From e02d027b1dded94078110ba9f0ff4026c5e5ebeb Mon Sep 17 00:00:00 2001
From: Samuel Owen <SamHirael@gmail.com>
Date: Fri, 29 Dec 2023 17:38:10 +0000
Subject: [PATCH] Add get_minimal_map function to calculate the minimal map of
 a game

---
 lib/day2/day2.ex        | 19 +++++++++++++++++++
 test/day2/day2_test.exs | 19 +++++++++++--------
 2 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/lib/day2/day2.ex b/lib/day2/day2.ex
index 7eca4af..68350f3 100644
--- a/lib/day2/day2.ex
+++ b/lib/day2/day2.ex
@@ -111,4 +111,23 @@ defmodule Day2 do
     blue = if(cube_map[:blue] == 0, do: 1, else: cube_map[:blue])
     red * green * blue
   end
+
+  def get_minimal_map(game_string) do
+    game_sets = parse_game_sets(game_string)
+
+    game_set_maps =
+      Enum.reduce(game_sets, [], fn set, acc ->
+        [parse_game_set_amounts(set) | acc]
+      end)
+
+    max_red = get_max_cubes(game_set_maps, :red)
+    max_green = get_max_cubes(game_set_maps, :green)
+    max_blue = get_max_cubes(game_set_maps, :blue)
+
+    %{
+      :red => max_red,
+      :green => max_green,
+      :blue => max_blue
+    }
+  end
 end
diff --git a/test/day2/day2_test.exs b/test/day2/day2_test.exs
index d39b252..5931b21 100644
--- a/test/day2/day2_test.exs
+++ b/test/day2/day2_test.exs
@@ -166,14 +166,17 @@ defmodule Day2Test do
     assert Day2.get_max_cubes(game_1_sets, :green) == 2
   end
 
-  # test "returns the power of a set of cubes" do
-  #   # The power of a set of cubes is equal to the numbers of red, green, and blue cubes multiplied together.
-  #   game_1_string = "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green"
-  #   assert Day2.get_power_of_set(game_1_string) == 48
-  # end
-
-  # We need a test for a set string, not just the extracted map as we have above.
-  # ... test here:
+  test "returns the minimal map of a game" do
+    # The power of a set of cubes is equal to the numbers of red, green, and blue cubes multiplied together.
+    game_1_string = "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green"
+
+    assert Day2.get_minimal_map(game_1_string) == %{
+             :red => 4,
+             :green => 2,
+             :blue => 6
+           }
+  end
+
   test "returns the power of a set string" do
     game_set_string = "3 blue, 4 red"
     assert Day2.get_power_of_set(game_set_string) == 12