const crypto = require('crypto');
const axios = require('axios');

const credentials = require('./secret').credentials;

const ACCOUNT_ID = '12345_SB1';
const CONSUMER_KEY = credentials.CONSUMER_KEY;
const CONSUMER_SECRET = credentials.CONSUMER_SECRET;
const TOKEN = credentials.TOKEN;
const TOKEN_SECRET = credentials.TOKEN_SECRET;

const timestamp = Math.floor(Date.now() / 1000);
const nonce = (() => {

    let nonce = ''
    const alphaNum = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    for (let index = 20; index > 0; index--) {
        nonce += alphaNum.charAt(Math.floor(Math.random() * alphaNum.length));
    }
    return nonce;
})();

console.log('timestamp:: ' + timestamp);
console.log('nonce:: ' + nonce);

const SIGNATURE_METHOD = 'HMAC-SHA256';
const urlParams = {
    limit: 5,
};
const reqParams = {
    ...{
        oauth_consumer_key: CONSUMER_KEY,
        oauth_nonce: nonce,
        oauth_signature_method: SIGNATURE_METHOD,
        oauth_timestamp: timestamp,
        oauth_token: TOKEN,
        oauth_version: '1.0'
    },
    ...urlParams
};

const encodeRFC3986URIComponent = (str) => {
    return encodeURIComponent(str).replace(/[!'()*]/g, (c) => `%${c.charCodeAt(0).toString(16).toUpperCase()}`,);
}

const METHOD = 'GET';
const baseString = ((METHOD, url, reqParams) => {

    let strReqParams = '';
    const arrReqParamKeys = Object.keys(reqParams).sort();
    for (let index = 0; index < arrReqParamKeys.length; index++) {

        const name = arrReqParamKeys[index];
        const value = reqParams[name];

        if (index < arrReqParamKeys.length - 1) {
            strReqParams += name + '=' + value + '&';
        } else {
            strReqParams += name + '=' + value;
        }
    }
    return METHOD + '&' + encodeRFC3986URIComponent(url) + '&' + encodeRFC3986URIComponent(strReqParams);
})(METHOD, '<https://12345-sb1.suitetalk.api.netsuite.com/services/rest/record/v1/salesOrder>', reqParams);

const key = encodeRFC3986URIComponent(CONSUMER_SECRET) + '&' + encodeRFC3986URIComponent(TOKEN_SECRET);
console.log('\nbaseString:: ' + baseString);

const signature = crypto.createHmac('sha256', key)
    .update(baseString)
    .digest('base64');
console.log('\nsignature:: ' + signature);

axios.get('<https://12345-sb1.suitetalk.api.netsuite.com/services/rest/record/v1/salesOrder?limit=5>',
    {
        headers: {
            Authorization: `OAuth realm="${ACCOUNT_ID}",oauth_consumer_key="${CONSUMER_KEY}",oauth_token="${TOKEN}",oauth_signature_method="${SIGNATURE_METHOD}",oauth_timestamp="${timestamp}",oauth_nonce="${nonce}",oauth_version="1.0",oauth_signature="${signature}"`,
            Accept: '*/*',
            "Cache-Control": "no-cache",
            Connection: "keep-alive"
        }
    }
).then(response => {
    console.log(response.data);
}).catch(error => {
    console.log(error);
});