import "dart:convert";
import "dart:io";

import "package:args/command_runner.dart";

class Day2Command extends Command {
  // The [name] and [description] properties must be defined by every
  // subclass.
  @override
  final name = "day2";

  @override
  final description = "Run Advent of Code 2025 Day 2";

  Day2Command() {
    // we can add command specific arguments here.
    // [argParser] is automatically created by the parent class.
  }

  // [run] may also return a Future.
  @override
  Future<void> run() async {
    // [argResults] is set before [run()] is called and contains the flags/options
    // passed to this command.

    if (argResults!.rest.length != 1) {
      print(
        "Expected 1 positional arguments, found ${argResults!.rest.length}",
      );
    }
    var filePath = argResults!.rest[0];

    print("Parsing file: $filePath");

    var inputFile = File(filePath);
    var openFile = inputFile.openRead();

    var lines = openFile.transform(utf8.decoder).transform(LineSplitter());

    await for (var line in lines) {
      print(line);
      print('-------');
    }
  }
}