/*
 * "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
 * Ken Silverman's official web site: "http://www.advsys.net/ken"
 * See the included license file "BUILDLIC.TXT" for license info.
 * This file has been modified from Ken Silverman's original release
 */

#if PLATFORM_DOS
#include <io.h>
#endif

#include <fcntl.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <memory.h>
#include <stdlib.h>
#include "engine.h"
#include "platform.h"
#include "build.h"
#include "pragmas.h"
#include "names.h"
#include "bstub.h"
#include "cache1d.h"  /* rcg05232001 need groupfile support. */
#include "display.h"  /* rcg05232001 need some "vesa" routines. */

/* !!! temporary externs. */
extern long total_rendered_frames, total_render_time;

extern char keystatus[256];

static char tempbuf[256];
extern long qsetmode;
extern short searchsector, searchwall, searchstat;
extern long zmode, kensplayerheight;
extern short defaultspritecstat;

extern short temppicnum, tempcstat, templotag, temphitag, tempextra;
extern char tempshade, temppal, tempxrepeat, tempyrepeat;
extern char somethingintab;

#define NUMOPTIONS 8
#define NUMKEYS 19
static long vesares[13][2] = {
	{320,200},{360,200},{320,240},{360,240},{320,400},
	{360,400},{640,350},{640,400},{640,480},{800,600},
	{1024,768},{1280,1024},{1600,1200}
};

static char option[NUMOPTIONS] = {0,0,0,0,0,0,1,0};
static char keys[NUMKEYS] =
{
	0xc8,0xd0,0xcb,0xcd,0x2a,0x9d,0x1d,0x39,
	0x1e,0x2c,0xd1,0xc9,0x33,0x34,
	0x9c,0x1c,0xd,0xc,0xf,
};

extern char buildkeys[NUMKEYS];

extern long frameplace, xdimenscale, ydimen;
extern long posx, posy, posz, horiz;
extern short ang, cursectnum;

static long hang = 0;

extern long stretchhline(long,long,long,long,long,long);

#ifdef PLATFORM_DOS
#pragma aux stretchhline parm [eax][ebx][ecx][edx][esi][edi];
#endif

#ifdef PLATFORM_DOS
extern void printext16(long xpos, long ypos, short col, short backcol,
			char name[82], char fontsize);
#define statusbar_printext16 printext16
#define statusbar_printext16_noupdate printext16
#else
extern void statusbar_printext16(long xpos, long ypos, short col, short backcol, char name[82], char fontsize);
#endif

/*
 * Detecting 2D / 3D mode:
 *    qsetmode is 200 in 3D mode
 *    qsetmode is 350/480 in 2D mode
 * 
 * You can read these variables when F5-F8 is pressed in 3D mode only:
 * 
 *    If (searchstat == 0)  WALL        searchsector=sector, searchwall=wall
 *    If (searchstat == 1)  CEILING     searchsector=sector
 *    If (searchstat == 2)  FLOOR       searchsector=sector
 *    If (searchstat == 3)  SPRITE      searchsector=sector, searchwall=sprite
 *    If (searchstat == 4)  MASKED WALL searchsector=sector, searchwall=wall
 * 
 *    searchsector is the sector of the selected item for all 5 searchstat's
 * 
 *    searchwall is undefined if searchstat is 1 or 2
 *    searchwall is the wall if searchstat = 0 or 4
 *    searchwall is the sprite if searchstat = 3 (Yeah, I know - it says wall,
 *                                       but trust me, it's the sprite number)
 */

long ofinetotalclock, ototalclock, averagefps;
#define AVERAGEFRAMES 32
static long frameval[AVERAGEFRAMES], framecnt = 0;

#ifdef PLATFORM_DOS

void inittimer42(void);
#pragma aux inittimer42 =\
	"in al, 0x61",\
	"or al, 1",\
	"out 0x61, al",\
	"mov al, 0xb4",\
	"out 0x43, al",\
	"xor al, al",\
	"out 0x42, al",\
	"out 0x42, al",\
	modify exact [eax]\


void uninittimer42(void);
#pragma aux uninittimer42 =\
	"in al, 0x61",\
	"and al, 252",\
	"out 0x61, al",\
	modify exact [eax]\


long gettimer42(void);
#pragma aux gettimer42 =\
	"mov al, 0x84",\
	"out 0x43, al",\
	"in al, 0x42",\
	"shl eax, 24",\
	"in al, 0x42",\
	"rol eax, 8",\
	modify [eax]
#else
  void inittimer42(void) {}
  void uninittimer42(void) {}
  int gettimer42(void) { return(0); }
#endif


/* rcg05232001 These are defined in build.c ... */
void editinput(void);
void clearmidstatbar16(void);
short getnumber16(char namestart[80], short num, long maxnumber);
void printmessage16(char name[82]);


/* rcg05232001 much thanks to TerminX (Mapster) for the lookup.dat info! */
static int use_palette_lookup_file(const char *lookup_file)
{
    int retval = 0;
    unsigned char *tempbuf = NULL;
    unsigned char *ptr = NULL;
    unsigned char num_palettes = 0;
    int i = 0;
    int bytes = 0;

    long in = kopen4load(lookup_file, 0);
    if (in != -1)
    {
        if (kread(in, &num_palettes, 1) == 1)
        {
            bytes = ( ((int) num_palettes) * 257 );
            tempbuf = (unsigned char *) malloc((size_t) bytes);
            if (tempbuf != NULL)
            {
                if (kread(in, tempbuf, bytes) == bytes)
                {
                    for (i = 0, ptr = tempbuf; i < num_palettes; i++)
                    {
                        makepalookup(*ptr, (char *) ptr + 1, 0, 0, 0, 1);
                        ptr += 257;
                    } /* for */
                    retval = 1;  /* success. */
                } /* if */
                free(tempbuf);
            } /* if */
        } /* if */
        kclose(in);
    } /* if */

    return(retval);
} /* use_lookup_dat */


void ExtInit(void)
{
	long i, fil;
    const char *grpname = getenv("BUILD_GROUPFILE");

	/*
    printf("------------------------------------------------------------------------------\n");
	printf("   BUILD.EXE copyright(c) 1996 by Ken Silverman.  You are granted the\n");
	printf("   right to use this software for your personal use only.  This is a\n");
	printf("   special version to be used with \"Happy Fun KenBuild\" and may not work\n");
	printf("   properly with other Build engine games.  Please refer to license.doc\n");
	printf("   for distribution rights\n");
	printf("------------------------------------------------------------------------------\n");
	getchar();
	*/

        /* Now we check for an envr variable first, for Duke/SW/etc groups. */
    if (grpname == NULL)
        grpname = "stuff.dat";

        /* rcg08122000 panic if groupfile is missing. */
	if (initgroupfile(grpname) < 0)
    {
        fprintf(stderr, "BUILDGRP: Cannot open \"%s\"! Aborting...\n", grpname);
        exit(55);
    } /* if */

	if ((fil = open("setup.dat",O_BINARY|O_RDWR,S_IREAD)) != -1)
	{
		read(fil,&option[0],NUMOPTIONS);
		read(fil,&keys[0],NUMKEYS);
		memcpy((void *)buildkeys,(void *)keys,NUMKEYS);   /* Trick to make build use setup.dat keys */
		close(fil);
	}
	if (option[4] > 0) option[4] = 0;
	initmouse();
	initengine();
	vidoption = option[0]; xdim = vesares[option[6]&15][0]; ydim = vesares[option[6]&15][1];

		/*
         * You can load your own palette lookup tables here if you just
		 * copy the right code! (sez Ken).
         *
         * We try to use a Duke3D lookup.dat first. If that fails, then
         *  we revert to KenBuild's original method.  (sez Ryan).
         */
    if (!use_palette_lookup_file("lookup.dat"))
    {
    	for(i=0;i<256;i++)
    		tempbuf[i] = ((i+32)&255);  /* remap colors for screwy palette sectors */
    	makepalookup(16,tempbuf,0,0,0,1);
    } /* if */

	kensplayerheight = 32;
	zmode = 0;
	defaultspritecstat = 0;
	pskyoff[0] = 0; pskyoff[1] = 0; pskybits = 1;
}

void ExtUnInit(void)
{
	uninittimer42();
	uninitgroupfile();
}

static long daviewingrange, daaspect, horizval1, horizval2;
void ExtPreCheckKeys(void)
{
	long cosang, sinang, dx, dy, mindx, i;

	if (keystatus[0x3e])  /* F4 - screen re-size */
	{
		keystatus[0x3e] = 0;

			/* cycle through all vesa modes, then screen-buffer mode */
		getvalidvesamodes();
		if (vidoption == 1)
		{
			for(i=0;i<validmodecnt;i++)
				if ((validmodexdim[i] == xdim) && (validmodeydim[i] == ydim))
				{
					if (i == validmodecnt-1)
						setgamemode(2,320L,200L);
					else
						setgamemode(1,validmodexdim[i+1],validmodeydim[i+1]);
					break;
				}
		}
		else if (validmodecnt > 0)
			setgamemode(1,validmodexdim[0],validmodeydim[0]);

		inittimer42();  /* Must init here because VESA 0x4F02 messes timer 2 */
	}

	if (keystatus[0x2a]|keystatus[0x36])
	{
		if (keystatus[0xcf]) hang = max(hang-1,-182);
		if (keystatus[0xc7]) hang = min(hang+1,182);
	}
	else
	{
		if (keystatus[0xcf]) hang = max(hang-8,-182);
		if (keystatus[0xc7]) hang = min(hang+8,182);
	}
	if (keystatus[0x4c]) { hang = 0; horiz = 100; }
	if (hang != 0)
	{
		walock[4094] = 255;
		if (waloff[4094] == 0) allocache(&waloff[4094],240L*384L,(unsigned char *) &walock[4094]);
		setviewtotile(4094,240L,384L);

		cosang = sintable[(hang+512)&2047];
		sinang = sintable[hang&2047];

		dx = dmulscale1(320,cosang,200,sinang); mindx = dx;
		dy = dmulscale1(-200,cosang,320,sinang);
		horizval1 = dy*(320>>1)/dx-1;

		dx = dmulscale1(320,cosang,-200,sinang); mindx = min(dx,mindx);
		dy = dmulscale1(200,cosang,320,sinang);
		horizval2 = dy*(320>>1)/dx+1;

		daviewingrange = scale(65536,16384*(xdim>>1),mindx-16);
		daaspect = scale(daviewingrange,scale(320,tilesizx[4094],tilesizy[4094]),horizval2+6-horizval1);
		setaspect(daviewingrange,scale(daaspect,ydim*320,xdim*200));
		horiz = 100-divscale15(horizval1+horizval2,daviewingrange);
	}
}

#define MAXVOXMIPS 5
extern char *voxoff[][MAXVOXMIPS];
void ExtAnalyzeSprites(void)
{
	long i, *longptr;
	spritetype *tspr;

	for(i=0,tspr=&tsprite[0];i<spritesortcnt;i++,tspr++)
	{
		switch(tspr->picnum)
		{
			case PLAYER:
				if (!voxoff[0][0]) qloadkvx(0L,"voxel000.kvx");
				tspr->cstat |= 48;
				longptr = (long *)voxoff[0][0];
				tspr->xrepeat = scale(tspr->xrepeat,56,longptr[2]);
				tspr->yrepeat = scale(tspr->yrepeat,56,longptr[2]);
				tspr->picnum = 0;
				tspr->shade -= 6;
				break;
			case BROWNMONSTER:
				if (!voxoff[1][0]) qloadkvx(1L,"voxel001.kvx");
				tspr->cstat |= 48;
				tspr->picnum = 1;
				break;
		}

		tspr->shade += 6;
		if (sector[tspr->sectnum].ceilingstat&1)
			tspr->shade += sector[tspr->sectnum].ceilingshade;
		else
			tspr->shade += sector[tspr->sectnum].floorshade;
	}
}

static char timerinited = 0;
void ExtCheckKeys(void)
{
	long i, j, p, y, dx, dy, cosang, sinang, bufplc, tsizy, tsizyup15;

	if (qsetmode == 200)    /* In 3D mode */
	{
		if (hang != 0)
		{
			bufplc = waloff[4094]+(mulscale16(horiz-100,xdimenscale)+(tilesizx[4094]>>1))*tilesizy[4094];
			setviewback();
			cosang = sintable[(hang+512)&2047];
			sinang = sintable[hang&2047];
			dx = dmulscale1(xdim,cosang,ydim,sinang);
			dy = dmulscale1(-ydim,cosang,xdim,sinang);

			tsizy = tilesizy[4094];
			tsizyup15 = (tsizy<<15);
			dx = mulscale14(dx,daviewingrange);
			dy = mulscale14(dy,daaspect);
			sinang = mulscale14(sinang,daviewingrange);
			cosang = mulscale14(cosang,daaspect);
			p = ylookup[windowy1]+frameplace+windowx2+1;
			for(y=windowy1;y<=windowy2;y++)
			{
				i = divscale16(tsizyup15,dx);
				stretchhline(0,(xdim>>1)*i+tsizyup15,xdim>>2,i,mulscale32(i,dy)*tsizy+bufplc,p);
				dx -= sinang; dy += cosang; p += ylookup[1];
			}
			walock[4094] = 1;

			sprintf(tempbuf,"%ld",(hang*180)>>10);
    		printext256(0L,8L,31,-1,tempbuf,1);
		}

		if (keystatus[0xa]) setaspect(viewingrange+(viewingrange>>8),yxaspect+(yxaspect>>8));
		if (keystatus[0xb]) setaspect(viewingrange-(viewingrange>>8),yxaspect-(yxaspect>>8));
		if (keystatus[0xc]) setaspect(viewingrange,yxaspect-(yxaspect>>8));
		if (keystatus[0xd]) setaspect(viewingrange,yxaspect+(yxaspect>>8));

		if (!timerinited)
		{
			timerinited = 1;
			inittimer42();  /* Must init here because VESA 0x4F02 messes timer 2 */
		}
		i = totalclock-ototalclock; ototalclock += i;
		j = ofinetotalclock-gettimer42(); ofinetotalclock -= j;
		i = ((i*(1193181/120)-(j&65535)+32768)&0xffff0000)+(j&65535);
		if (i) { frameval[framecnt&(AVERAGEFRAMES-1)] = 11931810/i; framecnt++; }

            /* !!! This ifdef should be temporary!  --ryan.  !!! */
  			/*Print MAX FRAME RATE */
        #ifdef PLATFORM_DOS
    		i = frameval[(framecnt-1)&(AVERAGEFRAMES-1)];
    		for(j=AVERAGEFRAMES-1;j>0;j--) i = max(i,frameval[j]);
    		averagefps = ((averagefps*3+i)>>2);
    		sprintf(tempbuf,"%ld.%ld",averagefps/10,averagefps%10);
        #else
    		sprintf(tempbuf,"%.2f", (double) (total_rendered_frames / ((double) total_render_time / 1000.0)));
        #endif

    	printext256(0L,0L,31,-1,tempbuf,1);

		editinput();
	}
	else
	{
		timerinited = 0;
	}
}

void ExtCleanUp(void)
{
}

void ExtLoadMap(const char *mapname)
{
}

void ExtSaveMap(const char *mapname)
{
}

const char *ExtGetSectorCaption(short sectnum)
{
	if ((sector[sectnum].lotag|sector[sectnum].hitag) == 0)
	{
		tempbuf[0] = 0;
	}
	else
	{
		sprintf(tempbuf,"%hu,%hu",(unsigned short)sector[sectnum].hitag,
										  (unsigned short)sector[sectnum].lotag);
	}
	return(tempbuf);
}

const char *ExtGetWallCaption(short wallnum)
{
	if ((wall[wallnum].lotag|wall[wallnum].hitag) == 0)
	{
		tempbuf[0] = 0;
	}
	else
	{
		sprintf(tempbuf,"%hu,%hu",(unsigned short)wall[wallnum].hitag,
										  (unsigned short)wall[wallnum].lotag);
	}
	return(tempbuf);
}

const char *ExtGetSpriteCaption(short spritenum)
{
	if ((sprite[spritenum].lotag|sprite[spritenum].hitag) == 0)
	{
		tempbuf[0] = 0;
	}
	else
	{
		sprintf(tempbuf,"%hu,%hu",(unsigned short)sprite[spritenum].hitag,
										  (unsigned short)sprite[spritenum].lotag);
	}
	return(tempbuf);
}

/*
 * printext16 parameters:
 * printext16(long xpos, long ypos, short col, short backcol,
 *            char name[82], char fontsize)
 *   xpos 0-639   (top left)
 *   ypos 0-479   (top left)
 *   col 0-15
 *   backcol 0-15, -1 is transparent background
 *   name
 *   fontsize 0=8*8, 1=3*5
 *
 * drawline16 parameters:
 *  drawline16(long x1, long y1, long x2, long y2, char col)
 *   x1, x2  0-639
 *   y1, y2  0-143  (status bar is 144 high, origin is top-left of STATUS BAR)
 *   col     0-15
 */

void ExtShowSectorData(short sectnum)   /* F5 */
{
	if (qsetmode == 200)    /* In 3D mode */
	{
	}
	else
	{
		clearmidstatbar16();             /* Clear middle of status bar */

		sprintf(tempbuf,"Sector %d",sectnum);
		statusbar_printext16(8,32,11,-1,tempbuf,0);

		statusbar_printext16(8,48,11,-1,"8*8 font: ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789",0);
		statusbar_printext16(8,56,11,-1,"3*5 font: ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789",1);

		drawline16(320,68,344,80,4);       /* Draw house */
		drawline16(344,80,344,116,4);
		drawline16(344,116,296,116,4);
		drawline16(296,116,296,80,4);
		drawline16(296,80,320,68,4);
	}
}

void ExtShowWallData(short wallnum)       /* F6 */
{
	if (qsetmode == 200)    /* In 3D mode */
	{
	}
	else
	{
		clearmidstatbar16();             /* Clear middle of status bar */

		sprintf(tempbuf,"Wall %d",wallnum);
		statusbar_printext16(8,32,11,-1,tempbuf,0);
	}
}

void ExtShowSpriteData(short spritenum)   /* F6 */
{
	if (qsetmode == 200)    /* In 3D mode */
	{
	}
	else
	{
		clearmidstatbar16();             /* Clear middle of status bar */

		sprintf(tempbuf,"Sprite %d",spritenum);
		statusbar_printext16(8,32,11,-1,tempbuf,0);
	}
}

void ExtEditSectorData(short sectnum)    /* F7 */
{
	short nickdata;

	if (qsetmode == 200)    /* In 3D mode */
	{
			/* Ceiling */
		if (searchstat == 1)
			sector[searchsector].ceilingpicnum++;   /* Just a stupid example */

			/* Floor */
		if (searchstat == 2)
			sector[searchsector].floorshade++;      /* Just a stupid example */
	}
	else                    /* In 2D mode */
	{
		sprintf(tempbuf,"Sector (%d) Nick's variable: ",sectnum);
		nickdata = 0;
		nickdata = getnumber16(tempbuf,nickdata,65536L);

		printmessage16("");              /* Clear message box (top right of status bar) */
		ExtShowSectorData(sectnum);
	}
}

void ExtEditWallData(short wallnum)       /* F8 */
{
	short nickdata;

	if (qsetmode == 200)    /* In 3D mode */
	{
	}
	else
	{
		sprintf(tempbuf,"Wall (%d) Nick's variable: ",wallnum);
		nickdata = 0;
		nickdata = getnumber16(tempbuf,nickdata,65536L);

		printmessage16("");              /* Clear message box (top right of status bar) */
		ExtShowWallData(wallnum);
	}
}

void ExtEditSpriteData(short spritenum)   /* F8 */
{
	short nickdata;

	if (qsetmode == 200)    /* In 3D mode */
	{
	}
	else
	{
		sprintf(tempbuf,"Sprite (%d) Nick's variable: ",spritenum);
		nickdata = 0;
		nickdata = getnumber16(tempbuf,nickdata,65536L);
		printmessage16("");

		printmessage16("");              /* Clear message box (top right of status bar) */
		ExtShowSpriteData(spritenum);
	}
}

void faketimerhandler(void)
{
}

	/* Just thought you might want my getnumber16 code */

#if 0
int getnumber16(char namestart[80], short num, long maxnumber)
{
	char buffer[80];
	long j, k, n, danum, oldnum;

	danum = (long)num;
	oldnum = danum;
	while ((keystatus[0x1c] != 2) && (keystatus[0x1] == 0))  /* Enter, ESC */
	{
		sprintf(&buffer,"%s%ld_ ",namestart,danum);
		printmessage16(buffer);

		for(j=2;j<=11;j++)                /* Scan numbers 0-9 */
			if (keystatus[j] > 0)
			{
				keystatus[j] = 0;
				k = j-1;
				if (k == 10) k = 0;
				n = (danum*10)+k;
				if (n < maxnumber) danum = n;
			}
		if (keystatus[0xe] > 0)    /* backspace */
		{
			danum /= 10;
			keystatus[0xe] = 0;
		}
		if (keystatus[0x1c] == 1)   /* L. enter */
		{
			oldnum = danum;
			keystatus[0x1c] = 2;
			asksave = 1;
		}
	}
	keystatus[0x1c] = 0;
	keystatus[0x1] = 0;
	return((short)oldnum);
}
#endif


/* end of bstub.c ... */