require('isomorphic-fetch');
const config = require('../config');
var request = require("request");
var token = require('./token');


var getBuildStatus = function(skillID){
    try{
        fetch(`https://api.amazonalexa.com/v0/skills/${skillID}/interactionModel/locales/en-US/status`, {
            method: 'GET',
            headers: {
                Authorization: TOKEN
            },
        }).then(l=>l.text()).then(result=>{
            return result;
        });
    }catch(e){
        console.log("err : " + e);
    }
}

var refreshToken = function(db){
    return new Promise((resolve, reject)=>{
        var options = { method: 'POST',
        url: 'https://api.amazon.com/auth/o2/token',
        headers: 
         { 'cache-control': 'no-cache',
           'content-type': 'application/x-www-form-urlencoded' },
        form: 
         { grant_type: 'refresh_token',
           refresh_token: config.REFRESH_TOKEN,
           client_id: config.CLIENT_ID,
           client_secret: config.CLIENT_SECRET } };
      
        request(options, function (error, response, body) {
            if (error) reject(error);
            parsedResponse = JSON.parse(body);
            if (parsedResponse.refresh_token){
                try{
                    token.updateTokens(parsedResponse.refresh_token, parsedResponse.access_token, parsedResponse.expires_in,db);
                    resolve();
                }catch(e){
                    reject(e);
                }
            }
        });
    });
}

var generateInteractionModel = function(skill){
    let result = {};
    let allIntents = [];
    let defaultIntents = [{
            name: "AMAZON.CancelIntent",
            samples: []
            },
            {
            name: "AMAZON.HelpIntent",
            samples: []
            },
            {
            name: "AMAZON.StopIntent",
            samples: []
            }];

    /*
    defaultIntents.map(intent=>{
        allIntents.push(intent);
    });
    */

    skill.intents.map(intent=>{
        allIntents.push({name: intent.intentName, samples: intent.questions});
    });

    result.interactionModel = {};

    result.interactionModel.languageModel = {
        invocationName: skill.invocationName,
        intents: allIntents
    };

    return JSON.stringify(result);
}

var uploadSkill = function(skill){
    return fetch(`https://api.amazonalexa.com/v0/skills/${skill.skillID}/interactionModel/locales/en-US`, {
            method: 'POST',
            headers: {
                Authorization: config.TOKEN
            },
                body: generateInteractionModel(skill)
            });
}

module.exports = {
    updateSkill: function(skill, db){
        return new Promise((resolve,reject)=>{
            if (new Date() / 1000 > config.TOKEN_EXPIRES_IN){
                refreshToken(db).then(()=>{
                    uploadSkill(skill).then(response=>{
                        resolve(response.status);
                    });
                }).catch(e=>{
                    reject(e);
                });
            }else{
                uploadSkill(skill).then(response=>{
                    resolve(response.status);
                }).catch(e=>{
                    reject(e);
                })
            }
        });

        
    }
};