const Alexa = require('alexa-sdk');
const APP_ID = 'amzn1.ask.skill.be810433-aaae-4cd3-99fc-708e3047a807';

exports.handler = (event, context, callback) => {
    const alexa = Alexa.handler(event, context);
    alexa.appId = APP_ID;
    alexa.registerHandlers(handlers);
    alexa.execute();
};

const handlers = {
    'LaunchRequest': function() {
        const welcomeMessage = 'Welcome to plan my trip from Lambda. You can say Help me plan my trip';
        const repromptMessage = 'You can use this skill by saying Plan my trip';
        this.response.speak(welcomeMessage).listen(repromptMessage);
        this.emit(':responseReady');
    },
    'SessionEndedRequest': function() {
        // close some connection
        // send out emails
    },
    'AMAZON.HelpIntent': function() {
        this.emit('LaunchRequest');
    },
    'AMAZON.CancelIntent': function() {
        this.response.speak('Goodbye');
        this.emit(':responseReady');
    },
    'AMAZON.StopIntent': function() {
        this.response.speak('Goodbye');
        this.emit(':responseReady');
    },
    'PlanMyTrip': function() {

        if (this.event.request.dialogState === 'COMPLETED') {


            let speechOutput = "Your itenary is ";

            const fromCity = this.event.request.intent.slots.fromCity.value;
            const toCity = this.event.request.intent.slots.toCity.value;
            const travelDate = this.event.request.intent.slots.travelDate.value;
            speechOutput += " from " + fromCity + " to " + toCity + " on " + travelDate;

            this.response.speak(speechOutput);
            this.emit(':responseReady');


        }
        else {

            this.emit(":delegate");

        }
    }
};