namespace AdventCommon
{
    public class PuzzleInput
    {
        public PuzzleInput(string fileName, bool ignoreEmptyLines = true)
        {
            using (StreamReader reader = System.IO.File.OpenText(fileName))
            {
                while (!reader.EndOfStream)
                {
                    string? line = reader.ReadLine();

                    if (line == null) { throw new InvalidDataException(); }
                    if (ignoreEmptyLines && String.IsNullOrWhiteSpace(line)) continue;

                    Lines.Add(line);
                }
            }
        }

        public List<string> Lines { get; private set; } = new List<string>();

        public void Print()
        {
            for (int j = 0; j < Lines.Count; j++)
            {
                for (int i = 0; i < Lines[j].Length; i++)
                {
                    Console.Write(Lines[j][i]);
                }
                Console.WriteLine();
            }
        }
    }
}