defmodule Pass do
  defstruct passline: ""
  def parse_input(input_string) do
    %Pass{passline: input_string}
  end
  def valid(pass) do
    ["byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid"]
    |> Enum.map(&(pass.passline =~ &1))
    |> Enum.all?(&(&1 == true))
  end
end
defmodule Passport do
  defstruct [
    :birth_year,
    :country_id,
    :expiration_year,
    :eye_color,
    :hair_color,
    :height,
    :issue_year,
    :passport_id
  ]
  def parse_input(input_string) do
    input_string
    |> String.split(" ", trim: true)
    |> Enum.reduce(%Passport{}, &parse_prop/2)
  end
  def valid(passport) do
    [
      passport.birth_year,
      passport.expiration_year,
      passport.eye_color,
      passport.hair_color,
      passport.height,
      passport.issue_year,
      passport.passport_id
    ]
    |> Enum.any?(&is_nil/1)
    |> Kernel.not()
  end
  defp parse_prop("byr:" <> byr, passport) do
    %{passport | birth_year: byr}
  end
  defp parse_prop("eyr:" <> eyr, passport) do
    %{passport | expiration_year: eyr}
  end
  defp parse_prop("hgt:" <> hgt, passport) do
    %{passport | height: hgt}
  end
  defp parse_prop("pid:" <> pid, passport) do
    %{passport | passport_id: pid}
  end
  defp parse_prop("ecl:" <> ecl, passport) do
    %{passport | eye_color: ecl}
  end
  defp parse_prop("hcl:" <> hcl, passport) do
    %{passport | hair_color: hcl}
  end
  defp parse_prop("iyr:" <> iyr, passport) do
    %{passport | issue_year: iyr}
  end
  defp parse_prop("cid:" <> cid, passport) do
    %{passport | country_id: cid}
  end
end
input =
  File.read!("input")
  |> String.split("\n\n", trim: true)
  |> Enum.map(&Pass.parse_input/1)
  |> Enum.filter(&Pass.valid/1)
IO.inspect(input)
Enum.count(input) |> IO.inspect()