/* *
 * This sample demonstrates handling intents from an Alexa skill using the Alexa Skills Kit SDK (v2).
 * Please visit https://alexa.design/cookbook for additional examples on implementing slots, dialog management,
 * session persistence, api calls, and more.
 * */

 // This skill has been created using the Alexa Hello world template and then tweaking it, adding in APLA, APL, & the Motion API.
const Alexa = require('ask-sdk-core');
// i18n library dependency, we use it below in a localisation interceptor
const i18n = require('i18next');
// i18n strings for all supported locales
const languageStrings = require('./languageStrings');

const LaunchRequestHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'LaunchRequest';
    },
    handle(handlerInput) {

        
        // Add APL directive to response
        if (Alexa.getSupportedInterfaces(handlerInput.requestEnvelope)['Alexa.Presentation.APL']) {
            // Create Render Directive
            handlerInput.responseBuilder
                .addDirective({
                    type: 'Alexa.Presentation.APL.RenderDocument',
                    token: 'token',
                    document: require('./haunted.json'),
                    datasources: {
                        "hauntData":{
                            "images":{
                                "eyes": "https://pockoalexa.s3.amazonaws.com/APL_DEMO/spookyPortrait_eyes.png"
                            },
                            "eyeProp":{
                                "dist": 10
                            }
                        }
                    }
                })
        }

        return handlerInput.responseBuilder
            .addDirective({
                type: 'Alexa.Presentation.APLA.RenderDocument',
                token: 'token',
                document: require('./eyeMoveAPLA.json'),
                datasources: {}
            })
            .getResponse();
    },
};

const HelloWorldIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'HelloWorldIntent';
    },
    handle(handlerInput) {
        const speakOutput = handlerInput.t('HELLO_MSG');

        return handlerInput.responseBuilder
            .speak(speakOutput)
            //.reprompt('add a reprompt if you want to keep the session open for the user to respond')
            .getResponse();
    }
};

const HelpIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.HelpIntent';
    },
    handle(handlerInput) {
        const speakOutput = handlerInput.t('HELP_MSG');

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(speakOutput)
            .getResponse();
    }
};

const CancelAndStopIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && (Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.CancelIntent'
                || Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.StopIntent');
    },
    handle(handlerInput) {
        const speakOutput = handlerInput.t('GOODBYE_MSG');

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .getResponse();
    }
};



/* *
 * FallbackIntent triggers when a customer says something that doesn’t map to any intents in your skill
 * It must also be defined in the language model (if the locale supports it)
 * This handler can be safely added but will be ingnored in locales that do not support it yet 
 * */
const FallbackIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.FallbackIntent';
    },
    handle(handlerInput) {
        const speakOutput = handlerInput.t('FALLBACK_MSG');

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(speakOutput)
            .getResponse();
    }
};
/* *
 * SessionEndedRequest notifies that a session was ended. This handler will be triggered when a currently open 
 * session is closed for one of the following reasons: 1) The user says "exit" or "quit". 2) The user does not 
 * respond or says something that does not match an intent defined in your voice model. 3) An error occurs 
 * */
const SessionEndedRequestHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'SessionEndedRequest';
    },
    handle(handlerInput) {
        console.log(`~~~~ Session ended: ${JSON.stringify(handlerInput.requestEnvelope)}`);
        // Any cleanup logic goes here.
        return handlerInput.responseBuilder.getResponse(); // notice we send an empty response
    }
};
/* *
 * The intent reflector is used for interaction model testing and debugging.
 * It will simply repeat the intent the user said. You can create custom handlers for your intents 
 * by defining them above, then also adding them to the request handler chain below 
 * */
const IntentReflectorHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest';
    },
    handle(handlerInput) {
        const intentName = Alexa.getIntentName(handlerInput.requestEnvelope);
        const speakOutput = handlerInput.t('REFLECTOR_MSG', {intentName: intentName});

        return handlerInput.responseBuilder
            .speak(speakOutput)
            //.reprompt('add a reprompt if you want to keep the session open for the user to respond')
            .getResponse();
    }
};
/**
 * Generic error handling to capture any syntax or routing errors. If you receive an error
 * stating the request handler chain is not found, you have not implemented a handler for
 * the intent being invoked or included it in the skill builder below 
 * */
const ErrorHandler = {
    canHandle() {
        return true;
    },
    handle(handlerInput, error) {
        const speakOutput = handlerInput.t('ERROR_MSG');
        console.log(`~~~~ Error handled: ${JSON.stringify(error)}`);

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(speakOutput)
            .getResponse();
    }
};

// This request interceptor will bind a translation function 't' to the handlerInput
const LocalisationRequestInterceptor = {
    process(handlerInput) {
        i18n.init({
            lng: Alexa.getLocale(handlerInput.requestEnvelope),
            resources: languageStrings
        }).then((t) => {
            handlerInput.t = (...args) => t(...args);
        });
    }
};
/**
 * This handler acts as the entry point for your skill, routing all request and response
 * payloads to the handlers above. Make sure any new handlers or interceptors you've
 * defined are included below. The order matters - they're processed top to bottom 
 * */
exports.handler = Alexa.SkillBuilders.custom()
    .addRequestHandlers(
        LaunchRequestHandler,
        HelloWorldIntentHandler,
        HelpIntentHandler,
        CancelAndStopIntentHandler,
        FallbackIntentHandler,
        SessionEndedRequestHandler,
        IntentReflectorHandler)
    .addErrorHandlers(
        ErrorHandler)
    .addRequestInterceptors(
        LocalisationRequestInterceptor)
    .withCustomUserAgent('sample/hello-world/v1.2')
    .lambda();
