/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

// Disable symbol overrides so that we can use system headers.
#define FORBIDDEN_SYMBOL_ALLOW_ALL

#include "common/scummsys.h"
#include "common/error.h"
#include "common/textconsole.h"

#ifdef WIN32

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef ARRAYSIZE // winnt.h defines ARRAYSIZE, but we want our own one...
#include <shellapi.h>

#include <SDL_syswm.h> // For setting the icon

#include "backends/platform/sdl/win32/win32.h"
#include "backends/fs/windows/windows-fs-factory.h"
#include "backends/taskbar/win32/win32-taskbar.h"

#include "common/memstream.h"

#define DEFAULT_CONFIG_FILE "scummvm.ini"

//#define	HIDE_CONSOLE

#ifdef HIDE_CONSOLE
struct SdlConsoleHidingWin32 {
	DWORD myPid;
	DWORD myTid;
	HWND consoleHandle;
};

// console hiding for win32
static BOOL CALLBACK initBackendFindConsoleWin32Proc(HWND hWnd, LPARAM lParam) {
	DWORD pid, tid;
	SdlConsoleHidingWin32 *variables = (SdlConsoleHidingWin32 *)lParam;
	tid = GetWindowThreadProcessId(hWnd, &pid);
	if ((tid == variables->myTid) && (pid == variables->myPid)) {
		variables->consoleHandle = hWnd;
		return FALSE;
	}
	return TRUE;
}

#endif

void OSystem_Win32::init() {
#ifdef HIDE_CONSOLE
	// console hiding for win32
	SdlConsoleHidingWin32 consoleHidingWin32;
	consoleHidingWin32.consoleHandle = 0;
	consoleHidingWin32.myPid = GetCurrentProcessId();
	consoleHidingWin32.myTid = GetCurrentThreadId();
	EnumWindows (initBackendFindConsoleWin32Proc, (LPARAM)&consoleHidingWin32);

	if (!ConfMan.getBool("show_console")) {
		if (consoleHidingWin32.consoleHandle) {
			// We won't find a window with our TID/PID in case we were started from command-line
			ShowWindow(consoleHidingWin32.consoleHandle, SW_HIDE);
		}
	}
#endif

	// Initialize File System Factory
	_fsFactory = new WindowsFilesystemFactory();

#if defined(USE_TASKBAR)
	// Initialize taskbar manager
	_taskbarManager = new Win32TaskbarManager();
#endif

	// Invoke parent implementation of this method
	OSystem_SDL::init();
}


bool OSystem_Win32::hasFeature(Feature f) {
	if (f == kFeatureDisplayLogFile)
		return true;

	return OSystem_SDL::hasFeature(f);
}

bool OSystem_Win32::displayLogFile() {
	if (_logFilePath.empty())
		return false;

	// Try opening the log file with the default text editor
	// log files should be registered as "txtfile" by default and thus open in the default text editor
	HINSTANCE shellExec = ShellExecute(NULL, NULL, _logFilePath.c_str(), NULL, NULL, SW_SHOWNORMAL);
	if ((intptr_t)shellExec > 32)
		return true;

	// ShellExecute with the default verb failed, try the "Open with..." dialog
	PROCESS_INFORMATION processInformation;
	STARTUPINFO startupInfo;
	memset(&processInformation, 0, sizeof(processInformation));
	memset(&startupInfo, 0, sizeof(startupInfo));
	startupInfo.cb = sizeof(startupInfo);

	char cmdLine[MAX_PATH * 2];  // CreateProcess may change the contents of cmdLine
	sprintf(cmdLine, "rundll32 shell32.dll,OpenAs_RunDLL %s", _logFilePath.c_str());
	BOOL result = CreateProcess(NULL,
	                            cmdLine,
	                            NULL,
	                            NULL,
	                            FALSE,
	                            NORMAL_PRIORITY_CLASS,
	                            NULL,
	                            NULL,
	                            &startupInfo,
	                            &processInformation);
	if (result)
		return true;

	return false;
}

void OSystem_Win32::setupIcon() {
	HMODULE handle = GetModuleHandle(NULL);
	HICON   ico    = LoadIcon(handle, MAKEINTRESOURCE(1001 /* IDI_ICON */));
	if (ico) {
		SDL_SysWMinfo  wminfo;
		SDL_VERSION(&wminfo.version);
		if (SDL_GetWMInfo(&wminfo)) {
			// Replace the handle to the icon associated with the window class by our custom icon
			SetClassLongPtr(wminfo.window, GCLP_HICON, (ULONG_PTR)ico);

			// Since there wasn't any default icon, we can't use the return value from SetClassLong
			// to check for errors (it would be 0 in both cases: error or no previous value for the
			// icon handle). Instead we check for the last-error code value.
			if (GetLastError() == ERROR_SUCCESS)
				return;
		}
	}

	// If no icon has been set, fallback to default path
	OSystem_SDL::setupIcon();
}

Common::String OSystem_Win32::getDefaultConfigFileName() {
	char configFile[MAXPATHLEN];

	OSVERSIONINFO win32OsVersion;
	ZeroMemory(&win32OsVersion, sizeof(OSVERSIONINFO));
	win32OsVersion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	GetVersionEx(&win32OsVersion);
	// Check for non-9X version of Windows.
	if (win32OsVersion.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) {
		// Use the Application Data directory of the user profile.
		if (win32OsVersion.dwMajorVersion >= 5) {
			if (!GetEnvironmentVariable("APPDATA", configFile, sizeof(configFile)))
				error("Unable to access application data directory");
		} else {
			if (!GetEnvironmentVariable("USERPROFILE", configFile, sizeof(configFile)))
				error("Unable to access user profile directory");

			strcat(configFile, "\\Application Data");

			// If the directory already exists (as it should in most cases),
			// we don't want to fail, but we need to stop on other errors (such as ERROR_PATH_NOT_FOUND)
			if (!CreateDirectory(configFile, NULL)) {
				if (GetLastError() != ERROR_ALREADY_EXISTS)
					error("Cannot create Application data folder");
			}
		}

		strcat(configFile, "\\ScummVM");
		if (!CreateDirectory(configFile, NULL)) {
			if (GetLastError() != ERROR_ALREADY_EXISTS)
				error("Cannot create ScummVM application data folder");
		}

		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);

		FILE *tmp = NULL;
		if ((tmp = fopen(configFile, "r")) == NULL) {
			// Check windows directory
			char oldConfigFile[MAXPATHLEN];
			uint ret = GetWindowsDirectory(oldConfigFile, MAXPATHLEN);
			if (ret == 0 || ret > MAXPATHLEN)
				error("Cannot retrieve the path of the Windows directory");

			strcat(oldConfigFile, "\\" DEFAULT_CONFIG_FILE);
			if ((tmp = fopen(oldConfigFile, "r"))) {
				strcpy(configFile, oldConfigFile);

				fclose(tmp);
			}
		} else {
			fclose(tmp);
		}
	} else {
		// Check windows directory
		uint ret = GetWindowsDirectory(configFile, MAXPATHLEN);
		if (ret == 0 || ret > MAXPATHLEN)
			error("Cannot retrieve the path of the Windows directory");

		strcat(configFile, "\\" DEFAULT_CONFIG_FILE);
	}

	return configFile;
}

Common::WriteStream *OSystem_Win32::createLogFile() {
	// Start out by resetting _logFilePath, so that in case
	// of a failure, we know that no log file is open.
	_logFilePath.clear();

	char logFile[MAXPATHLEN];

	OSVERSIONINFO win32OsVersion;
	ZeroMemory(&win32OsVersion, sizeof(OSVERSIONINFO));
	win32OsVersion.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
	GetVersionEx(&win32OsVersion);
	// Check for non-9X version of Windows.
	if (win32OsVersion.dwPlatformId != VER_PLATFORM_WIN32_WINDOWS) {
		// Use the Application Data directory of the user profile.
		if (win32OsVersion.dwMajorVersion >= 5) {
			if (!GetEnvironmentVariable("APPDATA", logFile, sizeof(logFile)))
				error("Unable to access application data directory");
		} else {
			if (!GetEnvironmentVariable("USERPROFILE", logFile, sizeof(logFile)))
				error("Unable to access user profile directory");

			strcat(logFile, "\\Application Data");
			CreateDirectory(logFile, NULL);
		}

		strcat(logFile, "\\ScummVM");
		CreateDirectory(logFile, NULL);
		strcat(logFile, "\\Logs");
		CreateDirectory(logFile, NULL);
		strcat(logFile, "\\scummvm.log");

		Common::FSNode file(logFile);
		Common::WriteStream *stream = file.createWriteStream();
		if (stream)
			_logFilePath= logFile;

		return stream;
	} else {
		return 0;
	}
}

namespace {

class Win32ResourceArchive : public Common::Archive {
	friend BOOL CALLBACK EnumResNameProc(HMODULE hModule, LPCTSTR lpszType, LPTSTR lpszName, LONG_PTR lParam);
public:
	Win32ResourceArchive();

	virtual bool hasFile(const Common::String &name);
	virtual int listMembers(Common::ArchiveMemberList &list);
	virtual Common::ArchiveMemberPtr getMember(const Common::String &name);
	virtual Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
private:
	typedef Common::List<Common::String> FilenameList;

	FilenameList _files;
};

BOOL CALLBACK EnumResNameProc(HMODULE hModule, LPCTSTR lpszType, LPTSTR lpszName, LONG_PTR lParam) {
	if (IS_INTRESOURCE(lpszName))
		return TRUE;

	Win32ResourceArchive *arch = (Win32ResourceArchive *)lParam;
	arch->_files.push_back(lpszName);
	return TRUE;
}

Win32ResourceArchive::Win32ResourceArchive() {
	EnumResourceNames(NULL, MAKEINTRESOURCE(256), &EnumResNameProc, (LONG_PTR)this);
}

bool Win32ResourceArchive::hasFile(const Common::String &name) {
	for (FilenameList::const_iterator i = _files.begin(); i != _files.end(); ++i) {
		if (i->equalsIgnoreCase(name))
			return true;
	}

	return false;
}

int Win32ResourceArchive::listMembers(Common::ArchiveMemberList &list) {
	int count = 0;

	for (FilenameList::const_iterator i = _files.begin(); i != _files.end(); ++i, ++count)
		list.push_back(Common::ArchiveMemberPtr(new Common::GenericArchiveMember(*i, this)));

	return count;
}

Common::ArchiveMemberPtr Win32ResourceArchive::getMember(const Common::String &name) {
	return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
}

Common::SeekableReadStream *Win32ResourceArchive::createReadStreamForMember(const Common::String &name) const {
	HRSRC resource = FindResource(NULL, name.c_str(), MAKEINTRESOURCE(256));

	if (resource == NULL)
		return 0;

	HGLOBAL handle = LoadResource(NULL, resource);

	if (handle == NULL)
		return 0;

	const byte *data = (const byte *)LockResource(handle);

	if (data == NULL)
		return 0;

	uint32 size = SizeofResource(NULL, resource);

	if (size == 0)
		return 0;

	return new Common::MemoryReadStream(data, size);
}

} // End of anonymous namespace

void OSystem_Win32::addSysArchivesToSearchSet(Common::SearchSet &s, int priority) {
	s.add("Win32Res", new Win32ResourceArchive(), priority);

	OSystem_SDL::addSysArchivesToSearchSet(s, priority);
}

#endif