import 'package:dart_framework/core/isolate_manager.dart';
import 'package:dart_framework/io/log_writer_base.dart';
import 'package:dart_framework/utils/string_util.dart';

void log(String message) {
  _logSend(message, LogType.verbose);
}

void logWarning(String message) {
  _logSend(message, LogType.warning);
}

void logError(String message) {
  _logSend(message, LogType.error);
}

void _logSend(String message, LogType type) {
  var item = LogItem(message, type);
  Log.to.append(item);
}

enum LogType { verbose, error, warning }

class LogItem {
  late String message;
  late String date;
  late LogType type;

  LogItem(this.message, this.type) {
    date = getDates();
  }
  @override
  String toString() {
    return '[$date][${type.name}] $message';
  }
}

class Log {
  int index = 0;
  StringBuffer buffer = StringBuffer();
  Log._privateConstructor() {
    LogWriterBase.start(_onWriterEvent);
  }
  static final Log _instance = Log._privateConstructor();
  static Log get to => _instance;

  final List<LogItem> logs = [];

  Log() {
    LogWriterBase.start(_onWriterEvent);
  }

  void _onWriterEvent(IsoMessege message) {
    if (message.type == 'request') {
      if (index != logs.length) {
        for (int i = logs.length - index - 1; i >= 0; --i) {
          buffer.writeln(logs[i].toString());
        }
        index = logs.length;
        LogWriterBase.write(buffer.toString());
        buffer.clear();
      }
    }
  }

  void append(LogItem item) {
    logs.insert(0, item);
  }

  void clear() {
    logs.clear();
    index = 0;
    log('Log Restarted.');
  }
}