/*      $NetBSD: score.c,v 1.16 2011/08/26 06:18:17 dholland Exp $      */

/*
 * Copyright (c) 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Timothy C. Stoehr.
 *
 * 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)score.c     8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: score.c,v 1.16 2011/08/26 06:18:17 dholland Exp $");
#endif
#endif /* not lint */

/*
 * score.c
 *
 * This source herein may be modified and/or distributed by anybody who
 * so desires, with the following restrictions:
 *    1.)  No portion of this notice shall be removed.
 *    2.)  Credit shall not be taken for the creation of this source.
 *    3.)  This code is not to be traded, sold, or used for personal
 *         gain or profit.
 *
 */

#include <stdio.h>
#include "rogue.h"
#include "pathnames.h"

static void center(short, const char *);
static int get_value(const object *);
static void id_all(void);
static void sell_pack(void);
static void sf_error(void) __dead;

void
killed_by(const object *monster, short other)
{
        const char *mechanism = "killed by something unknown (?)";
        char mechanism_buf[128];
        const char *article;
        char message_buf[128];

        md_ignore_signals();

        if (other != QUIT) {
                rogue.gold = ((rogue.gold * 9) / 10);
        }

        if (other) {
                switch(other) {
                case HYPOTHERMIA:
                        mechanism = "died of hypothermia";
                        break;
                case STARVATION:
                        mechanism = "died of starvation";
                        break;
                case POISON_DART:
                        mechanism = "killed by a dart";
                        break;
                case QUIT:
                        mechanism = "quit";
                        break;
                case KFIRE:
                        mechanism = "killed by fire";
                        break;
                }
        } else {
                if (is_vowel(m_names[monster->m_char - 'A'][0])) {
                        article = "an";
                } else {
                        article = "a";
                }
                snprintf(mechanism_buf, sizeof(mechanism_buf),
                        "Killed by %s %s",
                         article, m_names[monster->m_char - 'A']);
                mechanism = mechanism_buf;
        }
        snprintf(message_buf, sizeof(message_buf),
                 "%s with %ld gold", mechanism, rogue.gold);

        if ((!other) && (!no_skull)) {
                clear();
                mvaddstr(4, 32, "__---------__");
                mvaddstr(5, 30, "_~             ~_");
                mvaddstr(6, 29, "/                 \\");
                mvaddstr(7, 28, "~                   ~");
                mvaddstr(8, 27, "/                     \\");
                mvaddstr(9, 27, "|    XXXX     XXXX    |");
                mvaddstr(10, 27, "|    XXXX     XXXX    |");
                mvaddstr(11, 27, "|    XXX       XXX    |");
                mvaddstr(12, 28, "\\         @         /");
                mvaddstr(13, 29, "--\\     @@@     /--");
                mvaddstr(14, 30, "| |    @@@    | |");
                mvaddstr(15, 30, "| |           | |");
                mvaddstr(16, 30, "| vvVvvvvvvvVvv |");
                mvaddstr(17, 30, "|  ^^^^^^^^^^^  |");
                mvaddstr(18, 31, "\\_           _/");
                mvaddstr(19, 33, "~---------~");
                center(21, nick_name);
                center(22, message_buf);
        } else {
                messagef(0, "%s", message_buf);
        }
        messagef(0, "%s", "");          /* gcc objects to just "" */
        put_scores(monster, other);
}

void
win(void)
{
        unwield(rogue.weapon);          /* disarm and relax */
        unwear(rogue.armor);
        un_put_on(rogue.left_ring);
        un_put_on(rogue.right_ring);

        clear();
        mvaddstr(10, 11, "@   @  @@@   @   @      @  @  @   @@@   @   @   @");
        mvaddstr(11, 11, " @ @  @   @  @   @      @  @  @  @   @  @@  @   @");
        mvaddstr(12, 11, "  @   @   @  @   @      @  @  @  @   @  @ @ @   @");
        mvaddstr(13, 11, "  @   @   @  @   @      @  @  @  @   @  @  @@");
        mvaddstr(14, 11, "  @    @@@    @@@        @@ @@    @@@   @   @   @");
        mvaddstr(17, 11, "Congratulations,  you have  been admitted  to  the");
        mvaddstr(18, 11, "Fighters' Guild.   You return home,  sell all your");
        mvaddstr(19, 11, "treasures at great profit and retire into comfort.");
        messagef(0, "%s", "");          /* gcc objects to just "" */
        messagef(0, "%s", "");          /* gcc objects to just "" */
        id_all();
        sell_pack();
        put_scores(NULL, WIN);
}

void
quit(boolean from_intrpt)
{
        char buf[DCOLS];
        short i, orow, ocol;
        boolean mc;

        orow = ocol = 0;
        mc = FALSE;
        md_ignore_signals();

        if (from_intrpt) {
                orow = rogue.row;
                ocol = rogue.col;

                mc = msg_cleared;

                for (i = 0; i < DCOLS; i++) {
                        buf[i] = mvinch(0, i);
                }
        }
        check_message();
        messagef(1, "really quit?");
        if (rgetchar() != 'y') {
                md_heed_signals();
                check_message();
                if (from_intrpt) {
                        for (i = 0; i < DCOLS; i++) {
                                mvaddch(0, i, buf[i]);
                        }
                        msg_cleared = mc;
                        move(orow, ocol);
                        refresh();
                }
                return;
        }
        if (from_intrpt) {
                clean_up(byebye_string);
        }
        check_message();
        killed_by(NULL, QUIT);
}

/*
 * The score file on disk is up to ten entries of the form
 *      score block [80 bytes]
 *      nickname block [30 bytes]
 *
 * The score block is to be parsed as follows:
 *      bytes 0-1       Rank (" 1" to "10")
 *      bytes 2-4       space padding
 *      bytes 5-15      Score/gold
 *      byte 15 up to a ':'     Login name
 *      past the ':'    Death mechanism
 *
 * The nickname block is an alternate name to be printed in place of the
 * login name. Both blocks are supposed to contain a null-terminator.
 */

struct score_entry {
        long gold;
        char username[80];
        char death[80];
        char nickname[30];
};

#define NUM_SCORE_ENTRIES 10

static void make_score(struct score_entry *, const object *, int);

static
void
pad_spaces(char *str, size_t len)
{
        size_t x;
        for (x=strlen(str); x<len-1; x++) {
                str[x] = ' ';
        }
        str[len-1] = 0;
}

static
void
unpad_spaces(char *str)
{
        size_t x;
        for (x=strlen(str); x>0 && str[x-1]==' '; x--);
        str[x] = 0;
}

static
int
read_score_entry(struct score_entry *se, FILE *fp)
{
        char score_block[80];
        char nickname_block[30];
        size_t n, x;

        n = fread(score_block, 1, sizeof(score_block), fp);
        if (n==0) {
                /* EOF */
                return 0;
        }
        if (n != sizeof(score_block)) {
                sf_error();
        }

        n = fread(nickname_block, 1, sizeof(nickname_block), fp);
        if (n != sizeof(nickname_block)) {
                sf_error();
        }

        xxxx(score_block, sizeof(score_block));
        xxxx(nickname_block, sizeof(nickname_block));

        /* Ensure null termination */
        score_block[sizeof(score_block)-1] = 0;
        nickname_block[sizeof(nickname_block)-1] = 0;

        /* If there are other nulls in the score block, file is corrupt */
        if (strlen(score_block)!=sizeof(score_block)-1) {
                sf_error();
        }
        /* but this is NOT true of the nickname block */

        /* quash trailing spaces */
        unpad_spaces(score_block);
        unpad_spaces(nickname_block);

        for (x=5; score_block[x] == ' '; x++);
        se->gold = lget_number(score_block+x);

        for (x=15; score_block[x] != 0 && score_block[x] != ':'; x++);
        if (score_block[x] == 0) {
                sf_error();
        }
        score_block[x++] = 0;
        strlcpy(se->username, score_block+15, sizeof(se->username));

        strlcpy(se->death, score_block+x, sizeof(se->death));
        strlcpy(se->nickname, nickname_block, sizeof(se->nickname));

        return 1;
}

static
void
write_score_entry(const struct score_entry *se, int rank, FILE *fp)
{
        char score_block[80];
        char nickname_block[30];

        /* avoid writing crap to score file */
        memset(score_block, 0, sizeof(score_block));
        memset(nickname_block, 0, sizeof(nickname_block));

        snprintf(score_block, sizeof(score_block),
                 "%2d    %6ld   %s: %s",
                 rank+1, se->gold, se->username, se->death);
        strlcpy(nickname_block, se->nickname, sizeof(nickname_block));

        /* pad blocks out with spaces */
        pad_spaces(score_block, sizeof(score_block));
        /*pad_spaces(nickname_block, sizeof(nickname_block)); -- wrong! */

        xxxx(score_block, sizeof(score_block));
        xxxx(nickname_block, sizeof(nickname_block));

        fwrite(score_block, 1, sizeof(score_block), fp);
        fwrite(nickname_block, 1, sizeof(nickname_block), fp);
}

void
put_scores(const object *monster, short other)
{
        short i, rank=-1, found_player = -1, numscores = 0;
        struct score_entry scores[NUM_SCORE_ENTRIES];
        const char *name;
        FILE *fp;
        boolean dopause = score_only;

        md_lock(1);

        setegid(egid);
        if ((fp = fopen(_PATH_SCOREFILE, "r+")) == NULL &&
            (fp = fopen(_PATH_SCOREFILE, "w+")) == NULL) {
                setegid(gid);
                messagef(0, "cannot read/write/create score file");
                sf_error();
        }
        setegid(gid);
        rewind(fp);
        (void)xxx(1);

        for (numscores = 0; numscores < NUM_SCORE_ENTRIES; numscores++) {
                if (read_score_entry(&scores[numscores], fp) == 0) {
                        break;
                }
        }

        /* Search the score list. */
        for (i=0; i<numscores; i++) {
                if (!strcmp(scores[i].username, login_name)) {
                        /* found our score */
                        if (rogue.gold < scores[i].gold) {
                                /* we didn't do as well as last time */
                                score_only = 1;
                        } else {
                                /* we did better; mark entry for removal */
                                found_player = i;
                        }
                        break;
                }
        }

        /* Remove a superseded entry, if any. */
        if (found_player != -1) {
                numscores--;
                for (i = found_player; i < numscores; i++) {
                        scores[i] = scores[i+1];
                }
        }

        /* If we're going to insert ourselves, do it now */
        if (!score_only) {

                /* if we aren't better than anyone, add at end. */
                rank = numscores;

                /* Otherwise, find our slot. */
                for (i = 0; i < numscores; i++) {
                        if (rogue.gold >= scores[i].gold) {
                                rank = i;
                                break;
                        }
                }

                if (rank < NUM_SCORE_ENTRIES) {
                        /* Open up a slot */
                        for (i = numscores; i > rank; i--) {
                                scores[i] = scores[i-1];
                        }
                        numscores++;

                        /* Put our info in the slot */
                        make_score(&scores[rank], monster, other);
                }

                /* Now rewrite the score file */

                md_ignore_signals();
                rewind(fp);
                (void)xxx(1);

                for (i = 0; i < numscores; i++) {
                        write_score_entry(&scores[i], i, fp);
                }
        }
        md_lock(0);
        fclose(fp);

        /* Display the scores */

        clear();
        mvaddstr(3, 30, "Top  Ten  Rogueists");
        mvaddstr(8, 0, "Rank   Score   Name");

        for (i = 0; i < numscores; i++) {
                if (i == rank) {
                        standout();
                }

                if (scores[i].nickname[0]) {
                        name = scores[i].nickname;
                } else {
                        name = scores[i].username;
                }

                mvprintw(i+10, 0, "%2d    %6ld   %s: %s",
                         i+1, scores[i].gold, name, scores[i].death);

                if (i == rank) {
                        standend();
                }
        }
        refresh();
        messagef(0, "%s", "");          /* gcc objects to just "" */
        if (dopause) {
                messagef(0, "%s", "");
        }
        clean_up("");
}

static
void
make_score(struct score_entry *se, const object *monster, int other)
{
        const char *death = "bolts from the blue (?)";
        const char *hasamulet;
        char deathbuf[80];

        se->gold = rogue.gold;
        strlcpy(se->username, login_name, sizeof(se->username));

        if (other) {
                switch(other) {
                case HYPOTHERMIA:
                        death = "died of hypothermia";
                        break;
                case STARVATION:
                        death = "died of starvation";
                        break;
                case POISON_DART:
                        death = "killed by a dart";
                        break;
                case QUIT:
                        death = "quit";
                        break;
                case WIN:
                        death = "a total winner";
                        break;
                case KFIRE:
                        death = "killed by fire";
                        break;
                }
        } else {
                const char *mn, *article;

                mn = m_names[monster->m_char - 'A'];
                if (is_vowel(mn[0])) {
                        article = "an";
                } else {
                        article = "a";
                }

                snprintf(deathbuf, sizeof(deathbuf),
                         "killed by %s %s", article, mn);
                death = deathbuf;
        }

        if (other != WIN && has_amulet()) {
                hasamulet = " with amulet";
        } else {
                hasamulet = "";
        }

        snprintf(se->death, sizeof(se->death), "%s on level %d%s",
                 death, max_level, hasamulet);

        strlcpy(se->nickname, nick_name, sizeof(se->nickname));
}

boolean
is_vowel(short ch)
{
        return( (ch == 'a') ||
                (ch == 'e') ||
                (ch == 'i') ||
                (ch == 'o') ||
                (ch == 'u') );
}

static void
sell_pack(void)
{
        object *obj;
        short row = 2, val;
        char buf[DCOLS];

        obj = rogue.pack.next_object;

        clear();
        mvaddstr(1, 0, "Value      Item");

        while (obj) {
                if (obj->what_is != FOOD) {
                        obj->identified = 1;
                        val = get_value(obj);
                        rogue.gold += val;

                        if (row < DROWS) {
                                get_desc(obj, buf, sizeof(buf));
                                mvprintw(row++, 0, "%5d      %s", val, buf);
                        }
                }
                obj = obj->next_object;
        }
        refresh();
        if (rogue.gold > MAX_GOLD) {
                rogue.gold = MAX_GOLD;
        }
        messagef(0, "%s", "");          /* gcc objects to just "" */
}

static int
get_value(const object *obj)
{
        short wc;
        int val;

        val = 0;
        wc = obj->which_kind;

        switch(obj->what_is) {
        case WEAPON:
                val = id_weapons[wc].value;
                if ((wc == ARROW) || (wc == DAGGER) || (wc == SHURIKEN) ||
                        (wc == DART)) {
                        val *= obj->quantity;
                }
                val += (obj->d_enchant * 85);
                val += (obj->hit_enchant * 85);
                break;
        case ARMOR:
                val = id_armors[wc].value;
                val += (obj->d_enchant * 75);
                if (obj->is_protected) {
                        val += 200;
                }
                break;
        case WAND:
                val = id_wands[wc].value * (obj->class + 1);
                break;
        case SCROL:
                val = id_scrolls[wc].value * obj->quantity;
                break;
        case POTION:
                val = id_potions[wc].value * obj->quantity;
                break;
        case AMULET:
                val = 5000;
                break;
        case RING:
                val = id_rings[wc].value * (obj->class + 1);
                break;
        }
        if (val <= 0) {
                val = 10;
        }
        return(val);
}

static void
id_all(void)
{
        short i;

        for (i = 0; i < SCROLS; i++) {
                id_scrolls[i].id_status = IDENTIFIED;
        }
        for (i = 0; i < WEAPONS; i++) {
                id_weapons[i].id_status = IDENTIFIED;
        }
        for (i = 0; i < ARMORS; i++) {
                id_armors[i].id_status = IDENTIFIED;
        }
        for (i = 0; i < WANDS; i++) {
                id_wands[i].id_status = IDENTIFIED;
        }
        for (i = 0; i < POTIONS; i++) {
                id_potions[i].id_status = IDENTIFIED;
        }
}

void
xxxx(char *buf, short n)
{
        short i;
        unsigned char c;

        for (i = 0; i < n; i++) {

                /* It does not matter if accuracy is lost during this assignment */
                c = (unsigned char)xxx(0);

                buf[i] ^= c;
        }
}

long
xxx(boolean st)
{
        static long f, s;
        long r;

        if (st) {
                f = 37;
                s = 7;
                return(0L);
        }
        r = ((f * s) + 9337) % 8887;
        f = s;
        s = r;
        return(r);
}

static void
center(short row, const char *buf)
{
        short margin;

        margin = ((DCOLS - strlen(buf)) / 2);
        mvaddstr(row, margin, buf);
}

static void
sf_error(void)
{
        md_lock(0);
        messagef(1, "%s", "");          /* gcc objects to just "" */
        clean_up("sorry, score file is out of order");
}