/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.

This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").

Doom 3 Source Code 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.

Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "sys/platform.h"
#include "idlib/CmdArgs.h"
#include "framework/async/AsyncNetwork.h"
#include "framework/Licensee.h"
#include "framework/UsercmdGen.h"
#include "renderer/tr_local.h"
#include "sys/win32/rc/CreateResourceIDs.h"
#include "sys/sys_local.h"

#include "sys/win32/win_local.h"

#include <errno.h>
#include <float.h>
#include <fcntl.h>
#include <direct.h>
#include <io.h>
#include <conio.h>
#include <shellapi.h>

#ifndef __MRC__
#include <sys/types.h>
#include <sys/stat.h>
#endif

#include <SDL_main.h>

idCVar Win32Vars_t::win_outputDebugString( "win_outputDebugString", "0", CVAR_SYSTEM | CVAR_BOOL, "" );
idCVar Win32Vars_t::win_outputEditString( "win_outputEditString", "1", CVAR_SYSTEM | CVAR_BOOL, "" );
idCVar Win32Vars_t::win_viewlog( "win_viewlog", "0", CVAR_SYSTEM | CVAR_INTEGER, "" );
idCVar Win32Vars_t::win_allowMultipleInstances( "win_allowMultipleInstances", "0", CVAR_SYSTEM | CVAR_BOOL, "allow multiple instances running concurrently" );

Win32Vars_t	win32;

static sysMemoryStats_t exeLaunchMemoryStats;

/*
================
Sys_GetExeLaunchMemoryStatus
================
*/
void Sys_GetExeLaunchMemoryStatus( sysMemoryStats_t &stats ) {
	stats = exeLaunchMemoryStats;
}

/*
==================
Sys_FlushCacheMemory

On windows, the vertex buffers are write combined, so they
don't need to be flushed from the cache
==================
*/
void Sys_FlushCacheMemory( void *base, int bytes ) {
}

/*
=============
Sys_Error

Show the early console as an error dialog
=============
*/
void Sys_Error( const char *error, ... ) {
	va_list		argptr;
	char		text[4096];
	MSG        msg;

	va_start( argptr, error );
	vsprintf( text, error, argptr );
	va_end( argptr);

	printf("%s", text);

	Conbuf_AppendText( text );
	Conbuf_AppendText( "\n" );

	Win_SetErrorText( text );
	Sys_ShowConsole( 1, true );

	timeEndPeriod( 1 );

	Sys_ShutdownInput();

	GLimp_Shutdown();

	// wait for the user to quit
	while ( 1 ) {
		if ( !GetMessage( &msg, NULL, 0, 0 ) ) {
			common->Quit();
		}
		TranslateMessage( &msg );
		DispatchMessage( &msg );
	}

	Sys_DestroyConsole();

	exit (1);
}

/*
==============
Sys_Quit
==============
*/
void Sys_Quit( void ) {
	timeEndPeriod( 1 );
	Sys_ShutdownInput();
	Sys_DestroyConsole();
	ExitProcess( 0 );
}


/*
==============
Sys_Printf
==============
*/
#define MAXPRINTMSG 4096
void Sys_Printf( const char *fmt, ... ) {
	char		msg[MAXPRINTMSG];

	va_list argptr;
	va_start(argptr, fmt);
	idStr::vsnPrintf( msg, MAXPRINTMSG-1, fmt, argptr );
	va_end(argptr);
	msg[sizeof(msg)-1] = '\0';

	printf("%s", msg);

	if ( win32.win_outputDebugString.GetBool() ) {
		OutputDebugString( msg );
	}
	if ( win32.win_outputEditString.GetBool() ) {
		Conbuf_AppendText( msg );
	}
}

/*
==============
Sys_DebugPrintf
==============
*/
#define MAXPRINTMSG 4096
void Sys_DebugPrintf( const char *fmt, ... ) {
	char msg[MAXPRINTMSG];

	va_list argptr;
	va_start( argptr, fmt );
	idStr::vsnPrintf( msg, MAXPRINTMSG-1, fmt, argptr );
	msg[ sizeof(msg)-1 ] = '\0';
	va_end( argptr );

	printf("%s", msg);

	OutputDebugString( msg );
}

/*
==============
Sys_DebugVPrintf
==============
*/
void Sys_DebugVPrintf( const char *fmt, va_list arg ) {
	char msg[MAXPRINTMSG];

	idStr::vsnPrintf( msg, MAXPRINTMSG-1, fmt, arg );
	msg[ sizeof(msg)-1 ] = '\0';

	printf("%s", msg);

	OutputDebugString( msg );
}

/*
==============
Sys_ShowWindow
==============
*/
void Sys_ShowWindow( bool show ) {
	::ShowWindow( win32.hWnd, show ? SW_SHOW : SW_HIDE );
}

/*
==============
Sys_IsWindowVisible
==============
*/
bool Sys_IsWindowVisible( void ) {
	return ( ::IsWindowVisible( win32.hWnd ) != 0 );
}

/*
==============
Sys_Mkdir
==============
*/
void Sys_Mkdir( const char *path ) {
	_mkdir (path);
}

/*
=================
Sys_FileTimeStamp
=================
*/
ID_TIME_T Sys_FileTimeStamp( FILE *fp ) {
	struct _stat st;
	_fstat( _fileno( fp ), &st );
	return (long) st.st_mtime;
}

/*
==============
Sys_Cwd
==============
*/
const char *Sys_Cwd( void ) {
	static char cwd[MAX_OSPATH];

	_getcwd( cwd, sizeof( cwd ) - 1 );
	cwd[MAX_OSPATH-1] = 0;

	return cwd;
}

/*
==============
Sys_DefaultCDPath
==============
*/
const char *Sys_DefaultCDPath( void ) {
	return "";
}

/*
==============
Sys_DefaultBasePath
==============
*/
const char *Sys_DefaultBasePath( void ) {
	return Sys_Cwd();
}

/*
==============
Sys_DefaultSavePath
==============
*/
const char *Sys_DefaultSavePath( void ) {
	return cvarSystem->GetCVarString( "fs_basepath" );
}

/*
==============
Sys_EXEPath
==============
*/
const char *Sys_EXEPath( void ) {
	static char exe[ MAX_OSPATH ];
	GetModuleFileName( NULL, exe, sizeof( exe ) - 1 );
	return exe;
}

/*
==============
Sys_ListFiles
==============
*/
int Sys_ListFiles( const char *directory, const char *extension, idStrList &list ) {
	idStr		search;
	struct _finddata_t findinfo;
	int			findhandle;
	int			flag;

	if ( !extension) {
		extension = "";
	}

	// passing a slash as extension will find directories
	if ( extension[0] == '/' && extension[1] == 0 ) {
		extension = "";
		flag = 0;
	} else {
		flag = _A_SUBDIR;
	}

	sprintf( search, "%s\\*%s", directory, extension );

	// search
	list.Clear();

	findhandle = _findfirst( search, &findinfo );
	if ( findhandle == -1 ) {
		return -1;
	}

	do {
		if ( flag ^ ( findinfo.attrib & _A_SUBDIR ) ) {
			list.Append( findinfo.name );
		}
	} while ( _findnext( findhandle, &findinfo ) != -1 );

	_findclose( findhandle );

	return list.Num();
}


/*
================
Sys_GetClipboardData
================
*/
char *Sys_GetClipboardData( void ) {
	char *data = NULL;
	char *cliptext;

	if ( OpenClipboard( NULL ) != 0 ) {
		HANDLE hClipboardData;

		if ( ( hClipboardData = GetClipboardData( CF_TEXT ) ) != 0 ) {
			if ( ( cliptext = (char *)GlobalLock( hClipboardData ) ) != 0 ) {
				data = (char *)Mem_Alloc( GlobalSize( hClipboardData ) + 1 );
				strcpy( data, cliptext );
				GlobalUnlock( hClipboardData );

				strtok( data, "\n\r\b" );
			}
		}
		CloseClipboard();
	}
	return data;
}

/*
================
Sys_SetClipboardData
================
*/
void Sys_SetClipboardData( const char *string ) {
	HGLOBAL HMem;
	char *PMem;

	// allocate memory block
	HMem = (char *)::GlobalAlloc( GMEM_MOVEABLE | GMEM_DDESHARE, strlen( string ) + 1 );
	if ( HMem == NULL ) {
		return;
	}
	// lock allocated memory and obtain a pointer
	PMem = (char *)::GlobalLock( HMem );
	if ( PMem == NULL ) {
		return;
	}
	// copy text into allocated memory block
	lstrcpy( PMem, string );
	// unlock allocated memory
	::GlobalUnlock( HMem );
	// open Clipboard
	if ( !OpenClipboard( 0 ) ) {
		::GlobalFree( HMem );
		return;
	}
	// remove current Clipboard contents
	EmptyClipboard();
	// supply the memory handle to the Clipboard
	SetClipboardData( CF_TEXT, HMem );
	HMem = 0;
	// close Clipboard
	CloseClipboard();
}

/*
========================================================================

DLL Loading

========================================================================
*/

/*
=====================
Sys_DLL_Load
=====================
*/
uintptr_t Sys_DLL_Load( const char *dllName ) {
	HINSTANCE	libHandle;
	libHandle = LoadLibrary( dllName );
	if ( libHandle ) {
		// since we can't have LoadLibrary load only from the specified path, check it did the right thing
		char loadedPath[ MAX_OSPATH ];
		GetModuleFileName( libHandle, loadedPath, sizeof( loadedPath ) - 1 );
		if ( idStr::IcmpPath( dllName, loadedPath ) ) {
			Sys_Printf( "ERROR: LoadLibrary '%s' wants to load '%s'\n", dllName, loadedPath );
			Sys_DLL_Unload( (int)libHandle );
			return 0;
		}
	}
	return (uintptr_t)libHandle;
}

/*
=====================
Sys_DLL_GetProcAddress
=====================
*/
void *Sys_DLL_GetProcAddress( uintptr_t dllHandle, const char *procName ) {
	return (void *)GetProcAddress( (HINSTANCE)dllHandle, procName );
}

/*
=====================
Sys_DLL_Unload
=====================
*/
void Sys_DLL_Unload( uintptr_t dllHandle ) {
	if ( !dllHandle ) {
		return;
	}
	if ( FreeLibrary( (HINSTANCE)dllHandle ) == 0 ) {
		int lastError = GetLastError();
		LPVOID lpMsgBuf;
		FormatMessage(
			FORMAT_MESSAGE_ALLOCATE_BUFFER,
		    NULL,
			lastError,
			MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
			(LPTSTR) &lpMsgBuf,
			0,
			NULL
		);
		Sys_Error( "Sys_DLL_Unload: FreeLibrary failed - %s (%d)", lpMsgBuf, lastError );
	}
}

/*
================
Sys_AlreadyRunning

returns true if there is a copy of D3 running already
================
*/
bool Sys_AlreadyRunning( void ) {
#ifndef DEBUG
	if ( !win32.win_allowMultipleInstances.GetBool() ) {
		HANDLE hMutexOneInstance = ::CreateMutex( NULL, FALSE, "DOOM3" );
		if ( ::GetLastError() == ERROR_ALREADY_EXISTS || ::GetLastError() == ERROR_ACCESS_DENIED ) {
			return true;
		}
	}
#endif
	return false;
}

/*
================
Sys_Init

The cvar system must already be setup
================
*/
void Sys_Init( void ) {

	CoInitialize( NULL );

	// make sure the timer is high precision, otherwise
	// NT gets 18ms resolution
	timeBeginPeriod( 1 );

	// get WM_TIMER messages pumped every millisecond
//	SetTimer( NULL, 0, 100, NULL );

#ifdef DEBUG
	cmdSystem->AddCommand( "createResourceIDs", CreateResourceIDs_f, CMD_FL_TOOL, "assigns resource IDs in _resouce.h files" );
#endif
#if 0
	cmdSystem->AddCommand( "setAsyncSound", Sys_SetAsyncSound_f, CMD_FL_SYSTEM, "set the async sound option" );
#endif

	//
	// Windows version
	//
	win32.osversion.dwOSVersionInfoSize = sizeof( win32.osversion );

	if ( !GetVersionEx( (LPOSVERSIONINFO)&win32.osversion ) )
		Sys_Error( "Couldn't get OS info" );

	if ( win32.osversion.dwMajorVersion < 4 ) {
		Sys_Error( GAME_NAME " requires Windows version 4 (NT) or greater" );
	}
	if ( win32.osversion.dwPlatformId == VER_PLATFORM_WIN32s ) {
		Sys_Error( GAME_NAME " doesn't run on Win32s" );
	}

	common->Printf( "%d MB System Memory\n", Sys_GetSystemRam() );
	common->Printf( "%d MB Video Memory\n", Sys_GetVideoRam() );
}

/*
================
Sys_Shutdown
================
*/
void Sys_Shutdown( void ) {
	CoUninitialize();
}

//=======================================================================

//#define SET_THREAD_AFFINITY


/*
====================
Win_Frame
====================
*/
void Win_Frame( void ) {
	// if "viewlog" has been modified, show or hide the log console
	if ( win32.win_viewlog.IsModified() ) {
		if ( !com_skipRenderer.GetBool() && idAsyncNetwork::serverDedicated.GetInteger() != 1 ) {
			Sys_ShowConsole( win32.win_viewlog.GetInteger(), false );
		}
		win32.win_viewlog.ClearModified();
	}
}

int Sys_FPU_PrintStateFlags( char *ptr, int ctrl, int stat, int tags, int inof, int inse, int opof, int opse );

#define TEST_FPU_EXCEPTIONS	/*	FPU_EXCEPTION_INVALID_OPERATION |		*/	\
							/*	FPU_EXCEPTION_DENORMALIZED_OPERAND |	*/	\
							/*	FPU_EXCEPTION_DIVIDE_BY_ZERO |			*/	\
							/*	FPU_EXCEPTION_NUMERIC_OVERFLOW |		*/	\
							/*	FPU_EXCEPTION_NUMERIC_UNDERFLOW |		*/	\
							/*	FPU_EXCEPTION_INEXACT_RESULT |			*/	\
								0

/*
==================
WinMain
==================
*/
int main(int argc, char *argv[]) {
	const HCURSOR hcurSave = ::SetCursor( LoadCursor( 0, IDC_WAIT ) );

	Sys_SetPhysicalWorkMemory( 192 << 20, 1024 << 20 );

	Sys_GetCurrentMemoryStatus( exeLaunchMemoryStats );

	win32.hInstance = GetModuleHandle(NULL);

	// done before Com/Sys_Init since we need this for error output
	Sys_CreateConsole();

	// no abort/retry/fail errors
	SetErrorMode( SEM_FAILCRITICALERRORS );

#ifdef DEBUG
	// disable the painfully slow MS heap check every 1024 allocs
	_CrtSetDbgFlag( 0 );
#endif

//	Sys_FPU_EnableExceptions( TEST_FPU_EXCEPTIONS );
	Sys_FPU_SetPrecision( FPU_PRECISION_DOUBLE_EXTENDED );

	if ( argc > 1 ) {
		common->Init( argc-1, &argv[1] );
	} else {
		common->Init( 0, NULL );
	}

#if TEST_FPU_EXCEPTIONS != 0
	common->Printf( Sys_FPU_GetState() );
#endif

	// hide or show the early console as necessary
	if ( win32.win_viewlog.GetInteger() || com_skipRenderer.GetBool() || idAsyncNetwork::serverDedicated.GetInteger() ) {
		Sys_ShowConsole( 1, true );
	} else {
		Sys_ShowConsole( 0, false );
	}

#ifdef SET_THREAD_AFFINITY
	// give the main thread an affinity for the first cpu
	SetThreadAffinityMask( GetCurrentThread(), 1 );
#endif

	::SetCursor( hcurSave );

	// Launch the script debugger
	if ( strstr( GetCommandLine(), "+debugger" ) ) {
		// DebuggerClientInit( lpCmdLine );
		return 0;
	}

	::SetFocus( win32.hWnd );

	// main game loop
	while( 1 ) {

		Win_Frame();

		// set exceptions, even if some crappy syscall changes them!
		Sys_FPU_EnableExceptions( TEST_FPU_EXCEPTIONS );

#ifdef ID_ALLOW_TOOLS
		if ( com_editors ) {
			if ( com_editors & EDITOR_GUI ) {
				// GUI editor
				GUIEditorRun();
			} else if ( com_editors & EDITOR_RADIANT ) {
				// Level Editor
				RadiantRun();
			}
			else if (com_editors & EDITOR_MATERIAL ) {
				//BSM Nerve: Add support for the material editor
				MaterialEditorRun();
			}
			else {
				if ( com_editors & EDITOR_LIGHT ) {
					// in-game Light Editor
					LightEditorRun();
				}
				if ( com_editors & EDITOR_SOUND ) {
					// in-game Sound Editor
					SoundEditorRun();
				}
				if ( com_editors & EDITOR_DECL ) {
					// in-game Declaration Browser
					DeclBrowserRun();
				}
				if ( com_editors & EDITOR_AF ) {
					// in-game Articulated Figure Editor
					AFEditorRun();
				}
				if ( com_editors & EDITOR_PARTICLE ) {
					// in-game Particle Editor
					ParticleEditorRun();
				}
				if ( com_editors & EDITOR_SCRIPT ) {
					// in-game Script Editor
					ScriptEditorRun();
				}
				if ( com_editors & EDITOR_PDA ) {
					// in-game PDA Editor
					PDAEditorRun();
				}
			}
		}
#endif
		// run the game
		common->Frame();
	}

	// never gets here
	return 0;
}

/*
==================
idSysLocal::OpenURL
==================
*/
void idSysLocal::OpenURL( const char *url, bool doexit ) {
	static bool doexit_spamguard = false;
	HWND wnd;

	if (doexit_spamguard) {
		common->DPrintf( "OpenURL: already in an exit sequence, ignoring %s\n", url );
		return;
	}

	common->Printf("Open URL: %s\n", url);

	if ( !ShellExecute( NULL, "open", url, NULL, NULL, SW_RESTORE ) ) {
		common->Error( "Could not open url: '%s' ", url );
		return;
	}

	wnd = GetForegroundWindow();
	if ( wnd ) {
		ShowWindow( wnd, SW_MAXIMIZE );
	}

	if ( doexit ) {
		doexit_spamguard = true;
		cmdSystem->BufferCommandText( CMD_EXEC_APPEND, "quit\n" );
	}
}

/*
==================
idSysLocal::StartProcess
==================
*/
void idSysLocal::StartProcess( const char *exePath, bool doexit ) {
	TCHAR				szPathOrig[_MAX_PATH];
	STARTUPINFO			si;
	PROCESS_INFORMATION	pi;

	ZeroMemory( &si, sizeof(si) );
	si.cb = sizeof(si);

	strncpy( szPathOrig, exePath, _MAX_PATH );

	if( !CreateProcess( NULL, szPathOrig, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ) ) {
		common->Error( "Could not start process: '%s' ", szPathOrig );
	    return;
	}

	if ( doexit ) {
		cmdSystem->BufferCommandText( CMD_EXEC_APPEND, "quit\n" );
	}
}

/*
==================
Sys_SetFatalError
==================
*/
void Sys_SetFatalError( const char *error ) {
}