extends SceneTree
## 海面覆盖回归测试：滚动两个完整周期（1200 帧），
## 逐帧断言贴图联合覆盖包含整屏 Rect2(0,0,540,960)。
## 运行：godot --headless -s tests/ocean_test.gd

const SCREEN := Rect2(0.0, 0.0, 540.0, 960.0)
const TILE_HALF := Vector2(270.0, 270.0)
const FRAMES := 1200

var _ocean: OceanScroll
var _frames := 0
var _fails := 0


func _initialize() -> void:
	_ocean = OceanScroll.new()
	root.add_child(_ocean)
	print("[ocean_test] ocean instantiated")


func _process(_delta: float) -> bool:
	_frames += 1
	# 第 1 帧本回调先于海面节点的首个 _process，跳过（贴图尚未定位）
	if _frames >= 2:
		var covered := Rect2()
		var first := true
		for tile in _ocean._tiles:
			var rect := Rect2(tile.position - TILE_HALF, TILE_HALF * 2.0)
			if first:
				covered = rect
				first = false
			else:
				covered = covered.merge(rect)
		if not covered.encloses(SCREEN):
			_fails += 1
			if _fails <= 3:
				print("[FAIL] frame %d coverage=%s tiles=%s" % [_frames, covered, _ocean._tiles.map(func(t): return t.position)])

	if _frames >= FRAMES:
		if _fails == 0:
			print("[ocean_test] PASS: %d 帧整屏全覆盖" % FRAMES)
		else:
			print("[ocean_test] FAIL: %d/%d 帧覆盖不足" % [_fails, FRAMES])
		quit(1 if _fails > 0 else 0)
		return true
	return false