import { FactoryProvider } from '@nestjs/common';
import { ConfigurationService } from '../config/config.service';
import * as redis from 'redis';

export type Redis = ReturnType<typeof redis.createClient>;

export const redisProviders = [
  {
    provide: 'REDIS_URL',
    useFactory: (config: ConfigurationService) =>
      process.env.REDIS_URL ||
      config.get<string>('app.redis_url') ||
      'redis://localhost:6379',
    inject: [ConfigurationService],
  },
  {
    provide: 'REDIS_CLIENT',
    useFactory: async (url: string): Promise<Redis> => {
      const redisClient = redis.createClient({
        url,
      });

      return redisClient.connect();
    },
    inject: ['REDIS_URL'],
  } as FactoryProvider<Redis>,
];