extends SceneTree

# A logistics vessel is ONE vessel, so it looks the same wherever it is drawn.
#
# #216 made transporters and repair drones fly out from the mothership as
# ordinary vessel deliveries. A delivery draws the hull off the vessel
# DEFINITION; the stationed nodes each drew a copy written into their own
# script. The copies had drifted - the transporter's definition declared no
# hull at all, so one in flight was an empty polygon, and the drone's two
# shapes differed by a couple of units - which is why a transporter changed
# shape the moment it was assigned.
#
# Covers:
#   A. every vessel that can be delivered declares a hull to be drawn by
#   B. the stationed node draws that same hull, not a second copy
#   C. and the colours agree, so it does not change livery either

const DELIVERABLE: Array = ["transporter", "repair_drone"]


func _initialize() -> void:
	var definitions: Script = load("res://vessels/VesselDefinitions.gd")
	var nodes: Dictionary = {
		"transporter": load("res://logistics/Transporter.gd"),
		"repair_drone": load("res://logistics/RepairDrone.gd"),
	}

	for vessel_type in DELIVERABLE:
		var definition: Resource = definitions.get_definition(vessel_type)
		if definition == null:
			return _fail("no definition for '%s'" % vessel_type)

		# --- A. there is a hull at all -------------------------------
		# An empty one is not a small bug: VesselDelivery draws exactly this,
		# so a vessel with no hull is invisible for the whole flight.
		if definition.hull_points.is_empty():
			return _fail("'%s' declares no hull, so it is invisible in flight" % vessel_type)

		# --- B. and the stationed node draws that one ----------------
		var node: Node2D = nodes[vessel_type].new()
		root.add_child(node)
		var drawn: PackedVector2Array = node._hull()
		node.free()
		if drawn != definition.hull_points:
			return _fail("'%s' is drawn as %s at its post and %s in flight" \
				% [vessel_type, drawn, definition.hull_points])

		# --- C. same livery too ---------------------------------------
		var node_colour: Color = nodes[vessel_type].HULL_COLOR
		var definition_colour: Color = definition.glow_color
		if not is_equal_approx(node_colour.r, definition_colour.r) \
				or not is_equal_approx(node_colour.g, definition_colour.g) \
				or not is_equal_approx(node_colour.b, definition_colour.b):
			return _fail("'%s' is %s at its post and %s in flight" \
				% [vessel_type, node_colour, definition_colour])
		print("%s: one hull of %d points, one colour, both places" \
			% [vessel_type, definition.hull_points.size()])

	print("TEST_LOGISTICS_HULL_IDENTITY: PASS")
	quit(0)


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