#include <libc.h>
#import <AppKit/AppKit.h>
#include "../qcommon/qcommon.h"

int		curtime;
int		sys_frame_time;

void	Sys_UnloadGame (void)
{
}

void *GetGameAPI (void *import);

void	*Sys_GetGameAPI (void *parms)
{
	// we are hard-linked in, so no need to load anything
    return GetGameAPI (parms);
}

void Sys_CopyProtect (void)
{
}

char *Sys_GetClipboardData( void )
{
    return NULL;
}


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

int		hunkcount;

byte	*membase;
int		hunkmaxsize;
int		cursize;

//#define	VIRTUAL_ALLOC

void *Hunk_Begin (int maxsize)
{
    // reserve a huge chunk of memory, but don't commit any yet
    cursize = 0;
    hunkmaxsize = maxsize;
#ifdef VIRTUAL_ALLOC
    membase = VirtualAlloc (NULL, maxsize, MEM_RESERVE, PAGE_NOACCESS);
#else
    membase = malloc (maxsize);
    memset (membase, 0, maxsize);
#endif
    if (!membase)
        Sys_Error ("VirtualAlloc reserve failed");
    return (void *)membase;
}

void *Hunk_Alloc (int size)
{
    void	*buf;

    // round to cacheline
    size = (size+31)&~31;

#ifdef VIRTUAL_ALLOC
    // commit pages as needed
//	buf = VirtualAlloc (membase+cursize, size, MEM_COMMIT, PAGE_READWRITE);
    buf = VirtualAlloc (membase, cursize+size, MEM_COMMIT, PAGE_READWRITE);
    if (!buf)
    {
        FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &buf, 0, NULL);
        Sys_Error ("VirtualAlloc commit failed.\n%s", buf);
    }
#endif
    cursize += size;
    if (cursize > hunkmaxsize)
        Sys_Error ("Hunk_Alloc overflow");

    return (void *)(membase+cursize-size);
}

int Hunk_End (void)
{

    // free the remaining unused virtual memory
#if 0
    void	*buf;

    // write protect it
    buf = VirtualAlloc (membase, cursize, MEM_COMMIT, PAGE_READONLY);
    if (!buf)
        Sys_Error ("VirtualAlloc commit failed");
#endif

    hunkcount++;
//Com_Printf ("hunkcount: %i\n", hunkcount);
    return cursize;
}

void Hunk_Free (void *base)
{
    if ( base )
#ifdef VIRTUAL_ALLOC
        VirtualFree (base, 0, MEM_RELEASE);
#else
        free (base);
#endif

    hunkcount--;
}


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


void Sys_Mkdir (char *path)
{
	if (mkdir (path, 0777) != -1)
		return;
	if (errno != EEXIST)
		Com_Error (ERR_FATAL, "mkdir %s: %s",path, strerror(errno)); 
}

char	*Sys_FindFirst (char *path, unsigned musthave, unsigned canthave)
{
    return NULL;
}

char	*Sys_FindNext (unsigned musthave, unsigned canthave)
{
    return NULL;
}

void	Sys_FindClose (void)
{
}

/*
================
Sys_Milliseconds
================
*/
int Sys_Milliseconds (void)
{
	struct timeval tp;
	struct timezone tzp;
	static int		secbase;

	gettimeofday(&tp, &tzp);
	
	if (!secbase)
	{
		secbase = tp.tv_sec;
		return tp.tv_usec/1000;
	}
	
    curtime = (tp.tv_sec - secbase)*1000 + tp.tv_usec/1000;

    return curtime;
}

/*
================
Sys_Error
================
*/
void Sys_Error (char *error, ...)
{
	va_list		argptr;
	char		string[1024];
	
// change stdin to non blocking
	fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);

	va_start (argptr,error);
	vsprintf (string,error,argptr);
	va_end (argptr);
	printf ("Fatal error: %s\n",string);
	
	if (!NSApp)
	{	// appkit isn't running, so don't try to pop up a panel
		exit (1);
	}
        NSRunAlertPanel (@"Fatal error",[NSString stringWithCString: string]
                         ,@"exit",NULL,NULL);
	[NSApp terminate: NULL];
        exit(1);
}

/*
================
Sys_Printf
================
*/
void	Sys_ConsoleOutput (char *text)
{
	char		*t_p;
	int			l, r;
	
	l = strlen(text);
	t_p = text;
	
// make sure everything goes through, even though we are non-blocking
	while (l)
	{
		r = write (1, text, l);
		if (r != l)
			sleep (0);
		if (r > 0)
		{
			t_p += r;
			l -= r;
		}
	}
}

/*
================
Sys_Quit
================
*/
void Sys_Quit (void)
{
// change stdin to blocking
	fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~FNDELAY);

	if (!NSApp)
		exit (0);		// appkit isn't running

        [NSApp terminate:nil];
}


/*
================
Sys_Init
================
*/
void Sys_Init(void)
{
    moncontrol(0);	// turn off profiling except during real Quake work

// change stdin to non blocking
     fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) | FNDELAY);	
}


extern	NSWindow	*vid_window_i;

void Sys_AppActivate (void)
{
    [vid_window_i makeKeyAndOrderFront: nil];
}


/*
================
Sys_SendKeyEvents

service any pending appkit events
================
*/
void Sys_SendKeyEvents (void)
{
	NSEvent	*event;
	NSDate	*date;

	date = [NSDate date];
	do
	{
		event = [NSApp
            nextEventMatchingMask: 	0xffffffff
            untilDate:		date
            inMode:			@"NSDefaultRunLoopMode"
            dequeue:		YES];
		if (event)
			[NSApp	sendEvent: event];
	} while (event);

    // grab frame time 
    sys_frame_time = Sys_Milliseconds();
}


/*
================
Sys_ConsoleInput

Checks for a complete line of text typed in at the console, then forwards
it to the host command processor
================
*/
char *Sys_ConsoleInput (void)
{
	static char	text[256];
	int		len;

	len = read (0, text, sizeof(text));
	if (len < 1)
		return NULL;
	text[len-1] = 0;	// rip off the /n and terminate
	
	return text;
}


/*
=============
main
=============
*/
void main (int argc, char **argv)
{
    int		frame;
    NSAutoreleasePool *pool;
	int		oldtime, t;
        
    pool = [[NSAutoreleasePool alloc] init];
        
    Qcommon_Init (argc, argv);

    [pool release];

    oldtime = Sys_Milliseconds ();
    while (1)
    {
        pool =[[NSAutoreleasePool alloc] init];

        if (++frame > 10)
            moncontrol(1);// profile only while we do each Quake frame

		t = Sys_Milliseconds ();
        Qcommon_Frame (t - oldtime);
		oldtime = t;
        moncontrol(0);

        [pool release];
    }
}