extends SceneTree

var failures: Array[String] = []


func _init() -> void:
	_run.call_deferred()


func _run() -> void:
	var player := await _player_fixture()
	if player == null:
		_finish(null)
		return
	_set_beat_time(0.2)

	var basic_action: Resource = load("res://resources/actions/ground_attack_left_1.tres")
	player.call("_play_action_animation", "atk_ground_1", basic_action)
	var animation_player := player.get_node_or_null("AnimationPlayer") as AnimationPlayer
	if animation_player == null:
		failures.append("Player should include AnimationPlayer")
	else:
		_expect_float(float(animation_player.speed_scale), 1.75, 0.01, "AnimationPlayer actions should speed up to fit shortened beat durations")

	var smash_action: Resource = load("res://resources/actions/ground_smash_left.tres")
	player.call("_play_action_animation", "ground_smash", smash_action)
	player.call("_tick_manual_animation", 0.05)
	_expect_float(float(player.get("_manual_animation_time")), 0.1, 0.01, "Manual player action animation time should advance on the tempo-scaled action clock")

	_finish(player)


func _player_fixture() -> Node:
	var scene: PackedScene = load("res://scenes/characters/player.tscn")
	if scene == null:
		failures.append("Player scene should load")
		return null
	var player := scene.instantiate()
	root.add_child(player)
	await process_frame
	return player


func _set_beat_time(next_beat_time: float) -> void:
	var rhythm := root.get_node_or_null("RhythmManager")
	if rhythm == null:
		failures.append("RhythmManager autoload should exist")
		return
	rhythm.set("beat_time", next_beat_time)


func _expect_float(actual: float, expected: float, tolerance: float, label: String) -> void:
	if absf(actual - expected) > tolerance:
		failures.append("%s: expected %.3f, got %.3f" % [label, expected, actual])


func _finish(player: Node) -> void:
	if player != null:
		player.free()
	if failures.is_empty():
		print("PASS player action animation tempo")
		quit(0)
	else:
		for failure: String in failures:
			push_error(failure)
		quit(1)