//import java.io.BufferedReader;
//import java.io.FileReader;
//import java.io.StringReader;
//
//public class TrebuchetPartOne {
//  public static void main(String[] args) {
//    String str = """
//        1abc2
//        pqr3stu8vwx
//        a1b2c3d4e5f
//
//        treb7uchet
//              """;
//
//    try {
//      String line;
//      int total = 0;
//      // BufferedReader br = new BufferedReader(new StringReader(str));
//      BufferedReader br = new BufferedReader(new FileReader("/home/ilyes/AdventOfCode/Trebuchet/snowyCoordinates.txt"));
//      while ((line = br.readLine()) != null) {
//        if (line.trim().isEmpty()) {
//          continue;
//        }
//        int first = -1;
//        int last = -1;
//        for (String s : line.split("")) {
//          if (Character.isDigit(s.charAt(0))) {
//            if (first == -1) {
//              first = Integer.parseInt(s);
//            }
//            last = Integer.parseInt(s);
//          }
//        }
//        first = first * 10;
//        total += first + last;
//      }
//      System.out.println(total);
//      br.close();
//    } catch (Exception e) {
//      // TODO: handle exception
//    }
//  }
//}
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class TrebuchetPartOne {
  public static void main(String[] args) {
    String filePath = "/home/ilyes/AdventOfCode/Trebuchet/snowyCoordinates.txt";

    try {
      int total = Files.lines(Paths.get(filePath))
          .filter(line -> !line.trim().isEmpty())
          .mapToInt(TrebuchetPartOne::calculateCalibrationValue)
          .sum();

      System.out.println("Total calibration value: " + total);
    } catch (IOException e) {
      System.err.println("Error reading file: " + e.getMessage());
    }
  }

  private static int calculateCalibrationValue(String line) {
    int first = -1;
    int last = -1;

    for (char c : line.toCharArray()) {
      if (Character.isDigit(c)) {
        last = Character.getNumericValue(c);
        if (first == -1) {
          first = last;
        }
      }
    }

    return (first != -1) ? first * 10 + last : 0;
  }
}