1 files changed, 43 insertions, 14 deletions
diff --git a/lib/mill.fnl b/lib/mill.fnl
index de54128..e3b3337 100644
--- a/lib/mill.fnl
+++ b/lib/mill.fnl
@@ -1,16 +1,45 @@
 (local {: contains} (require :lib.contains))
 
-;; Does this move result in a mill?
-(fn mill? [rules state move]
-  (let [candidates (icollect [_ mill (ipairs rules)] (if (contains mill move) mill))
-        candidate->moves (icollect [_ spaces (ipairs candidates)]
-                                  (icollect [_ space (ipairs spaces)] (. state space)) )
-        candidate-mill? (icollect [_ moves (ipairs candidate->moves)]
-                                  (accumulate [acc true
-                                              idx m (ipairs moves)]
-                                              (and acc (not= 0 m) (= (. moves idx) m)))) ]
-    (accumulate [acc true
-                 _ x (ipairs candidate-mill?)]
-                (and acc x))))
-
-{: mill?}
+
+(fn get-candidates [all-mills next-move]
+  "a list of mills that contain next-move"
+  (icollect [_ mill (ipairs all-mills)] (if (contains mill next-move) mill)))
+
+(fn candidates->moves [candidates current-moves move player]
+  "a list of the candidate mills expressed as current moves"
+  (icollect [_ spaces (ipairs candidates)]
+    (icollect [_ space (ipairs spaces)] 
+              (if (= space move) :x (. current-moves space)))))
+
+(fn moves->mills [spaces player]
+  "a list of bools if the candidate moves + player are all the same"
+  (let [next-move (icollect [_ y (ipairs spaces)]
+                            (icollect [_ x (ipairs y)]
+                                      (if (= x :x) player x))) ]
+    (icollect [_ move (ipairs next-move)]
+      (accumulate [acc true
+                   idx m (ipairs move)]
+        (and acc (= player m))))))
+
+(fn any [t]
+	(accumulate [acc false
+               i x (ipairs t)]
+               (or acc x)))
+
+
+(fn mill? [all-mills current-moves next-move player]
+  "Does the current move for the current player create a mill?"
+  (let [candidates (get-candidates all-mills next-move)
+        moves (candidates->moves candidates current-moves next-move player)
+        mills (moves->mills moves player)
+        result (any mills)]
+		result))
+
+{: mill?
+ ;; not for consumption,
+ ;; just for testing:
+ : get-candidates
+ : candidates->moves
+ : moves->mills
+ : any
+ }