extends Node3D

var bullet_speed
var bullet_drop
var random_spread_amt
var bullet_damage
var instance_bullethole
var gun

@onready var mesh = $gunbullet1
@onready var ray = $RayCast3D
@onready var particles = $GPUParticles3D
@onready var enemy_particles = $GPUParticlesEnemy
@onready var timer = $Timer
@onready var gunbullet1 = $gunbullet1/Cylinder
@onready var hit_indicator = $Audio/HitIndicator



var rng = RandomNumberGenerator.new()
var av_x
var av_y
var av_z

# Called when the node enters the scene tree for the first time.
func _ready():
	
	#apply random rotation
	av_x = deg_to_rad(rng.randf_range(-random_spread_amt,random_spread_amt))
	av_y = deg_to_rad(rng.randf_range(-random_spread_amt,random_spread_amt))
	av_z = deg_to_rad(rng.randf_range(-random_spread_amt,random_spread_amt))
	rotation += Vector3(av_x,av_y,av_z)
	timer.start()
	visible = false


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	position += transform.basis * Vector3(0, 0, -bullet_speed) * delta
	rotation.x = clamp(rotation.x - delta * bullet_drop,deg_to_rad(-90),deg_to_rad(90))
	
	await get_tree().create_timer(.02).timeout
	visible = true
	
	
	if ray.is_colliding() and !ray.get_collider().is_in_group("player"):
		
		mesh.visible = false
		ray.enabled = false
		
		#bullethole effect
		#instance_bullethole = gun.bullethole.instantiate()
		ray.get_collider().add_child(instance_bullethole)
		instance_bullethole.global_transform.origin = ray.get_collision_point()
		instance_bullethole.look_at(ray.get_collision_point() + ray.get_collision_normal(), Vector3.UP)
		
		#move rigidbodies
		if ray.get_collider().is_in_group("scene_rigidbody"):
			ray.get_collider().linear_velocity += transform.basis * Vector3(0,0,-1 * 5)
		
		if ray.get_collider().is_in_group("enemy"):
			print("enemy hit")
			hit_indicator.play()
			enemy_particles.emitting = true
			ray.get_collider().hit()
		await get_tree().create_timer(1.0).timeout
		queue_free()