// See PythonBoot.h. The sequence is 40250 UserInterface.cpp:241-352 (RunMainScript) and 419-434 (Main),
// split so the launcher can outlive the call that creates it.
#include "ScriptLib/StdAfx.h"
#include "ScriptLib/PythonLauncher.h"
#include "ScriptLib/Resource.h"
#include "UserInterface/StdAfx.h" // initpack and the rest of the module initializer list
#include "EterPythonLib/StdAfx.h"
#include "EterPythonLib/PythonWindow.h"
#include "EterBase/Timer.h"
#include "EterLib/Util.h"
#include "EterLib/GrpBase.h"
#include "EterLib/GrpImage.h"
#include "EterLib/Camera.h"
#include "../EterLib/HostCursor.h"
#include "UserInterface/PythonNetworkStream.h"
#include "UserInterface/AccountConnector.h"
#include "UserInterface/PythonExceptionSender.h"
#include "UserInterface/ServerStateChecker.h"
#include "UserInterface/PythonPlayer.h"
#include "GameLib/FlyingObjectManager.h"
#include "MilesLib/SoundManager.h"
#include "GameLib/RaceManager.h"
#include "GameLib/GameEventManager.h"
#include "EffectLib/EffectManager.h"
#include "GameLib/ItemManager.h"
#include "UserInterface/PythonCharacterManager.h"
#include "UserInterface/PythonItem.h"
#include "UserInterface/PythonShop.h"
#include "UserInterface/PythonExchange.h"
#include "UserInterface/PythonChat.h"
#include "UserInterface/PythonTextTail.h"
#include "UserInterface/PythonNonPlayer.h"
#include "UserInterface/PythonMiniMap.h"
#include "UserInterface/PythonEventManager.h"
#include "UserInterface/PythonBackground.h"
#include "UserInterface/PythonSkill.h"
#include "UserInterface/PythonQuest.h"
#include "UserInterface/PythonMessenger.h"
#include "UserInterface/PythonSafeBox.h"
#include "UserInterface/PythonGuild.h"
#include "UserInterface/MarkManager.h"
#include "UserInterface/GuildMarkDownloader.h"
#include "UserInterface/GuildMarkUploader.h"
#include "UserInterface/PythonSystem.h"
#include "UserInterface/AbstractApplication.h"
#include "UserInterface/PythonApplication.h"
#include "EterBase/Timer.h"
#include "PythonBoot.h"
#include "PythonHost.h"
#include "../EterLib/UIRenderCommands.h"
#include "../EterBase/LogBox.h"
#include "../UserInterface/ServerClock.h"

#include <atomic>
#include <condition_variable>
#include <cstdlib>
#include <filesystem>
#include <memory>
#include <mutex>
#include <pthread.h>
#if defined(__APPLE__)
#include <execinfo.h>
#include <signal.h>
#include <unistd.h>
#endif
#if defined(__linux__) || defined(__ANDROID__)
#include <unistd.h>
#endif

namespace
{
// 40250 has this on Main()'s stack. CPythonLauncher is a CSingleton, so there is still only ever one.
std::unique_ptr<CPythonLauncher> g_launcher;
// 40250 Main(): CPythonExceptionSender pyExceptionSender; SetExceptionSender(&pyExceptionSender);
std::unique_ptr<CPythonExceptionSender> g_exception_sender;
std::unique_ptr<UI::CWindowManager> g_window_manager;
std::unique_ptr<CPythonResource> g_resource;
// 40250 CPythonApplication::m_timer; CSlotWindow's cool time and Process() read it via Instance().
std::unique_ptr<CTimer> g_timer;
// 40250 CPythonApplication::m_pyNetworkStream and m_kAccountConnector (CSingletons); the app loop
// processes them every frame and the net module reaches them through Instance().
std::unique_ptr<CPythonNetworkStream> g_network_stream;
std::unique_ptr<CAccountConnector> g_account_connector;
// 40250 CPythonApplication::m_pyPlayer, m_FlyingManager and m_kEftMgr: the loading phase clears them
// (CPythonNetworkStream::SetLoadingPhase).
std::unique_ptr<CPythonPlayer> g_player;
std::unique_ptr<CSoundManager> g_sound_manager;
std::unique_ptr<CFlyingManager> g_flying_manager;
// 40250 CPythonApplication::m_kServerStateChecker: intrologin.py's channel status list.
std::unique_ptr<CServerStateChecker> g_server_state_checker;
std::unique_ptr<CRaceManager> g_race_manager;
std::unique_ptr<CGameEventManager> g_game_event_manager;
std::unique_ptr<CEffectManager> g_effect_manager;
// PORT: CPythonApplication is not constructed by the Godot host yet. GamePhase calls the
// 40250 IAbstractApplication singleton, so expose the host's current timer and camera surface.
class GameApplicationAdapter final : public IAbstractApplication
{
public:
	void GetMousePosition(POINT* point) override
	{
		if (point)
			CPythonApplication::Instance().GetMousePosition(point);
	}
	float GetGlobalTime() override { return CTimer::Instance().GetCurrentSecond(); }
	float GetGlobalElapsedTime() override { return CTimer::Instance().GetElapsedSecond(); }
	void SkipRenderBuffering(DWORD) override {}
	void SetServerTime(time_t server_time) override { SetPlatformServerTime(server_time); }
	void SetCenterPosition(float x, float y, float z) override
	{
		CPythonApplication::Instance().SetCenterPosition(x, y, z);
	}
	void SetEventCamera(const SCameraSetting& setting) override
	{
		CPythonApplication::Instance().SetEventCamera(setting);
	}
	void BlendEventCamera(const SCameraSetting&, float) override {}
	void SetDefaultCamera() override { CPythonApplication::Instance().SetDefaultCamera(); }
	// 40250 CPythonApplication::RunIME* (PythonApplicationEvent.cpp:148-195): CPythonIME's event sink.
	void RunIMEUpdate() override { UI::CWindowManager::Instance().RunIMEUpdate(); }
	void RunIMETabEvent() override { UI::CWindowManager::Instance().RunIMETabEvent(); }
	void RunIMEReturnEvent() override { UI::CWindowManager::Instance().RunIMEReturnEvent(); }
	void RunIMEChangeCodePage() override { UI::CWindowManager::Instance().RunChangeCodePage(); }
	void RunIMEOpenCandidateListEvent() override { UI::CWindowManager::Instance().RunOpenCandidate(); }
	void RunIMECloseCandidateListEvent() override { UI::CWindowManager::Instance().RunCloseCandidate(); }
	void RunIMEOpenReadingWndEvent() override { UI::CWindowManager::Instance().RunOpenReading(); }
	void RunIMECloseReadingWndEvent() override { UI::CWindowManager::Instance().RunCloseReading(); }
};
std::unique_ptr<GameApplicationAdapter> g_game_application;
// The CPythonApplication members the game phase reaches through Instance() (批次 2V2), in 40250's member
// order. All are platform/pending stand-ins so far: their stub constructors leave scalar members unset, so
// the object is built in zeroed storage and inline header accessors read null/0 rather than garbage.
struct GameSingletons
{
	static void* operator new(size_t size) { return std::calloc(1, size); }
	static void operator delete(void* p) { std::free(p); }

	CItemManager kItemMgr;
	CPythonCharacterManager kChrMgr;
	CPythonGraphic pyGraphic; // owns CCullingManager (m_CullingManager)
	CPythonIME pyIme;
	CPythonItem pyItem;
	CPythonShop pyShop;
	CPythonExchange pyExchange;
	CPythonChat pyChat;
	CPythonTextTail pyTextTail;
	CPythonNonPlayer pyNonPlayer;
	CPythonMiniMap pyMiniMap;
	CPythonEventManager pyEventManager;
	CPythonBackground pyBackground;
	CPythonSkill pySkill;
	CPythonQuest pyQuest;
	CPythonMessenger pyManager;
	CPythonSafeBox pySafeBox;
	CPythonGuild pyGuild;
	CGuildMarkManager kGuildMarkManager;
	CGuildMarkDownloader kGuildMarkDownloader;
	CGuildMarkUploader kGuildMarkUploader;
	CPythonSystem pySystem; // last CPythonApplication member (m_pySystem)
};
std::unique_ptr<GameSingletons> g_game_singletons;
bool g_host_hardware_cursor_enabled = false;
bool g_touch_input = false;

bool fail(std::string* error, const std::string& text)
{
	if (error)
		*error = text;
	return false;
}

// PORT: 40250 RunApp() blocks inside app.Loop() (CPythonApplication::Loop, PythonApplication.cpp:980)
// and only returns to run mainStream.Destroy() when the window closes. Godot owns the frame loop here,
// so system.py runs on its own thread and the two threads pass a baton: exactly one of them runs at
// any time. Loop() hands the baton back after every Process(), and the host hands it over once per
// Godot frame (AppFrame). The script keeps its original control flow — including the code after
// app.Loop() — without ever blocking the Godot main thread for more than one Process().
struct ScriptFiber
{
	enum Turn { Host, Script };

	std::mutex mutex;
	std::condition_variable cv;
	Turn turn = Host;
	pthread_t thread{};
	bool alive = false;       // the thread exists and has not been joined
	bool finished = false;    // RunMainScript's body returned
	bool looping = false;     // parked inside CPythonApplication::Loop
	bool quit = false;        // app.Exit / app.Abort / Stop
	bool ok = false;
	std::string error;
	std::string command_line;
};
ScriptFiber g_fiber;
thread_local bool t_on_fiber = false;
std::atomic<int> g_script_thread_id{0};

// Caller holds the GIL. Returns with the GIL held again after the script has given the baton back.
void hand_to_script()
{
	PyThreadState* state = PyEval_SaveThread();
	{
		std::unique_lock<std::mutex> lock(g_fiber.mutex);
		g_fiber.turn = ScriptFiber::Script;
		g_fiber.cv.notify_all();
		g_fiber.cv.wait(lock, [] { return g_fiber.turn == ScriptFiber::Host; });
	}
	PyEval_RestoreThread(state);
}

void join_fiber()
{
	if (!g_fiber.alive)
		return;
	PyThreadState* state = PyEval_SaveThread();
	pthread_join(g_fiber.thread, nullptr);
	PyEval_RestoreThread(state);
	g_fiber.alive = false;
}

bool run_main_script_body(const char* lpCmdLine, std::string* error);

void* fiber_main(void*)
{
	{
		std::unique_lock<std::mutex> lock(g_fiber.mutex);
		g_fiber.cv.wait(lock, [] { return g_fiber.turn == ScriptFiber::Script; });
	}
	t_on_fiber = true;
#if defined(__linux__) || defined(__ANDROID__)
	g_script_thread_id = int(gettid());
#endif
	PyGILState_STATE gil = PyGILState_Ensure();
	std::string error;
	const bool ok = run_main_script_body(g_fiber.command_line.c_str(), &error);
	PyGILState_Release(gil);

	std::lock_guard<std::mutex> lock(g_fiber.mutex);
	g_fiber.ok = ok;
	g_fiber.error = error;
	g_fiber.finished = true;
	g_fiber.looping = false;
	g_fiber.turn = ScriptFiber::Host;
	g_fiber.cv.notify_all();
	return nullptr;
}
}

void init_2v0_gameplay_stubs();

namespace PythonBoot
{
void SetHostHardwareCursorEnabled(bool enabled)
{
	g_host_hardware_cursor_enabled = enabled;
}

bool HostHardwareCursorEnabled()
{
	return g_host_hardware_cursor_enabled;
}

int CursorShape()
{
	return g_game_singletons ? CPythonApplication::Instance().GetCursorNum() : 0;
}

bool CursorVisible()
{
	return !g_game_singletons || CPythonApplication::Instance().GetCursorVisible();
}

std::string CurrentMapName()
{
	if (!g_game_singletons)
		return {};
	return CPythonBackground::Instance().GetWarpMapName();
}

bool IsRunning()
{
	return g_launcher != nullptr;
}

static int g_ui_safe_inset = 0;

void SetUISafeInset(int inset)
{
	g_ui_safe_inset = std::max(0, inset);
}

void SetUISize(int width, int height)
{
	if (!g_window_manager || width <= 0 || height <= 0) return;
	const int inset = std::min(g_ui_safe_inset, width / 8);
	g_window_manager->SetScreenSize(width - 2 * inset, height);
	g_window_manager->SetResolution(width, height);
	g_window_manager->SetScreenOffsetX(inset);
	UIRenderSetSize(width, height);
	CGraphicBase::SetBackBufferSize(width, height);
	if (g_game_singletons)
	{
		g_game_singletons->pySystem.GetConfig()->width = width;
		g_game_singletons->pySystem.GetConfig()->height = height;
	}
}

void update_3d_pick_ray()
{
	if (!g_game_singletons || !g_window_manager)
		return;
	if (!CPythonBackground::Instance().IsMapReady())
		return;
	long lx = 0, ly = 0;
	g_window_manager->GetMousePosition(lx, ly);
	// The pick ray goes through the full-screen 3D view: screen coordinates and resolution.
	lx += g_window_manager->GetScreenOffsetX();
	long sw = 0, sh = 0;
	g_window_manager->GetResolution(sw, sh);
	if (sw <= 0 || sh <= 0)
		return;
	CScreen s;
	s.SetPerspective(30.0f, g_window_manager->GetAspect(), 100.0f, CPythonBackground::Instance().GetFarClip());
	s.UpdateViewMatrix();
	s.BuildViewFrustum();
	s.SetCursorPosition(lx, ly, sw, sh);
	POINT ptMouse{static_cast<LONG>(lx), static_cast<LONG>(ly)};
	CPythonItem::Instance().Update(ptMouse);
	CPythonCharacterManager::Instance().Pick();
}

void UIMouseMove(int x, int y)
{
	MtHostSetCursor(x, y);
	if (g_game_singletons)
	{
		CPythonApplication::Instance().OnMouseMove(x, y);
		if (g_window_manager)
		{
			long lx = x, ly = y;
			g_window_manager->GetMousePosition(lx, ly);
			MtHostSetCursor(static_cast<int>(lx), static_cast<int>(ly));
		}
		update_3d_pick_ray();
		return;
	}
	if (g_window_manager) g_window_manager->RunMouseMove(x, y);
}

void UIMouseButton(int button, bool pressed, int x, int y)
{
	MtHostSetCursor(x, y);
	if (!g_window_manager) return;
	if (g_game_singletons)
		CPythonApplication::Instance().OnMouseMove(x, y);
	else
		g_window_manager->RunMouseMove(x, y);
	{
		long lx = x, ly = y;
		g_window_manager->GetMousePosition(lx, ly);
		MtHostSetCursor(static_cast<int>(lx), static_cast<int>(ly));
	}
	update_3d_pick_ray();
	switch (button)
	{
	case 1:
		if (pressed)
			g_window_manager->RunMouseLeftButtonDown(x, y);
		else
			g_window_manager->RunMouseLeftButtonUp(x, y);
		break;
	case 2:
		if (pressed)
		{
			g_window_manager->RunMouseRightButtonDown(x, y);
		}
		else
		{
			g_window_manager->RunMouseRightButtonUp(x, y);
			if (g_game_singletons)
			{
				CCamera* pkCmrCur = CCameraManager::Instance().GetCurrentCamera();
				if (pkCmrCur && pkCmrCur->IsDraging())
					CPythonApplication::Instance().OnMouseMiddleButtonUp(x, y);
			}
		}
		break;
	case 3:
		if (g_game_singletons)
		{
			if (pressed) CPythonApplication::Instance().OnMouseMiddleButtonDown(x, y);
			else CPythonApplication::Instance().OnMouseMiddleButtonUp(x, y);
		}
		if (pressed) g_window_manager->RunMouseMiddleButtonDown(x, y); else g_window_manager->RunMouseMiddleButtonUp(x, y);
		break;
	default: break;
	}
}

void UIMouseWheel(int nLen)
{
	CCameraManager& rkCmrMgr = CCameraManager::Instance();
	CCamera* pkCmrCur = rkCmrMgr.GetCurrentCamera();
	if (pkCmrCur)
		pkCmrCur->Wheel(nLen);
}

// 40250 CPythonApplication::WindowProcedure WM_ACTIVATEAPP (PythonApplicationProcedure.cpp:58): the sound
// is muted while the window is inactive.
void UIActivate(bool active)
{
	if (!g_sound_manager) return;
	if (active)
		g_sound_manager->RestoreVolume();
	else
		g_sound_manager->SaveVolume();
}

// 40250 CPythonApplication::OnKeyDown/OnKeyUp (PythonApplicationEvent.cpp:130-146): ESC first goes
// to RunPressEscapeKey (the OnPressEscapeKey chain every dialog closes on), then to RunKeyDown.
void UIKey(int key, bool pressed)
{
	if (!g_window_manager) return;
	if (pressed)
	{
		CPythonApplication::Instance().KeyDown(key);
		if (DIK_ESCAPE == key)
			g_window_manager->RunPressEscapeKey();
		g_window_manager->RunKeyDown(key);
	}
	else
	{
		CPythonApplication::Instance().KeyUp(key);
		g_window_manager->RunKeyUp(key);
	}
}

void SetMoveDirection(float angleDeg, bool moving)
{
	if (!g_game_singletons) return;
	if (moving)
		// The touch stick only steers the player; the camera turns by the right-hand drag.
		CPythonPlayer::Instance().NEW_MoveToDirection(angleDeg, false);
	else
		CPythonPlayer::Instance().NEW_Stop();
}

void SetAttackKey(bool pressed)
{
	if (!g_game_singletons) return;
	CPythonPlayer::Instance().SetAttackKeyState(pressed);
}

void UseLocalQuickSlot(int localSlotIndex)
{
	if (!g_game_singletons || localSlotIndex < 0 || localSlotIndex >= 8) return;
	CPythonPlayer::Instance().RequestUseLocalQuickSlot(static_cast<DWORD>(localSlotIndex));
}

void AutoHuntToggle()
{
	std::string error;
	if (g_game_singletons)
		RunLine("__import__('mt_autohunt').Toggle()", &error);
}

void AutoHuntOpenSettings()
{
	std::string error;
	if (g_game_singletons)
		RunLine("__import__('mt_autohunt').OpenSettings()", &error);
}

bool AutoHuntIsEnabled()
{
	return g_game_singletons && CPythonPlayer::Instance().AutoHunt_IsEnabled();
}

bool AutoHuntAvailable()
{
	return g_game_singletons && CPythonPlayer::Instance().NEW_GetMainActorPtr() != nullptr;
}

bool TryAssignAttachedObjectToLocalQuickSlot(int localSlotIndex)
{
	if (!g_game_singletons || localSlotIndex < 0 || localSlotIndex >= 8) return false;
	std::string attached;
	std::string error;
	if (!Evaluate("__import__('mouseModule').mouseController.isAttached()", &attached, &error) ||
		(attached != "True" && attached != "1"))
		return false;

	const std::string command =
		"_stream.curPhaseWindow.interface.wndTaskBar.AddQuickSlot(" + std::to_string(localSlotIndex) + ")";
	return RunLine(command.c_str(), &error);
}

namespace
{
// The icons are .sub images (a rect of a shared texture). A resource only loads while referenced, and
// on touch hosts the taskbar slots that would reference it are hidden, so the overlay holds one.
bool quick_slot_image_uv(CGraphicImage* image, std::string* texture, float uv[4])
{
	if (!image) return false;
	static std::vector<CGraphicImage::TRef> s_heldIcons;
	if (std::none_of(s_heldIcons.begin(), s_heldIcons.end(),
			[image](const CGraphicImage::TRef& ref) { return ref.GetPointer() == image; }))
		s_heldIcons.emplace_back(image);

	CGraphicTexture* tex = image->GetTexturePointer();
	if (image->IsEmpty() || !tex || tex->GetWidth() <= 0 || tex->GetHeight() <= 0) return false;
	*texture = UIRenderTextureName(tex);
	if (texture->empty()) return false;
	// CGraphicImageInstance::OnRender's texture coordinates.
	const RECT& rc = image->GetRectReference();
	uv[0] = float(rc.left) / float(tex->GetWidth());
	uv[1] = float(rc.top) / float(tex->GetHeight());
	uv[2] = float(rc.right) / float(tex->GetWidth());
	uv[3] = float(rc.bottom) / float(tex->GetHeight());
	return true;
}
}

bool LocalQuickSlotIcon(int localSlotIndex, std::string* texture, float uv[4], int* count)
{
	if (!g_game_singletons || localSlotIndex < 0 || localSlotIndex >= 8) return false;
	DWORD type = SLOT_TYPE_NONE;
	DWORD position = 0;
	CPythonPlayer& player = CPythonPlayer::Instance();
	player.GetLocalQuickSlotData(static_cast<DWORD>(localSlotIndex), &type, &position);
	*count = 0;

	if (type == SLOT_TYPE_SKILL) {
		CPythonSkill::TSkillData* skillData = nullptr;
		if (!CPythonSkill::Instance().GetSkillData(player.GetSkillIndex(position), &skillData) || !skillData)
			return false;
		const int grade = std::clamp(player.GetSkillGrade(position), 0, CPythonSkill::SKILL_GRADE_COUNT - 1);
		CGraphicImage* image = skillData->GradeData[grade].pImage;
		if (!image) image = skillData->pImage;
		return quick_slot_image_uv(image, texture, uv);
	}
	if (type == SLOT_TYPE_INVENTORY) {
		// uitaskbar.RefreshQuickSlot: the item's icon and, above one, its count.
		const TItemPos cell(INVENTORY, static_cast<WORD>(position));
		CItemData* itemData = nullptr;
		if (!CItemManager::Instance().GetItemDataPointer(player.GetItemIndex(cell), &itemData) || !itemData)
			return false;
		const DWORD itemCount = player.GetItemCount(cell);
		*count = itemCount > 1 ? static_cast<int>(itemCount) : 0;
		return quick_slot_image_uv(itemData->GetIconImage(), texture, uv);
	}
	return false;
}

void UIMouseDoubleClick(int x, int y)
{
	MtHostSetCursor(x, y);
	if (!g_window_manager) return;
	if (g_game_singletons)
		CPythonApplication::Instance().OnMouseMove(x, y);
	else
		g_window_manager->RunMouseMove(x, y);
	update_3d_pick_ray();
	g_window_manager->RunMouseLeftButtonDoubleClick(x, y);
}

bool UIIsAttaching()
{
	return g_window_manager && g_window_manager->IsAttaching();
}

void UIDeattachObject()
{
	std::string error;
	RunLine("__import__('mouseModule').mouseController.DeattachObject()", &error);
}

void CameraRotateBy(float rollDeg, float pitchDeg)
{
	CCamera* pkCmrCur = CCameraManager::Instance().GetCurrentCamera();
	if (!pkCmrCur || pkCmrCur->IsLock())
		return;

	// Same collision limits CCamera::Drag applies to its velocities.
	switch (pkCmrCur->GetCameraState())
	{
	case CAMERA_STATE_CANTGOLEFT:  rollDeg = std::max(0.0f, rollDeg); break;
	case CAMERA_STATE_CANTGORIGHT: rollDeg = std::min(0.0f, rollDeg); break;
	case CAMERA_STATE_CANTGODOWN:  pitchDeg = std::max(0.0f, pitchDeg); break;
	default: break;
	}
	pkCmrCur->RotateEyeAroundTarget(pitchDeg, rollDeg);
}

void SetTouchInput(bool touch)
{
	g_touch_input = touch;
	UI::CWindow::SetHideVirtualKeyboard(touch);
}

bool TouchInput()
{
	return g_touch_input;
}

bool TextInputFocused()
{
	return g_window_manager && CIME::ms_bCaptureInput;
}

bool IsPointInsideFocusedWindow(int x, int y)
{
	if (!g_window_manager) return false;
	UI::CWindow* pWin = g_window_manager->GetActivateWindow();
	return pWin && pWin->IsShow() && pWin->IsIn(x - g_window_manager->GetScreenOffsetX(), y);
}

bool IsPointInsideActiveUI(int x, int y)
{
	if (!g_window_manager) return false;
	return g_window_manager->IsPointInsideActiveUI(x - g_window_manager->GetScreenOffsetX(), y);
}

PlayerStatusInfo GetPlayerStatusInfo()
{
	PlayerStatusInfo info{};
	if (!g_game_singletons) return info;
	info.level = CPythonPlayer::Instance().GetStatus(POINT_LEVEL);
	info.hp = CPythonPlayer::Instance().GetStatus(POINT_HP);
	info.max_hp = CPythonPlayer::Instance().GetStatus(POINT_MAX_HP);
	info.sp = CPythonPlayer::Instance().GetStatus(POINT_SP);
	info.max_sp = CPythonPlayer::Instance().GetStatus(POINT_MAX_SP);
	info.exp = CPythonPlayer::Instance().GetStatus(POINT_EXP);
	info.max_exp = CPythonPlayer::Instance().GetStatus(POINT_NEXT_EXP);
	const char* szName = CPythonPlayer::Instance().GetName();
	if (szName) info.name = szName;
	return info;
}

// 40250 CPythonApplication::WindowProcedure (PythonApplicationProcedure.cpp:111-117): WM_CHAR goes to
// CPythonIME::WMChar and WM_KEYDOWN to OnIMEKeyDown (the VK code, next to DirectInput's DIK stream). The host
// delivers characters as Unicode code points; the 40250 window is an ANSI window, so a character that the input
// code page holds as one byte arrives as that byte, like WM_CHAR. PORT: anything else is what a Windows IME
// commits through WM_IME_COMPOSITION/GCS_RESULTSTR, which CIME::ResultProcess inserts as a wide string.
void UIChar(unsigned codepoint)
{
	if (!g_game_singletons || !codepoint) return;
	CPythonIME& ime = CPythonIME::Instance();
	if (codepoint < 0x80)
	{
		ime.WMChar(NULL, WM_CHAR, codepoint, 0);
		return;
	}
	const wchar_t wide = wchar_t(codepoint);
	char bytes[8];
	BOOL used_default = FALSE;
	const int n = WideCharToMultiByte(CIME::ms_uInputCodePage, 0, &wide, 1, bytes, sizeof(bytes), "?", &used_default);
	if (n == 1 && !used_default)
	{
		ime.WMChar(NULL, WM_CHAR, (unsigned char)bytes[0], 0);
		return;
	}
	// 40250 CIME::WMComposition with GCS_RESULTSTR: ResultProcess inserts the committed string, then OnUpdate.
	if (!CIME::ms_bCaptureInput)
		return;
	struct ResultAccess : CPythonIME
	{
		static void Insert(CPythonIME& ime, wchar_t* text, int len) { (ime.*(&ResultAccess::InsertString))(text, len); }
	};
	wchar_t text[1] = { wide };
	ResultAccess::Insert(ime, text, 1);
	if (CIME::ms_pEvent)
		CIME::ms_pEvent->OnUpdate();
}

void UIIMEKeyDown(int vkey)
{
	if (g_window_manager) g_window_manager->RunIMEKeyDown(vkey);
}

void UIUpdate()
{
	// While system.py is inside app.Loop(), one host frame is one CPythonApplication::Process(),
	// which updates and renders the window tree itself.
	if (IsAppLooping()) { AppFrame(); return; }
	if (g_window_manager) g_window_manager->Update();
}

void UIRender()
{
	if (IsAppLooping()) return;
	UIRenderBeginFrame();
	if (g_window_manager) g_window_manager->Render();
}

bool IsSoftwareCursorVisible()
{
	if (!g_game_singletons)
		return false;
	return CPythonApplication::Instance().GetCursorMode() == CPythonApplication::CURSOR_MODE_SOFTWARE &&
	       CPythonApplication::Instance().GetCursorVisible();
}

bool Start(const char* stdlib_path, std::string* error)
{
	if (g_launcher)
		return true;
	#if defined(__APPLE__)
	if (std::getenv("MT_BETA_DIAGNOSTIC"))
		signal(SIGSEGV, [](int) {
			void* frames[64];
			int count = backtrace(frames, 64);
			backtrace_symbols_fd(frames, count, STDERR_FILENO);
			std::_Exit(139);
		});
	#endif

	// 40250 Main (UserInterface.cpp:410): if (LocaleService_LoadGlobal(hInstance)) SetDefaultCodePage(...).
	std::string locale_config = "locale.cfg";
	if (const char* client = std::getenv("MT_40250_CLIENT"))
		locale_config = (std::filesystem::path(client) / "locale.cfg").string();
	LocaleService_LoadConfig(locale_config.c_str());
	SetDefaultCodePage(LocaleService_GetCodePage());
	if (const char* data_dir = std::getenv("MT_40250_USER_DATA_DIR"))
	{
		std::error_code ec;
		std::filesystem::current_path(data_dir, ec);
		if (ec)
			return fail(error, "cannot use player settings directory: " + ec.message());
	}

	const std::string stdlib = (stdlib_path && *stdlib_path) ? stdlib_path : PythonHost::DefaultStdLibPath();
	if (stdlib.empty())
		return fail(error, "no Python standard library path (Metin2Python.stdlib_path / $MT_PYTHON_STDLIB)");

	// The flags have to be set before the interpreter starts, i.e. before the constructor below.
	PythonHost::Configure();

	g_launcher = std::make_unique<CPythonLauncher>(); // Py_Initialize
	g_exception_sender = std::make_unique<CPythonExceptionSender>();
	SetExceptionSender(g_exception_sender.get());
	// The script fiber (RunMainScript) is a second OS thread; 2.7 creates the GIL lazily.
	PyEval_InitThreads();
	if (!g_launcher->Create())
	{
		Stop();
		return fail(error, "CPythonLauncher::Create failed");
	}

	std::string stdlib_error;
	if (!PythonHost::InstallStdLib(stdlib.c_str(), &stdlib_error))
	{
		Stop();
		return fail(error, "InstallStdLib(" + stdlib + "): " + stdlib_error);
	}
	g_timer = std::make_unique<CTimer>();
	g_resource = std::make_unique<CPythonResource>();
	g_window_manager = std::make_unique<UI::CWindowManager>();
	g_network_stream = std::make_unique<CPythonNetworkStream>();
	g_account_connector = std::make_unique<CAccountConnector>();
	g_player = std::make_unique<CPythonPlayer>();
	g_sound_manager = std::make_unique<CSoundManager>();
	g_flying_manager = std::make_unique<CFlyingManager>();
	g_server_state_checker = std::make_unique<CServerStateChecker>();
	g_race_manager = std::make_unique<CRaceManager>();
	g_game_event_manager = std::make_unique<CGameEventManager>();
	g_effect_manager = std::make_unique<CEffectManager>();
	g_game_application = std::make_unique<GameApplicationAdapter>();
	g_game_singletons = std::make_unique<GameSingletons>();
	unsigned ui_w = 0, ui_h = 0;
	UIRenderGetSize(&ui_w, &ui_h);
	if (ui_w && ui_h)
	{
		g_game_singletons->pySystem.GetConfig()->width = ui_w;
		g_game_singletons->pySystem.GetConfig()->height = ui_h;
	}
	// 40250 CPythonApplication::Create (PythonApplication.cpp:1186): no warning box when it fails.
	if (!g_game_singletons->pySystem.IsNoSoundCard())
		g_sound_manager->Create();
	g_game_singletons->pySystem.GetDisplaySettings(); // 40250 CPythonApplication::Create (PythonApplication.cpp:1233)
	g_flying_manager->SetMapManagerPtr(&g_game_singletons->pyBackground); // 40250 CPythonApplication ctor (PythonApplication.cpp:82)
	return true;
}

}

namespace
{
// Mirrors 40250 RunMainScript. Runs on the script fiber.
bool run_main_script_body(const char* lpCmdLine, std::string* error)
{
	CPythonLauncher& pyLauncher = *g_launcher;

	// The module initializers follow 40250's order; missing modules arrive in later 2V steps.
	initpack();
	initdbg();
	initime();
	initgrp();
	initgrpImage();
	initgrpText();
	initwndMgr();
	initapp();
	initsystem();
	initchr();
	initchrmgr();
	initPlayer();
	initItem();
	initNonPlayer();
	initTrade();
	initChat();
	initTextTail();
	initnet();
	initMiniMap();
	initEvent();
	initeffect();
	initfly();
	initsnd();
	initeventmgr();
	initshop();
	initskill();
	initquest();
	initBackground();
	initMessenger();
	initsafebox();
	initguild();
	initServerStateChecker();
	init_2v0_gameplay_stubs();

	ClearLogBoxMessage();

	NANOBEGIN

	// RegisterDebugFlag
	{
		std::string stRegisterDebugFlag;

#ifdef _DISTRIBUTE
		stRegisterDebugFlag ="__DEBUG__ = 0";
#else
		stRegisterDebugFlag ="__DEBUG__ = 1";
#endif

		if (!pyLauncher.RunLine(stRegisterDebugFlag.c_str()))
		{
			TraceError("RegisterDebugFlag Error");
			return fail(error, "RegisterDebugFlag Error: " + LastLogBoxMessage());
		}
	}

	// RegisterCommandLine.
	// PORT: the "-cs"/"-ncs" auto-login argument is passed through unchanged. Decoding it needs
	// EterBase/Utils.cpp SplitLine and EterLib/Util.cpp base64_decode, which are declared but not ported
	// yet; they belong to the login track (批次 2V1) and nothing in this host passes -cs today.
	{
		std::string stRegisterCmdLine;

		std::string stCmdLine = lpCmdLine ? lpCmdLine : "";

		stRegisterCmdLine ="__COMMAND_LINE__ = ";
		stRegisterCmdLine+='"';
		stRegisterCmdLine+=stCmdLine;
		stRegisterCmdLine+='"';

		const CHAR* c_szRegisterCmdLine=stRegisterCmdLine.c_str();
		if (!pyLauncher.RunLine(c_szRegisterCmdLine))
		{
			TraceError("RegisterCommandLine Error");
			return fail(error, "RegisterCommandLine Error: " + LastLogBoxMessage());
		}
	}
	// PORT: 40250 also honours "--pause-before-create-window" here with system("pause") and the XTrap
	// init check. Neither exists on this platform (no console to pause, no XTrap), so only the RunFile
	// is kept.
	{
		if (!pyLauncher.RunFile("system.py"))
		{
			TraceError("RunMain Error");
			return fail(error, "RunMain Error: " + LastLogBoxMessage());
		}
		// system.py catches failures in prototype.py and calls dbg.LogBox. Its outer
		// RunFile then succeeds, so surface that recorded failure to the Godot host.
		if (!LastLogBoxMessage().empty())
			return fail(error, "RunMain Error: " + LastLogBoxMessage());
	}

	NANOEND
	return true;
}
}

namespace PythonBoot
{

// PORT: the auto hunt window (AutoHuntScript.inc) as module mt_autohunt and the account registration
// window (RegisterScript.inc) as mt_register. They hook game.GameWindow / introLogin.LoginWindow, so they
// have to run once the root scripts are importable; a failure leaves the game without them, not broken.
#include "AutoHuntScript.inc"
#include "RegisterScript.inc"
#include "FrameRateOptionScript.inc"
#include "UIScaleOptionScript.inc"
#include "InventoryPagesScript.inc"
#include "MallHintScript.inc"

static void install_script_module(const char* c_szModule, const char* c_szScript)
{
	PyObject* module = PyImport_AddModule(c_szModule);
	PyObject* dict = module ? PyModule_GetDict(module) : nullptr;
	if (!dict)
	{
		PyErr_Clear();
		return;
	}
	if (!PyDict_GetItemString(dict, "__builtins__"))
		PyDict_SetItemString(dict, "__builtins__", PyEval_GetBuiltins());
	PyObject* result = PyRun_String(c_szScript, Py_file_input, dict, dict);
	if (!result)
	{
		TraceError("%s: install failed", c_szModule);
		PyErr_Print();
	}
	Py_XDECREF(result);
}

bool RunMainScript(const char* lpCmdLine, std::string* error)
{
	if (!g_launcher)
		return fail(error, "PythonBoot::Start has not run");
	if (g_fiber.alive)
		return fail(error, "RunMainScript is already running");

	g_fiber.turn = ScriptFiber::Host;
	g_fiber.finished = g_fiber.looping = g_fiber.quit = g_fiber.ok = false;
	g_fiber.error.clear();
	g_fiber.command_line = lpCmdLine ? lpCmdLine : "";

	// 40250's main thread has the default 1 MB Windows stack; Python frames are deep during
	// uiScriptLocale/ui imports, so give the script thread more than a secondary thread's default.
	pthread_attr_t attr;
	pthread_attr_init(&attr);
	pthread_attr_setstacksize(&attr, 16u * 1024u * 1024u);
	const int rc = pthread_create(&g_fiber.thread, &attr, fiber_main, nullptr);
	pthread_attr_destroy(&attr);
	if (rc != 0)
		return fail(error, "cannot start the script thread");
	g_fiber.alive = true;

	hand_to_script(); // until system.py parks in app.Loop() or returns
	if (g_fiber.finished)
	{
		join_fiber();
		if (!g_fiber.ok)
			return fail(error, g_fiber.error);
	}
	if (IsAppLooping())
	{
		install_script_module("mt_autohunt", c_szAutoHuntScript);
		install_script_module("mt_register", c_szRegisterScript);
		install_script_module("mt_framerate", c_szFrameRateOptionScript);
		install_script_module("mt_uiscale", c_szUIScaleOptionScript);
		install_script_module("mt_inventory", c_szInventoryPagesScript);
		install_script_module("mt_mallhint", c_szMallHintScript);
	}
	return true;
}

int ScriptThreadId()
{
	return g_script_thread_id;
}

bool IsAppLooping()
{
	return g_fiber.alive && g_fiber.looping && !g_fiber.finished;
}

bool AppFrame()
{
	if (!IsAppLooping())
		return false;
	hand_to_script();
	if (g_fiber.finished)
		join_fiber();
	return IsAppLooping();
}

bool AppLoopWait()
{
	if (!t_on_fiber)
		return false;
	g_fiber.looping = true;
	if (g_fiber.quit)
		return false;
	PyThreadState* state = PyEval_SaveThread();
	{
		std::unique_lock<std::mutex> lock(g_fiber.mutex);
		g_fiber.turn = ScriptFiber::Host;
		g_fiber.cv.notify_all();
		g_fiber.cv.wait(lock, [] { return g_fiber.turn == ScriptFiber::Script; });
	}
	PyEval_RestoreThread(state);
	return !g_fiber.quit;
}

void AppRequestQuit()
{
	g_fiber.quit = true;
}

bool RunLine(const char* source, std::string* error)
{
	if (!g_launcher)
		return fail(error, "PythonBoot::Start has not run");

	ClearLogBoxMessage();
	if (!g_launcher->RunLine(source ? source : ""))
		return fail(error, LastLogBoxMessage());
	return true;
}

bool Evaluate(const char* expression, std::string* result, std::string* error)
{
	// A host/test helper with no 40250 counterpart: RunLine stores str(expression) in __main__, read back here.
	if (!RunLine(("__mt_evaluate = str(" + std::string(expression ? expression : "None") + ")").c_str(), error))
		return false;
	PyObject* main = PyImport_AddModule("__main__");
	PyObject* value = main ? PyObject_GetAttrString(main, "__mt_evaluate") : nullptr;
	if (!value || !PyString_Check(value))
	{
		Py_XDECREF(value);
		PyErr_Clear();
		return fail(error, "evaluate: no result");
	}
	result->assign(PyString_AsString(value));
	Py_DECREF(value);
	PyObject_DelAttrString(main, "__mt_evaluate");
	return true;
}

void Stop()
{
	if (!g_launcher)
		return;
	// In 40250, closing the window ends Loop(); RunApp() then runs mainStream.Destroy() and returns.
	if (g_fiber.alive)
	{
		AppRequestQuit();
		while (g_fiber.alive && !g_fiber.finished)
			hand_to_script();
		join_fiber();
	}
	g_fiber.finished = false;
	// 40250 Main(): pyLauncher.Clear() runs before app->Destroy()/delete app, so the window manager
	// (a CPythonApplication member) is still alive while Py_Finalize runs the windows' __del__.
	if (Py_IsInitialized())
	{
		PyGILState_STATE gil = PyGILState_Ensure();
		PyRun_SimpleString(
			"import sys\n"
			"_mm = sys.modules.get('mouseModule')\n"
			"if _mm and hasattr(_mm, 'mouseController'):\n"
			"    getattr(_mm.mouseController, 'cursorDict', {}).clear()\n");
		PyGILState_Release(gil);
	}
	g_launcher->Clear();
	g_game_singletons.reset();
	g_game_application.reset();
	g_effect_manager.reset();
	g_game_event_manager.reset();
	g_race_manager.reset();
	g_server_state_checker.reset();
	g_flying_manager.reset();
	g_sound_manager->Destroy(); // 40250 CPythonApplication::Destroy (PythonApplication.cpp:1442)
	g_sound_manager.reset();
	g_player.reset();
	g_account_connector.reset();
	g_network_stream.reset();
	g_window_manager.reset();
	g_resource.reset();
	g_timer.reset();
	// PORT: 40250 leaves g_pkExceptionSender dangling once Main() returns; Boot can run again here.
	SetExceptionSender(NULL);
	g_exception_sender.reset();
	g_launcher.reset();
}

}

// winuser.h (common/shim/win32/winuser.h). WM_QUIT ends 40250's CPythonApplication::Loop; here the script
// fiber's loop ends the same way. The WM_QUIT is also queued for a GetMessage loop (CMSApplication).
void PostQuitMessage(int nExitCode)
{
	PostMessage(NULL, WM_QUIT, WPARAM(nExitCode), 0);
	PythonBoot::AppRequestQuit();
}