#!/usr/bin/env node

/*

	Copyright (c) 2020, 2023, The Unified Company.

	This code is part of Unify.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the ESA Software Community License - Strong Copyleft LICENSE,
	as published by the ESA.
	See the ESA Software Community License - Strong Copyleft LICENSE, for more details.

	https://unifyjs.org 

*/

import fs 						from 'fs';

import path 					from 'path';

import cluster 					from 'cluster';

import os 						from 'os';

//import express 					from 'express';

import https 					from 'https';

import util 					from 'util';

import serverManager			from './serverManager.js';

import applicationManager		from './applicationManager.js';

import tools	 				from '../unify/tools.js';

import moduleLoader 			from '../server/moduleLoader.js';

//import syncClient 				from '../sync/syncClient.js';

import user						from '../cache/server/user/user.js';

import sqlite3					from '../node_modules/better-sqlite3/lib/index.js';

import fileList 				from '../configs/files.js';

import database                 from '../server/database.js';

import serverOptions 			from '../configs/config.js';

import colors	 				from '../unify/consoleColors.js';

//import objectSizeof				from "object-sizeof";

//import cacheManager 				from './scripts/cacheManager.js';

class unifyServer{

	workers		= new Array();

	defineGlobals( clusterID ) {

		if( clusterID ){

			global.clusterID 			= cluster.worker.id;

		}

		global.maxSocketBufferSize	= 3000;

		global.mode 				= serverOptions.mode;

		global.socketPort 			= serverOptions.socketPort;

		global.ssl					= serverOptions.ssl;

		global.useSyncServer 		= serverOptions.useSyncServer;

		global.os					= tools.CamelCase( serverOptions.os );

		global.device				= tools.CamelCase( serverOptions.device );

		global.tint					= tools.CamelCase( serverOptions.tint );

		global.database 			= database;

		global.path					= path;

		global.user 				= user;

		global.util 				= util;

		global.sockets 				= new Array();

		global.path					= path;

		//global.objectSizeof			= objectSizeof;


		if( !global.__dirname ) {

			global.__dirname 		= path.resolve();

		}

		if( !global.extendMap ) {

			global.extendMap = new Array();

		}


		if( serverOptions.useSyncServer ) {

			global.syncClient						= new syncClient();

			global.syncClient.clusterClientID		= serverOptions.syncClientID;

			global.syncClient.syncServerAddress		= serverOptions.syncServerAddress;

		}

	}

	createServer() {

		var server 			= new serverManager();

		if( process.platform != "android" ) {

			server.port				= serverOptions.port;
			
			server.ssl				= serverOptions.ssl;

			server.mode				= serverOptions.mode;

			server.serverAddress	= serverOptions.serverAddress;


			//server.createExpressApp();

			server.setupServer();

			server.createHttpsServer();

			server.createListener();

		}

		return server.httpsServer;

	}

	createProcessListeners() {

		process.on("SIGTERM", (signal) => {

			console.log(`Process ${process.pid} received a SIGTERM signal`);

			if( global.syncClient ) {

				global.syncClient.emptyTable();
			
			}

			process.exit(0);

		});

		process.on("SIGINT", (signal) => {

			console.log(`Process ${process.pid} has been interrupted`);

			if( global.useSyncServer && global.syncClient ) {

				global.syncClient.emptyTable();

			}
			
			process.exit(0);
			
		});

		process.on('uncaughtException', function (err) {

			console.error( err );

		});

	}

	logServer( serverOptions ) {

		if( global.clusterID == 1 ) {

			if( serverOptions.ssl ) {

				console.log( "\nHttps WebServer started on port:	443" );

			} else {

				console.log( "\nHttps WebServer started on port:	", serverOptions.port );
			}

		}

	}

	async start( clusterID ) {

		this.defineGlobals( clusterID );

		this.createProcessListeners();


		var httpsServer						= this.createServer();

		var applications 					= new applicationManager();

		applications.defaultSocketPort 		= serverOptions.socketPort;

		applications.httpsServer 			= httpsServer;


		await applications.runApplications( fileList  ); //files.applications

		this.logServer( serverOptions );

	}

	async processFiles() {

		var numCPUS 	= os.cpus().length;

		console.log("cpu cores detected:			", os.cpus().length );

		if( serverOptions.maxClusters ) {

			console.log( "but max number of clusters set to:	", serverOptions.maxClusters );

			var numberOfClusters  = serverOptions.maxClusters;

		} else {

			console.log( "maxClusters is not set." );

			var numberOfClusters  = numCPUS;

		}

		console.log("Sync client loaded");

		console.log("Loading					", numberOfClusters, "Cluster(s).");

		console.log("");

		console.log("platform detected: 			", process.platform);


		if( process.platform == "android" ) {

			this.start( 0 );

		} else {

			for (var i = 0; i < numberOfClusters; i++) {

				this.spawnCluster();

			}

		}

	}

	spawnCluster() {

		var newCluster	= cluster.fork();

		this.workers.push( newCluster );

	}

	setupClusters() {

		if( cluster.isMaster ) {

			var that = this;

			cluster.on("disconnect", function( worker ) { 

				console.log("Cluster disconnected, start new cluster.");

				that.spawnCluster();

			});

			this.processFiles();

		} else {

			console.log( "starting cluster:			", cluster.worker.id );

			this.start( cluster.worker.id );

		}

	}

}


//var cache		= new cacheManager();

//await cache.start();

var server 		= new unifyServer();

server.setupClusters();


export default {};