var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var http = require('http');

const fs = require('fs');
require('dotenv').config();
const { RSSController } = require("./controllers/rssController");
const libUtils = require("./libUtils");
const deployCommands = require("./utilities/deployCommands");

const { DebugBuilder } = require("./utilities/debugBuilder");
const log = new DebugBuilder("server", "index");

//const Discord = require('discord.js');Client, Collection, Intents
const {
	Client,
	Events,
	Collection,
	GatewayIntentBits,
	MessageActionRow,
	MessageButton
} = require('discord.js');
//const client = new Discord.Client();

const client = new Client({
	intents: [GatewayIntentBits.GuildMessages, GatewayIntentBits.Guilds]
});

prefix = process.env.PREFIX 
discordToken = process.env.TOKEN;
rssTimeoutValue = process.env.RSS_TIMEOUT_VALUE ?? 300000;

var indexRouter = require('./routes/index');
var nodesRouter = require('./routes/nodes');
var adminRouter = require('./routes/admin');

// HTTP Server Config
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

// Web Interface
app.use('/', indexRouter);

// Nodes API
app.use('/nodes', nodesRouter);

// Admin API
app.use('/admin', adminRouter);

// catch 404 and forward to error handler
app.use((req, res, next) => {
  next(createError(404));
});

var port = libUtils.normalizePort(process.env.HTTP_PORT || '3000');
app.set('port', port);

// error handler
app.use((err, req, res, next) => {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

/**
 * Start the HTTP background server
 */
async function runHTTPServer() {
	var server = http.createServer(app);
	server.listen(port);

	server.on('error', libUtils.onError);

	server.on('listening', () => {
		log.INFO("HTTP server started!");		
	})
}

/**
 * Start the RSS background process
 */
async function runRssService() {
	const rssController = new RSSController(client);
	rssController.start();
}

// Discord bot config

// Setup commands for the Discord bot
client.commands = new Collection();
const commandsPath = path.join(__dirname, 'commands');
const commandFiles = fs.readdirSync(commandsPath).filter(file => file.endsWith('.js'));
//const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));
for (const file of commandFiles) {
	const filePath = path.join(commandsPath, file);
	const command = require(filePath);	
	log.DEBUG("Importing command: ", command.data.name);
	// Set a new item in the Collection
	// With the key as the command name and the value as the exported module
	client.commands.set(command.data.name, command);
}

// Run when the bot is ready
client.on('ready', () => {	
	log.DEBUG(`Discord server up and running with client: ${client.user.tag}`);
	log.INFO(`Logged in as ${client.user.tag}!`);

	// Deploy slash commands
	log.DEBUG("Deploying slash commands");	
	deployCommands.deploy(client.user.id, client.guilds.cache.map(guild => guild.id));	

	log.DEBUG(`Starting HTTP Server`);
	runHTTPServer();

	log.DEBUG("Starting RSS watcher");
	runRssService();
});

// Setup any additional event handlers
const eventsPath = path.join(__dirname, 'events');
const eventFiles = fs.readdirSync(eventsPath).filter(file => file.endsWith('.js'));

for (const file of eventFiles) {
	const filePath = path.join(eventsPath, file);
	const event = require(filePath);
	if (event.once) {
		client.once(event.name, (...args) => event.execute(...args));
	} else {
		client.on(event.name, (...args) => event.execute(...args));
	}
}

client.login(discordToken); //Load Client Discord Token