extends Area3D

@export var billboard = true
@onready var sprite: Sprite3D = $UiSprite
@onready var viewport: SubViewport = $UiSprite/SubViewport

func _process(_delta):
    if billboard:
        var camera = get_viewport().get_camera_3d()
        
        var up = (camera.global_position - global_position)
        up = up.cross(Vector3.UP).cross(up)
        
        look_at(global_position - (camera.global_position - global_position), up)

func _unhandled_input(event):
    viewport.push_input(event)

func _on_input_event(_camera: Camera3D, event: InputEvent, pos: Vector3, _normal: Vector3, _shape_idx: int):
    # Position of the event in Sprite3D local coordinates.
    var texture_3d_position = sprite.get_global_transform().affine_inverse() * pos
    #if !is_zero_approx(texture_3d_position.z):
    #    # Discard event because event didn't happen on the side of the Sprite3D.
    #    return
    # Position of the event relative to the texture.
    var texture_position: Vector2 = Vector2(texture_3d_position.x, -texture_3d_position.y) / sprite.pixel_size - sprite.get_item_rect().position
    # Send mouse event.
    var e: InputEvent = event.duplicate()
    if e is InputEventMouse:
        e.set_position(texture_position)
        e.set_global_position(texture_position)
        viewport.push_input(e)

func _on_button_pressed():
    print("Button pressed")

func _on_line_edit_text_submitted(new_text):
    print("Text submitted: ", new_text)