extends RigidBody3D

@export var collision_shape : Node

var bullet_speed
var bullet_drop
var random_spread_amt
var bullet_damage
var instance_bullethole
var bullet_force_mod = 1.0
var distance_from_player
var player_position
var player_velocity
var bullet_active = true
var bullet_target : Node

@onready var mesh = $Cylinder
@onready var particles = $GPUParticles3D
@onready var enemy_particles = $GPUParticlesEnemy
@onready var hit_indicator = $Audio/HitIndicator
@onready var ray: RayCast3D = $RayCast3D

# Called when the node enters the scene tree for the first time.
func _ready():
	linear_velocity += player_velocity
	visible = false

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _physics_process(delta):
	linear_velocity = transform.basis * Vector3(0, 0, -bullet_speed)
	
	if bullet_target != null:
		look_at(bullet_target.global_position)
	
	distance_from_player = abs(self.global_position - player_position)
	
	if distance_from_player.length() > 1.5:
		visible = true
	
func _on_body_entered(body: Node) -> void:
	
	if !body.is_in_group("player"):
		
		ray.enabled = false
		
		if ray.is_colliding():
			var ray_body = ray.get_collider()
			if ray_body != null:
				#bullethole effect
				ray_body.add_child(instance_bullethole)
				instance_bullethole.global_transform.origin = ray.get_collision_point()
				if (abs(ray.get_collision_normal().y) > 0.99):
					instance_bullethole.look_at(ray.get_collision_point() + ray.get_collision_normal(), Vector3(0,0,1))
				else:
					instance_bullethole.look_at(ray.get_collision_point() + ray.get_collision_normal())
		
	if body.is_in_group("switch"):
		body.hit()
	
	
	if body.is_in_group("breakable"):
		var current_velocity = transform.basis * Vector3(0,0,-1 * bullet_force_mod)
		body.breaking(current_velocity)
	despawn()

func despawn():
	queue_free()