/*	diag.c		Larn is copyrighted 1986 by Noah Morgan. */
/* $FreeBSD: src/games/larn/diag.c,v 1.5 1999/11/16 02:57:21 billf Exp $ */
#include <sys/types.h>
#include <sys/times.h>
#include <sys/stat.h>
#include "header.h"
extern int rmst, maxitm, lasttime;

static void greedy(void);
static void fsorry(void);
static void fcheat(void);

static struct tms cputime;

/*
	***************************
	DIAG -- dungeon diagnostics
	***************************

	subroutine to print out data for debugging
 */
#ifdef EXTRA
static int dcount(int);
static void drawdiagscreen(void);

static int rndcount[16];

int
diag(void)
{
	int i, j;
	int hit, dam;
	cursors();
	lwclose();
	if (lcreat(diagfile) < 0) {	/* open the diagnostic file */
		lcreat(NULL);
		lprcat("\ndiagnostic failure\n");
		return (-1);
	}

	write(1, "\nDiagnosing . . .\n", 18);
	lprcat("\n\nBeginning of DIAG diagnostics ----------\n");

/* for the character attributes */

	lprintf("\n\nPlayer attributes:\n\nHit points: %2d(%2d)", (long)c[HP], (long)c[HPMAX]);
	lprintf("\ngold: %d  Experience: %d  Character level: %d  Level in caverns: %d",
	    (long)c[GOLD], (long)c[EXPERIENCE], (long)c[LEVEL], (long)level);
	lprintf("\nTotal types of monsters: %d", (long)MAXMONST + 8);

	lprcat("\f\nHere's the dungeon:\n\n");

	i = level;
	for (j = 0; j < MAXLEVEL + MAXVLEVEL; j++) {
		newcavelevel(j);
		lprintf("\nMaze for level %s:\n", levelname[level]);
		diagdrawscreen();
	}
	newcavelevel(i);

	lprcat("\f\nNow for the monster data:\n\n");
	lprcat("   Monster Name      LEV  AC   DAM  ATT  DEF    GOLD   HP     EXP   \n");
	lprcat("--------------------------------------------------------------------------\n");
	for (i = 0; i <= MAXMONST + 8; i++) {
		lprintf("%19s  %2d  %3d ", monster[i].name, (long)monster[i].level, (long)monster[i].armorclass);
		lprintf(" %3d  %3d  %3d  ", (long)monster[i].damage, (long)monster[i].attack, (long)monster[i].defense);
		lprintf("%6d  %3d   %6d\n", (long)monster[i].gold, (long)monster[i].hitpoints, (long)monster[i].experience);
	}

	lprcat("\n\nHere's a Table for the to hit percentages\n");
	lprcat("\n     We will be assuming that players level = 2 * monster level");
	lprcat("\n     and that the players dexterity and strength are 16.");
	lprcat("\n    to hit: if (rnd(22) < (2[monst AC] + your level + dex + WC/8 -1)/2) then hit");
	lprcat("\n    damage = rund(8) + WC/2 + STR - c[HARDGAME] - 4");
	lprcat("\n    to hit:  if rnd(22) < to hit  then player hits\n");
	lprcat("\n    Each entry is as follows:  to hit / damage / number hits to kill\n");
	lprcat("\n          monster     WC = 4         WC = 20        WC = 40");
	lprcat("\n---------------------------------------------------------------");
	for (i = 0; i <= MAXMONST + 8; i++) {
		hit = 2 * monster[i].armorclass + 2 * monster[i].level + 16;
		dam = 16 - c[HARDGAME];
		lprintf("\n%20s   %2d/%2d/%2d       %2d/%2d/%2d       %2d/%2d/%2d",
			monster[i].name,
			(long)(hit / 2), (long)max(0, dam + 2), (long)(monster[i].hitpoints / (dam + 2) + 1),
			(long)((hit + 2) / 2), (long)max(0, dam + 10), (long)(monster[i].hitpoints / (dam + 10) + 1),
			(long)((hit + 5) / 2), (long)max(0, dam + 20), (long)(monster[i].hitpoints / (dam + 20) + 1));
	}

	lprcat("\n\nHere's the list of available potions:\n\n");
	for (i = 0; i < MAXPOTION; i++)
		lprintf("%20s\n", &potionhide[i][1]);
	lprcat("\n\nHere's the list of available scrolls:\n\n");
	for (i = 0; i < MAXSCROLL; i++)
		lprintf("%20s\n", &scrollhide[i][1]);
	lprcat("\n\nHere's the spell list:\n\n");
	lprcat("spell          name           description\n");
	lprcat("-------------------------------------------------------------------------------------------\n\n");
	for (j = 0; j < SPNUM; j++) {
		lprc(' ');
		lprcat(spelcode[j]);
		lprintf(" %21s  %s\n", spelname[j], speldescript[j]);
	}

	lprcat("\n\nFor the c[] array:\n");
	for (j = 0; j < 100; j += 10) {
		lprintf("\nc[%2d] = ", (long)j);
		for (i = 0; i < 9; i++)
			lprintf("%5d ", (long)c[i + j]);
	}

	lprcat("\n\nTest of random number generator ----------------");
	lprcat("\n    for 25,000 calls divided into 16 slots\n\n");

	for (i = 0; i < 16; i++)
		rndcount[i] = 0;
	for (i = 0; i < 25000; i++)
		rndcount[rund(16)]++;
	for (i = 0; i < 16; i++) {
		lprintf("  %5d", (long)rndcount[i]);
		if (i == 7)
			lprc('\n');
	}

	lprcat("\n\n");
	lwclose();
	lcreat(NULL);
	lprcat("Done Diagnosing . . .");
	return (0);
}
/*
	subroutine to count the number of occurrences of an object
 */
static int
dcount(int l)
{
	int i, j, p;
	int k;
	k = 0;
	for (i = 0; i < MAXX; i++)
		for (j = 0; j < MAXY; j++)
			for (p = 0; p < MAXLEVEL; p++)
				if (cell[p * MAXX * MAXY + i * MAXY + j].item == l)
					k++;
	return (k);
}

/*
	subroutine to draw the whole screen as the player knows it
 */
static void
diagdrawscreen(void)
{
	int i, j, k;

	/* for the east west walls of this line */
	for (i = 0; i < MAXY; i++) {
		for (j = 0; j < MAXX; j++)
			if (k = mitem[j][i])
				lprc(monstnamelist[k]);
			else
				lprc(objnamelist[item[j][i]]);
		lprc('\n');
	}
}
#endif

/*
	to save the game in a file
 */
static time_t zzz = 0;

int
savegame(char *fname)
{
	int i, k;
	struct sphere *sp;
	struct stat statbuf;

	nosignal = 1;
	lflush();
	savelevel();
	ointerest();
	if (lcreat(fname) < 0) {
		lcreat(NULL);
		lprintf("\nCan't open file <%s> to save game\n", fname);
		nosignal = 0;
		return (-1);
	}

	set_score_output();
	lwrite((char *)beenhere, MAXLEVEL + MAXVLEVEL);
	for (k = 0; k < MAXLEVEL + MAXVLEVEL; k++)
		if (beenhere[k])
			lwrite((char *)&cell[k * MAXX * MAXY], sizeof(struct cel) * MAXY * MAXX);
	times(&cputime);	/* get cpu time */
	c[CPUTIME] += (cputime.tms_utime + cputime.tms_stime) / 60;
	lwrite((char *)&c[0], 100 * sizeof(long));
	lprint((long)gtime);
	lprc(level);
	lprc(playerx);
	lprc(playery);
	lwrite((char *)iven, 26);
	lwrite((char *)ivenarg, 26 * sizeof(short));
	for (k = 0; k < MAXSCROLL; k++)
		lprc(scrollname[k][0]);
	for (k = 0; k < MAXPOTION; k++)
		lprc(potionname[k][0]);
	lwrite((char *)spelknow, SPNUM);
	lprc(wizard);
	lprc(rmst);		/* random monster generation counter */
	for (i = 0; i < 90; i++)
		lprc(itm_[i].qty);
	lwrite((char *)course, 25);
	lprc(cheat);
	lprc(VERSION);
	for (i = 0; i < MAXMONST; i++)
		lprc(monster[i].genocided);	/* genocide info */
	/* save spheres of annihilation */
	for (sp = spheres; sp; sp = sp->p)
		lwrite((char *)sp, sizeof(struct sphere));
	time(&zzz);
	lprint((long)(zzz - initialtime));
	lwrite((char *)&zzz, sizeof(long));
	if (fstat(io_outfd, &statbuf) < 0)
		lprint(0L);
	else
		lprint((long)statbuf.st_ino);	/* inode # */
	lwclose();
	lastmonst[0] = 0;
#ifndef VT100
	setscroll();
#endif /* VT100 */
	lcreat(NULL);
	nosignal = 0;
	return (0);
}

void
restoregame(char *fname)
{
	int i, k;
	struct sphere *sp, *sp2;
	struct stat filetimes;
	cursors();
	lprcat("\nRestoring . . .");
	lflush();
	if (lopen(fname) <= 0) {
		lcreat(NULL);
		lprintf("\nCan't open file <%s>to restore game\n", fname);
		nap(2000);
		c[GOLD] = c[BANKACCOUNT] = 0;
		died(-265);
		return;
	}
	lrfill((char *)beenhere, MAXLEVEL + MAXVLEVEL);
	for (k = 0; k < MAXLEVEL + MAXVLEVEL; k++)
		if (beenhere[k])
			lrfill((char *)&cell[k * MAXX * MAXY], sizeof(struct cel) * MAXY * MAXX);

	lrfill((char *)&c[0], 100 * sizeof(long));
	gtime = lrint_x();
	level = c[CAVELEVEL] = lgetc();
	playerx = lgetc();
	playery = lgetc();
	lrfill((char *)iven, 26);
	lrfill((char *)ivenarg, 26 * sizeof(short));
	for (k = 0; k < MAXSCROLL; k++)
		scrollname[k] = lgetc() ? scrollhide[k] : "";
	for (k = 0; k < MAXPOTION; k++)
		potionname[k] = lgetc() ? potionhide[k] : "";
	lrfill((char *)spelknow, SPNUM);
	wizard = lgetc();
	rmst = lgetc();		/* random monster creation flag */

	for (i = 0; i < 90; i++)
		itm_[i].qty = lgetc();
	lrfill((char *)course, 25);
	cheat = lgetc();
	if (VERSION != lgetc()) {	/* version number  */
		cheat = 1;
		lprcat("Sorry, But your save file is for an older version of larn\n");
		nap(2000);
		c[GOLD] = c[BANKACCOUNT] = 0;
		died(-266);
		return;
	}

	for (i = 0; i < MAXMONST; i++)
		monster[i].genocided = lgetc();	/* genocide info */
	for (sp = NULL, i = 0; i < c[SPHCAST]; i++) {
		sp2 = sp;
		sp = malloc(sizeof(struct sphere));
		if (sp == NULL) {
			write(2, "Can't malloc() for sphere space\n", 32);
			break;
		}
		/* get spheres of annihilation */
		lrfill((char *)sp, sizeof(struct sphere));
		sp->p = 0;	/* null out pointer */
		if (i == 0)
			spheres = sp;	/* beginning of list */
		else
			sp2->p = sp;
	}

	time(&zzz);
	initialtime = zzz - lrint_x();
	/* get the creation and modification time of file */
	fstat(io_infd, &filetimes);
	lrfill((char *)&zzz, sizeof(long));
	zzz += 6;
	if (filetimes.st_ctime > zzz)		/* file create time */
		fsorry();
	else if (filetimes.st_mtime > zzz)	/* file modify time */
		fsorry();
	if (c[HP] < 0) {
		died(284);
		return;
	}			/* died a post mortem death */

	oldx = oldy = 0;
	i = lrint_x();		/* inode # */
	if (i && (filetimes.st_ino != (unsigned)i))
		fsorry();
	lrclose();
	if (strcmp(fname, ckpfile) == 0) {
		if (lappend(fname) < 0)
			fcheat();
		else {
			lprc(' ');
			lwclose();
		}
		lcreat(NULL);
	} else if (unlink(fname) < 0)
		fcheat();	/* can't unlink save file */
	/* for the greedy cheater checker */
	for (k = 0; k < 6; k++)
		if (c[k] > 99)
			greedy();
	if (c[HPMAX] > 999 || c[SPELLMAX] > 125)
		greedy();
	/* if patch up lev 25 player */
	if (c[LEVEL] == 25 && c[EXPERIENCE] > skill[24]) {
		long tmp;
		tmp = c[EXPERIENCE] - skill[24];	/* amount to go up */
		c[EXPERIENCE] = skill[24];
		raiseexperience((long)tmp);
	}
	getlevel();
	lasttime = gtime;
}

/*
	subroutine to not allow greedy cheaters
 */
static void
greedy(void)
{
#if WIZID
	if (wizard)
		return;
#endif

	lprcat("\n\nI am so sorry, but your character is a little TOO good!  Since this\n");
	lprcat("cannot normally happen from an honest game, I must assume that you cheated.\n");
	lprcat("In that you are GREEDY as well as a CHEATER, I cannot allow this game\n");
	lprcat("to continue.\n");
	nap(5000);
	c[GOLD] = c[BANKACCOUNT] = 0;
	died(-267);
}

/*
	subroutine to not allow altered save files and terminate the attempted
	restart
 */
static void
fsorry(void)
{
	lprcat("\nSorry, but your savefile has been altered.\n");
	lprcat("However, seeing as I am a good sport, I will let you play.\n");
	lprcat("Be advised though, you won't be placed on the normal scoreboard.");
	cheat = 1;
	nap(4000);
}

/*
	subroutine to not allow game if save file can't be deleted
 */
static void
fcheat(void)
{
#if WIZID
	if (wizard)
		return;
#endif

	lprcat("\nSorry, but your savefile can't be deleted.  This can only mean\n");
	lprcat("that you tried to CHEAT by protecting the directory the savefile\n");
	lprcat("is in.  Since this is unfair to the rest of the larn community, I\n");
	lprcat("cannot let you play this game.\n");
	nap(5000);
	c[GOLD] = c[BANKACCOUNT] = 0;
	died(-268);
}