extends Node2D

# Purely visual: a transport vessel running a hub -> mothership -> building
# supply route. Carries no state of its own; GameState owns the simulation
# and TransporterField creates, positions and frees this to match.

const HULL_COLOR: Color = Color(0.95, 0.55, 0.85)

var laden: bool = false


func _ready() -> void:
	add_to_group("transporters")
	z_index = -1
	queue_redraw()


func set_laden(value: bool) -> void:
	if laden == value:
		return
	laden = value
	queue_redraw()


func _draw() -> void:
	# Squat and boxy, in the transport hub's own magenta, so it reads as
	# "belongs to the hub" and not as an extractor hauler (green) or a fleet
	# vessel (sharp cyan triangle).
	var hull: PackedVector2Array = PackedVector2Array([
		Vector2(0, -16), Vector2(10, -4), Vector2(10, 14), Vector2(-10, 14), Vector2(-10, -4),
	])
	NeonDraw.draw_glowing_polygon(self, hull, HULL_COLOR, 1.0)
	if laden:
		# A visible payload, so a loaded run is distinguishable from a
		# deadhead back to the hub at a glance.
		NeonDraw.draw_glowing_polygon(self, PackedVector2Array([
			Vector2(-5, 0), Vector2(5, 0), Vector2(5, 9), Vector2(-5, 9),
		]), HULL_COLOR, 0.85)