import { Module, Global } from '@nestjs/common';
import { ConfigModule, ConfigService } from '@nestjs/config';
import Redis from 'ioredis';
import { RedisService } from './redis.service';

export const REDIS_CLIENT = Symbol('REDIS_CLIENT');

@Global()
@Module({
  imports: [ConfigModule],
  providers: [
    {
      provide: REDIS_CLIENT,
      useFactory: (configService: ConfigService) => {
        return new Redis({
          host: configService.get('REDIS_HOST', 'localhost'),
          port: configService.get('REDIS_PORT', 6379),
          password: configService.get('REDIS_PASSWORD') || undefined,
          db: configService.get('REDIS_DB', 0),
          retryStrategy: (times) => {
            const delay = Math.min(times * 50, 2000);
            return delay;
          },
          maxRetriesPerRequest: 3,
        });
      },
      inject: [ConfigService],
    },
    RedisService,
  ],
  exports: [RedisService, REDIS_CLIENT],
})
export class RedisModule {}