// This file is part of Notepad++ project
// Copyright (C)2021 Don HO <don.h@free.fr>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// at your option any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.


#include <time.h>
#include <shlwapi.h>
#include "Notepad_plus_Window.h"

const TCHAR Notepad_plus_Window::_className[32] = TEXT("Notepad++");
HWND Notepad_plus_Window::gNppHWND = NULL;



namespace // anonymous
{

	struct PaintLocker final
	{
		explicit PaintLocker(HWND handle)
			: handle(handle)
		{
			// disallow drawing on the window
			LockWindowUpdate(handle);
		}

		~PaintLocker()
		{
			// re-allow drawing for the window
			LockWindowUpdate(NULL);

			// force re-draw
			InvalidateRect(handle, nullptr, TRUE);
			RedrawWindow(handle, nullptr, NULL, RDW_ERASE | RDW_ALLCHILDREN | RDW_FRAME | RDW_INVALIDATE);
		}

		HWND handle;
	};

} // anonymous namespace


void Notepad_plus_Window::setStartupBgColor(COLORREF BgColor)
{
	RECT windowClientArea;
	HDC hdc = GetDCEx(_hSelf, NULL, DCX_CACHE | DCX_LOCKWINDOWUPDATE); //lock window update flag due to PaintLocker
	GetClientRect(_hSelf, &windowClientArea);
	FillRect(hdc, &windowClientArea, CreateSolidBrush(BgColor));
	ReleaseDC(_hSelf, hdc);
}



void Notepad_plus_Window::init(HINSTANCE hInst, HWND parent, const TCHAR *cmdLine, CmdLineParams *cmdLineParams)
{
	time_t timestampBegin = 0;
	if (cmdLineParams->_showLoadingTime)
		timestampBegin = time(NULL);

	Window::init(hInst, parent);
	WNDCLASS nppClass{};

	nppClass.style = CS_BYTEALIGNWINDOW | CS_DBLCLKS;
	nppClass.lpfnWndProc = Notepad_plus_Proc;
	nppClass.cbClsExtra = 0;
	nppClass.cbWndExtra = 0;
	nppClass.hInstance = _hInst;
	nppClass.hIcon = ::LoadIcon(hInst, MAKEINTRESOURCE(IDI_M30ICON));
	nppClass.hCursor = ::LoadCursor(NULL, IDC_ARROW);
	nppClass.hbrBackground = ::CreateSolidBrush(::GetSysColor(COLOR_MENU));
	nppClass.lpszMenuName = MAKEINTRESOURCE(IDR_M30_MENU);
	nppClass.lpszClassName = _className;

	_isPrelaunch = cmdLineParams->_isPreLaunch;

	if (!::RegisterClass(&nppClass))
	{
		throw std::runtime_error("Notepad_plus_Window::init : RegisterClass() function failed");
	}

	NppParameters& nppParams = NppParameters::getInstance();
	NppGUI & nppGUI = nppParams.getNppGUI();

	if (cmdLineParams->_isNoPlugin)
		_notepad_plus_plus_core._pluginsManager.disable();

	nppGUI._isCmdlineNosessionActivated = cmdLineParams->_isNoSession;

	_hIconAbsent = ::LoadIcon(hInst, MAKEINTRESOURCE(IDI_ICONABSENT));

	_hSelf = ::CreateWindowEx(
		WS_EX_ACCEPTFILES | (_notepad_plus_plus_core._nativeLangSpeaker.isRTL() ? WS_EX_LAYOUTRTL : 0),
		_className,
		TEXT("Notepad++"),
		(WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN),
		// CreateWindowEx bug : set all 0 to walk around the pb
		0, 0, 0, 0,
		_hParent, nullptr, _hInst,
		(LPVOID) this); // pass the ptr of this instantiated object
        // for retrieve it in Notepad_plus_Proc from
        // the CREATESTRUCT.lpCreateParams afterward.

	if (NULL == _hSelf)
		throw std::runtime_error("Notepad_plus_Window::init : CreateWindowEx() function return null");


	PaintLocker paintLocker{_hSelf};

	_notepad_plus_plus_core.staticCheckMenuAndTB();

	gNppHWND = _hSelf;

	if (cmdLineParams->isPointValid())
	{
		::MoveWindow(_hSelf, cmdLineParams->_point.x, cmdLineParams->_point.y, nppGUI._appPos.right, nppGUI._appPos.bottom, TRUE);
	}
	else
	{
		WINDOWPLACEMENT posInfo{};
		posInfo.length = sizeof(WINDOWPLACEMENT);
		posInfo.flags = 0;
		if (_isPrelaunch)
			posInfo.showCmd = SW_HIDE;
		else
			posInfo.showCmd = nppGUI._isMaximized ? SW_SHOWMAXIMIZED : SW_SHOWNORMAL;

		posInfo.ptMinPosition.x = (LONG)-1;
		posInfo.ptMinPosition.y = (LONG)-1;
		posInfo.ptMaxPosition.x = (LONG)-1;
		posInfo.ptMaxPosition.y = (LONG)-1;
		posInfo.rcNormalPosition.left   = nppGUI._appPos.left;
		posInfo.rcNormalPosition.top    = nppGUI._appPos.top;
		posInfo.rcNormalPosition.bottom = nppGUI._appPos.top + nppGUI._appPos.bottom;
		posInfo.rcNormalPosition.right  = nppGUI._appPos.left + nppGUI._appPos.right;

		//SetWindowPlacement will take care of situations, where saved position was in no longer available monitor
		::SetWindowPlacement(_hSelf,&posInfo);
		
		if (NppDarkMode::isEnabled())
			setStartupBgColor(NppDarkMode::getBackgroundColor()); //draw dark background when opening Npp without position data
	}

	if ((nppGUI._tabStatus & TAB_MULTILINE) != 0)
		::SendMessage(_hSelf, WM_COMMAND, IDM_VIEW_DRAWTABBAR_MULTILINE, 0);

	if (!nppGUI._menuBarShow)
		::SetMenu(_hSelf, NULL);

	if (cmdLineParams->_isNoTab || (nppGUI._tabStatus & TAB_HIDE))
	{
		const int tabStatusOld = nppGUI._tabStatus;
		::SendMessage(_hSelf, NPPM_HIDETABBAR, 0, TRUE);
		if (cmdLineParams->_isNoTab)
		{
			// Restore old settings when tab bar has been hidden from tab bar.
			nppGUI._tabStatus = tabStatusOld;
		}
	}

	if (cmdLineParams->_alwaysOnTop)
		::SendMessage(_hSelf, WM_COMMAND, IDM_VIEW_ALWAYSONTOP, 0);

	if (nppGUI._rememberLastSession && !nppGUI._isCmdlineNosessionActivated)
		_notepad_plus_plus_core.loadLastSession();

	if (nppParams.doFunctionListExport() || nppParams.doPrintAndExit())
	{
		::ShowWindow(_hSelf, SW_HIDE);
	}
	else if (!cmdLineParams->_isPreLaunch)
	{
		if (cmdLineParams->isPointValid())
			::ShowWindow(_hSelf, SW_SHOW);
		else
			::ShowWindow(_hSelf, nppGUI._isMaximized ? SW_MAXIMIZE : SW_SHOW);
	}
	else
	{
		HICON icon = nullptr;
		loadTrayIcon(_hInst, &icon);
		_notepad_plus_plus_core._pTrayIco = new trayIconControler(_hSelf, IDI_M30ICON, NPPM_INTERNAL_MINIMIZED_TRAY, icon, TEXT(""));
		_notepad_plus_plus_core._pTrayIco->doTrayIcon(ADD);
	}

	if(cmdLineParams->isPointValid() && NppDarkMode::isEnabled())
		setStartupBgColor(NppDarkMode::getBackgroundColor()); //draw dark background when opening Npp through cmd with position data

	std::vector<generic_string> fileNames;
	std::vector<generic_string> patterns;
	patterns.push_back(TEXT("*.xml"));

	generic_string nppDir = nppParams.getNppPath();

	LocalizationSwitcher & localizationSwitcher = nppParams.getLocalizationSwitcher();
	std::wstring localizationDir = nppDir;
	pathAppend(localizationDir, TEXT("localization\\"));

	_notepad_plus_plus_core.getMatchedFileNames(localizationDir.c_str(), 0, patterns, fileNames, false, false);
	for (size_t i = 0, len = fileNames.size(); i < len; ++i)
		localizationSwitcher.addLanguageFromXml(fileNames[i]);

	fileNames.clear();
	ThemeSwitcher & themeSwitcher = nppParams.getThemeSwitcher();

	//  Get themes from both npp install themes dir and app data themes dir with the per user
	//  overriding default themes of the same name.

	generic_string appDataThemeDir = nppParams.isCloud() ? nppParams.getUserPath() : nppParams.getAppDataNppDir();
	if (!appDataThemeDir.empty())
	{
		pathAppend(appDataThemeDir, TEXT("themes\\"));
		_notepad_plus_plus_core.getMatchedFileNames(appDataThemeDir.c_str(), 0, patterns, fileNames, false, false);
		for (size_t i = 0, len = fileNames.size() ; i < len ; ++i)
		{
			themeSwitcher.addThemeFromXml(fileNames[i]);
		}
	}

	fileNames.clear();

	generic_string nppThemeDir = nppDir.c_str(); // <- should use the pointer to avoid the constructor of copy
	pathAppend(nppThemeDir, TEXT("themes\\"));

	// Set theme directory to their installation directory
	themeSwitcher.setThemeDirPath(nppThemeDir);

	_notepad_plus_plus_core.getMatchedFileNames(nppThemeDir.c_str(), 0, patterns, fileNames, false, false);
	for (size_t i = 0, len = fileNames.size(); i < len ; ++i)
	{
		generic_string themeName( themeSwitcher.getThemeFromXmlFileName(fileNames[i].c_str()) );
		if (!themeSwitcher.themeNameExists(themeName.c_str()))
		{
			themeSwitcher.addThemeFromXml(fileNames[i]);
			
			if (!appDataThemeDir.empty())
			{
				generic_string appDataThemePath = appDataThemeDir;

				if (!::PathFileExists(appDataThemePath.c_str()))
				{
					::CreateDirectory(appDataThemePath.c_str(), NULL);
				}

				TCHAR* fn = PathFindFileName(fileNames[i].c_str());
				pathAppend(appDataThemePath, fn);
				themeSwitcher.addThemeStylerSavePath(fileNames[i], appDataThemePath);
			}
		}
	}

	if (NppDarkMode::isWindowsModeEnabled())
	{
		generic_string themePath;
		generic_string xmlFileName = NppDarkMode::getThemeName();
		if (!xmlFileName.empty())
		{
			if (!nppParams.isLocal() || nppParams.isCloud())
			{
				themePath = nppParams.getUserPath();
				pathAppend(themePath, TEXT("themes\\"));
				pathAppend(themePath, xmlFileName);
			}

			if (::PathFileExists(themePath.c_str()) == FALSE || themePath.empty())
			{
				themePath = themeSwitcher.getThemeDirPath();
				pathAppend(themePath, xmlFileName);
			}
		}
		else
		{
			auto& themeInfo = themeSwitcher.getElementFromIndex(0);
			themePath = themeInfo.second;
		}

		if (::PathFileExists(themePath.c_str()) == TRUE)
		{
			nppGUI._themeName.assign(themePath);
			nppParams.reloadStylers(themePath.c_str());
			::SendMessage(_hSelf, WM_UPDATESCINTILLAS, 0, 0);
		}
	}

	// Restore all dockable panels from the last session
	for (size_t i = 0, len = _notepad_plus_plus_core._internalFuncIDs.size() ; i < len ; ++i)
		::SendMessage(_hSelf, WM_COMMAND, _notepad_plus_plus_core._internalFuncIDs[i], 0);

	std::vector<generic_string> fns;
	if (cmdLine)
		fns = _notepad_plus_plus_core.loadCommandlineParams(cmdLine, cmdLineParams);

	// Launch folder as workspace after all this dockable panel being restored from the last session
	// To avoid dockable panel toggle problem.
	if (cmdLineParams->_openFoldersAsWorkspace)
	{
		generic_string emptyStr;
		_notepad_plus_plus_core.launchFileBrowser(fns, emptyStr, true);
	}
	::SendMessage(_hSelf, WM_ACTIVATE, WA_ACTIVE, 0);

	::SendMessage(_hSelf, NPPM_INTERNAL_CRLFFORMCHANGED, 0, 0);

	::SendMessage(_hSelf, NPPM_INTERNAL_NPCFORMCHANGED, 0, 0);

	::SendMessage(_hSelf, NPPM_INTERNAL_ENABLECHANGEHISTORY, 0, 0);


	if (nppGUI._newDocDefaultSettings._addNewDocumentOnStartup && nppGUI._rememberLastSession)
	{
		::SendMessage(_hSelf, WM_COMMAND, IDM_FILE_NEW, 0);
	}

	// Notify plugins that Notepad++ is ready
	SCNotification scnN{};
	scnN.nmhdr.code = NPPN_READY;
	scnN.nmhdr.hwndFrom = _hSelf;
	scnN.nmhdr.idFrom = 0;
	_notepad_plus_plus_core._pluginsManager.notify(&scnN);

	if (!cmdLineParams->_easterEggName.empty())
	{
		if (cmdLineParams->_quoteType == 0) // Easter Egg Name
		{
			int iQuote = _notepad_plus_plus_core.getQuoteIndexFrom(cmdLineParams->_easterEggName.c_str());
			if (iQuote != -1)
			{
				_notepad_plus_plus_core.showQuoteFromIndex(iQuote);
			}
		}
		else if (cmdLineParams->_quoteType == 1) // command line quote
		{
			_userQuote = cmdLineParams->_easterEggName;
			_quoteParams.reset();
			_quoteParams._quote = _userQuote.c_str();
			_quoteParams._quoter = TEXT("Anonymous #999");
			_quoteParams._shouldBeTrolling = false;
			_quoteParams._lang = cmdLineParams->_langType;
			if (cmdLineParams->_ghostTypingSpeed == 1)
				_quoteParams._speed = QuoteParams::slow;
			else if (cmdLineParams->_ghostTypingSpeed == 2)
				_quoteParams._speed = QuoteParams::rapid;
			else if (cmdLineParams->_ghostTypingSpeed == 3)
				_quoteParams._speed = QuoteParams::speedOfLight;

			_notepad_plus_plus_core.showQuote(&_quoteParams);
		}
		else if (cmdLineParams->_quoteType == 2) // content drom file
		{
			if (::PathFileExists(cmdLineParams->_easterEggName.c_str()))
			{
				std::string content = getFileContent(cmdLineParams->_easterEggName.c_str());
				WcharMbcsConvertor& wmc = WcharMbcsConvertor::getInstance();
				_userQuote = wmc.char2wchar(content.c_str(), SC_CP_UTF8);
				if (!_userQuote.empty())
				{
					_quoteParams.reset();
					_quoteParams._quote = _userQuote.c_str();
					_quoteParams._quoter = TEXT("Anonymous #999");
					_quoteParams._shouldBeTrolling = false;
					_quoteParams._lang = cmdLineParams->_langType;
					if (cmdLineParams->_ghostTypingSpeed == 1)
						_quoteParams._speed = QuoteParams::slow;
					else if (cmdLineParams->_ghostTypingSpeed == 2)
						_quoteParams._speed = QuoteParams::rapid;
					else if (cmdLineParams->_ghostTypingSpeed == 3)
						_quoteParams._speed = QuoteParams::speedOfLight;

					_notepad_plus_plus_core.showQuote(&_quoteParams);
				}
			}
		}
	}

	if (cmdLineParams->_showLoadingTime)
	{
		time_t timestampEnd = time(NULL);
		double loadTime = difftime(timestampEnd, timestampBegin);

		char dest[256];
		sprintf(dest, "Loading time : %.0lf seconds", loadTime);
		::MessageBoxA(NULL, dest, "", MB_OK);
	}

	bool isSnapshotMode = nppGUI.isSnapshotMode();
	if (isSnapshotMode)
	{
		_notepad_plus_plus_core.checkModifiedDocument(false);
		// Lauch backup task
		_notepad_plus_plus_core.launchDocumentBackupTask();
	}

	// Make this call later to take effect
	::SendMessage(_hSelf, NPPM_INTERNAL_SETWORDCHARS, 0, 0);
	::SendMessage(_hSelf, NPPM_INTERNAL_SETNPC, 0, 0);

	if (nppParams.doFunctionListExport())
		::SendMessage(_hSelf, NPPM_INTERNAL_EXPORTFUNCLISTANDQUIT, 0, 0);

	if (nppParams.doPrintAndExit())
		::SendMessage(_hSelf, NPPM_INTERNAL_PRNTANDQUIT, 0, 0);
}


bool Notepad_plus_Window::isDlgsMsg(MSG *msg) const
{
	for (size_t i = 0, len = _notepad_plus_plus_core._hModelessDlgs.size(); i < len; ++i)
	{
		if (_notepad_plus_plus_core.processIncrFindAccel(msg))
			return true;

		if (_notepad_plus_plus_core.processFindAccel(msg))
			return true;

		if (::IsDialogMessageW(_notepad_plus_plus_core._hModelessDlgs[i], msg))
			return true;
	}
	return false;
}
