/*	$OpenBSD: scores.c,v 1.11 2006/04/20 03:25:36 ray Exp $	*/
/*	$NetBSD: scores.c,v 1.2 1995/04/22 07:42:38 cgd Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek and Darren F. Provine.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)scores.c	8.1 (Berkeley) 5/31/93
 */

/** @addtogroup tetris
 * @{ 
 */
/** @file
 */

/*
 * Score code for Tetris, by Darren Provine (kilroy@gboro.glassboro.edu)
 * modified 22 January 1992, to limit the number of entries any one
 * person has.
 *
 * Major whacks since then.
 */
#include <errno.h>
/* #include <err.h> */
/* #include <fcntl.h> */
/* #include <pwd.h> */
#include <stdio.h>
/* #include <stdlib.h> */
#include <string.h>
#include <kbd/kbd.h>
#include <kbd/keycode.h>
#include <stdlib.h>
/* #include <time.h> */
/* #include <term.h> */
/* #include <unistd.h> */
/* #include <sys/param.h> */
/* #include <sys/stat.h> */
/* #include <sys/types.h> */

#include "pathnames.h"
#include "screen.h"
#include "tetris.h"
#include "scores.h"

/*
 * Within this code, we can hang onto one extra "high score", leaving
 * room for our current score (whether or not it is high).
 *
 * We also sometimes keep tabs on the "highest" score on each level.
 * As long as the scores are kept sorted, this is simply the first one at
 * that level.
 */
#define NUMSPOTS (MAXHISCORES + 1)
#define	NLEVELS (MAXLEVEL + 1)

/* static time_t now; */
/* static int nscores; */
/* static int gotscores; */
/* static struct highscore scores[NUMSPOTS]; */
static struct highscore scores[NUMSPOTS];

/* static int checkscores(struct highscore *, int); */
/* static int cmpscores(const void *, const void *); */
/* static void getscores(FILE **); */
/* static void printem(int, int, struct highscore *, int, const char *); */
/* static char *thisuser(void); */

void showscores(int firstgame)
{
	int i;
	
	clear_screen();
	moveto(10, 0);
	printf("\tRank \tLevel \tName\t                     points\n");
	printf("\t========================================================\n");
	for (i = 0; i < NUMSPOTS - 1; i++) {
		printf("\t%6d %6d %-16s %20d\n", i+1, scores[i].hs_level, scores[i].hs_name, scores[i].hs_score);
	}
	if (!firstgame) {
		printf("\t========================================================\n");
		printf("\t  Last %6d %-16s %20d\n", scores[NUMSPOTS - 1].hs_level, scores[NUMSPOTS - 1].hs_name, scores[NUMSPOTS - 1].hs_score);
	}
	printf("\n\n\n\n\tPress any key to return to main menu.");
	getchar();
}

/** Copy from hiscore table score with index src to dest
 *
 */
static void copyhiscore(int dest, int src)
{
	str_cpy(scores[dest].hs_name, STR_BOUNDS(MAXLOGNAME) + 1,
	    scores[src].hs_name);
	scores[dest].hs_score = scores[src].hs_score; 	
	scores[dest].hs_level = scores[src].hs_level; 
}

void insertscore(int score, int level)
{
	int i,j;
	size_t off;
	kbd_event_t ev;
	
	clear_screen();
	moveto(10 , 10);
	puts("Insert your name: ");
	str_cpy(scores[NUMSPOTS - 1].hs_name, STR_BOUNDS(MAXLOGNAME) + 1,
	    "Player");
	i = 6; off = 6;

	moveto(10 , 28);
	printf("%s%.*s",scores[NUMSPOTS - 1].hs_name,MAXLOGNAME-i,"........................................");

	while (1) {
		fflush(stdout);
		if (kbd_get_event(&ev) != EOK)
			exit(1);

		if (ev.type == KE_RELEASE)
			continue;

		if (ev.key == KC_ENTER || ev.key == KC_NENTER)
			break;

		if (ev.key == KC_BACKSPACE) {
			if (i > 0) {
				wchar_t uc;

				--i;
				while (off > 0) {
					--off;
					size_t otmp = off;
					uc = str_decode(scores[NUMSPOTS - 1].hs_name,
					    &otmp, STR_BOUNDS(MAXLOGNAME) + 1);
					if (uc != U_SPECIAL)
						break;
				}

				scores[NUMSPOTS - 1].hs_name[off] = '\0';
			}
		} else if (ev.c != '\0') {
			if (i < (MAXLOGNAME - 1)) {
				if (chr_encode(ev.c, scores[NUMSPOTS - 1].hs_name,
				    &off, STR_BOUNDS(MAXLOGNAME) + 1) == EOK) {
					++i;
				}
				scores[NUMSPOTS - 1].hs_name[off] = '\0';
			}
		}
		
		moveto(10 , 28);
		printf("%s%.*s",scores[NUMSPOTS - 1].hs_name,MAXLOGNAME-i,"........................................");
	}
	
	scores[NUMSPOTS - 1].hs_score = score;	
	scores[NUMSPOTS - 1].hs_level = level;
	
	i = NUMSPOTS-1;	
	while ((i > 0) && (scores[i - 1].hs_score < score))
		i--;

	for (j = NUMSPOTS - 2; j > i; j--) {
		copyhiscore(j,j-1);
	}
	copyhiscore(i, NUMSPOTS - 1);	
}

void initscores(void)
{
	int i;
	for(i = 0; i < NUMSPOTS; i++) {
		str_cpy(scores[i].hs_name, STR_BOUNDS(MAXLOGNAME) + 1, "HelenOS Team");
		scores[i].hs_score = (NUMSPOTS - i) * 200;	
		scores[i].hs_level = (i + 1 > MAXLEVEL?MAXLEVEL:i + 1);
	}
}

/*
 * Read the score file.  Can be called from savescore (before showscores)
 * or showscores (if savescore will not be called).  If the given pointer
 * is not NULL, sets *fpp to an open file pointer that corresponds to a
 * read/write score file that is locked with LOCK_EX.  Otherwise, the
 * file is locked with LOCK_SH for the read and closed before return.
 *
 * Note, we assume closing the stdio file releases the lock.
 */
/* static void */
/* getscores(FILE **fpp) */
/* { */
/* 	int sd, mint, lck, mask, i; */
/* 	char *mstr, *human; */
/* 	FILE *sf; */

/* 	if (fpp != NULL) { */
/* 		mint = O_RDWR | O_CREAT; */
/* 		mstr = "r+"; */
/* 		human = "read/write"; */
/* 		lck = LOCK_EX; */
/* 	} else { */
/* 		mint = O_RDONLY; */
/* 		mstr = "r"; */
/* 		human = "reading"; */
/* 		lck = LOCK_SH; */
/* 	} */
/* 	setegid(egid); */
/* 	mask = umask(S_IWOTH); */
/* 	sd = open(_PATH_SCOREFILE, mint, 0666); */
/* 	(void)umask(mask); */
/* 	setegid(gid); */
/* 	if (sd < 0) { */
/* 		if (fpp == NULL) { */
/* 			nscores = 0; */
/* 			return; */
/* 		} */
/* 		err(1, "cannot open %s for %s", _PATH_SCOREFILE, human); */
/* 	} */
/* 	setegid(egid); */
/* 	if ((sf = fdopen(sd, mstr)) == NULL) */
/* 		err(1, "cannot fdopen %s for %s", _PATH_SCOREFILE, human); */
/* 	setegid(gid); */

/* 	/\* */
/* 	 * Grab a lock. */
/* 	 *\/ */
/* 	if (flock(sd, lck)) */
/* 		warn("warning: score file %s cannot be locked", */
/* 		    _PATH_SCOREFILE); */

/* 	nscores = fread(scores, sizeof(scores[0]), MAXHISCORES, sf); */
/* 	if (ferror(sf)) */
/* 		err(1, "error reading %s", _PATH_SCOREFILE); */
/* 	for (i = 0; i < nscores; i++) */
/* 		if (scores[i].hs_level < MINLEVEL || */
/* 		    scores[i].hs_level > MAXLEVEL) */
/* 			errx(1, "scorefile %s corrupt", _PATH_SCOREFILE); */

/* 	if (fpp) */
/* 		*fpp = sf; */
/* 	else */
/* 		(void)fclose(sf); */
/* } */

void
savescore(int level)
{
	return;
}
/* 	struct highscore *sp; */
/* 	int i; */
/* 	int change; */
/* 	FILE *sf; */
/* 	const char *me; */

/* 	getscores(&sf); */
/* 	gotscores = 1; */
/* 	(void)time(&now); */

/* 	/\* */
/* 	 * Allow at most one score per person per level -- see if we */
/* 	 * can replace an existing score, or (easiest) do nothing. */
/* 	 * Otherwise add new score at end (there is always room). */
/* 	 *\/ */
/* 	change = 0; */
/* 	me = thisuser(); */
/* 	for (i = 0, sp = &scores[0]; i < nscores; i++, sp++) { */
/* 		if (sp->hs_level != level || str_cmp(sp->hs_name, me) != 0) */
/* 			continue; */
/* 		if (score > sp->hs_score) { */
/* 			(void)printf("%s bettered %s %d score of %d!\n", */
/* 			    "\nYou", "your old level", level, */
/* 			    sp->hs_score * sp->hs_level); */
/* 			sp->hs_score = score;	/\* new score *\/ */
/* 			sp->hs_time = now;	/\* and time *\/ */
/* 			change = 1; */
/* 		} else if (score == sp->hs_score) { */
/* 			(void)printf("%s tied %s %d high score.\n", */
/* 			    "\nYou", "your old level", level); */
/* 			sp->hs_time = now;	/\* renew it *\/ */
/* 			change = 1;		/\* gotta rewrite, sigh *\/ */
/* 		} /\* else new score < old score: do nothing *\/ */
/* 		break; */
/* 	} */
/* 	if (i >= nscores) { */
/* 		strlcpy(sp->hs_name, me, sizeof sp->hs_name); */
/* 		sp->hs_level = level; */
/* 		sp->hs_score = score; */
/* 		sp->hs_time = now; */
/* 		nscores++; */
/* 		change = 1; */
/* 	} */

/* 	if (change) { */
/* 		/\* */
/* 		 * Sort & clean the scores, then rewrite. */
/* 		 *\/ */
/* 		nscores = checkscores(scores, nscores); */
/* 		rewind(sf); */
/* 		if (fwrite(scores, sizeof(*sp), nscores, sf) != nscores || */
/* 		    fflush(sf) == EOF) */
/* 			warnx("error writing %s: %s\n\t-- %s", */
/* 			    _PATH_SCOREFILE, strerror(errno), */
/* 			    "high scores may be damaged"); */
/* 	} */
/* 	(void)fclose(sf);	/\* releases lock *\/ */
/* } */

/*
 * Get login name, or if that fails, get something suitable.
 * The result is always trimmed to fit in a score.
 */
/* static char * */
/* thisuser(void) */
/* { */
/* 	const char *p; */
/* 	struct passwd *pw; */
/* 	static char u[sizeof(scores[0].hs_name)]; */

/* 	if (u[0]) */
/* 		return (u); */
/* 	p = getlogin(); */
/* 	if (p == NULL || *p == '\0') { */
/* 		pw = getpwuid(getuid()); */
/* 		if (pw != NULL) */
/* 			p = pw->pw_name; */
/* 		else */
/* 			p = "  ???"; */
/* 	} */
/* 	strlcpy(u, p, sizeof(u)); */
/* 	return (u); */
/* } */

/*
 * Score comparison function for qsort.
 *
 * If two scores are equal, the person who had the score first is
 * listed first in the highscore file.
 */
/* static int */
/* cmpscores(const void *x, const void *y) */
/* { */
/* 	const struct highscore *a, *b; */
/* 	long l; */

/* 	a = x; */
/* 	b = y; */
/* 	l = (long)b->hs_level * b->hs_score - (long)a->hs_level * a->hs_score; */
/* 	if (l < 0) */
/* 		return (-1); */
/* 	if (l > 0) */
/* 		return (1); */
/* 	if (a->hs_time < b->hs_time) */
/* 		return (-1); */
/* 	if (a->hs_time > b->hs_time) */
/* 		return (1); */
/* 	return (0); */
/* } */

/*
 * If we've added a score to the file, we need to check the file and ensure
 * that this player has only a few entries.  The number of entries is
 * controlled by MAXSCORES, and is to ensure that the highscore file is not
 * monopolised by just a few people.  People who no longer have accounts are
 * only allowed the highest score.  Scores older than EXPIRATION seconds are
 * removed, unless they are someone's personal best.
 * Caveat:  the highest score on each level is always kept.
 */
/* static int */
/* checkscores(struct highscore *hs, int num) */
/* { */
/* 	struct highscore *sp; */
/* 	int i, j, k, numnames; */
/* 	int levelfound[NLEVELS]; */
/* 	struct peruser { */
/* 		char *name; */
/* 		int times; */
/* 	} count[NUMSPOTS]; */
/* 	struct peruser *pu; */

/* 	/\* */
/* 	 * Sort so that highest totals come first. */
/* 	 * */
/* 	 * levelfound[i] becomes set when the first high score for that */
/* 	 * level is encountered.  By definition this is the highest score. */
/* 	 *\/ */
/* 	qsort((void *)hs, nscores, sizeof(*hs), cmpscores); */
/* 	for (i = MINLEVEL; i < NLEVELS; i++) */
/* 		levelfound[i] = 0; */
/* 	numnames = 0; */
/* 	for (i = 0, sp = hs; i < num;) { */
/* 		/\* */
/* 		 * This is O(n^2), but do you think we care? */
/* 		 *\/ */
/* 		for (j = 0, pu = count; j < numnames; j++, pu++) */
/* 			if (str_cmp(sp->hs_name, pu->name) == 0) */
/* 				break; */
/* 		if (j == numnames) { */
/* 			/\* */
/* 			 * Add new user, set per-user count to 1. */
/* 			 *\/ */
/* 			pu->name = sp->hs_name; */
/* 			pu->times = 1; */
/* 			numnames++; */
/* 		} else { */
/* 			/\* */
/* 			 * Two ways to keep this score: */
/* 			 * - Not too many (per user), still has acct, & */
/* 			 *	score not dated; or */
/* 			 * - High score on this level. */
/* 			 *\/ */
/* 			if ((pu->times < MAXSCORES && */
/* 			     getpwnam(sp->hs_name) != NULL && */
/* 			     sp->hs_time + EXPIRATION >= now) || */
/* 			    levelfound[sp->hs_level] == 0) */
/* 				pu->times++; */
/* 			else { */
/* 				/\* */
/* 				 * Delete this score, do not count it, */
/* 				 * do not pass go, do not collect $200. */
/* 				 *\/ */
/* 				num--; */
/* 				for (k = i; k < num; k++) */
/* 					hs[k] = hs[k + 1]; */
/* 				continue; */
/* 			} */
/* 		} */
/* 		levelfound[sp->hs_level] = 1; */
/* 		i++, sp++; */
/* 	} */
/* 	return (num > MAXHISCORES ? MAXHISCORES : num); */
/* } */

/*
 * Show current scores.  This must be called after savescore, if
 * savescore is called at all, for two reasons:
 * - Showscores munches the time field.
 * - Even if that were not the case, a new score must be recorded
 *   before it can be shown anyway.
 */
/*
void
showscores(int level)
{
	return;
}
*/
/* 	struct highscore *sp; */
/* 	int i, n, c; */
/* 	const char *me; */
/* 	int levelfound[NLEVELS]; */

/* 	if (!gotscores) */
/* 		getscores((FILE **)NULL); */
/* 	(void)printf("\n\t\t    Tetris High Scores\n"); */

/* 	/\* */
/* 	 * If level == 0, the person has not played a game but just asked for */
/* 	 * the high scores; we do not need to check for printing in highlight */
/* 	 * mode.  If SOstr is null, we can't do highlighting anyway. */
/* 	 *\/ */
/* 	me = level && SOstr ? thisuser() : NULL; */

/* 	/\* */
/* 	 * Set times to 0 except for high score on each level. */
/* 	 *\/ */
/* 	for (i = MINLEVEL; i < NLEVELS; i++) */
/* 		levelfound[i] = 0; */
/* 	for (i = 0, sp = scores; i < nscores; i++, sp++) { */
/* 		if (levelfound[sp->hs_level]) */
/* 			sp->hs_time = 0; */
/* 		else { */
/* 			sp->hs_time = 1; */
/* 			levelfound[sp->hs_level] = 1; */
/* 		} */
/* 	} */

/* 	/\* */
/* 	 * Page each screenful of scores. */
/* 	 *\/ */
/* 	for (i = 0, sp = scores; i < nscores; sp += n) { */
/* 		n = 20; */
/* 		if (i + n > nscores) */
/* 			n = nscores - i; */
/* 		printem(level, i + 1, sp, n, me); */
/* 		if ((i += n) < nscores) { */
/* 			(void)printf("\nHit RETURN to continue."); */
/* 			(void)fflush(stdout); */
/* 			while ((c = getchar()) != '\n') */
/* 				if (c == EOF) */
/* 					break; */
/* 			(void)printf("\n"); */
/* 		} */
/* 	} */

/* 	if (nscores == 0) */
/* 		printf("\t\t\t      - none to date.\n"); */
/* } */

/* static void */
/* printem(int level, int offset, struct highscore *hs, int n, const char *me) */
/* { */
/* 	struct highscore *sp; */
/* 	int row, highlight, i; */
/* 	char buf[100]; */
/* #define	TITLE "Rank  Score   Name                          (points/level)" */
/* #define	TITL2 "==========================================================" */

/* 	printf("%s\n%s\n", TITLE, TITL2); */

/* 	highlight = 0; */

/* 	for (row = 0; row < n; row++) { */
/* 		sp = &hs[row]; */
/* 		(void)snprintf(buf, sizeof(buf), */
/* 		    "%3d%c %6d  %-31s (%6d on %d)\n", */
/* 		    row + offset, sp->hs_time ? '*' : ' ', */
/* 		    sp->hs_score * sp->hs_level, */
/* 		    sp->hs_name, sp->hs_score, sp->hs_level); */
/* 		/\* Print leaders every three lines *\/ */
/* 		if ((row + 1) % 3 == 0) { */
/* 			for (i = 0; i < sizeof(buf); i++) */
/* 				if (buf[i] == ' ') */
/* 					buf[i] = '_'; */
/* 		} */
/* 		/\* */
/* 		 * Highlight if appropriate.  This works because */
/* 		 * we only get one score per level. */
/* 		 *\/ */
/* 		if (me != NULL && */
/* 		    sp->hs_level == level && */
/* 		    sp->hs_score == score && */
/* 		    str_cmp(sp->hs_name, me) == 0) { */
/* 			putpad(SOstr); */
/* 			highlight = 1; */
/* 		} */
/* 		(void)printf("%s", buf); */
/* 		if (highlight) { */
/* 			putpad(SEstr); */
/* 			highlight = 0; */
/* 		} */
/* 	} */
/* } */

/** @}
 */