Improved AI with documentation

Projektgruppe_175/src/game/players/StrongAI.java

@@ -13,53 +13,68 @@ import game.AI;
 import game.Game;
 import game.Player;
 import game.map.Castle;
+import game.map.PathFinding;
 import gui.AttackThread;
+import gui.components.MapPanel.Action;
 
 public class StrongAI extends AI {
 	
-	private static boolean DEBUG = false;
+	// These values were determined mostly by trial-and-error
 	
-	private static double UTILITY_F1 = 3.0;
+	private static double UTILITY_F1 = 4.0;			// Number of adjacent friendly castles
-	private static double UTILITY_F2 = 5.0;
+	private static double UTILITY_F2 = 1.0;			// Number of adjacent enemy castles
-	private static double UTILITY_F3 = 1.0;
+	private static double UTILITY_F3 = 3.0;			// Number of connected edges
-	private static double UTILITY_F4 = -10.0;
+	private static double UTILITY_F4 = -10.0;		// Is surrounded by opponents castles
-	private static double UTILITY_F5 = 3.0;
+	private static double UTILITY_F5 = 3.0;			// Size of the castles batch
-	private static double UTILITY_F6 = 2.0;
+	private static double UTILITY_F6 = 4.0;			// Castles missing to a full kingdom
 	
-	private static double REINFORCE_F1 = 1.0;
+	private static double REINFORCE_F1 = 1.0;		// Number of adjacent enemy castles
-	private static double REINFORCE_F2 = -5.0;
+	private static double REINFORCE_F2 = -5.0;		// Is surrounded by opponents castles
-	private static double REINFORCE_F3 = 0.5;
+	private static double REINFORCE_F3 = 0.5;		// Castle utility
-	private static double REINFORCE_F4 = -100.0;
+	private static double REINFORCE_F4 = -100.0;	// Is border castle
-	private static double REINFORCE_F5 = -2.0;
+	private static double REINFORCE_F5 = -2.0;		// Number of troops
 	
-	private static double ATTACK_F1 = 1.0;
+	private static double ATTACK_F1 = 1.0;			// Castle utility
 	
-	private static double EVAL_CASTLES = 1.0;
+	private static double EVAL_OWN = 3.0;			// Weight of own utilities
+	private static double EVAL_OPP = -10.0;			// Weight of opponents utilities
+	
+	private boolean playedJoker1 = false;
+	private boolean playedJoker2 = false;
+	
+	
+	 public StrongAI(String name, Color color) {
+	        super(name, color);
+	 }
 	 
     /**
      * Evaluates the current game state
      * @param game the current game
      * @param graph the graph to be evaluated
      * @param p the player
+     * @param change the castle that should be considered to belong to p
      * @return the state value
      */
     public static double evaluateState(Game game, Graph<Castle> g, Player p, Optional<Castle> change) {
+    	// Temporarily give castle "change" to p
     	Player owner = null;
     	if(change.isPresent()) {
     		owner = change.get().getOwner();
     		change.get().setOwner(p);
     	}
+    	// Calculate total state utility
     	double value = 0;
     	for(Player player : game.getPlayers()) {
 	    	List<Castle> castles = g.getAllValues().stream()
 	    			.filter(x->x.getOwner() == player)
 	    			.collect(Collectors.toList());
 	    	
-	    	double s = (p == player)? 3.0 : -10.0;
+	    	double s = (p == player)? EVAL_OWN : EVAL_OPP;
 	    	for(Castle c : castles) {
-	    		value += s * utilityCastle(g, player, c) * EVAL_CASTLES;
+	    		value += s * utilityCastle(g, player, c);
 	    	}
     	}
+    	// Hand "change" back to its previous owner
     	if(change.isPresent()) {
     		change.get().setOwner(owner);
     	}
@@ -105,20 +120,6 @@ public class StrongAI extends AI {
     	double f6 = c.getKingdom().getCastles().stream()
     			.filter(x->x.getOwner() == p).count() - c.getKingdom().getCastles().size() + 2;
 
-    	if(DEBUG) {
-	    	System.out.println("-----");
-	    	System.out.println("Castle: " + c.getName());
-	    	System.out.println("F1: " + f1 * UTILITY_F1);
-	    	System.out.println("F2: " + f2 * UTILITY_F2);
-	    	System.out.println("F3: " + f3 * UTILITY_F3);
-	    	System.out.println("F4: " + f4 * UTILITY_F4);
-	    	System.out.println("F5: " + f5 * UTILITY_F5);
-	    	System.out.println("F6: " + f6 * UTILITY_F6);
-	    	System.out.println("Total: " + (UTILITY_F1 * f1 + UTILITY_F2 * f2 
-	    			+ UTILITY_F3 * f3 + UTILITY_F4 * f4 + f5 * UTILITY_F5
-	    			+ f6 * UTILITY_F6));
-	    	System.out.println("-----");
-    	}
     	return UTILITY_F1 * f1 + UTILITY_F2 * f2 
     			+ UTILITY_F3 * f3 + UTILITY_F4 * f4 + f5 * UTILITY_F5
     			+ f6 * UTILITY_F6;
@@ -126,10 +127,10 @@ public class StrongAI extends AI {
     
     /**
      * Analyzes the utility to attack a certain castle
-     * @param g
+     * @param g the graph
-     * @param p
+     * @param p the current player
-     * @param c
+     * @param c the castle
-     * @return
+     * @return the reinforcement utility
      */
     public static double utilityReinforce(Graph<Castle> g, Player p, Castle c) {
     	Node<Castle> node = g.getNode(c);
@@ -152,21 +153,9 @@ public class StrongAI extends AI {
     	// Is border castle
     	double f4 = isBorder(g, c)? 0.0 : 1.0;
     	
-    	// Number of troops exceeding 4
+    	// Number of troops exceeding
-    	double f5 = c.getTroopCount()-4;
+    	double f5 = c.getTroopCount();
 
-    	if(DEBUG) {
-	    	System.out.println("-----");
-	    	System.out.println("Castle: " + c.getName());
-	    	System.out.println("F1: " + f1 * REINFORCE_F1);
-	    	System.out.println("F2: " + f2 * REINFORCE_F2);
-	    	System.out.println("F3: " + f3 * REINFORCE_F3);
-	    	System.out.println("F4: " + f4 * REINFORCE_F4);
-	    	System.out.println("F5: " + f5 * REINFORCE_F5);
-	    	System.out.println("Total: " + (REINFORCE_F1 * f1 + REINFORCE_F2 * f2 + f3 * REINFORCE_F3
-	    								 + f4 * REINFORCE_F4 + f5 * REINFORCE_F5));
-	    	System.out.println("-----");
-    	}
     	return REINFORCE_F1 * f1 + REINFORCE_F2 * f2 + f3 * REINFORCE_F3
 				 + f4 * REINFORCE_F4 + f5 * REINFORCE_F5;
     }
@@ -184,40 +173,11 @@ public class StrongAI extends AI {
     	
     	double ratio = ((double)a.getTroopCount())/t.getTroopCount();
     
-    	return ratio * (ATTACK_F1 * f1);
+    	return ATTACK_F1 * f1 * ratio;
     }
     
     /**
-     * Returns a batch of connected castles around some start castle that belong to the player p
+     * Chooses the initial castles in round one
-     * @param g the graph
-     * @param p the owner of the castles
-     * @param castle the start castle
-     * @param checked a list of checked castles, initialize as new ArrayList
-     * @return a list of castles
-     */
-    public static List<Castle> getBatch(Graph<Castle> g, Player p, Castle castle, List<Castle> checked) {
-    	Node<Castle> n = g.getNode(castle);
-    	Set<Castle> adjacent = g.getEdges(n).stream()
-    			.map(x->x.getOtherNode(n).getValue())
-    			.filter(x->x.getOwner() == p)
-    			.filter(x->checked.contains(x) == false)
-    			.collect(Collectors.toSet());
-    	if(!checked.contains(castle))
-    		checked.add(castle);
-    	for(Castle c : adjacent) {
-    		checked.addAll(getBatch(g, p, c, checked).stream()
-    				.filter(x->checked.contains(x) == false)
-    				.collect(Collectors.toSet()));
-    	}
-    	return checked;
-    }
-    
-    public StrongAI(String name, Color color) {
-        super(name, color);
-    }
-    
-    /**
-     * Chooses the initial castles in round 1
      * @param game the game
      * @throws InterruptedException
      */
@@ -227,15 +187,12 @@ public class StrongAI extends AI {
     			 .collect(Collectors.toList());
     	 
     	 while(availableCastles.size() > 0 && getRemainingTroops() > 0) {
-
+             sleep(1000);
-             sleep(3);
-             
              Castle best = availableCastles.get(0);
              double bestScore = 0;
              double score = 0;
              for(Castle c : availableCastles) {
             	 score = evaluateState(game, game.getMap().getGraph(), this, Optional.of(c));
-            	 //score = evaluateLookahead(game, game.getMap().getGraph(), this, 10);
             	 if(score > bestScore) {
             		 bestScore = score;
             		 best = c;
@@ -256,6 +213,7 @@ public class StrongAI extends AI {
     	List<Castle> castles = game.getMap().getCastles().stream()
     			.filter(x->x.getOwner() == this)
     			.collect(Collectors.toList());
+    	
     	while(this.getRemainingTroops() > 0) {
     		Castle best = castles.get(0);
     		double bestScore = 0;
@@ -266,7 +224,7 @@ public class StrongAI extends AI {
             		best = c;
             	}
             }
-            sleep(5);
+            sleep(500);
             game.addTroops(this, best, 1);
             
         }
@@ -295,12 +253,16 @@ public class StrongAI extends AI {
     		while(d.getTroopCount() > 1) {
     			double bestScore = 0;
 	    		Castle best = receivers.get(0);
-	    		
+	    		// Do not cheat like evil BasicAI,
+	    		// only move troops if there is a path
+	    		PathFinding path = new PathFinding(g, d, Action.MOVING, this);
 	    		for(Castle c : receivers) {
 	    			double score = utilityReinforce(g, this, c);
-	    			if(score > bestScore) {
+	    			if(score > bestScore && path.getPath(c) != null) {
-	    				bestScore = score;
+	    				if(path.getPath(c).size() > 0) {
-	    				best = c;
+	    					bestScore = score;
+	    					best = c;
+	    				}
 	    			}
 	    		}
 	    		if(best == d) break;
@@ -342,7 +304,8 @@ public class StrongAI extends AI {
     				best = t;
     			}
     		}
-    		if(bestScore > evaluateState(game, g, this, Optional.empty())) {
+    		// Attack, if the chance of taking the castle is more useful than not attacking
+    		if(bestScore > evaluateState(game, g, this, Optional.empty()) && a.getTroopCount() > best.getTroopCount()) {
     			 AttackThread attackThread = game.startAttack(a, best, a.getTroopCount());
                  if(fastForward)
                      attackThread.fastForward();
@@ -357,20 +320,38 @@ public class StrongAI extends AI {
     	return false;
     }
     
+    /**
+     * Play some jokers
+     * @param game the current game
+     */
+    private void playJokers(Game game) {
+    	if(!playedJoker1) {
+	    	if(this.getCastles(game).size() <= game.getMap().getCastles().size()/2) {
+	    		playedJoker1 = true;
+	    		System.out.println("StrongAI played joker 1.");
+	    		this.addTroops(5);
+	    	}
+    	}
+    	if(!playedJoker2) {
+    		// TODO: Play joker 2
+    	}
+    }
+    
     @Override
     protected void actions(Game game) throws InterruptedException {
         if(game.getRound() == 1) {
            chooseInitialCastles(game);
         }else {
+        	playJokers(game);
         	distributeTroops(game);
         	boolean shouldAttack = false;
             do {
-            	//fastForward();
             	shouldAttack = attackCastles(game);
             	reinforceCastles(game);
             }while(shouldAttack);
         }
     }
+    
     /**
      * Checks, whether a given castle has adjacent opponent castles
      * @param g the graph
@@ -387,4 +368,28 @@ public class StrongAI extends AI {
     	return (a > 0)? true : false;
     }
     
+    /**
+     * Returns a batch of connected castles around some start castle that belong to the player p
+     * @param g the graph
+     * @param p the owner of the castles
+     * @param castle the start castle
+     * @param checked a list of checked castles, initialize as new ArrayList
+     * @return a list of castles
+     */
+    public static List<Castle> getBatch(Graph<Castle> g, Player p, Castle castle, List<Castle> checked) {
+    	Node<Castle> n = g.getNode(castle);
+    	Set<Castle> adjacent = g.getEdges(n).stream()
+    			.map(x->x.getOtherNode(n).getValue())
+    			.filter(x->x.getOwner() == p)
+    			.filter(x->checked.contains(x) == false)
+    			.collect(Collectors.toSet());
+    	if(!checked.contains(castle))
+    		checked.add(castle);
+    	for(Castle c : adjacent) {
+    		checked.addAll(getBatch(g, p, c, checked).stream()
+    				.filter(x->checked.contains(x) == false)
+    				.collect(Collectors.toSet()));
+    	}
+    	return checked;
+    }
 }