import { overrideConsole } from 'nodejs-better-console';
import createFastify from 'fastify';
import Eris from 'eris';

import {
    webPort,
    webRequestInterval,
    botToken,
    botWhitelist
} from './config.js';

overrideConsole();

const
    fastify = createFastify(),
    eris = new Eris(
        botToken,
        { intents: ['directMessages'] }
    );

let
    url,
    nextRequestTimestamp,
    nextRequestTimeout;

fastify.get(
    '/',
    async (
        request,
        reply
    ) => {
        reply.send(url);
        url = '';
        nextRequestTimestamp = Date.now() + webRequestInterval;
        clearTimeout(nextRequestTimeout);
        nextRequestTimeout = setTimeout(
            async () => {
                await eris.editStatus('idle');
            },
            webRequestInterval
        );
        await eris.editStatus('online');
    }
);

eris.on(
    'messageCreate',
    async ({
        guildID,
        author: { id: authorID },
        channel: { id: channelID },
        id: messageID,
        content
    }) => {
        if(
            guildID
            ||
            !botWhitelist.includes(authorID)
        ) return;
        const reply = content => eris.createMessage(
            channelID,
            {
                content,
                messageReference: { messageID }
            }
        );
        if(content){
            try {
                new URL(content);
                url = content;
                await reply(
                    nextRequestTimestamp && nextRequestTimestamp > Date.now()
                        ? `ETA: ${Math.ceil((nextRequestTimestamp - Date.now()) / 1000)} seconds.`
                        : 'ETA: as soon as online.'
                );
            }
            catch {
                await reply('Invalid URL');
            }
        }
    }
);

(async () => {
    await fastify.listen({ port: webPort });
    await Promise.all([
        eris.connect(),
        new Promise(resolve => eris.once('ready', resolve))
    ]);
    await eris.editStatus('idle');
    console.log('Ready');
})().catch(error => console.error(error));