From 8e38cbfb279c087156acb325fbdb49eac0afc71d Mon Sep 17 00:00:00 2001
From: Martin <mail2maras@gmail.com>
Date: Tue, 6 Dec 2022 09:15:05 +0100
Subject: [PATCH] Wave lifetime

---
 .../Scripts/Game/Unit/Enemy/EnemyManager.ts   |  2 +-
 .../Game/Unit/Enemy/InvididualEnemySpawner.ts |  4 +-
 .../Game/Unit/Enemy/WaveEnemySpawner.ts       | 55 ++++++++++++++++---
 3 files changed, 50 insertions(+), 11 deletions(-)

diff --git a/assets/Scripts/Game/Unit/Enemy/EnemyManager.ts b/assets/Scripts/Game/Unit/Enemy/EnemyManager.ts
index b16f31d..a3cc726 100644
--- a/assets/Scripts/Game/Unit/Enemy/EnemyManager.ts
+++ b/assets/Scripts/Game/Unit/Enemy/EnemyManager.ts
@@ -30,7 +30,7 @@ export class EnemyManager extends Component {
 
         this.individualEnemySpawner = new IndividualEnemySpawner(this.enemySpawner, EnemyType.Basic);
         this.circularEnemySpawner = new CircularEnemySpawner(this.enemySpawner, 30, EnemyType.Basic);
-        this.waveEnemySpawner = new WaveEnemySpawner(this.enemySpawner, 30, EnemyType.Basic);
+        this.waveEnemySpawner = new WaveEnemySpawner(this.enemySpawner, 30, 10, EnemyType.Basic);
 
         this.movementTypeToMover.set(EnemyMovementType.Follow, new FollowTargetEnemyMover(targetNode));
         this.movementTypeToMover.set(EnemyMovementType.Launch, new LaunchToTargetEnemyMover(targetNode));
diff --git a/assets/Scripts/Game/Unit/Enemy/InvididualEnemySpawner.ts b/assets/Scripts/Game/Unit/Enemy/InvididualEnemySpawner.ts
index c696626..b7932b5 100644
--- a/assets/Scripts/Game/Unit/Enemy/InvididualEnemySpawner.ts
+++ b/assets/Scripts/Game/Unit/Enemy/InvididualEnemySpawner.ts
@@ -7,7 +7,9 @@ import { EnemyType } from "./EnemyType";
 
 export class InvididualEnemySpawner {
     private spawnTimer: GameTimer = new GameTimer(1);
-    public constructor(private enemySpawner: EnemySpawner, enemyType: EnemyType) {}
+
+    public constructor(private enemySpawner: EnemySpawner, private enemyType: EnemyType) {}
+
     public gameTick(deltaTime: number): void {
         this.spawnTimer.gameTick(deltaTime);
         if (this.spawnTimer.tryFinishPeriod()) {
diff --git a/assets/Scripts/Game/Unit/Enemy/WaveEnemySpawner.ts b/assets/Scripts/Game/Unit/Enemy/WaveEnemySpawner.ts
index 62bc012..0025c07 100644
--- a/assets/Scripts/Game/Unit/Enemy/WaveEnemySpawner.ts
+++ b/assets/Scripts/Game/Unit/Enemy/WaveEnemySpawner.ts
@@ -1,27 +1,64 @@
+import { randomRange } from "cc";
 import { GameTimer } from "../../../Services/GameTimer";
 import { randomPositiveOrNegative } from "../../../Services/Utils/MathUtils";
+import { Enemy } from "./Enemy";
 import { EnemyMovementType } from "./EnemyMovementType";
 import { EnemySpawner } from "./EnemySpawner";
 import { EnemyType } from "./EnemyType";
 
 export class WaveEnemySpawner {
     private spawnTimer: GameTimer = new GameTimer(5);
-    public constructor(private enemySpawner: EnemySpawner, private enemiesToSpawn: number, private enemyType: EnemyType) {}
+    private groups: EnemyGroupWithLifetime[] = [];
+    public constructor(
+        private enemySpawner: EnemySpawner,
+        private enemiesToSpawn: number,
+        private enemyLifeTime: number,
+        private enemyType: EnemyType
+    ) {}
 
     public gameTick(deltaTime: number): void {
         this.spawnTimer.gameTick(deltaTime);
 
-        if (this.spawnTimer.tryFinishPeriod()) {
-            const angle: number = (2 * Math.PI) / this.enemiesToSpawn;
+        this.tryRemoveExpiredEnemies(deltaTime);
+        this.trySpawnNewGroup();
+    }
 
-            const defaultPosX: number = 200 * randomPositiveOrNegative();
-            const defaultPosY: number = 200 * randomPositiveOrNegative();
+    private tryRemoveExpiredEnemies(deltaTime: number): void {
+        for (let i = this.groups.length - 1; 0 <= i; i--) {
+            const group: EnemyGroupWithLifetime = this.groups[i];
+            group.lifeTimeLeft -= deltaTime;
+            if (group.lifeTimeLeft <= 0) {
+                for (const enemy of group.enemies) {
+                    this.enemySpawner.returnEnemy(enemy);
+                }
 
-            for (let i = 0; i < this.enemiesToSpawn; i++) {
-                const posX: number = defaultPosX + 10 * i;
-                const posY: number = defaultPosY + 10 * (i % 2);
-                this.enemySpawner.spawnNewEnemy(posX, posY, EnemyMovementType.Launch);
+                this.groups.splice(i, 1);
             }
         }
     }
+
+    private trySpawnNewGroup(): void {
+        if (this.spawnTimer.tryFinishPeriod()) {
+            const defaultPosX: number = 200 * randomPositiveOrNegative();
+            const defaultPosY: number = 200 * randomPositiveOrNegative();
+
+            const enemies: Enemy[] = [];
+            const side: number = Math.ceil(Math.sqrt(this.enemiesToSpawn));
+            for (let i = 0; i < this.enemiesToSpawn; i++) {
+                const randomOffsetX: number = randomRange(-20, 20);
+                const randomOffsetY: number = randomRange(-20, 20);
+                const posX: number = defaultPosX + randomOffsetX + 50 * (i % side);
+                const posY: number = defaultPosY + randomOffsetY + 50 * Math.floor(i / side);
+                const enemy = this.enemySpawner.spawnNewEnemy(posX, posY, EnemyMovementType.Launch);
+                enemies.push(enemy);
+            }
+
+            this.groups.push({ enemies, lifeTimeLeft: this.enemyLifeTime });
+        }
+    }
+}
+
+class EnemyGroupWithLifetime {
+    public enemies: Enemy[];
+    public lifeTimeLeft: number;
 }