var Client = require('./lib/Client.js');

global.createMPPbridge = async function createMPPbridge({room, channel, uri}) {
	channel = dClient.channels.resolve(channel);
	var webhooks = await channel.fetchWebhooks();
	var webhook = webhooks.filter(w => w.token).first() || await channel.createWebhook("sdfadffg");	

	{ // discord message sending
		let msgBuffer = [];
		function _dSend(options) {
			
			if (options.content.length > 2000) {
				options.attachments ||= [];
				options.attachments.push(new Discord.MessageAttachment(Buffer.from(options.content), "message.txt"));
				delete options.content;
			}

			let username = gClient.channel && gClient.channel._id || room;
			if (username.length > 80) username = username.substr(0,79) + '…';

			webhook.send(Object.assign(options, {username})).catch(error => {
				handleError(error, `webhook fail in ${channel.id}`);
				channel.send(options).catch(error => handleError(error, `send fail in ${channel.id} after webhook send fail`));
			});

		}
		function dSend(msg, options) {
			if (arguments.length == 1) options = msg;
			else {
				options ||= {};
				options.content = msg;
			}
			msgBuffer.push(options);
		}
		setInterval(()=>{
			if (msgBuffer.length == 0) return;
			_dSend(msgBuffer.join('\n'));
			msgBuffer = [];
		}, 3000);
	}
	
	const gClient = new Client(uri);
	if (uri == "wss://mppclone.com:8443") gClient.token = config.mpc_token; //todo hmm
	gClient.setChannel(room, {visible:false});
	gClient.start();

	// maintain the client's presence in the channel
	gClient.channelCorrectorInterval = setInterval(()=>{
		// if client is connected and not in a channel (meaning setChannel failed due to ratelimit because another client joined a channel with the same user within the last second) OR client is in a channel but it is not the right channel…
		if ((gClient.isConnected() && !gClient.channel) || (gClient.channel && gClient.channel._id != room)) 
			// …set the channel!
			gClient.setChannel(room, {visible:false}); 
	}, 1000);

	let lastError;
	gClient.on("error", error => {
		handleError(error, `[${uri}][${room}]`);
		error = error.toString();
		if (lastError != error) {
			dSend(`**${error.toString()}**`);
			lastError = error;
		}
	});
	var isConnected = false; // TODO use gClient.isConnected() ?
	gClient.on('connect', () => {
		console.log(`[${uri}][${room}] Connected to server`);
		dSend(`**Connected to server; joining channel…**`);
		isConnected = true;
		lastError = undefined;
	});
	gClient.on('hi', ()=>{
		console.log(`[${uri}][${room}] Received greeting`);
		if (!testmode) {
			gClient.sendArray([{m: "userset", set: {name: config.mppname }}]);
		}
		gClient.sendArray([{m:'m',x:Math.floor(Math.random()*100),y:Math.floor(Math.random()*100)}])
	});
	gClient.on('disconnect', () => {
		if (isConnected) {
			console.log(`[${uri}][${room}] Disconnected from server`);
			dSend(`**Disconnected from server**`);
			isConnected = false;
		}
	});
	/*gClient.on('status', status => {
		console.log(`[${uri}] [${room}] ${status}`);
	});*/
		


	// on channel change
	{
		let lastCh;
		gClient.on('ch', async msg => {
			// announce channel join
			if (!lastCh) {
				dSend(`**Joined channel \`${msg.ch._id}\`**`);
				console.log(`[${uri}][${room}] Joined channel ${msg.ch._id}`);
			}
			// announce channel change
			else if (msg.ch._id !== lastCh) {
				dSend(`**Channel changed from \`${lastCh}\` to \`${msg.ch._id}\`**`);
				console.log(`[${uri}][${room}] Channel changed from ${lastCh} to ${msg.ch._id}`);
			}
			lastCh = msg.ch._id;

		});
		gClient.on("disconnect", () => lastCh = undefined);
	}
	

	// MPP to Discord
	gClient.on('a', async msg => {
		if (msg.p._id == gClient.getOwnParticipant()._id) return;
		var id = msg.p._id.substr(0,6);
		var name = sanitizeName(msg.p.name);
		var content = escapeDiscordMentions(msg.a);
		var str = `\`${id}\` **${name}:** ${content}`;
		dSend(str);
	});

	// Discord to MPP
	{
		let msgQueue = [];
		dClient.on('message', async message => {
			if (message.channel.id !== channel.id || message.author.id == dClient.user.id || !message.member /*|| message.content.startsWith('!')*/) return;
			var str = message.cleanContent;
			var aname = `${message.member.displayName}#${message.member.user.discriminator}`;
			if (str.startsWith('/') || str.startsWith('\\')) 
				msgQueue.push(`⤹ ${aname}`);	
			else
				str = `${aname}: ${str}`;
			if (str.startsWith('\\')) str = str.slice(1);
			if (message.attachments.first()) str += ' '+message.attachments.first().url;
			if (str.length > 512) str = str.substr(0,511) + '…';
			msgQueue.push(str);
		});
		setInterval(()=>{
			let message = msgQueue.shift();
			if (message) gClient.sendArray([{m:'a', message}]);
		}, 1600); // just about fastest without exceeding quota; I figured quota is 4 messages per 6 seconds in lobbies
	}




	// announce join/leave/rename
	gClient.prependListener("p", async participant => {
	    if (gClient.ppl[participant.id]) { // is update
	        let oldName = gClient.ppl[participant.id].name, newName = participant.name;
	        if (newName != oldName)
	            dSend(`\`${participant._id.substr(0,6)}\` ___**${sanitizeName(oldName)}** changed their name to **${sanitizeName(newName)}**___`);
	    } else { // is join
	        dSend(`\`${participant._id.substr(0,6)}\` ___**${sanitizeName(participant.name)}** entered the room.___`);
	    }
	});
	gClient.prependListener("bye", async msg => {
	    var participant = gClient.ppl[msg.p];
        dSend(`\`${participant._id.substr(0,6)}\` ___**${sanitizeName(participant.name)}** left the room.___`);
    });



	// on notifications
	gClient.on('notification', async msg => {
		// show notification
		dSend({embeds:[{
			title: msg.title,
			description: msg.text || msg.html
		}]});

		// handle bans
		if (msg.text && (msg.text.startsWith('Banned from "'+room+'"') || msg.text.startsWith('Currently banned from "'+room+'"'))) {
            // Banned from "{room}" for {n} minutes.
            // Currently banned from "{room}" for {n} minutes.
			let arr = msg.text.split(' ');
			arr.pop();
			let minutes = arr.pop();

			gClient.stop();
			setTimeout(()=>{
				gClient.setChannel(room);
				gClient.start();
			}, minutes*60*1000+3000);
			dSend(`**Attempting to rejoin in ${minutes} minutes.**`);
		}
	});

	// make room invisible when nobody else is in it
	gClient.on("ch", async function(msg){
		if (gClient.isOwner()) {
			if (gClient.countParticipants() <= 1) {
				gClient.sendArray([{m:'chset', set: { visible: false }}])	
			} else {
				gClient.sendArray([{m:'chset', set: { visible: true }}])	
			}
		}
	});
	
	
    
	// addons
	{
		// record raw data
		let createWSMessageCollector = require("./datacollector")
		gClient.on("message", createWSMessageCollector(async function(data, startDate, endDate){
			var attachmentName = `${uri} ${room} raw data recording from ${startDate.toISOString()} to ${endDate.toISOString()} .txt.gz`;
			await channel.send(new Discord.MessageAttachment(data, attachmentName));
		}));
	}

	return gClient;
};



// start
(async function () {
	global.bridges = require("./bridges");
	for (let bridge of bridges) {
		try {
			bridge.client = await createMPPbridge(bridge);
		} catch(e) {
			handleError(error, JSON.stringify(bridge));
		}
	}
})();