From 2b8b59c8181ba5f1b13bad39810f2ce7f59516ea Mon Sep 17 00:00:00 2001
From: gregchan550 <gregchan550@gmail.com>
Date: Tue, 10 Oct 2023 21:22:57 +1000
Subject: [PATCH] commit where slow doesn't crash the game

---
 .../csse3200/game/areas/ForestGameArea.java   |  2 +-
 .../game/components/EffectComponent.java      | 21 +++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/source/core/src/main/com/csse3200/game/areas/ForestGameArea.java b/source/core/src/main/com/csse3200/game/areas/ForestGameArea.java
index 7a4a7f81a..7794d9e00 100644
--- a/source/core/src/main/com/csse3200/game/areas/ForestGameArea.java
+++ b/source/core/src/main/com/csse3200/game/areas/ForestGameArea.java
@@ -326,7 +326,7 @@ public void create() {
 //    waves.getEvents().addListener("spawnWave", this::spawnMob);
     spawnGregMob(18, 2);
 //    spawnDemonBoss();
-    spawnEffectProjectile(new Vector2(5f,2f), PhysicsLayer.HUMANS, 20, new Vector2(1f,1f), ProjectileEffects.STUN, false);
+    spawnEffectProjectile(new Vector2(10f,2f), PhysicsLayer.NPC, 20, new Vector2(2f,2f), ProjectileEffects.SLOW, false);
 
     spawnScrap();
     spawnGapScanners();
diff --git a/source/core/src/main/com/csse3200/game/components/EffectComponent.java b/source/core/src/main/com/csse3200/game/components/EffectComponent.java
index 367be90dd..5d6830016 100644
--- a/source/core/src/main/com/csse3200/game/components/EffectComponent.java
+++ b/source/core/src/main/com/csse3200/game/components/EffectComponent.java
@@ -30,6 +30,7 @@ public class EffectComponent extends Component {
     private long burnTime;
     private long slowTime;
     private long stunTime;
+    private Vector2 initialSpeed;
     private static long BURN_TICK = 1000;
 
     public EffectComponent(boolean mob) {
@@ -56,6 +57,15 @@ public void update() {
         }
 
         // apply slow effect
+        if (mob) {
+            if (slowFlag) {
+                Vector2 halfSpeed = new Vector2(target.getComponent(PhysicsMovementComponent.class).getSpeed());
+                changeSpeed(new Vector2(halfSpeed.x / 2, halfSpeed.y / 2));
+            } else if (isSlowed) {
+                changeSpeed(initialSpeed);
+                isSlowed = false;
+            }
+        }
         if (slowFlag && !isSlowed) {
             slowEffect(2);
         } else if (!slowFlag && isSlowed) {
@@ -82,6 +92,7 @@ public void applyEffect(ProjectileEffects effect, Entity host, Entity target) {
             case SLOW -> {
                 slowFlag = true;
                 slowTime = gameTime.getTime() + EFFECT_DURATION;
+                initialSpeed = entity.getComponent(PhysicsMovementComponent.class).getSpeed();
             }
             case STUN -> {
                 stunFlag = true;
@@ -119,6 +130,16 @@ private void slowEffect(int amount) {
         }
     }
 
+    private void changeSpeed(Vector2 speed) {
+        PhysicsMovementComponent targetPhysics = target.getComponent(
+                PhysicsMovementComponent.class);
+        if (targetPhysics == null) {
+            return;
+        }
+        // Set mob speed
+        targetPhysics.setSpeed(speed);
+    }
+
     private void stunEffect(boolean stunned) {
         isStunned = true;
         AITaskComponent targetAI = target.getComponent(AITaskComponent.class);