extends SceneTree

var failures := 0


func _initialize() -> void:
	call_deferred("_run")


func _run() -> void:
	var account_profile = root.get_node("AccountProfileService")
	var ccs_service = root.get_node("CCSService")
	var prior_preferences: Dictionary = account_profile.preferences.duplicate(true)
	var prior_ccs_scale: float = ccs_service.text_scale
	account_profile.preferences["questionTextScale"] = 1.0
	ccs_service.text_scale = 1.0

	var host := Control.new()
	root.add_child(host)
	var screen = load("res://scripts/ui/settings_screen.gd").new()
	screen.main = host
	host.add_child(screen)
	await process_frame

	_assert(screen.question_scale_value_label != null, "settings should expose a question bank text size control")
	_assert(screen.ccs_scale_value_label != null, "settings should expose a CCS case text size control")
	_assert(screen.question_scale_value_label.text == "100%", "question bank text size should start at 100%")
	_assert(screen.ccs_scale_value_label.text == "100%", "CCS case text size should start at 100%")

	_assert(_find_button(screen, "A+", 0) != null, "question bank row should have an A+ button")
	_assert(_find_button(screen, "A+", 1) != null, "CCS row should have an A+ button")

	var prior_profile_api_url: String = ProjectSettings.get_setting("step3/profile_api_url", "")
	ProjectSettings.set_setting("step3/profile_api_url", "http://127.0.0.1:1")

	# Call the handlers directly rather than emitting Button.pressed - the real
	# signal path also fires UISoundService's click sound, whose OGG playback
	# doesn't release cleanly before this short-lived headless process exits.
	screen._adjust_question_text_scale(0.1)
	_assert(is_equal_approx(float(account_profile.preferences.get("questionTextScale", 1.0)), 1.1), "question bank A+ should increase the synced scale")
	_assert(screen.question_scale_value_label.text == "110%", "question bank text size label should reflect the new scale")

	screen._adjust_ccs_text_scale(0.1)
	_assert(is_equal_approx(ccs_service.text_scale, 1.1), "CCS A+ should increase the shared CCS text scale")
	_assert(screen.ccs_scale_value_label.text == "110%", "CCS text size label should reflect the new scale")

	ProjectSettings.set_setting("step3/profile_api_url", prior_profile_api_url)
	host.queue_free()
	await process_frame
	account_profile.preferences = prior_preferences
	ccs_service.text_scale = prior_ccs_scale
	quit(1 if failures > 0 else 0)


func _find_button(root_node: Node, text: String, occurrence: int) -> Button:
	var found := 0
	for node in root_node.find_children("*", "Button", true, false):
		if node.text == text:
			if found == occurrence:
				return node
			found += 1
	return null


func _assert(condition: bool, message: String) -> void:
	if condition:
		return
	failures += 1
	push_error(message)