From 7478f4bb1f34534cc6596d68a5875892a1cdb983 Mon Sep 17 00:00:00 2001
From: Renge <renge@marmot.website>
Date: Sun, 24 Apr 2022 20:15:34 -0400
Subject: [PATCH] feat: implemented alert

---
 src/shattered_sword/AI/EnemyAI.ts            |  5 ++-
 src/shattered_sword/AI/EnemyStates/Alert.ts  | 33 ++++++++++++++++++++
 src/shattered_sword/AI/EnemyStates/Patrol.ts |  3 ++
 3 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 src/shattered_sword/AI/EnemyStates/Alert.ts

diff --git a/src/shattered_sword/AI/EnemyAI.ts b/src/shattered_sword/AI/EnemyAI.ts
index 3779494..0c69eca 100644
--- a/src/shattered_sword/AI/EnemyAI.ts
+++ b/src/shattered_sword/AI/EnemyAI.ts
@@ -9,6 +9,7 @@ import Weapon from "../GameSystems/items/Weapon";
 import BattlerAI from "./BattlerAI";
 
 import Patrol from "./EnemyStates/Patrol";
+import Alert from "./EnemyStates/Alert";
 import { GameState, Statuses } from "../sword_enums";
 
 import Sprite from "../../Wolfie2D/Nodes/Sprites/Sprite";
@@ -32,6 +33,8 @@ export default class EnemyAI extends StateMachineAI implements BattlerAI {
     /** The default movement speed of this AI */
     speed: number = 20;
 
+    maxSpeed: number = 40;
+
     /** The weapon this AI has */
     weapon: Weapon;
 
@@ -81,7 +84,7 @@ export default class EnemyAI extends StateMachineAI implements BattlerAI {
         //add states
          // Patrol mode
         this.addState(EnemyStates.PATROL, new Patrol(this, owner));
-        // this.addState(EnemyStates.ALERT,)
+        this.addState(EnemyStates.ALERT, new Alert(this, owner));
         
         this.maxHealth = options.health;
 
diff --git a/src/shattered_sword/AI/EnemyStates/Alert.ts b/src/shattered_sword/AI/EnemyStates/Alert.ts
new file mode 100644
index 0000000..d51876d
--- /dev/null
+++ b/src/shattered_sword/AI/EnemyStates/Alert.ts
@@ -0,0 +1,33 @@
+import EnemyAI, { EnemyStates } from "../EnemyAI";
+import EnemyState from "./EnemyState";
+import Sprite from "../../../Wolfie2D/Nodes/Sprites/Sprite";
+import AnimatedSprite from "../../../Wolfie2D/Nodes/Sprites/AnimatedSprite";
+
+export default class Alert extends EnemyState {
+    onEnter(options: Record<string, any>): void {
+        (<AnimatedSprite>this.owner).animation.playIfNotAlready("IDLE", true);
+    }
+
+    update(deltaT: number): void {
+        if(!this.canWalk()){
+            this.parent.direction *= -1;
+        }
+
+        let position = this.parent.getPlayerPosition();
+        if (position) {
+            this.parent.velocity.x = this.parent.maxSpeed * Math.sign(position.x - this.owner.position.x);
+        }
+        else {
+            this.parent.velocity.x = 0;
+            this.finished(EnemyStates.PATROL);
+        }
+
+        (<Sprite>this.owner).invertX = this.parent.velocity.x > 0 ? true : false ;
+        super.update(deltaT);
+    }
+
+    onExit(): Record<string, any> {
+        (<AnimatedSprite>this.owner).animation.stop();
+        return null;
+    }
+}
\ No newline at end of file
diff --git a/src/shattered_sword/AI/EnemyStates/Patrol.ts b/src/shattered_sword/AI/EnemyStates/Patrol.ts
index 173159a..245b809 100644
--- a/src/shattered_sword/AI/EnemyStates/Patrol.ts
+++ b/src/shattered_sword/AI/EnemyStates/Patrol.ts
@@ -24,6 +24,9 @@ export default class Patrol extends EnemyState {
         this.parent.velocity.x = this.parent.direction * this.parent.speed;
         (<Sprite>this.owner).invertX = this.parent.direction === 1 ? true : false ;
 
+        if (this.parent.getPlayerPosition()) {
+            this.finished(EnemyStates.ALERT);
+        }
         super.update(deltaT);
     }