extends RigidBody3D

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

@onready var mesh = $Cylinder
@onready var particles = $GPUParticles3D
@onready var enemy_particles = $GPUParticlesEnemy
@onready var hit_indicator = $Audio/HitIndicator
@onready var ray: RayCast3D = $RayCast3D
@onready var water_leak : Resource = preload("res://assets/water_leak.tscn")

# Called when the node enters the scene tree for the first time.
func _ready():
	
	visible = false
	linear_velocity += transform.basis * Vector3(0, 0, -bullet_speed) + player_velocity

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _physics_process(delta):
	
	angular_velocity = Vector3(0,0,0)
	
	distance_from_player = abs(self.global_position - player_position)
	
	if distance_from_player.length() > 2:
		visible = true
		
	if ray.is_colliding():
		var body = ray.get_collider()
		if body != null and !body.is_in_group("player"):
			
			mesh.visible = false
			ray.enabled = false
			
			if body.has_method("hit"):
				hit_indicator.play()
				enemy_particles.emitting = true
				ray.get_collider().hit(bullet_damage)
			
			#bullethole effect
			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())
			instance_bullethole.rotation.z = deg_to_rad(randf_range(0,360))
			
			# Leaking effect
			if body.is_in_group("leak"):
				var leakspawn = water_leak.instantiate()
				body.add_child(leakspawn)
				leakspawn.global_transform.origin = ray.get_collision_point()
				if (abs(ray.get_collision_normal().y) > 0.99):
					leakspawn.look_at(ray.get_collision_point() + ray.get_collision_normal(), Vector3(0,0,1))
				else:
					leakspawn.look_at(ray.get_collision_point() + ray.get_collision_normal())
				leakspawn.rotation.z = deg_to_rad(randf_range(0,360))
				
			if body.is_in_group("switch"):
				body.hit(bullet_damage)
			
			if body.is_in_group("breakable"):
				var current_velocity = transform.basis * Vector3(0,0,-1 * bullet_force_mod)
				ray.get_collider().breaking(current_velocity)
				
			queue_free()

func _on_body_entered(body: Node) -> void:
	if !body.is_in_group("player"):
		await get_tree().create_timer(.1).timeout
		mesh.visible = false

func despawn():
	queue_free()