'use strict';

const config = require('config');
const { intervalToDuration } = require('date-fns');

const style = require('../utils/style');
const pickRandom = require('../utils/pick-random');

const ducks = new Map();
let shots = new Map();

function launchDuck(context) {
	ducks.delete(context.room?.id);
	shots = new Map();

	const interval = Array.isArray(config.duck.interval)
		? ((Math.random() * (config.duck.interval[1] - config.duck.interval[0])) + config.duck.interval[0]) * 1000
		: config.duck.interval * 1000;

	setTimeout(() => {
		if (context.bot.rooms.length === 0) {
			return;
		}

		const rooms = Object.values(context.bot.rooms);
		const room = rooms[Math.floor(Math.random() * rooms.length)];

		ducks.set(room.id, new Date());
		context.sendMessage(`Quack! ${config.duck.duck}`, room.id);
	}, interval);
}

function onCommand(args, context) {
	const duck = ducks.get(context.room.id);

	if (!duck && ['bang', 'shoot'].includes(context.command)) {
		const message = pickRandom([
			`There is no duck, what are you shooting at, ${context.user.prefixedUsername}?!`,
			`You're wasting bullets, ${context.user.prefixedUsername}, there is no duck!`,
			`The only quack is you, ${context.user.prefixedUsername}...`,
		]);

		context.sendMessage(message, context.room.id);

		return;
	}

	if (!duck && ['befriend', 'bef'].includes(context.command)) {
		const message = pickRandom([
			`You're trying to befriend a non-existent duck, ${context.user.prefixedUsername}...`,
			`There aren't any ducks to befriend, ${context.user.prefixedUsername}...`,
			`That's no duck, ${context.user.prefixedUsername}  ✈️`,
		]);

		context.sendMessage(message, context.room.id);
		return;
	}

	const hit = Math.random() > config.duck.missRatio;
	const time = new Date().getTime() - duck.getTime();

	const distance = time < 60 * 1000 // show digits up to one minute
		? `${(time / 1000).toFixed(3)} seconds`
		: `${Object.entries(intervalToDuration({ start: duck, end: new Date() }))
			.filter(([, value]) => value > 0)
			.map(([key, value]) => `${value} ${key}`)
			.join(', ')} and ${time % 1000} milliseconds`;

	if (['bang', 'shoot'].includes(context.command)) {
		if (hit) {
			context.sendMessage(`${context.user.prefixedUsername}: You shot a duck in ${style.bold(style.red(distance))}`, context.room.id);
			launchDuck(context);

			context.setPoints(context.user, 1, { key: 'bang' });

			return;
		}

		const message = pickRandom([
			`How could you miss ${style.italic('that')}, ${context.user.prefixedUsername}...?!`,
			`That's a miss! Better luck next time, ${context.user.prefixedUsername}.`,
			`The duck outsmarted you, ${context.user.prefixedUsername}`,
			`Channeling Gareth Southgate, ${context.user.prefixedUsername}? You missed!`,
			`Oh, and that's a bad miss, ${context.user.prefixedUsername}.`,
		]);

		shots.set(context.user.id, new Date());
		context.sendMessage(message, context.room.id);

		return;
	}

	if (['bef', 'befriend'].includes(context.command)) {
		if (hit) {
			context.sendMessage(`${context.user.prefixedUsername}: You befriended a duck in ${style.bold(style.sky(distance))}`, context.room.id);
			launchDuck(context);

			context.setPoints(context.user, 1, { key: 'befriend' });

			return;
		}

		const message = pickRandom([
			`The duck does not want to be your friend right now, ${context.user.prefixedUsername}`,
			`The duck would like some time for itself, ${context.user.prefixedUsername}`,
			`The duck isn't in the mood right now, ${context.user.prefixedUsername}`,
		]);

		shots.set(context.user.id, new Date());
		context.sendMessage(message, context.room.id);
	}
}

module.exports = {
	name: 'Duck',
	commands: ['bang', 'shoot', 'bef', 'befriend'],
	help: `There are ducks on the loose! When you see one, you can be nice and ${config.prefix}befriend them, or... ${config.prefix}bang`,
	onStart: launchDuck,
	onCommand,
};