Day 25

Mix.install([
  {:kino, "~> 0.12.0"}
])

IEx.Helpers.c("/Users/johnb/dev/2023adventOfCode/advent_of_code.ex")
alias AdventOfCode, as: AOC
alias Kino.Input

# Note: when making the next template, something like this works well:
#   `cat day04.livemd | sed 's/03/04/' > day04.livemd`
#

Installation and Data

input_p1example = Kino.Input.textarea("Example Data")

input_p1puzzleInput = Kino.Input.textarea("Puzzle Input")

input_source_select =
  Kino.Input.select("Source", [{:example, "example"}, {:puzzle_input, "puzzle input"}])

p1data = fn ->
  (Kino.Input.read(input_source_select) == :example &&
     Kino.Input.read(input_p1example)) ||
    Kino.Input.read(input_p1puzzleInput)
end

Part 1

defmodule Day25 do
  def show_graph do
    """
    graph TD;
      A---B;
      A---C;
      A---D;
      B---D;
      C---D;
    """
  end

  def solve(text) do
    text
    |> AOC.as_single_lines()
    # |> Enum.reduce([1, 2, 3, 4], fn x, acc -> x * acc end)
    |> Enum.reduce(["graph TD;"], fn line, acc ->
      [node, others] = String.split(line, ":", trim: true)
      others = String.split(others, " ", trim: true)

      Enum.reduce(others, acc, fn other, acc1 -> ["  #{node}---#{other};" | acc1] end)
    end)
    |> List.flatten()
    |> Enum.reverse()
    |> Enum.take(200)
    # |> IO.inspect()
    # |> Enum.count()
    |> Enum.join("\n")
  end

  def solve2(text) do
    text
  end
end

# example data has 34 edges
# actual data has 3296 edges

# p1data.()
# |> Day25.solve()
# |> IO.inspect(label: "\n*** Part 1 solution (example: )")

#

# p1data.()
# |> Day25.solve2()
# |> IO.inspect(label: "\n*** Part 2 solution (example: )")

#

Kino.Mermaid.new(Day25.solve(p1data.()))