class_name WeaponController extends Node3D
@export_category("WeaponController")

# ---------------------------------------------------------------------
# Main weapon params
# ---------------------------------------------------------------------
@export var damage: int = 0
# cooldown interval in seconds
@export var cooldown: float = 0
# bullet speed in m/s
@export var bullet_speed: int = 0
@export var bullet_spread_script: Resource

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	if bullet_spread_script:
		bullet_spread_script = bullet_spread_script.new()
		bullet_spread_script.reset_spread()
@onready var bullet_trace_distance: Node3D = $BulletTraceDistance
@onready var bullet_trail_end: Node3D = $BulletTrailEnd

func shoot() -> Error:
	var bullet_start_node: Node3D = bullet_trace_distance.find_child("Start")
	var bullet_end_node: Node3D = bullet_trace_distance.find_child("End")
	if bullet_start_node and bullet_end_node:
		var direction: Vector3 = bullet_end_node.position 
		if bullet_spread_script:
			var spread_offset: Vector3 = bullet_spread_script.get_spread_offset()
			direction += spread_offset
			direction = direction.normalized()
		var path := "res://scenes/weapon/misc/bullet_trail_generic.tscn"
		if not ResourceLoader.exists(path):
			return ERR_DOES_NOT_EXIST
		var scene: PackedScene = ResourceLoader.load(path)
		if not scene.can_instantiate():
			return ERR_CANT_OPEN
		var bullet_distance: float = 100
		var bullet_end_position: Vector3 = bullet_start_node.position + direction * bullet_distance
		var node: MeshInstance3D = scene.instantiate()
		node.init(bullet_start_node.position, bullet_end_position)
		#var root := get_tree().get_root()
		bullet_start_node.add_child(node)
		return OK
	else:
		push_warning("Couldn't generate a bullet trace, no distance node found")
		return ERR_BUG
	# -- TODO: It should not be hardcoded
	
# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	pass

func reset_spread() -> void:
	if bullet_spread_script:
		bullet_spread_script.reset_spread()