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defmodule UI.Helpers do
  @moduledoc """
  Provides common helpers and js commands to work with
  UI components.

  """

  @doc """
  Utility function that pipes into `assigns` and
  helps with class concatenation inside live_views

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defmodule Day11 do
  @ets_table_name :day11_max_powers
  @grid {300, 300}

  @doc """
  Initializes required partial sum caching mechanism (ets table).
  """
  def start() do
    :ets.new(@ets_table_name, [:set, :named_table, read_concurrency: true])
  end

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defmodule Day12 do
  @initial_state "##.#....#..#......#..######..#.####.....#......##.##.##...#..#....#.#.##..##.##.#.#..#.#....#.#..#.#"

  @doc """
  Resolves part#1.
  """
  @spec index_sum_after_iteration(pos_integer) :: pos_integer
  def index_sum_after_iteration(iteration \\ 20) do
    last_state = iterate(@initial_state, iteration)
    to_sum(last_state)

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defmodule Day11 do
  @ets_table_name :day11_max_powers
  @grid {300, 300}

  @doc """
  Initializes required partial sum caching mechanism (ets table).
  """
  def start() do
    :ets.new(@ets_table_name, [:set, :named_table, read_concurrency: true])
  end

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defmodule ChronalCoordinates do
  def calc_part2(str_coords, threshold) do
    coords = parse_coords(str_coords)
    {bound_x, bound_y} = find_boundaries(coords)

    reduce_grid({bound_x, bound_y}, 0, fn x, y, acc ->
      sum = Enum.reduce(coords, 0, &sum_of_distances(&1, &2, {x, y}))
      if sum < threshold, do: acc + 1, else: acc
    end)
  end

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defmodule AlchemicalReduction do
  @doc """
  For example, again using the polymer dabAcCaCBAcCcaDA from above:

    * Removing all A/a units produces dbcCCBcCcD. Fully reacting this polymer produces dbCBcD, which has length 6.
    * Removing all B/b units produces daAcCaCAcCcaDA. Fully reacting this polymer produces daCAcaDA, which has length 8.
    * Removing all C/c units produces dabAaBAaDA. Fully reacting this polymer produces daDA, which has length 4.
    * Removing all D/d units produces abAcCaCBAcCcaA. Fully reacting this polymer produces abCBAc, which has length 6.

  In this example, removing all C/c units was best, producing the answer 4.

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defmodule ReposeRecord do
  def calc_part1(logs_str) do
    logs_str
    |> String.split("\n", trim: true)
    |> sort_logs()
    |> Enum.map(&parse_event/1)
    |> chart_event_timeline()
    |> gather_guard_stats()
    |> calc_weakest_guards_most_slept_metric()
  end

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defmodule SpoilsOfFabric do
  def count_overlaps(stream) do
    stream
    |> Stream.map(&cleanup/1)
    |> Stream.map(&to_grid_positions/1)
    |> Enum.reduce(%{}, &count_positions/2)
    |> Enum.reduce(0, &count_overlaps/2)
  end

  def detect_sacred_fabric(stream) do

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defmodule InventoryManagement.Checksum do
  def checksum(stream) do
    stream
    |> Stream.map(&String.trim/1)
    |> Stream.map(&count_occurances/1)
    |> Enum.reduce([two: 0, three: 0], &collect_each/2)
    |> Enum.reduce(1, fn {_, val}, acc -> val * acc end)
  end

  defp collect_each([two: item_two, three: item_three], two: two, three: three) do

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defmodule ChronalCalibration do
  def calc_result(stream), do: Enum.sum(stream)

  def find_first_redundant(stream) do
    Stream.cycle(stream)
    |> Stream.scan({0, MapSet.new([0])}, &collect_step/2)
    |> Stream.filter(&redundant?/1)
    |> Stream.map(fn {elem, _} -> elem end)
    |> Enum.take(1)
    |> Enum.at(0)