extends SceneTree

# Headless test: run with
#   godot --headless -s res://tests/test_joystick_recentres.gd
# Both sticks float: the base jumps to wherever the finger lands, so a player
# does not have to hit an exact spot on a screen they cannot feel. Releasing
# used to put only the KNOB back onto the base, leaving the base parked
# wherever that touch had been - so an idle stick sat off-centre, in a
# different place every time, and read as a control still in use.
#
# Covers, for the movement stick AND the fire stick:
#   A. an untouched stick sits in the middle of its own rect
#   B. pressing off-centre moves the base there - the floating behaviour is
#      still intact, which is the thing this must not break
#   C. releasing puts base AND knob back in the middle
#   D. releasing also clears the reported direction, so nothing keeps acting
#      on a stick nobody is holding

const OFFSET := Vector2(-58.0, 41.0)

var main: Node
var stage: int = 0
var elapsed: float = 0.0


func _initialize() -> void:
	main = load("res://Main.tscn").instantiate()
	root.add_child(main)
	current_scene = main


func _check(stick: Control, label: String) -> bool:
	var home: Vector2 = stick.home_pos()

	# --- A. idle means centred -------------------------------------------
	if stick.base_pos.distance_to(home) > 0.01 or stick.knob_pos.distance_to(home) > 0.01:
		return _fail("%s starts at base %s knob %s, expected both at %s" \
			% [label, stick.base_pos, stick.knob_pos, home])

	# --- B. it still floats to the finger ---------------------------------
	var press := InputEventScreenTouch.new()
	press.index = 2
	press.pressed = true
	press.position = stick.global_position + home + OFFSET
	if not stick.handle_touch(press):
		return _fail("%s refused a touch inside its own rect" % label)
	if stick.base_pos.distance_to(home + OFFSET) > 0.01:
		return _fail("%s did not float its base to the finger: base %s, expected %s" \
			% [label, stick.base_pos, home + OFFSET])

	var drag := InputEventScreenDrag.new()
	drag.index = 2
	drag.position = press.position + Vector2(stick.max_radius, 0.0)
	stick.handle_drag(drag)
	if stick.direction == Vector2.ZERO:
		return _fail("%s reported no direction while pushed" % label)
	if stick.knob_pos.distance_to(stick.base_pos) < stick.max_radius * 0.5:
		return _fail("%s knob barely moved while pushed" % label)

	# --- C/D. release recentres everything and stops reporting ------------
	var release := InputEventScreenTouch.new()
	release.index = 2
	release.pressed = false
	release.position = drag.position
	stick.handle_touch(release)
	if stick.base_pos.distance_to(home) > 0.01:
		return _fail("%s left its base at %s after release, expected %s" \
			% [label, stick.base_pos, home])
	if stick.knob_pos.distance_to(home) > 0.01:
		return _fail("%s left its knob at %s after release, expected %s" \
			% [label, stick.knob_pos, home])
	if stick.direction != Vector2.ZERO:
		return _fail("%s still reports %s after release" % [label, stick.direction])
	if stick.is_active():
		return _fail("%s still claims to be held after release" % label)
	print("%s: floats to the finger, and returns to centre on release" % label)
	return true


func _process(delta: float) -> bool:
	elapsed += delta
	if stage != 0:
		return false
	if elapsed < 0.2:
		return false
	stage = 1
	if not _check(main.get_node("UI/Joystick"), "movement stick"):
		return true
	if not _check(main.get_node("UI/FireStick"), "fire stick"):
		return true
	print("TEST_JOYSTICK_RECENTRES: PASS")
	quit(0)
	return true


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