extends SceneTree

# Hub-owned transporters supply an unfunded combat-vessel order without ever
# being crafted, stored at the mothership, or added to the player fleet.

var state: Node
var crafter_id: int
var initial_transporters: int
var total_at_start: int
var consumed: int = 0
var elapsed: float = 0.0
var conservation_broken: bool = false


func _initialize() -> void:
	state = root.get_node("GameState")
	state.buildings.clear()
	state.extractors.clear()
	state.transporters.clear()
	state.stored_vessels.clear()
	state.vessel_deliveries.clear()
	state.reset_progression()
	state.rocks = 200
	state.build_time_scale = 0.02
	state.unlocked = ["shipyards", "logistics", "freight"]
	state.add_building(state.BUILDING_MOTHERSHIP, Vector2.ZERO)
	crafter_id = state.add_building(state.BUILDING_SHIP_CRAFTER, Vector2(900, -300))

	if state.queue_order(crafter_id, state.VESSEL_TRANSPORTER):
		return _fail("the crafter accepted a logistics transporter order")
	var hub_id: int = state.add_building(state.BUILDING_TRANSPORT_HUB, Vector2(600, 200))
	initial_transporters = state.hub_capacity()
	if state.transporters.size() != initial_transporters:
		return _fail("hub provisioned %d transporters, expected %d" % [
			state.transporters.size(), initial_transporters])
	for transporter in state.transporters:
		if int(transporter.hub_id) != hub_id or transporter.state != state.TRANSPORTER_IDLE:
			return _fail("a provisioned transporter was not idle at its hub")

	var bank_before: int = state.rocks
	if not state.queue_order(crafter_id, state.PRODUCT_SHIP):
		return _fail("crafter refused the combat-vessel order")
	if state.rocks != bank_before:
		return _fail("placing the order changed the bank before a transporter loaded")
	state.order_completed.connect(_on_order_completed)
	total_at_start = _total()


func _process(delta: float) -> bool:
	elapsed += delta
	if _total() + consumed != total_at_start:
		conservation_broken = true
	if state.pending_orders(crafter_id) > 0:
		if elapsed > 25.0:
			return _fail("hub transporters never supplied the queued order")
		return false
	if conservation_broken:
		return _fail("ore was created or destroyed on the automatic route")
	if state.transporters.size() != initial_transporters:
		return _fail("transporters accumulated during delivery")
	if state.stored_vessels.has(state.VESSEL_TRANSPORTER):
		return _fail("a transporter appeared in the mothership hangar")
	print("%d hub-owned transporters supplied the crafter automatically" % initial_transporters)
	print("TEST_TRANSPORTER_SUPPLY: PASS")
	quit(0)
	return true


func _on_order_completed(_building_id: int, product: String) -> void:
	consumed += state.product_cost(product)


func _total() -> int:
	var sum: int = state.rocks + state.fleet_cargo
	for building in state.buildings:
		if building.type != state.BUILDING_MOTHERSHIP:
			sum += state.building_resource(int(building.id), state.RESOURCE_ORE)
		for order in building.get("orders", []):
			if bool(order.started):
				sum += state.product_cost(String(order.product))
	for transporter in state.transporters:
		sum += int(transporter.get("carrying", 0))
	return sum


func _fail(message: String) -> bool:
	print("TEST_TRANSPORTER_SUPPLY: FAIL (%s)" % message)
	quit(1)
	return true