From 7ca733457566fdfa097e3317d96a50147229ca74 Mon Sep 17 00:00:00 2001
From: Pacien TRAN-GIRARD
Date: Sat, 21 Nov 2015 17:31:28 +0100
Subject: Implement Mouse A.I.

---
 src/ch/epfl/maze/physical/zoo/Mouse.java | 37 +++++++++++++++++++++++++++-----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/src/ch/epfl/maze/physical/zoo/Mouse.java b/src/ch/epfl/maze/physical/zoo/Mouse.java
index e5cb9ae..1b22c66 100644
--- a/src/ch/epfl/maze/physical/zoo/Mouse.java
+++ b/src/ch/epfl/maze/physical/zoo/Mouse.java
@@ -1,14 +1,22 @@
 package ch.epfl.maze.physical.zoo;
 
 import ch.epfl.maze.physical.Animal;
+import ch.epfl.maze.physical.ProbabilisticAnimal;
 import ch.epfl.maze.util.Direction;
 import ch.epfl.maze.util.Vector2D;
 
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Mouse A.I. that remembers only the previous choice it has made.
+ *
+ * @author Pacien TRAN-GIRARD
  */
 
-public class Mouse extends Animal {
+public class Mouse extends ProbabilisticAnimal {
+
+    private Direction previousChoice;
 
     /**
      * Constructs a mouse with a starting position.
@@ -18,6 +26,24 @@ public class Mouse extends Animal {
 
     public Mouse(Vector2D position) {
         super(position);
+        this.previousChoice = Direction.NONE;
+    }
+
+    /**
+     * Excludes the origin direction for choices.
+     *
+     * @param choices An array of choices
+     * @return An array of smart choices
+     */
+
+    private Direction[] excludeOrigin(Direction[] choices) {
+        List<Direction> smartChoices = new ArrayList<>(choices.length - 1); // max size, excluding origin
+
+        for (Direction dir : choices)
+            if (!dir.isOpposite(this.previousChoice))
+                smartChoices.add(dir);
+
+        return smartChoices.toArray(new Direction[smartChoices.size()]);
     }
 
     /**
@@ -27,13 +53,14 @@ public class Mouse extends Animal {
 
     @Override
     public Direction move(Direction[] choices) {
-        // TODO
-        return Direction.NONE;
+        Direction[] smartChoices = choices.length > 1 ? this.excludeOrigin(choices) : choices;
+        Direction dir = super.move(smartChoices);
+        this.previousChoice = dir;
+        return dir;
     }
 
     @Override
     public Animal copy() {
-        // TODO
-        return null;
+        return new Mouse(this.getPosition());
     }
 }
-- 
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