extends Unit
class_name Enemy

@export var flock_push := 20.0

@onready var vision_area: Area2D = $VisionArea

var can_move := true


# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	if not can_move:
		return
	
	if not can_move_forwards_player():
		return
	
	position += get_move_direction() * stats.speed * delta
	
	update_rotate()
		
	
func get_move_direction() -> Vector2:
	
	if not is_instance_valid(Global.player):
		return Vector2.ZERO
	
	var direction := global_position.direction_to(Global.player.position)
	
	for area: Node2D in vision_area.get_overlapping_areas():
		if area != self and area.is_inside_tree():
			var vector := global_position - area.global_position
			direction += flock_push * vector.normalized() / vector.length()
	
	return direction
	
func update_rotate() -> void:
	if is_instance_valid(Global.player):
		return 
		
	var player_pos := Global.player.position
	
	var moving_right := global_position.x < player_pos.x
	visuals.scale = Vector2(-0.5,0.5) if moving_right else Vector2(0.5,0.5)
	
func can_move_forwards_player() -> bool:
	return is_instance_valid(Global.player) and\
	global_position.distance_to(Global.player.position) > 60