// Copyright (C) 2025, uvok cheetah
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

import 'package:logger/logger.dart';

Logger fileLogger([String? name]) {
  String fileName = "???";

  if (name == null) {
    final String? callerName = StackTrace.current
        .toString()
        .split('\n')
        .elementAtOrNull(1);
    if (callerName != null) {
      final int start = callerName.indexOf("package:");
      if (start != -1) {
        final int fileNameStart = start + "package:".length;
        final int end = callerName.indexOf(":", fileNameStart);

        if (end != -1 && end > fileNameStart) {
          fileName = callerName.substring(fileNameStart, end);
        }
      }
    }
  } else {
    fileName = name;
  }
  return Logger(printer: FilePrefixPrinter(SimplePrinter(), fileName));
}

class FilePrefixPrinter extends LogPrinter {
  final LogPrinter delegate;
  final String fileName;

  FilePrefixPrinter(this.delegate, this.fileName);

  @override
  List<String> log(LogEvent event) {
    final lines = delegate.log(event);
    return lines.map((line) {
      // ugh..... relying on implementation details...
      var e = line.indexOf("[0m") + 3;
      return '${line.substring(0, e)} [$fileName] ${line.substring(e)}';
    }).toList();
  }
}