def read_full_code
  @full_code = File.read('day2.txt').split(",")
  @full_code.each_with_index do |v, i|
    @full_code[i] = v.to_i
  end
end

def handle_opcode(opcode)
  case (opcode[0])
    when 1
      @full_code[opcode[3]] = @full_code[opcode[1]] + @full_code[opcode[2]]
      return false
    when 2
      @full_code[opcode[3]] = @full_code[opcode[1]] * @full_code[opcode[2]]
      return false
    when 99
      return true
  end
end

def get_opcode(offset)
  pos1 = 0 + offset
  pos2 = 1 + offset
  pos3 = 2 + offset
  pos4 = 3 + offset
  return [@full_code[pos1], @full_code[pos2], @full_code[pos3], @full_code[pos4]]
end

def handle_full_code
  offset = 0
  code = get_opcode(offset)
  #pp code
  while (!handle_opcode(code))
    offset += 4
    code = get_opcode(offset)
    #pp code
  end
  @full_code
end

def part_1
  read_full_code
  @full_code[1] = 12 #noun
  @full_code[2] = 2 # verb
  pp handle_full_code[0]
end

part_1