Rock Paper Scissors Alexa Skill

RockPaperScissorsIntentHandler.js

const GamePlayIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'GamePlayIntent';
    },
    handle(handlerInput) {
        
        const userAction = Alexa.getSlotValue(handlerInput.requestEnvelope, 'choice');
        
        let speakOutput = '';
        let repromptOutput =' What is your next move?';
        
        const ACTIONS=[
            'paper',
            'rock',
            'scissors'
        ];

        const alexaAction=ACTIONS[Math.floor(Math.random()*ACTIONS.length)];

        const result = userAction+alexaAction;

        switch(result)
        {
            case 'rockrock':
                speakOutput+="you played rock and i played rock, it is a tie! ";
                break;
            case 'rockpaper':
                speakOutput+="you played rock and i played paper, I win! ";
                break;
            case 'rockscissors':
                speakOutput+="you played rock and i played scissors, you win! congratulations ";
                break;
            case 'paperrock':
                speakOutput+="you played paper and i played rock, you win! congratulations ";
                break;
            case 'paperpaper':
                speakOutput+="you played paper and i played paper, it is a tie! ";
                break;
            case 'paperscissors':
                speakOutput+="you played paper and i played scissors, I win! ";
                break;
            case 'scissorsrock':
                speakOutput+="you played scissors and i played rock, I win! ";
                break;
            case 'scissorspaper':
                speakOutput+="you played scissors and i played paper, you win! congratulations ";
                break;
            case 'scissorscissors':
                speakOutput+="you played scissors and i played scissors, it is a tie! ";
                break;
            default:
                 break;
        }
        return handlerInput.responseBuilder
            .speak(speakOutput + repromptOutput)
            .reprompt(repromptOutput)
            .getResponse();
    }
};