extends Node2D

class_name Projectile

@export var speed : float = 300
@export var rotation_speed : float = 0
@export var damage : float = 1
@export var collider : Area2D
@export var lifetime : float = 10

var faction: Game.Faction = Game.Faction.None
var destination_angle : 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 rotation_speed == 0: destination_angle = global_rotation_degrees
	else: destination_angle = rad_to_deg(global_position.angle_to_point(target.global_position))
	global_position += speed * delta * global_transform.x
	var destination_difference : float
	if abs(destination_angle - global_rotation_degrees) <= 180:
		destination_difference = destination_angle - global_rotation_degrees
	else:
		destination_difference = global_rotation_degrees - destination_angle
	if destination_difference != clamp(destination_difference, -1, 1):
		global_rotation_degrees += sign(destination_difference) * rotation_speed * delta
	else:
		global_rotation_degrees = destination_angle

func _on_collision(body):
	match body.collision_layer:
		1:
			if body.ship.faction != faction:
				if target != self:
					target.queue_free()
				body.ship.shield.deal_damage(damage)
				queue_free()
		2:
			if target != self:
				target.queue_free()
			queue_free()

func areyouready():
	pass