const config = require('./config');

const Redis = require('redis');
const redis = {};

redis.client = Redis.createClient({
    url: `redis://default@${config.REDIS_HOST}:${config.REDIS_PORT}`
});

redis.connect = async () => {
    await redis.client.connect().catch(console.error);
}

redis.quit = async () => {
    await redis.client.quit();
}

redis.ensureGroup = async (stream, group) => {
    await redis.connect();

    try {
        await redis.client.xGroupCreate(stream, group, "0", {MKSTREAM: true});

        console.log(`Created consumer group: ${group} (${stream})`);
    } catch (err) {
        if (err) {
            if (err.message.includes('BUSYGROUP')) {
                console.log(`Consumer group already exists: ${group} (${stream})`);
            } else {
                console.error(err);
            }
        }
    }
}

module.exports = {
    redis
}