd. All rights reserved.
//

import Foundation

class ChangePasswordViewModel: SignUpViewModel {
    var passwordChanged: Box<Bool?> = Box(nil)
    var oldPassword: String!
    var newPassword: String!
    var confirmPassword: String!
    
    var passwordConnectionTimeOut: Box<Bool?> = Box(nil)
}

extension ChangePasswordViewModel {
    
    /**
        to update old password
     */
    func updateOldPassword(inputString: String) {
        self.oldPassword = inputString
    }
    
    /**
     to update new password
     */
    func updateNewPassword(inputString: String) {
        self.newPassword = inputString
    }
    
    /**
     to confrim new password
     */
    func updateConfirmPassword(inputString: String) {
        self.confirmPassword = inputString
    }
    
    /**
     to validate empty textfield
     */
    func validateFields() -> isValid {
        guard oldPassword != nil && newPassword != nil && confirmPassword != nil else {
            return .InValid("Please fill all the fields")
        }
        guard isValidPasswordLength(password: oldPassword) && isValidPasswordLength(password: newPassword) && isValidPasswordLength(password: confirmPassword) else {
            return .InValid("Password lengths do not match the minimum criteria")
        }
        guard confirmPassword == newPassword else {
            return .InValid("Passwords do not match")
        }
        return .Valid
    }
    
    /**
        Api request to change password
     */
    func requestPasswordChanges() {
        let userId: String = UserDefaults.standard.object(forKey: "com.gmeremit.username") as! String
        if !Reachability.isConnectedToNetwork() {
            self.internetConnection.value = false
        } else {
            RestApiMananger.sharedInstance.changePassword(userId: userId, currentPassword: oldPassword, newPassword: newPassword) { result in
                switch result {
                case .success(_):
                    UserDefaults.standard.set(self.newPassword.toBase64(), forKey: "com.gmeremit.password")
                    self.passwordChanged.value = true
                case let .failure(errorJSON):
                    self.setErrorMessage(message: errorJSON["message"].stringValue)
                    self.passwordChanged.value = false
                case .updateAccessCode:
                    RestApiMananger.sharedInstance.updateAccessCode(userId: userId, password: self.password!) {
                        result in
                        if result != "Error"{
                            let uuid = RestApiMananger.sharedInstance.getUUID()
                            UserDefaults.standard.set((result + ":" + uuid).toBase64(), forKey: "com.gmeremit.accessCode")
                            self.requestPasswordChanges()
                        }
                    }
                case .logOutUser():
                    RestApiMananger.sharedInstance.cancelExistingNetworkCalls()
                    self.anotherLogin.value = true
                case .timeOut:
                    self.passwordConnectionTimeOut.value = false
                }
            }
        }
    }
}