import { Inject, Injectable } from '@nestjs/common';
import { Redis } from 'ioredis';
import { IRedisClient } from './IRedisClient';

@Injectable()
export class RedisClientAdapter implements IRedisClient {
  constructor(
    @Inject('REDIS_CLIENT')
    private readonly redis: Redis,
  ) {}

  async get<T>(key: string): Promise<T | null> {
    const data = await this.redis.get(key);
    if (!data) return null;

    try {
      return JSON.parse(data);
    } catch (_error) {
      // If it's not valid JSON, return the raw string value
      return data as T;
    }
  }

  async set<T>(key: string, value: T, ttlSeconds = 300): Promise<void> {
    await this.redis.set(key, JSON.stringify(value), 'EX', ttlSeconds);
  }

  async del(key: string): Promise<void>;
  async del(...keys: string[]): Promise<void>;
  async del(keyOrKeys: string | string[]): Promise<void> {
    if (Array.isArray(keyOrKeys)) {
      await this.redis.del(...keyOrKeys);
    } else {
      await this.redis.del(keyOrKeys);
    }
  }

  async keys(pattern: string): Promise<string[]> {
    return this.redis.keys(pattern);
  }

  async ttl(key: string): Promise<number> {
    return this.redis.ttl(key);
  }

  async eval(
    script: string,
    numKeys: number,
    ...keysAndArgs: (string | number)[]
  ): Promise<any> {
    return this.redis.eval(script, numKeys, ...keysAndArgs);
  }
}