/**
 * I was able to get xmysql to work on AWS lambda. This is just some docs on the process to help others.
 * AWS setup notes:
 * * The deploy uses serverless: https://serverless.com/framework/docs/getting-started/
 * * The lambda function is accessed through API Gateway and access the RDS (mysql) database
 * ** Make sure you deploy your API Gateway setup otherwise it won't be accessible.
 * * The security setup:
 * ** You need to put your lambda in a VPC
 * ** The lambda role needs access to the VPC
 * ** The RDS server has to be inside the VPC as well
*
 * Performance:
 * * Requests to the API Gateway resolve in ~ 90ms
 *
 * Extra packages needed:
 * * serverless-http
 *
 * More info on deploying this to lambda:
 * * https://serverless.com/blog/serverless-express-rest-api/
 */

"use strict";
Object.defineProperty(exports, "__esModule", {value: true});
var bodyParser = require("body-parser");
var express = require("express");
var serverless = require('serverless-http');
var cors = require("cors");
var mysql = require('mysql');
var Xapi = require('./node_modules/xmysql/lib/xapi.js');
var morgan = require('morgan');
var app = express();

var onXapiInitialized = new Promise(function (resolve, reject) {
    try {
        // /**************** START : setup express ****************/
        app.use(morgan('tiny'));
        app.use(cors());
        app.use(bodyParser.json());
        app.use(bodyParser.urlencoded({
            extended: true
        }));
        // /**************** END : setup express ****************/

        app.use(function (req, res, next) {
            // You can add authentication here
            console.log('Received request for: ' + req.url, req);
            next();
        });

        var mysqlConfig = {
            host: config.mysql.host,
            port: 3306,
            database: config.mysql.database,
            user: config.mysql.user,
            password: config.mysql.password,
            apiPrefix: '/',
            ipAddress: 'localhost',
            portNumber: 3000,
            ignoreTables: [],
            storageFolder: __dirname
        };

        var mysqlPool = mysql.createPool(mysqlConfig);
        var xapi = new Xapi(mysqlConfig, mysqlPool, app);
        xapi.init(function (err, results) {
            app.listen(3000);
            resolve();
        });
    }
    catch (err) {
        reject(err);
    }
});

function handler(event, context, callback) {
    onXapiInitialized.then(function () {
        serverless(app)(event, context, callback);
    });
}

exports.handler = handler;