'use strict';

const config = require('config');
const fs = require('fs').promises;
const irc = require('irc-upd');
const logger = require('simple-node-logger').createSimpleLogger();
const { argv } = require('yargs');
// const timers = require('timers/promises');

const style = require('./utils/style');

logger.setLevel(argv.level || 'info');

const points = {};

const client = new irc.Client(config.server, config.user.nick, {
	userName: config.user.username,
	realName: config.user.realName,
	password: config.user.password,
	port: config.port,
	secure: true,
});

async function setPoints(defaultKey, user, value, { mode = 'add', key } = {}) {
	const gameKey = key || defaultKey;

	if (!user) {
		logger.warn(`Failed to set ${gameKey} points for missing user`);
		return;
	}

	const userKey = `${user.id}:${user.username}`;

	if (!points[gameKey]) {
		points[gameKey] = {};
	}

	if (mode === 'add') {
		points[gameKey][userKey] = (points[gameKey][userKey] || 0) + value;
	}

	if (mode === 'set') {
		points[gameKey][userKey] = value;
	}

	await fs.writeFile(`./points-${config.user.nick}.json`, JSON.stringify(points, null, 4));
}

function getPoints(game, rawUsername, { user, room, command }) {
	const username = rawUsername?.replace(new RegExp(`^${config.usernamePrefix}`), '');
	const gamePoints = points[command] || points[game.key];

	const userPoints = username
		? Object.entries(gamePoints || {}).find(([identifier]) => identifier.split(':')[1] === username)?.[1]
		: gamePoints?.[`${user?.id}:${user?.username}`];

	game.sendMessage(`${username ? `${style.bold(username)} has` : 'You have'} scored ${style.bold(userPoints || 0)} points in ${game.name}, ${config.usernamePrefix}${user.username}`, room.id);
}

function getLeaderboard(game, { user, room, command }) {
	const leaderboard = points[command] || points[game.key];

	if (!leaderboard || Object.keys(leaderboard).length === 0) {
		game.sendMessage(`No points scored in ${game.name} yet!`, room.id);

		return;
	}

	const curatedLeaderboard = Object.entries(leaderboard)
		.sort(([, scoreA], [, scoreB]) => scoreB - scoreA)
		.map(([userKey, score]) => {
			const username = userKey.split(':')[1];
			return `${style.bold(`${username === user.username ? config.usernamePrefix : ''}${username}`)} at ${style.bold(score)} points`;
		})
		.slice(0, 10)
		.join(', ');

	game.sendMessage(`The top ${Math.min(Object.keys(leaderboard).length, 10)} ${style.italic(game.name)} players are: ${curatedLeaderboard}`, room.id);
}

function getGames(bot) {
	const games = config.games.reduce((acc, key) => {
		const game = require(`./games/${key.game || key}`); // eslint-disable-line global-require, import/no-dynamic-require

		const sendMessage = (body, roomId, options, recipient) => {
			console.log(roomId || recipient, body);
			client.say(roomId || recipient, body);
		};

		const setGamePoints = (userId, score, options) => setPoints(key, userId, score, options);

		const curatedGame = {
			...game,
			...(key.game && key),
			name: game.name || key,
			key,
			sendMessage,
			setPoints: setGamePoints,
		};

		if (game.onStart) {
			game.onStart({ ...curatedGame, bot });
		}

		return {
			...acc,
			[key]: curatedGame,
			...game.commands?.reduce((commandAcc, command) => ({ ...commandAcc, [command]: curatedGame }), {}),
		};
	}, {});

	return games;
}

function onMessage(message, bot, games) {
	const body = message.originalBody || message.body;
	const [, command, subcommand] = body?.match(new RegExp(`^${config.prefix}(\\w+)(?:\\:(\\w+))?`)) || [];
	// const user = bot.users[message.userId] || message.user;
	const user = { username: message.from, id: message.from };
	const room = { id: message.to, name: message.to };

	if (command) {
		const args = body.split(/\s+/).slice(1);
		const game = games[command];

		if (['leaderboard', 'lead', 'leader', 'leaders', 'scoreboard', 'best'].includes(subcommand) && games[command]) {
			getLeaderboard(games[command], { user, room, command });
			return;
		}

		if (['points', 'score'].includes(subcommand) && games[command]) {
			getPoints(games[command], args[0], { user, room, command });
			return;
		}

		if (game && game.onCommand) {
			if (user) {
				user.points = points[game.key]?.[`${user.id}:${user.username}`] || 0;
			}

			game.onCommand(args, {
				...game,
				command,
				subcommand,
				bot,
				message,
				user,
				room,
				points: points[game.key] || {},
				logger,
			});
		}
	}

	Object.values(games).forEach((game) => game.onMessage?.(message, {
		...game,
		bot,
		message,
		user: user && {
			...user,
			points: points[game.key]?.[`${user.id}:${user.username}`] || 0,
		},
		room,
		logger,
	}));
}

async function init() {
	const bot = {
		rooms: config.channels.map((channel) => ({
			id: channel,
			name: channel,
		})),
	};

	const games = getGames(bot);

	client.addListener('registered', () => {
		logger.info('Connected!');
		logger.info('Identifying with NickServ');

		client.say('nickserv', `IDENTIFY ${config.user.username} ${config.user.password}`);

		config.channels.forEach((channel) => {
			logger.info(`Joining ${channel}`);

			client.join(channel, () => logger.info(`Joined ${channel}`));

			if (config.greeting) {
				client.say(channel, config.greeting);
			}
		});

		client.addListener('message', (from, to, body) => onMessage({
			from,
			to,
			body,
		}, bot, games));

		client.addListener('error', (error) => {
			console.error(error);
		});
	});
}

init();