extends SceneTree
## Boss 回归测试（时间驱动，与无头模式实际帧率无关）：
## A) 独立 Boss：5s 内进场并开始弹幕；秒杀后 4s 内完成爆炸链释放
## B) Game 集成：spawn_boss 血条显示→击杀后血条隐藏、得分 +5000
## 运行：godot --headless -s tests/boss_test.gd

var _phase := 0
var _time := 0.0
var _boss: Boss
var _game: Game
var _bullets: Node2D
var _bullet_time := 0.0
var _phase_time := 0.0
var _score_before := 0
var _fails: Array[String] = []


func _initialize() -> void:
	_bullets = Node2D.new()
	_bullets.add_to_group("enemy_bullets")
	root.add_child(_bullets)
	_boss = Boss.new()
	_boss.setup(1.0)
	root.add_child(_boss)
	print("[boss_test] phase A: standalone boss")


func _fail(msg: String) -> void:
	_fails.append(msg)
	print("[FAIL] " + msg)


func _process(delta: float) -> bool:
	_time += delta
	_phase_time += delta
	match _phase:
		0:
			if _bullets.get_child_count() > 0:
				_bullet_time += delta
			if _phase_time >= 5.0:
				if not _boss._entered:
					_fail("boss did not enter (pos.y=%.1f)" % _boss.position.y)
				if _bullet_time < 0.4:
					_fail("boss fired too little (%.2fs bullet time)" % _bullet_time)
				_boss.apply_damage(99999)
				_next_phase()
		1:
			if not is_instance_valid(_boss):
				print("[boss_test] phase A done: %.2fs bullet time, death chain freed boss" % _bullet_time)
				_next_phase()
			elif _phase_time > 4.0:
				_fail("death chain did not free boss in 4s")
				_next_phase()
		2:
			_game = (load("res://scenes/game.tscn") as PackedScene).instantiate()
			root.add_child(_game)
			_score_before = _game.score
			_boss = _game.spawn_boss(1.0)
			if not _game._boss_bar_bg.visible:
				_fail("boss bar not shown after spawn")
			_boss.apply_damage(99999)
			_next_phase()
		3:
			if _phase_time >= 4.0:
				if _game._boss_bar_bg.visible:
					_fail("boss bar still visible after death")
				if _game.score < _score_before + 5000:
					_fail("score not credited: %d -> %d" % [_score_before, _game.score])
				else:
					print("[boss_test] phase B done: score %d -> %d" % [_score_before, _game.score])
				if _fails.is_empty():
					print("[boss_test] PASS")
				else:
					print("[boss_test] FAIL: %d issue(s)" % _fails.size())
				quit(0 if _fails.is_empty() else 1)
				return true
	return false


func _next_phase() -> void:
	_phase += 1
	_phase_time = 0.0