import Redis from 'ioredis';
import config from '../../config';
import Logger from '@lib/Logger/Logger';

class _RedisConnection {
    private pool?: Redis
    private logger = new Logger('Redis')

    constructor() {
        if (!config.redis.enable) {
            this.logger.info('Database is disabled, initialization terminated');
            return;
        }

        try {
            this.pool = new Redis({
                port: config.redis.port,
                host: config.redis.host,
                password: config.redis.password,
                maxRetriesPerRequest: 10,
            });
            this.logger.info('Database connection pool created')
        } catch (error) {
            this.logger.error('Failed to create database connection pool: ' + error)
        }
        setTimeout(async () => {
            if (this.pool == undefined)
                return;
            try {
                let res = await this.pool.set('redis_test', '1');
                if (res)
                    this.logger.info('Database test successful')
                else
                    throw new Error('Unexpected return value')
            } catch (error) {
                this.logger.error('Database test failed: ' + error)
            }

        }, 10);
    }

    public getPool(): Redis {
        return <Redis>this.pool;
    }
}

const _redisConnection = new _RedisConnection();
const RedisConnection = _redisConnection.getPool();
export default RedisConnection;
export type { Redis };