import 'package:redis/redis.dart';

class Redis {
  final RedisConfig _config;
  Command? _command;

  Redis(this._config);

  static late Redis _redis;

  static Redis getInstance() {
    return _redis;
  }

  static void setInstance(Redis redis) {
    _redis = redis;
  }

  Future<void> connect({reconnect = false}) async {
    if (reconnect) {
      print("尝试重连Redis");
    }
    Future.delayed(Duration(seconds: 1), () async {
      try {
        _command = await RedisConnection().connect(_config.host, _config.port);
        print('Redis Connected successfully!');
        //定时检测是否断开连接
        Future.delayed(Duration(seconds: 1), () async {
          do {
            await Future.delayed(Duration(seconds: 5));
            try {
              var r = await _command!.send_object(["PING"]);
              if (r != "PONG") {
                break;
              }
            } catch (e) {
              //发送数据失败
              try {
                print('Redis Connection check failed: $e');
                _command!.get_connection().close();
              } catch (o) {
                //
              }
              break;
            }
          } while (true);
          connect(reconnect: true);
        });
      } catch (e) {
        print('Redis Connection error: $e');
        connect(reconnect: reconnect);
      }
    });
  }

  Future<bool> set(String key, String value) async {
    var response = await _command?.send_object(["SET", key, value]);
    return response == "OK";
  }

  Future<String?> get(String key) async {
    return await _command?.send_object(["GET", key]);
  }

  Future<bool> delete(String key) async {
    return await _command?.send_object(["DEL", key]) == "OK";
  }

  Future<bool> setWithExpiry(String key, String value, int ttlInSeconds) async {
    var response = await _command
        ?.send_object(["SETEX", key, ttlInSeconds.toString(), value]);
    return response == "OK";
  }
}

class RedisConfig {
  String host;
  int port;

  RedisConfig({
    required this.host,
    this.port = 6379,
  });
}