finished fight logic

~2h work

src/main/java/at/nanopenguin/mtcg/application/Battle.java

@@ -2,16 +2,25 @@ package at.nanopenguin.mtcg.application;
 
 import at.nanopenguin.mtcg.Pair;
 import at.nanopenguin.mtcg.application.service.schemas.Card;
-import lombok.Getter;
+import lombok.*;
-import lombok.Setter;
 
 import java.sql.SQLException;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
-import java.util.Random;
 
 public class Battle {
-    private record RoundResult(String winnerName, Card winnerCard, String loserName, Card loserCard, boolean draw) {};
+
+    @RequiredArgsConstructor
+    private enum ElementMod {
+        HALF(0.5),
+        NONE(1),
+        DOUBLE(2);
+
+        public final double percentMod;
+    }
+    private record FightDTO(Combatant player, Card card) {};
+    private record RoundResult(FightDTO winner, FightDTO loser, boolean draw, ElementMod winnerMod, ElementMod loserMod) {};
     private Pair<Combatant, Combatant> combatants;
     @Getter
     private volatile List<String> log = new ArrayList<>();
@@ -27,28 +36,151 @@ public class Battle {
     }
 
     public void start() throws SQLException {
+        boolean leftWins;
 
+        int round = 0;
         do {
-            this.playRound();
+            this.playRound(++round);
-        } while (combatants.left().deckSize() > 0 && combatants.right().deckSize() > 0);
+            if (round == 100) return; // don't update stats on draw
+
+            System.out.println(combatants.left().deckSize() + " - " + combatants.right().deckSize() );
+        } while ((leftWins = combatants.left().deckSize() > 0) && combatants.right().deckSize() > 0);
 
-        // placeholder
-        boolean leftWins = new Random().nextBoolean();
         this.combatants.left().updateStats(leftWins);
         this.combatants.right().updateStats(!leftWins);
     }
 
-    private void playRound() {
+    private void playRound(int round) {
-        Pair<Card, Card> cards = new Pair<>(this.combatants.left().getCard(), this.combatants.right().getCard());
+        RoundResult result = this.fight(
-        //RoundResult result = this.fight(cards.left(), cards.right());
+                new FightDTO(
-        //this.log.add("");
+                        this.combatants.left(),
+                        this.combatants.left().getAndRemoveCard()),
+                new FightDTO(
+                        this.combatants.right(),
+                        this.combatants.right().getAndRemoveCard()));
+
+        this.log.add(this.createCombatString(round, result));
+
+        result.winner().player().addCard( // return card to winner deck
+                result.winner().card());
+
+        if (result.draw()) {
+            result.loser().player().addCard( // on draw both players get their card
+                    result.loser().card());
+            return;
+        }
+
+        result.winner.player().addCard( // on lose winner gets losers card to deck
+                result.loser().card());
     }
 
-    private boolean fight(Card left, Card right) {
+    private boolean isImmune(Card defend, Card attack) {
-        return true;
+        if (defend.name().equals("Dragon") && attack.name().endsWith("Goblin")) return true;
+        if (defend.name().equals("Wizzard") && attack.name().equals("Ork")) return true;
+        if (defend.name().equals("WaterSpell") && attack.name().equals("Knight")) return true;
+        if (defend.name().equals("Kraken") && attack.name().endsWith("Spell")) return true;
+        if (defend.name().equals("FireElf") && attack.name().equals("Dragon")) return true;
+
+        return false;
     }
 
-    private String createCombatString(RoundResult result) {
+    private enum Element {
-        return "";
+        NORMAL,
+        FIRE,
+        WATER;
+        private Element[] strong;
+        private Element[] weak;
+
+        // improvement: map to get mods straight from this enum
+
+        static {
+            NORMAL.strong = new Element[]{WATER};
+            NORMAL.weak = new Element[]{FIRE};
+
+            FIRE.strong = new Element[]{NORMAL};
+            FIRE.weak = new Element[]{WATER};
+
+            WATER.strong = new Element[]{FIRE};
+            WATER.weak = new Element[]{NORMAL};
+        }
+    }
+
+    private Pair<ElementMod, ElementMod> getElementMod(Card left, Card right) {
+        Pair<ElementMod, ElementMod> returnMods = new Pair<>(ElementMod.NONE, ElementMod.NONE);
+
+        if (!left.name().endsWith("Spell") && !right.name().endsWith("Spell")) return returnMods;
+
+        Element leftElement = Element.NORMAL;
+        Element rightElement = Element.NORMAL;
+
+        for (val value : Element.values()) {
+            if (left.name().toLowerCase().startsWith(value.name().toLowerCase())) leftElement = value;
+            if (right.name().toLowerCase().startsWith(value.name().toLowerCase())) rightElement = value;
+        }
+
+        final Element finalLeftElement = leftElement; // lambdas
+        final Element finalRightElement = rightElement;
+
+        if (Arrays.stream(leftElement.strong).anyMatch(value -> value == finalRightElement)) returnMods.setLeft(ElementMod.DOUBLE);
+        else if (Arrays.stream(leftElement.weak).anyMatch(value -> value == finalRightElement)) returnMods.setLeft(ElementMod.HALF);
+
+        if (Arrays.stream(rightElement.strong).anyMatch(value -> value == finalLeftElement)) returnMods.setRight(ElementMod.DOUBLE);
+        else if (Arrays.stream(rightElement.weak).anyMatch(value -> value == finalLeftElement)) returnMods.setRight(ElementMod.HALF);
+
+        return returnMods;
+    }
+
+    private RoundResult fight(FightDTO left, FightDTO right) {
+        if (this.isImmune(left.card(), right.card())) return new RoundResult(left, right, false, ElementMod.NONE, ElementMod.NONE);
+        if (this.isImmune(right.card(), left.card())) return new RoundResult(right, left, false, ElementMod.NONE, ElementMod.NONE);
+
+        Pair<ElementMod, ElementMod> dmgMods = getElementMod(left.card(), right.card());
+
+        boolean leftWins = left.card().damage()*dmgMods.left().percentMod > right.card().damage()*dmgMods.right().percentMod;
+        return new RoundResult(
+                leftWins ? left : right,
+                leftWins ? right : left,
+                left.card().damage()*dmgMods.left().percentMod == right.card().damage()*dmgMods.right().percentMod,
+                leftWins ? dmgMods.left() : dmgMods.right(),
+                leftWins ? dmgMods.right() : dmgMods.left());
+    }
+
+    private String createCombatString(int round, RoundResult result) {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder
+                .append(round)
+                .append(": ")
+                .append(String.format("%s: %s (%s damage)",
+                                result.winner().player().name,
+                                result.winner().card().name(),
+                                result.winner().card().damage()))
+                .append(" vs. ")
+                .append(String.format("%s: %s (%s damage)",
+                        result.loser().player().name,
+                        result.loser().card().name(),
+                        result.loser().card().damage()))
+                .append(" => ");
+
+        if (result.winnerMod() != ElementMod.NONE || result.loserMod() != ElementMod.NONE) {
+            stringBuilder
+                    .append(String.format("%s vs. %s",
+                            result.winner().card().damage(),
+                            result.loser().card().damage()))
+                    .append(" -> ")
+                    .append(String.format("%s vs. %s",
+                            result.winner().card().damage() * result.winnerMod().percentMod,
+                            result.loser().card().damage() * result.loserMod().percentMod))
+                    .append(" => ");
+        }
+
+        if (result.draw()) {
+            return stringBuilder.append("Draw").toString();
+        }
+
+        stringBuilder
+                .append(result.winner().card().name())
+                .append(" wins");
+
+        return stringBuilder.toString();
     }
 }

src/main/java/at/nanopenguin/mtcg/application/Combatant.java

@@ -47,7 +47,7 @@ public class Combatant {
                 .executeUpdate();
     };
 
-    public Card getCard() {
+    public Card getAndRemoveCard() {
         return this.deck.popRandom();
     }