const encodeUri = require('encodeUri');
const getEventData = require('getEventData');
const log = require('logToConsole');
const sendHttpGet = require('sendHttpGet');
const getRequestHeader = require('getRequestHeader');

const LEFTY_API_BASE = "https://a.lefty.io";
const LEFTY_API_TRACK = LEFTY_API_BASE + "/track";

const emitLeftyConversion = (orderId, amount, currencyCode, products, host, ipAddress, userAgent, eventId) => {
  let uri = "type=conversion";
  uri += "&orderId=" + orderId;
  uri += "&amount=" + amount;
  uri += "&currency=" + currencyCode;
  uri += "&ref=" + host;
  uri += "&ipAddress=" + ipAddress;
  uri += "&userAgent=" + userAgent;
  uri += "&eventId=" + eventId;

  if (products && products.length !== 0) {
    const pIds = products.map((item) => "pId=" + item.id).join("&");
    const pNames = products.map((item) => "pName=" + item.name).join("&");
    const itemQty = products
      .map((item) => "itemQty=" + item.quantity)
      .join("&");
    const itemAmount = products
      .map((item) => "itemAmount=" + item.amount)
      .join("&");

    uri += "&" + pIds;
    uri += "&" + pNames;
    uri += "&" + itemQty;
    uri += "&" + itemAmount;
  }

  const url = LEFTY_API_TRACK + "?" + encodeUri(uri);
  
  sendHttpGet(url).then((result) => {
	  if (result.statusCode >= 200 && result.statusCode < 300) {
	    data.gtmOnSuccess();
	  } else {
	    data.gtmOnFailure();
	  }
	}).catch((error) => {
      log("Error sending HTTP request to Lefty: " + error.message + ". URL: " + url);
      data.gtmOnFailure();
    });
};

const eventName = data.eventName || getEventData('event_name');
if (eventName !== 'lefty_conversion') {
  data.gtmOnFailure();
  return;
}

const host = getRequestHeader('host');

// AUTOMATIC Event Data
const ipAddress = getEventData('ip_override');
const userAgent = getEventData('user_agent');
const eventId = '[[ YOUR_EVENT_ID ]]';

const orderId = getEventData('orderId');
if (!orderId) {
  log("Order ID not found");
  data.gtmOnFailure();
  return;
}

const amount = getEventData('amount');
if (!amount) {
  log("Order amount not found");
  data.gtmOnFailure();
  return;
}

const currencyCode = getEventData('currencyCode');
if (!currencyCode) {
  log("Order currency not found");
  data.gtmOnFailure();
  return;
}
  
const products = getEventData('products') || [];  
  
emitLeftyConversion(
  orderId,
  amount,
  currencyCode,
  products,
  host,
  ipAddress,
  userAgent,
  eventId
);

gtag('event', 'lefty_conversion', {
    orderId: string,
    amount: number,
    // ex: "USD"
    currencyCode: string,
    // products list
    products: [
      {
        id: string,
        name: string,
        quantity: number,
        amount: number,
      },
      {
        id: string,
        name: string,
        quantity: number,
        amount: number,
      },
      {
        id: string,
        name: string,
        quantity: number,
        amount: number,
      },
    ]
});