extends Node2D

class_name Projectile

@export var Speed : float = 300
@export var RotationSpeed : float = 0
@export var Damage : float = 1
@export var Collider : Area2D
@export var Lifetime : float = 10

var Fraction = "none"
var DestinationAngle : float
var Target : Node2D = self

func _ready():
	get_tree().create_timer(Lifetime).timeout.connect(queue_free)
	Collider.body_entered.connect(_on_collision)
	areyouready()

func _physics_process(delta):
	if RotationSpeed == 0: DestinationAngle = global_rotation_degrees
	else: DestinationAngle = rad_to_deg(global_position.angle_to_point(Target.global_position))
	global_position += Speed * delta * global_transform.x
	var DestinationDifference : float
	if DestinationAngle - global_rotation_degrees == clamp(DestinationAngle - global_rotation_degrees, -180, 180):
		DestinationDifference = DestinationAngle - global_rotation_degrees
	else:
		DestinationDifference = global_rotation_degrees - DestinationAngle
	if DestinationDifference != clamp(DestinationDifference, -1, 1):
		global_rotation_degrees += sign(DestinationDifference) * RotationSpeed * delta
	else:
		global_rotation_degrees = DestinationAngle

func _on_collision(body):
	match body.collision_layer:
		1:
			if body.Fraction != Fraction:	
				if Target != self:
					Target.queue_free()
				body.Shield.deal_damage(Damage)
				queue_free()
		2:
			if Target != self:
				Target.queue_free()
			queue_free()
		

func areyouready():
	pass