extends SceneTree

var failures: Array[String] = []


func _init() -> void:
	var scene: PackedScene = load("res://scenes/main/main.tscn")
	if scene == null:
		push_error("Could not load main.tscn")
		quit(1)
		return
	
	var main: Node = scene.instantiate()
	get_root().add_child(main)
	var player: Node = main.get_node_or_null("Player")
	if player == null:
		failures.append("Missing Player")
	elif not player.has_signal("combo_window_cleared"):
		failures.append("Player should expose combo_window_cleared")
	
	if not main.has_method("_play_combo_clear_animation"):
		failures.append("Main should implement _play_combo_clear_animation")
	if not main.has_method("_on_energy_changed"):
		failures.append("Main should implement _on_energy_changed")
	if not main.has_method("_on_health_changed"):
		failures.append("Main should implement _on_health_changed")
	if not main.has_method("_on_charge_changed"):
		failures.append("Main should implement _on_charge_changed")
	
	var status_bars: Node = main.get_node_or_null("RhythmFeedback/StatusBars")
	if status_bars == null:
		failures.append("Missing StatusBars")
	else:
		var health_bar := status_bars.get_node_or_null("HealthBar")
		if health_bar == null:
			failures.append("Missing HealthBar")
		elif not health_bar is ProgressBar:
			failures.append("HealthBar should be a ProgressBar")
		var energy_bar := status_bars.get_node_or_null("EnergyBar")
		if energy_bar == null:
			failures.append("Missing EnergyBar")
		else:
			for index: int in range(10):
				var segment := energy_bar.get_node_or_null("Segment%d" % index)
				if segment == null:
					failures.append("Missing energy segment %d" % index)
				elif not segment is Panel:
					failures.append("Energy segment %d should be a Panel" % index)
		var charge_bar := status_bars.get_node_or_null("ChargeBar")
		if charge_bar == null:
			failures.append("Missing ChargeBar")
		elif not charge_bar is ProgressBar:
			failures.append("ChargeBar should be a ProgressBar")
		elif main.has_method("_on_charge_changed") and main.has_method("_update_charge_bar_flash"):
			main.set("charge_bar", charge_bar)
			main.call("_on_charge_changed", 1.1, 1.1, true, true)
			main.call("_update_charge_bar_flash", 0.13)
			var flashing_alpha: float = charge_bar.modulate.a
			main.call("_on_charge_changed", 1.1, 1.1, true, true)
			if is_equal_approx(charge_bar.modulate.a, 1.0):
				failures.append("Ready charge updates should not reset ChargeBar flash alpha")
			if not is_equal_approx(charge_bar.modulate.a, flashing_alpha):
				failures.append("Ready charge updates should preserve ChargeBar flash alpha")
	
	var combo_window: Node = main.get_node_or_null("RhythmFeedback/ComboWindow")
	if combo_window == null:
		failures.append("Missing ComboWindow")
	else:
		for index: int in range(4):
			var slot := combo_window.get_node_or_null("Slot%d" % index)
			if slot == null:
				failures.append("Missing visual slot %d" % index)
				continue
			if not slot is PanelContainer:
				failures.append("Slot%d should be a PanelContainer" % index)
			if slot.get_node_or_null("Key") == null:
				failures.append("Slot%d should contain Key label" % index)
	
	main.free()
	
	if failures.is_empty():
		print("PASS combo hud")
		quit(0)
	else:
		for failure: String in failures:
			push_error(failure)
		quit(1)