extends SceneTree
## Echter Maus-Drag im sichtbaren Fenster (nicht headless): Kachel drücken, über die
## Szene ziehen, loslassen → genau ein Objekt gesetzt. Ausführen:
##   godot4 --rendering-driver opengl3 --path . --script res://tests/probe_drag_echt.gd

func _mouse(pos: Vector2, pressed: bool, motion := false) -> void:
	var ev: InputEvent
	if motion:
		var mm := InputEventMouseMotion.new()
		mm.position = pos
		mm.global_position = pos
		mm.relative = Vector2(4, 4)
		mm.button_mask = MOUSE_BUTTON_MASK_LEFT
		ev = mm
	else:
		var mb := InputEventMouseButton.new()
		mb.button_index = MOUSE_BUTTON_LEFT
		mb.position = pos
		mb.global_position = pos
		mb.pressed = pressed
		mb.button_mask = MOUSE_BUTTON_MASK_LEFT if pressed else 0
		ev = mb
	root.push_input(ev)


func _init() -> void:
	root.size = Vector2i(1600, 900)
	var main: Control = (load("res://scenes/main.tscn") as PackedScene).instantiate()
	root.add_child(main)
	for i in 10:
		await process_frame
	main.sym_mode = SymmetryCore.Mode.OFF
	var vc0: Control = main.interaction.camera.get_viewport().get_parent()
	var n0: int = (main.doc["objects"] as Array).size()
	var oid := "barrel_001"
	main.assets_mod._on_library_expand_all()
	for i in 5:
		await process_frame
	var btn: Button = main.library_buttons.get(oid)
	print("window=", root.size, " btn=", btn)
	btn.get_parent().get_parent()
	# Kachel in Sicht scrollen
	var p := btn.get_parent()
	while p != null and not (p is ScrollContainer):
		p = p.get_parent()
	if p != null:
		(p as ScrollContainer).ensure_control_visible(btn)
	for i in 5:
		await process_frame
	var r := btn.get_global_rect()
	print("Kachel rect=", r)
	var start := r.get_center()
	var vc: Control = main.interaction.camera.get_viewport().get_parent()
	var vr := vc.get_global_rect()
	print("Szene rect=", vr)
	var ziel := vr.get_center()
	_mouse(start, false, true)
	await process_frame
	_mouse(start, true)
	await process_frame
	var steps := 25
	for i in steps + 1:
		var pos := start.lerp(ziel, float(i) / steps)
		_mouse(pos, false, true)
		await process_frame
	for j in 6:
		_mouse(ziel + Vector2(j * 3, j * 2), false, true)
		await process_frame
	var hov := root.gui_get_hovered_control()
	print("Hover-Control: ", hov, " pfad=", hov.get_path() if hov != null else "-")
	print("DragData=", root.gui_get_drag_data())
	print("während Drag: dragging=", root.gui_is_dragging(), " placing=", main.interaction.placing)
	_mouse(ziel, false)
	for i in 4:
		await process_frame
	var n1: int = (main.doc["objects"] as Array).size()
	print("Objekte: %d → %d  placing=%s" % [n0, n1, main.interaction.placing])
	print("ERGEBNIS: ", "OK" if n1 == n0 + 1 else "FEHLER")
	quit(0 if n1 == n0 + 1 else 1)