# python_game_render_test — 2V2-e：Godot 里跑 40250 的 system.py，按 port_login_flow_test 的同一条路径
# 登录 → 选人 → 进游戏，把 RenderGame 的绘制命令（python_3d_surface.gd）画出来并截图。
#
#   godot --path project --script res://python_game_render_test.gd
#
# 服务器与账号只从环境变量读（MT_LIVE_HOST / MT_LIVE_LOGIN / MT_LIVE_PASSWORD，可选 MT_LIVE_AUTH_PORT
# 11000、MT_LIVE_GAME_PORT 13000、MT_LIVE_SLOT 0）；Python 侧也用 os.environ 取，不进源码文本。
# 离线由 script/python_game_render_test.sh 起 port_fake_login_server 并把这些变量指向它。
# 截图与 report.json 写到 MT_RENDER_OUTPUT（默认 build/rendering/python-game-<时间>）。
extends SceneTree

const PythonUISurface = preload("res://python_ui_surface.gd")
const Python3DSurface = preload("res://python_3d_surface.gd")

var failed := false
var ui: Control
var world: Node3D

func _initialize() -> void:
	call_deferred("run")

func _check(ok: bool, message: String) -> void:
	if ok:
		print("ok: " + message)
	else:
		failed = true
		printerr("FAIL: " + message)

func _py(source: String) -> bool:
	return Metin2PythonHost.run_line(source) == ""

func _pump_until(seconds: float, condition: Callable) -> bool:
	var deadline := Time.get_ticks_msec() + int(seconds * 1000.0)
	while Time.get_ticks_msec() < deadline:
		if condition.call():
			return true
		await process_frame
	return condition.call()

func _finish(output: String, report: Dictionary) -> void:
	report["passed"] = not failed
	var file := FileAccess.open(output.path_join("report.json"), FileAccess.WRITE)
	if file:
		file.store_string(JSON.stringify(report, "  "))
		file.close()
	print("python_game_render_test: %s (%s)" % ["FAIL" if failed else "PASS", output])
	ui.queue_free()
	await process_frame
	quit(1 if failed else 0)

func run() -> void:
	root.size = Vector2i(1024, 768)
	var output := OS.get_environment("MT_RENDER_OUTPUT")
	if output.is_empty():
		output = ProjectSettings.globalize_path("res://../build/rendering/python-game-%d" % Time.get_unix_time_from_system())
	DirAccess.make_dir_recursive_absolute(output)
	var report := {"output": output, "headless": DisplayServer.get_name() == "headless"}

	var host := OS.get_environment("MT_LIVE_HOST")
	if host.is_empty() or OS.get_environment("MT_LIVE_LOGIN").is_empty() or OS.get_environment("MT_LIVE_PASSWORD").is_empty():
		printerr("python_game_render_test: needs MT_LIVE_HOST, MT_LIVE_LOGIN, MT_LIVE_PASSWORD")
		quit(2)
		return

	world = Python3DSurface.new()
	world.name = "Python3DSurface"
	ui = PythonUISurface.new()
	ui.name = "PythonUISurface"
	# The UI surface runs CPythonApplication::Process in its _process; the 3D surface reads the draws
	# of that frame after it, so it comes second in the tree.
	root.add_child(ui)
	root.add_child(world)
	var err: String = ui.run_app()
	_check(err == "", "system.py reached app.Loop() (%s)" % err)
	if err != "":
		await _finish(output, report)
		return

	_check(_py("import __main__, os, networkModule, introLogin, introSelect, introLoading, game\n"
			+ "__main__._stream = [o for o in __import__('gc').get_objects() if isinstance(o, networkModule.MainStream)][0]"),
			"found networkModule.MainStream")
	var at_login := await _pump_until(20, func(): return _py(
			"assert isinstance(_stream.curPhaseWindow, introLogin.LoginWindow)"))
	_check(at_login, "login window")

	# LoginWindow.Connect with the account from the environment.
	_check(_py("_env = os.environ\n"
			+ "_slot = int(_env.get('MT_LIVE_SLOT', '0'))\n"
			+ "_stream.SetConnectInfo(_env['MT_LIVE_HOST'], int(_env.get('MT_LIVE_GAME_PORT', '13000')), "
			+ "_env['MT_LIVE_HOST'], int(_env.get('MT_LIVE_AUTH_PORT', '11000')))\n"
			+ "_stream.curPhaseWindow.Connect(_env['MT_LIVE_LOGIN'], _env['MT_LIVE_PASSWORD'])\n"
			+ "del _env"), "LoginWindow.Connect")
	var selecting := await _pump_until(30, func(): return _py(
			"assert isinstance(_stream.curPhaseWindow, introSelect.SelectCharacterWindow)"))
	_check(selecting, "character select")
	if selecting:
		_check(_py("_stream.curPhaseWindow.SelectSlot(_slot)\n_stream.curPhaseWindow.StartGame()"), "StartGame")
	var in_game := selecting and await _pump_until(60, func(): return _py(
			"assert isinstance(_stream.curPhaseWindow, game.GameWindow) and _stream.curPhaseWindow.IsShow()"))
	_check(in_game, "game window")

	# The main character's draws reach the 3D surface.
	var drawn := in_game and await _pump_until(10, func(): return world.draw_count > 0)
	_check(drawn, "RenderGame draws shown (%d)" % world.draw_count)
	# Let the WAIT motion run a little before the picture.
	for i in 30:
		await process_frame
	report["draw_count"] = world.draw_count
	report["unlit_stand_in_count"] = world.unlit_stand_in_count
	report["camera_fov"] = world.camera.fov
	report["camera_near"] = world.camera.near
	report["camera_far"] = world.camera.far
	var textures := []
	var draws: Array = Metin2PythonHost.render3d_draws()
	if not draws.is_empty():
		report["proj"] = Array(draws[0]["proj"])
		report["view"] = Array(draws[0]["view"])
		# Each draw's render state (everything but the arrays and matrices).
		var states := []
		for draw in draws:
			var state := {}
			for key in draw:
				if typeof(draw[key]) in [TYPE_BOOL, TYPE_INT, TYPE_FLOAT, TYPE_STRING, TYPE_COLOR, TYPE_VECTOR3]:
					state[key] = str(draw[key])
			state["vertices"] = draw["positions"].size()
			if draw.has("uv0"):
				var lo := Vector2(INF, INF)
				var hi := -lo
				for uv in draw["uv0"]:
					lo = lo.min(uv)
					hi = hi.max(uv)
				state["uv0_range"] = str([lo, hi])
			state["indices"] = draw["indices"].size()
			states.append(state)
		report["draw_states"] = states
	for draw in draws:
		if not draw["texture0"].is_empty() and not textures.has(draw["texture0"]):
			textures.append(draw["texture0"])
	report["textures"] = textures
	var surfaces_textured := 0
	for instance in world.find_children("Draw*", "MeshInstance3D", false, false):
		if instance.visible and instance.mesh:
			var material: StandardMaterial3D = instance.mesh.surface_get_material(0)
			if material and material.albedo_texture:
				surfaces_textured += 1
	report["surfaces_textured"] = surfaces_textured
	var bounds := []
	for instance in world.find_children("Draw*", "MeshInstance3D", false, false):
		if instance.visible and instance.mesh:
			bounds.append(str(instance.transform * instance.mesh.get_aabb()))
	report["camera_space_bounds"] = bounds
	_check(not drawn or surfaces_textured > 0, "character surfaces have their diffuse textures (%d)" % surfaces_textured)
	if DisplayServer.get_name() != "headless":
		await RenderingServer.frame_post_draw
		var image := root.get_texture().get_image()
		_check(image.save_png(output.path_join("game.png")) == OK, "screenshot saved")
		# The character is centred by __UpdateCamera: the middle of the picture is not background.
		var centre := Rect2i(image.get_width() * 2 / 5, image.get_height() * 3 / 10,
				image.get_width() / 5, image.get_height() * 2 / 5)
		var lit := 0
		for y in range(centre.position.y, centre.end.y, 4):
			for x in range(centre.position.x, centre.end.x, 4):
				if image.get_pixel(x, y).get_luminance() > 0.05:
					lit += 1
		report["centre_lit_samples"] = lit
		_check(lit > 50, "character pixels in the middle of the screen (%d samples)" % lit)
		# The 3D pass alone, for looking at the character without the UI.
		ui.visible = false
		await RenderingServer.frame_post_draw
		root.get_texture().get_image().save_png(output.path_join("game_3d.png"))
		ui.visible = true
	await _finish(output, report)