extends SceneTree

# Logistics travels at a readable pace rather than teleporting: the ceiling
# below is the rule, and each leg has to actually advance at the speed its own
# stat claims.
#
# The expected progress is DERIVED from that stat rather than written out,
# because the numbers are tuned: #217 slowed transporters from 150 to 120 and
# a hardcoded window failed for a change it was not about. What must not drift
# is the ceiling, and the agreement between the stat and the movement.


func _initialize() -> void:
	var state: Node = root.get_node("GameState")
	state.vessel_deliveries.clear()
	state.transporters.clear()
	state.buildings.clear()
	state.reset_progression()
	var delivery_speed: float = state.vessel_stat("interceptor", "delivery_speed")
	var transport_speed: float = state.transporter_speed()
	if delivery_speed >= 300.0 or transport_speed >= 300.0:
		return _fail("logistics still rushes at delivery %.0f / transport %.0f" % [delivery_speed, transport_speed])

	state.vessel_deliveries.append({"type": "interceptor", "from": Vector2.ZERO,
		"to": Vector2(900, 0), "progress": 0.0})
	state._advance_vessel_deliveries(1.0)
	var delivery_progress: float = state.vessel_deliveries[0].progress
	var delivery_expected: float = delivery_speed / 900.0
	if absf(delivery_progress - delivery_expected) > 0.01:
		return _fail("900-unit delivery advanced %.3f in one second at %.0f u/s, expected %.3f" \
			% [delivery_progress, delivery_speed, delivery_expected])

	state.transporters.append({"hub_id": 0, "state": state.TRANSPORTER_RETURNING,
		"target_id": 0, "carrying": 0, "progress": 0.0,
		"from": Vector2.ZERO, "to": Vector2(600, 0)})
	state._advance_transporters(1.0)
	var transport_progress: float = state.transporters[0].progress
	var transport_expected: float = transport_speed / 600.0
	if absf(transport_progress - transport_expected) > 0.01:
		return _fail("600-unit transport leg advanced %.3f in one second at %.0f u/s, expected %.3f" \
			% [transport_progress, transport_speed, transport_expected])

	print("delivery %.0f u/s, transporter %.0f u/s" % [delivery_speed, transport_speed])
	print("TEST_LOGISTICS_TRAVEL_SPEED: PASS")
	quit(0)


func _fail(message: String) -> void:
	print("TEST_LOGISTICS_TRAVEL_SPEED: FAIL (%s)" % message)
	quit(1)