// This file establishes conenction to the mongodb. Connection is used by the applicaiton and initialized
// when it loads during starup . This is registered in the root level index.js

// require mongoose module
const fp = require("fastify-plugin");
const db = require("mongoose");
db.set("useFindAndModify", false);
// require clak module to give colors to console text.
var chalk = require("chalk");

const boom = require("boom");

  
// Define colors for db messages on cosole.

var connected = chalk.bold.cyan;
var error = chalk.bold.yellow;
var disconnected = chalk.bold.red;
var termination = chalk.bold.magenta;

// TODO
// Need to read database url from a environment variable.
// const databaseURL = "mongodb://armintatankdbuser:armintatank1@35.207.198.4:27017/arminta-tank-db;
//const databaseURLNew = "mongodb://35.207.198.4:27017/arminta-tank-db";
//const databaseURLNew = "mongodb://35.200.129.165:27017/health-care-db";

const databaseURLNew = "mongodb://127.0.0.1:27017/arminta-tank-db";
// Next line not used , or no need to pass default db in the mongo connection url.
const defaultDatabase = "arminta-tank-db";

//export this function and imported by server.js


async function dbConnection() {
  try {
     db.connect(databaseURLNew, { user: "armintatankdbuser", pass: "armintatank1" , useUnifiedTopology: true, });
    //db.connect(databaseURLNew, { user: "healthcaredbuser01", pass: "healthcare01" , useUnifiedTopology: true, });

    // db.connect(databaseURLNew)
    db.connection.on("connected", function () {
      console.log(
        connected("Mongoose default connection is open to ", databaseURLNew)
      );

     
      
    });

    db.connection.on("error", function (err) {
      console.log(
        error("Mongoose default connection has occured " + err + " error")
      );
    });

    db.connection.on("disconnected", function () {
      console.log(disconnected("Mongoose default connection is disconnected"));
    });

    process.on("SIGINT", function () {
      db.connection.close(function () {
        console.log(
          termination(
            "Mongoose default connection is disconnected due to application termination"
          )
        );
        process.exit(0);
      });
    });
  } catch (err) {
    throw boom.boomify(err);
  }
}



module.exports = fp(dbConnection, { fastify: ">=1.0.0" });