gistfile1.txt

# frozen_string_literal: true

require_relative 'advent_helper'

# AoC 2022, day 6
class Day6
  include AdventHelper # For #file_to_array

  attr_reader :input_file

  def initialize(input_file = 'day6.input', move_type: :multiple)
    @move_type = move_type
    @input_file = input_file
  end

  def find_start(start_sequence = 14)
    line = input.first
    count = 0
    seen = []
    line.chars.each do |char|
      break if seen.count == start_sequence

      if seen.include? char
        seen = [char]
      else
        seen << char
      end
      count += 1
    end
    count - 1
  end
end