'use strict';
const request = require("request");

var token = "RWlzRDNRNG5UNUFXaHhuSkpFSTRhMktlQzdjYTpZWUVKajJtUlF3MmxyeHV2NVo0dXNlbEd5MGth";

var express = require('express');
var router = express.Router();
var apiRequest = {};

router.get('/', function getResponse(req, res, next) {
	"use strict";

	var methodOptions = (req.query.methodOptions) ? JSON.parse(req.query.methodOptions) : {};
	var options = {
		method: (typeof methodOptions.method === "string") ? methodOptions.method.toUpperCase() : 'POST',
		pathname: methodOptions.pathname
	};

	if(typeof methodOptions.pathname !== "string"){
		console.error("Error calling API. No name provided. Which API to call?");
	}

	var data = JSON.parse(req.query.methodData);

	apiRequest.sendRequest(options, data, function (data){
		console.log("sending response back to client. Response is ");
		console.dir(data);
		res.json(data);

	});

});

router.post('/', function postResponse(req, res, next) {
  res.json({'oops': 'Sorry POST response not implemented yet'});
});


/** Call the API.

* @params params Parameters for API (options, name of method to call) plus any Request options (GET/POST)
* @params body
* @params callback
 */
apiRequest.sendRequest = function sendRequest(params, body, callback) {
	"use strict";


	var options = apiRequest.setUpOptions(params, body);

	request(options, function (error, response, responseBody) {
		if (error){
			console.error("Error with API call. Status code = " + response.statusCode, error);
			console.dir(response.responseBody);
			throw new Error(error);
		}


		if(typeof callback ==="function") {
			callback(responseBody);
		}
	});
}

apiRequest.setUpOptions = function setUpOptions(params, body) {
	let options = {
		url : 'https://api.evalueproduction.com' + params.pathname,
		method: params.method || 'POST',
		headers: apiRequest.setUpHeaders(),
		body : body
	};
	if(options.headers['Content-Type'] == "application/json") {
		options.json = true;
	}

	return options;
}

apiRequest.setUpHeaders = function setUpHeaders() {
	const headers = {
		'Content-Type': 'application/json',
		'Authorization': 'Bearer ' + token,
		'Cache-Control': 'no-cache'
	};

	return headers;
}

module.exports = router;