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

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.

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

#if defined( ID_ALLOW_TOOLS )
#include "tools/edit_gui_common.h"
#include "../../sys/win32/rc/debugger_resource.h"
#include "DebuggerApp.h"
#else
#include "debugger_common.h"
#endif

#include "DebuggerServer.h"

#if defined( ID_ALLOW_TOOLS )
rvDebuggerApp					gDebuggerApp; // this is also used in other source files
static HWND						gDebuggerWindow = NULL;
#endif

static rvDebuggerServer*		gDebuggerServer			= NULL;
static SDL_Thread*				gDebuggerServerThread   = NULL;
static bool						gDebuggerServerQuit     = false;

#if defined( ID_ALLOW_TOOLS )
/*
================
DebuggerMain

Main entry point for the debugger application
================
*/
void DebuggerClientInit( const char *cmdline )
{
	// See if the debugger is already running
	if ( rvDebuggerWindow::Activate ( ) )
	{
		goto DebuggerClientInitDone;
	}

	if ( !gDebuggerApp.Initialize ( win32.hInstance ) )
	{
		goto DebuggerClientInitDone;
	}
	
	// hide the doom window by default
	::ShowWindow( win32.hWnd, SW_HIDE );

	gDebuggerApp.Run ( );

DebuggerClientInitDone:

	common->Quit();
}

/*
================
DebuggerLaunch

Launches another instance of the running executable with +debugger appended
to the end to indicate that the debugger should start up.
================
*/
void DebuggerClientLaunch ( void )
{
	if ( renderSystem->IsFullScreen() ) {
		common->Printf( "Cannot run the script debugger in fullscreen mode.\n"
					"Set r_fullscreen to 0 and vid_restart.\n" );
		return;
	}

	// See if the debugger is already running
	if ( rvDebuggerWindow::Activate ( ) ) {
		return;
	}

	char exeFile[MAX_PATH];
	char curDir[MAX_PATH];

	STARTUPINFO			startup;
	PROCESS_INFORMATION	process;

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

	GetCurrentDirectory ( MAX_PATH, curDir );

	GetModuleFileName ( NULL, exeFile, MAX_PATH );
	const char* s = va("%s +set fs_game %s +set fs_cdpath %s +debugger", exeFile, cvarSystem->GetCVarString( "fs_game" ), cvarSystem->GetCVarString( "fs_cdpath" ) );
	CreateProcess ( NULL, (LPSTR)s,
					NULL, NULL, FALSE, 0, NULL, curDir, &startup, &process );

	CloseHandle ( process.hThread );
	CloseHandle ( process.hProcess );
}
#endif // #if defined( ID_ALLOW_TOOLS )

/*
================
DebuggerServerThread

Thread proc for the debugger server
================
*/
static int SDLCALL DebuggerServerThread ( void *param )
{
	assert ( gDebuggerServer );

	while ( !gDebuggerServerQuit )
	{
		gDebuggerServer->ProcessMessages ( );
		SDL_Delay( 1 );
	}

	return 0;
}

/*
================
DebuggerServerInit

Starts up the debugger server
================
*/
bool DebuggerServerInit ( void )
{
	com_enableDebuggerServer.ClearModified( );

	if ( !com_debuggerSupported )
	{
		common->Warning( "Called DebuggerServerInit() without the gameDLL supporting it!\n" );
		return false;
	}

	// Dont do this if we are in the debugger already
	if ( gDebuggerServer != NULL 
		|| ( com_editors & EDITOR_DEBUGGER ) )
	{
		return false;
	}

	// Allocate the new debugger server
	gDebuggerServer = new rvDebuggerServer;
	if ( !gDebuggerServer )
	{
		return false;
	}

	// Initialize the debugger server
	if ( !gDebuggerServer->Initialize ( ) )
	{
		delete gDebuggerServer;
		gDebuggerServer = NULL;
		return false;
	}
	
	// Start the debugger server thread
#if SDL_VERSION_ATLEAST(2, 0, 0)
	gDebuggerServerThread = SDL_CreateThread( DebuggerServerThread, "DebuggerServer", NULL );
#else // SDL 1.2
	gDebuggerServerThread = SDL_CreateThread( DebuggerServerThread, NULL );
#endif

	return true;
}

/*
================
DebuggerServerShutdown

Shuts down the debugger server
================
*/
void DebuggerServerShutdown ( void )
{
	if ( gDebuggerServerThread != NULL )
	{
		// Signal the debugger server to quit
		gDebuggerServerQuit = true;

		// Wait for the thread to finish
		SDL_WaitThread( gDebuggerServerThread, NULL );
		gDebuggerServerThread = NULL;

		// Shutdown the server now
		gDebuggerServer->Shutdown();

		delete gDebuggerServer;
		gDebuggerServer = NULL;

		com_editors &= ~EDITOR_DEBUGGER;
	}

	com_enableDebuggerServer.ClearModified( );
}

/*
================
DebuggerServerCheckBreakpoint

Check to see if there is a breakpoint associtated with this statement
================
*/
void DebuggerServerCheckBreakpoint ( idInterpreter* interpreter, idProgram* program, int instructionPointer )
{
	if ( !gDebuggerServer )
	{
		return;
	}

	gDebuggerServer->CheckBreakpoints ( interpreter, program, instructionPointer );
}

/*
================
DebuggerServerPrint

Sends a print message to the debugger client
================
*/
void DebuggerServerPrint ( const char* text )
{
	if ( !gDebuggerServer )
	{
		return;
	}

	gDebuggerServer->Print ( text );
}