extends SceneTree
## Beweisbild-Probe (Karte t_f72913d4 — Atmosphäre & Skybox): Editor-Vorschau
## MIT Pack-Panorama-Skybox vs. ProceduralSky — Sichtprüfung, dass die
## „Himmel: Pack-Skybox“-Option im Viewport tatsächlich die Wüsten-Panorama-
## Skybox zeigt (und ohne Feld das alte ProceduralSky bleibt).
##
##   xvfb-run -a /opt/data/home/bin/godot4 --path . --rendering-driver opengl3 \
##       -s res://tests/probe_skybox_render.gd
##
## Ausgabe: PROBE_SKYBOX_OK/_FAIL + PNGs im Beweis-Ordner.

const OUT_DIR := "/opt/data/scopedvr/work/atmos_skybox_bilder"

var fehler: Array = []


func _initialize() -> void:
	_run()


func _run() -> void:
	DirAccess.make_dir_recursive_absolute(OUT_DIR)
	await process_frame
	await process_frame
	var manifest: Dictionary = JSON.parse_string(
			FileAccess.get_file_as_string(SvmapIO.MANIFEST_PATH))

	var builder := Node3D.new()
	builder.set_script(load("res://core/viewport/map_view_builder.gd"))
	root.add_child(builder)
	var bscript: Script = builder.get_script()
	var sky_pfad: String = bscript.panorama_sky_pfad()
	print("Panorama-Pfad: %s (existiert: %s)" % [sky_pfad, str(FileAccess.file_exists(sky_pfad))])
	if sky_pfad.is_empty() or not FileAccess.file_exists(sky_pfad):
		fehler.append("Pack-Skybox im Nachbar-Klon nicht erreichbar")

	var doc: Dictionary = SvmapDocument.create_new("Skybox-Beweis", 64.0, "mittag")

	# Kamera AM ROOT (rebuild() freed alle Builder-Kinder — eine Kamera am
	# Builder würde bei jedem Rebuild mit sterben). WorldEnvironment wirkt
	# viewport-global, die Kamera sieht den Himmel trotzdem.
	var cam := Camera3D.new()
	root.add_child(cam)
	cam.position = Vector3(0.0, 6.0, 20.0)
	cam.look_at(Vector3(0.0, 8.0, -100.0))
	cam.current = true

	# --- 1) Mit Pack-Skybox ---
	doc["weather_sky"] = "sky_panorama"
	builder.call("rebuild", doc, manifest)
	await process_frame
	await process_frame
	var we := _welt_env(builder)
	if we == null or we.environment == null or we.environment.sky == null:
		fehler.append("kein WorldEnvironment/Sky im Baum")
	else:
		var mat = we.environment.sky.sky_material
		print("Panorama-Fall: Material = %s" % str(mat))
		if not (mat is PanoramaSkyMaterial):
			fehler.append("Panorama-Fall zeigt kein PanoramaSkyMaterial")
		if we.environment.tonemap_mode != Environment.TONE_MAPPER_ACES:
			fehler.append("Tonemap ist nicht ACES")
	await RenderingServer.frame_post_draw
	var img := root.get_texture().get_image()
	var pfad1 := OUT_DIR.path_join("editor_panorama_skybox.png")
	img.save_png(pfad1)
	print("PROBE_SAVED %s (%dx%d)" % [pfad1, img.get_width(), img.get_height()])
	if img.get_width() < 100:
		fehler.append("Panorama-Bild verdächtig klein")

	# --- 2) Ohne Feld (alte Map) → Procedural ---
	doc.erase("weather_sky")
	builder.call("rebuild", doc, manifest)
	await process_frame
	await process_frame
	var we2 := _welt_env(builder)
	if we2 != null and we2.environment != null and we2.environment.sky != null:
		var mat2 = we2.environment.sky.sky_material
		print("Prozedural-Fall: Material = %s" % str(mat2))
		if not (mat2 is ProceduralSkyMaterial):
			fehler.append("Ohne Feld zeigt nicht das ProceduralSky")
	await RenderingServer.frame_post_draw
	var img2 := root.get_texture().get_image()
	var pfad2 := OUT_DIR.path_join("editor_prozedural_sky.png")
	img2.save_png(pfad2)
	print("PROBE_SAVED %s (%dx%d)" % [pfad2, img2.get_width(), img2.get_height()])

	for f in fehler:
		print("  FEHLER: %s" % f)
	print("PROBE_SKYBOX_%s" % ("FAIL" if not fehler.is_empty() else "OK"))
	quit(0 if fehler.is_empty() else 1)


func _welt_env(builder: Node) -> WorldEnvironment:
	for child in builder.get_children():
		if child is WorldEnvironment:
			return child
	return null