extends CharacterBody2D

@export var speed = 100.0
@export var patrol_points: Array[Marker2D] = []
var current_point_index = 0

@onready var detection_area: Area2D = $Area2D  # Reference to the detection area
var player: Node2D = null  # Reference to the player, initially set to null

func _ready() -> void:
    if patrol_points.size() == 0:
        print("No patrol points assigned!")

    detection_area.body_entered.connect(_on_player_detected)
    detection_area.body_exited.connect(_on_player_lost)

func _on_player_detected(body: Node2D) -> void:
    if body.name == "Player":
        player = body  # Set the player reference when detected

func _on_player_lost(body: Node2D) -> void:
    if body == player:
        player = null  # Reset the player reference when they leave

func _process(delta: float) -> void:
    if player:
        chase_player()  # If a player is detected, chase them
    else:
        patrol()  # Call the patrol function every frame
    move_and_slide()  # Apply movement to the enemy

func chase_player() -> void:
    velocity = (player.global_position - global_position).normalized() * speed

func patrol() -> void:
    if patrol_points.size() > 0:
        var target = patrol_points[current_point_index].position
        velocity = (target - position).normalized() * speed

        if position.distance_to(target) < 10.0:
            current_point_index += 1
            if current_point_index >= patrol_points.size():
                current_point_index = 0