Improve scoring algorithm

days/2/code.wat

@@ -143,70 +143,49 @@
   (func $getScore (param $theirs i32) (param $ours i32) (result i32)
     (local $diff i32)
 
-    ;; get diff value
-    local.get $theirs
+    ;; some modulo math to get ours - theirs (with wraparound)
     local.get $ours
+    i32.const 3
+    i32.add
+    local.get $theirs
     i32.sub
+    i32.const 3
+    i32.rem_s
     local.set $diff
 
-    block $conditions
-      ;; if it's a draw
+    block $checks
       local.get $diff
-      i32.eqz
-      if 
-        i32.const 3 ;; 3 points for draw
-        local.get $ours ;; points for what you played
-        i32.add
+      i32.eqz;; if we tied
+      if
+        i32.const 3
         local.set $diff
-        br $conditions
+        br $checks
       end
 
-      ;; check which is greater
+      ;; if we won
       local.get $diff
-      i32.const 0
-      i32.lt_s
-      if ;; diff is negative, ours is bigger than theirs
-
-        local.get $diff
-        i32.const -2
-        i32.eq
-        if ;; if the diff is two, we did scissors (3), they did rock (1); they win
-          local.get $ours
-          local.set $diff
-          br $conditions
-        else ;; diff of one, we won (scissors beats paper, paper beats rock)
-          i32.const 6
-          local.get $ours
-          i32.add
-          local.set $diff
-          br $conditions
-        end
-
-      else ;; diff is positive, theirs is bigger than ours
-
-        local.get $diff
-        i32.const 2
-        i32.eq
-        if ;; if the diff is two, we did rock (1), they did scissors (3), we win
-          i32.const 6
-          local.get $ours
-          i32.add
-          local.set $diff
-          br $conditions
-        else ;; diff of one, they won
-          local.get $ours
-          local.set $diff
-          br $conditions
-        end
+      i32.const 1
+      i32.eq
+      if
+        i32.const 6
+        local.set $diff
+        br $checks
       end
-    end
 
-    (; local.get $theirs ;)
-    (; local.get $ours ;)
-    (; local.get $diff ;)
-    (; call $log3 ;)
+      ;; if we lost
+      local.get $diff
+      i32.const 2
+      i32.eq
+      if
+        i32.const 0
+        local.set $diff
+        br $checks
+      end
+    end
 
     local.get $diff
+    local.get $ours
+    i32.add
   )
 
   (func $readLine (result i32 i32)