import 'dart:convert';
import 'dart:io';

import 'package:EasyDartModule/base/logger/Logger.dart';
import 'package:dio/dio.dart';

enum LoggerLevel {
  debug(1),
  info(2),
  warning(3),
  error(4),
  off(5),
  ;

  final int level;
  const LoggerLevel(this.level);
}

class LokiLogger implements Logger {
  final LoggerConfig? _config;
  final Dio dio;
  LoggerLevel level = LoggerLevel.info;
  LokiLogger(this._config)
      : dio = Dio(BaseOptions(
            baseUrl: _config == null ? "" : _config.host,
            headers: {
              "Content-Type": "application/json",
              "Content-Encoding": "gzip"
            }));

  @override
  void info(String msg, {String? tag}) {
    log(msg, level: LoggerLevel.info, tag: tag);
  }

  @override
  void warning(String msg, {String? tag}) {
    log(msg, level: LoggerLevel.warning, tag: tag);
  }

  @override
  void error(String msg, {String? tag}) {
    log(msg, level: LoggerLevel.error, tag: tag);
  }

  void log(String msg, {required LoggerLevel level, String? tag}) {
    if (level.level < this.level.level) {
      //日志等级小于设置的输出日志等级
      return;
    }
    if (_config == null) {
      print("$tag $level $msg");
    } else {
      //推送到loki服务器
      //{_config.url}
      var now = DateTime.now();
      // 转换为纳秒
      int nanoseconds = now.microsecondsSinceEpoch * 1000;
      var zip = gzip.encode(utf8.encode(jsonEncode({
        "streams": [
          {
            "stream": {"service_name": _config.serviceName},
            "values": [
              [nanoseconds.toString(), "$tag ${level.name.toUpperCase()} $msg"]
            ]
          }
        ]
      })));
      dio.post("/loki/api/v1/push", data: zip);
    }
  }
}