WIP

lib/chore_tracker/chores.ex

@@ -128,8 +128,12 @@ defmodule ChoreTracker.Chores do
   end
 
   @doc """
-  Calculate next assignee for the chore.
+  Calculate next assignee for the chore according to the following algorithm:
-  Assigns the person who last did the task the longest time ago.
+
+  - Select the person who did the task the longest time ago (or never).
+  - If there are multiple persons who did the taks same time ago (or never),
+    select the one with least assigned chores.
+
   Returns `nil` if chore has no assignees.
   """
   def next_chore_assignee(%Chore{} = chore) do
@@ -144,10 +148,11 @@ defmodule ChoreTracker.Chores do
             %ChoreLog{inserted_at: inserted_at} -> DateTime.to_unix(inserted_at)
           end
 
-        {time, length(assignee.assigned_chores)}
+        {time, -length(assignee.assigned_chores)}
       end,
-      :desc
+      :asc
     )
     |> List.first()
+    |> dbg
   end
 end