/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2012 Synergy Si Ltd.
 * Copyright (C) 2002 Chris Schoeneman
 * 
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file COPYING that should have accompanied this file.
 * 
 * This package 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 <http://www.gnu.org/licenses/>.
 */

#include "synergy/win32/AppUtilWindows.h"
#include "synergy/Screen.h"
#include "synergy/ArgsBase.h"
#include "synergy/App.h"
#include "synergy/XSynergy.h"
#include "platform/MSWindowsScreen.h"
#include "arch/win32/XArchWindows.h"
#include "arch/win32/ArchMiscWindows.h"
#include "arch/IArchTaskBarReceiver.h"
#include "base/Log.h"
#include "base/log_outputters.h"
#include "base/IEventQueue.h"
#include "base/Event.h"
#include "base/EventQueue.h"
#include "common/Version.h"

#include <sstream>
#include <iostream>
#include <conio.h>

AppUtilWindows::AppUtilWindows(IEventQueue* events) :
	m_events(events),
	m_exitMode(kExitModeNormal)
{
	if (SetConsoleCtrlHandler((PHANDLER_ROUTINE)consoleHandler, TRUE) == FALSE)
    {
		throw XArch(new XArchEvalWindows());
    }
}

AppUtilWindows::~AppUtilWindows()
{
}

BOOL WINAPI AppUtilWindows::consoleHandler(DWORD)
{
	LOG((CLOG_INFO "got shutdown signal"));
	IEventQueue* events = AppUtil::instance().app().getEvents();
	events->addEvent(Event(Event::kQuit));
    return TRUE;
}

static
int 
mainLoopStatic() 
{
	return AppUtil::instance().app().mainLoop();
}

int 
AppUtilWindows::daemonNTMainLoop(int argc, const char** argv)
{
	app().initApp(argc, argv);
	debugServiceWait();

	// NB: what the hell does this do?!
	app().argsBase().m_backend = false;
	
	return ArchMiscWindows::runDaemon(mainLoopStatic);
}

void 
AppUtilWindows::exitApp(int code)
{
	switch (m_exitMode) {

		case kExitModeDaemon:
			ArchMiscWindows::daemonFailed(code);
			break;

		default:
			throw XExitApp(code);
	}
}

int daemonNTMainLoopStatic(int argc, const char** argv)
{
	return AppUtilWindows::instance().daemonNTMainLoop(argc, argv);
}

int 
AppUtilWindows::daemonNTStartup(int, char**)
{
	SystemLogger sysLogger(app().daemonName(), false);
	m_exitMode = kExitModeDaemon;
	return ARCH->daemonize(app().daemonName(), daemonNTMainLoopStatic);
}

static
int
daemonNTStartupStatic(int argc, char** argv)
{
	return AppUtilWindows::instance().daemonNTStartup(argc, argv);
}

static
int
foregroundStartupStatic(int argc, char** argv)
{
	return AppUtil::instance().app().foregroundStartup(argc, argv);
}

void
AppUtilWindows::beforeAppExit()
{
	// this can be handy for debugging, since the application is launched in
	// a new console window, and will normally close on exit (making it so
	// that we can't see error messages).
	if (app().argsBase().m_pauseOnExit) {
		std::cout << std::endl << "press any key to exit..." << std::endl;
		int c = _getch();
	}
}

int
AppUtilWindows::run(int argc, char** argv)
{
    OSVERSIONINFO osvi;
    ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
    GetVersionEx(&osvi);

    if (osvi.dwMajorVersion < 5 || (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion < 1)) {
		throw std::runtime_error("synergy only supports windows xp and above.");
    }

	// record window instance for tray icon, etc
	ArchMiscWindows::setInstanceWin32(GetModuleHandle(NULL));

	MSWindowsScreen::init(ArchMiscWindows::instanceWin32());
	Thread::getCurrentThread().setPriority(-14);

	StartupFunc startup;
	if (ArchMiscWindows::wasLaunchedAsService()) {
		startup = &daemonNTStartupStatic;
	} else {
		startup = &foregroundStartupStatic;
		app().argsBase().m_daemon = false;
	}

	return app().runInner(argc, argv, NULL, startup);
}

AppUtilWindows& 
AppUtilWindows::instance()
{
	return (AppUtilWindows&)AppUtil::instance();
}

void 
AppUtilWindows::debugServiceWait()
{
	if (app().argsBase().m_debugServiceWait)
	{
		while(true)
		{
			// this code is only executed when the process is launched via the
			// windows service controller (and --debug-service-wait arg is 
			// used). to debug, set a breakpoint on this line so that 
			// execution is delayed until the debugger is attached.
			ARCH->sleep(1);
			LOG((CLOG_INFO "waiting for debugger to attach"));
		}
	}
}

void 
AppUtilWindows::startNode()
{
	app().startNode();
}