extends State
class_name EnemyState

@export var enemy : CharacterBody3D
@export var enemy_targets : Array[Area3D]
@export var move_speed : float = 3
@export var can_see : bool = false

func Enter():
	if enemy_targets != null:
		for target in enemy_targets:
			target.body_part_hit.connect(take_damage)

func Update(delta):
	if enemy.visibility_areas != null:
		for area in enemy.visibility_areas:
			var bodies = area.get_overlapping_bodies()
			if bodies != null:
				for i in bodies:
					enemy.point_of_interest = i.global_position
			else:
				enemy.point_of_interest = null
	
	if enemy.point_of_interest != null:
		enemy.line_of_sight_ray.look_at(enemy.point_of_interest)
		if enemy.line_of_sight_ray.is_colliding():
			if enemy.line_of_sight_ray.get_collider() is Player:
				if can_see:
					enemy.character_follow = enemy.line_of_sight_ray.get_collider()
					Transitioned.emit(self,"attack")
	

func take_damage(dam,bullet_damage):
	SignalBus.emit_signal("enemy_hit")
	enemy.health -= dam * bullet_damage
	enemy.health_bar_sprite.visible = true
	enemy.health_bar_sprite.health_update()
	var number_spawn = enemy.damage_number.instantiate()
	number_spawn.damage_amt = bullet_damage * dam
	number_spawn.position = enemy.global_position + Vector3(0,2,0)
	get_tree().get_root().add_child(number_spawn)
	
	if enemy.health <= 0:
		Transitioned.emit(self,"die")