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/* $Id: gomo.c,v 1.4 2002/05/25 11:18:11 ptt Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include "config.h"
#include "pttstruct.h"
#include "gomo.h"
#include "common.h"
#include "modes.h"
#include "proto.h"

extern int usernum;
extern userinfo_t *currutmp;
extern time_t now;

char ku[BRDSIZ][BRDSIZ];
static char *chess[] = { "●", "○" };
static int tick, lastcount, mylasttick, hislasttick;

unsigned char  *pat, *adv;

typedef struct {
    char x;
    char y;
} Horder_t;

static Horder_t *v, pool[225];

static void HO_init() {
    memset(pool, 0, sizeof(pool));
    v = pool;
    pat = pat_gomoku;
    adv = adv_gomoku;
    memset(ku, 0, sizeof(ku));
}

static void HO_add(Horder_t *mv) {
    *v++ = *mv;
}

static void HO_undo(Horder_t *mv) {
    char *str = "┌┬┐├┼┤└┴┘";
    int n1, n2, loc;

    *mv = *(--v);
    ku[(int)mv->x][(int)mv->y] = BBLANK;
    BGOTO(mv->x, mv->y);
    n1 = (mv->x == 0) ? 0 : (mv->x == 14) ? 2 : 1;
    n2 = (mv->y == 14)? 0 : (mv->y == 0) ? 2 : 1;
    loc= 2 * ( n2 * 3 + n1);
    prints("%.2s", str + loc);
}

extern userec_t cuser;

static void HO_log(char *user) {
    int i;
    FILE *log;
    char buf[80];
    char buf1[80];
    char title[80];
    Horder_t *ptr = pool;
    extern screenline_t *big_picture;
    fileheader_t mymail;

    sprintf(buf, "home/%c/%s/F.%d", cuser.userid[0], cuser.userid,
        rand() & 65535);
    log = fopen(buf, "w");
    
    for(i = 1; i < 17; i++)
    fprintf(log, "%.*s\n", big_picture[i].len, big_picture[i].data);
    
    i = 0;
    do {
    fprintf(log, "[%2d]%s ==> %c%d%c", i + 1, chess[i % 2],
        'A' + ptr->x, ptr->y + 1, (i % 2) ? '\n' : '\t');
    i++;
    } while( ++ptr < v);
    fclose(log);
    
    sethomepath(buf1, cuser.userid);
    stampfile(buf1, &mymail);
    
    mymail.filemode = FILE_READ|FILE_HOLD;
    strcpy(mymail.owner, "[備.忘.錄]");
    sprintf(mymail.title, "\033[37;41m棋譜\033[m %s VS %s",
        cuser.userid, user);
    sethomedir(title, cuser.userid);
    Rename(buf, buf1);
    append_record(title, &mymail, sizeof(mymail));  
    
    unlink(buf);
}

static int countgomo() {
    Horder_t *ptr;
    int i;
    
    ptr = pool;
    i = 0;
    do {
    i++;
    } while(++ptr < v);
    return i;
}

static int chkmv(Horder_t *mv, int color, int limit) {
    char *xtype[] = {"\033[1;31m跳三\033[m", "\033[1;31m活三\033[m",
             "\033[1;31m死四\033[m", "\033[1;31m跳四\033[m",
             "\033[1;31m活四\033[m", "\033[1;31m四三\033[m",
             "\033[1;31m雙三\033[m", "\033[1;31m雙四\033[m",
             "\033[1;31m雙四\033[m", "\033[1;31m連六\033[m",
             "\033[1;31m連五\033[m"};
    int rule = getstyle(mv->x, mv->y, color, limit);
    if(rule > 1 && rule < 13) {
    move(15, 40);
    outs(xtype[rule - 2]);
    bell();
    }
    return chkwin(rule, limit);
}

static int gomo_key(int fd, int ch, Horder_t *mv) {
    if( ch >= 'a' && ch <= 'o') {
        char pbuf[4], vx, vy;
    
        *pbuf = ch;
    if(fd)
        add_io(0, 0);
        oldgetdata(17, 0, "直接指定位置 :", pbuf, sizeof(pbuf), DOECHO);
        if(fd)
        add_io(fd, 0);
        vx = pbuf[0] - 'a';
        vy = atoi(pbuf + 1) - 1;
        if(vx >= 0 && vx < 15 && vy >= 0 && vy < 15 &&
       ku[(int)vx][(int)vy] == BBLANK) {
        mv->x = vx;
        mv->y = vy;
        return 1;
        }
    } else {
        switch(ch) {
    case KEY_RIGHT:
            mv->x = (mv->x == BRDSIZ - 1) ? mv->x : mv->x + 1;
            break;
    case KEY_LEFT:
            mv->x = (mv->x == 0 ) ? 0 : mv->x - 1;
            break;
    case KEY_UP:
            mv->y = (mv->y == BRDSIZ - 1) ? mv->y : mv->y + 1;
            break;
    case KEY_DOWN:
            mv->y = (mv->y == 0 ) ? 0 : mv->y - 1;
            break;
    case ' ':
    case '\r':
            if(ku[(int)mv->x][(int)mv->y] == BBLANK)
        return 1;
        }
    }
    return 0;
}

extern userec_t xuser;

static int reload_gomo() {
    passwd_query(usernum, &xuser);
    cuser.five_win = xuser.five_win;
    cuser.five_lose = xuser.five_lose;
    cuser.five_tie = xuser.five_tie;
    return 0;
}   

int gomoku(int fd) {
    Horder_t mv;
    int me, he, win, ch;
    int hewantpass, iwantpass;
    userinfo_t *my = currutmp;
    
    HO_init();
    me = !(my->turn) + 1;
    he = my->turn + 1;
    win = 1;
    tick=now + MAX_TIME;
    lastcount = MAX_TIME;
    setutmpmode(M_FIVE);
    clear();
    
    prints("\033[1;46m  五子棋對戰  \033[45m%30s VS %-30s\033[m",
       cuser.userid, my->mateid);
    show_file("etc/@five", 1, -1, ONLY_COLOR);
    move(11, 40);
    prints("我是 %s", me == BBLACK ? "先手 ●, 有禁手" : "後手 ○");
    move(16, 40);
    prints("\033[1;33m%s", cuser.userid);
    move(17, 40);
    prints("\033[1;33m%s", my->mateid);
    
    reload_gomo();
    move(16, 60);
    prints("\033[1;31m%d\033[37m勝 \033[34m%d\033[37m敗 \033[36m%d\033[37m和"
       "\033[m", cuser.five_win, cuser.five_lose, cuser.five_tie);
    
    getuser(my->mateid);  
    move(17, 60);  
    prints("\033[1;31m%d\033[37m勝 \033[34m%d\033[37m敗 \033[36m%d\033[37m"
       "和\033[m", xuser.five_win, xuser.five_lose, xuser.five_tie);
    
    cuser.five_lose++;
    /* 一進來先加一場敗場, 贏了後再扣回去, 避免快輸了惡意斷線 */
    passwd_update(usernum, &cuser);
    
    add_io(fd, 0);
    
    hewantpass = iwantpass = 0;
    mv.x = mv.y = 7;
    move(18, 40);
    prints("%s時間還剩%d:%02d\n", my->turn ? "你的" : "對方",
       MAX_TIME / 60, MAX_TIME % 60);      
    for(;;) {
    move(13, 40);
    outs(my->turn ? "輪到自己下了!": "等待對方下子..");
    if(lastcount != tick-now) {
        lastcount = tick-now;
        move(18, 40);
        prints("%s時間還剩%d:%02d\n", my->turn ? "你的" : "對方",
           lastcount / 60, lastcount % 60);
        if(lastcount <= 0 && my->turn) {
        move(19, 40);
        outs("時間已到, 你輸了");
        my->five_lose++;
        send(fd, '\0', 1, 0);
        break;
        }
        if(lastcount <= -5 && !my->turn) {
        move(19, 40);
        outs("對手太久沒下, 你贏了!");
        win = 1;
        cuser.five_lose--;
        cuser.five_win++;
        my->five_win++;
        passwd_update(usernum, &cuser);
        mv.x = mv.y = -2;
        send(fd, &mv, sizeof(Horder_t), 0);
        mv = *(v - 1);      
        break;          
        }
    }
    move(14, 40);
    if(hewantpass) {
        outs("\033[1;32m和棋要求!\033[m");
        bell();
    } else
        clrtoeol();
    BGOTOCUR(mv.x, mv.y);
    ch = igetkey();
    if(ch != I_OTHERDATA)
        iwantpass = 0;
    if(ch == 'q') {
        if(countgomo() < 10) {
        cuser.five_lose--;          
        passwd_update(usernum, &cuser);
        }
        send(fd, '\0', 1, 0);
        break;
    } else if(ch == 'u' && !my->turn && v > pool) {
        mv.x = mv.y = -1;
        ch = send(fd, &mv, sizeof(Horder_t), 0);
        if(ch == sizeof(Horder_t)) {
            HO_undo(&mv);
        tick = mylasttick;
        my->turn = 1;
        continue;
        } else 
        break;
    }
    if(ch == 'p') {
        if(my->turn ) {
        if(iwantpass == 0) {
            iwantpass = 1;
            mv.x = mv.y = -2;
            send(fd, &mv, sizeof(Horder_t), 0);
            mv = *(v - 1);
        }
        continue;
        } else if(hewantpass) {
        win = 0;
        cuser.five_lose--;
        cuser.five_tie++;
        my->five_tie++;
        passwd_update(usernum, &cuser);
        mv.x=mv.y=-2;
        send(fd, &mv, sizeof(Horder_t), 0);
        mv = *(v - 1);
        break;
        }
    }
    
    if(ch == I_OTHERDATA) {
        ch = recv(fd, &mv, sizeof(Horder_t), 0);
        if(ch != sizeof(Horder_t)) {
        lastcount=tick-now;
        if(lastcount >=0) {
            win = 1;
            cuser.five_lose--;
            if(countgomo() >=10) {
            cuser.five_win++;
            my->five_win++;
            }
            passwd_update(usernum, &cuser);
            outmsg("對方認輸了!!");
            break;
        } else {
            win = 0;
            outmsg("你超過時間未下子, 輸了!");
            my->five_lose++;
            break;
        }
        } else if(mv.x == -2 && mv.y == -2) {
        if(iwantpass == 1) {
            win = 0;
            cuser.five_lose--;
            cuser.five_tie++;
            my->five_tie++;
            passwd_update(usernum, &cuser);
            break;
        } else {
            hewantpass = 1;
            mv = *(v - 1);
            continue;
        }
        }
        if(my->turn && mv.x == -1 && mv.y == -1) {
        outmsg("對方悔棋");
        tick = hislasttick;
        HO_undo(&mv);
        my->turn = 0;
        continue;
        }
        
        if(!my->turn) {
        win = chkmv(&mv, he, he == BBLACK);
        HO_add(&mv);
        hislasttick = tick;
        tick = now + MAX_TIME;
        ku[(int)mv.x][(int)mv.y] = he;
        bell();
        BGOTO(mv.x, mv.y);
        outs(chess[he - 1]);
        
        if(win) {
            outmsg(win == 1 ? "對方贏了!" : "對方禁手");
            if(win != 1) {
            cuser.five_lose--;
            cuser.five_win++;
            my->five_win++;
            passwd_update(usernum, &cuser);
            } else
                my->five_lose++;
            win = -win;
            break;
        }
        my->turn = 1;
        }
        continue;
    }
    
    if(my->turn) {
        if(gomo_key(fd, ch, &mv))
        my->turn = 0;
        else
        continue;
        
        if(!my->turn) {
        HO_add(&mv);
        BGOTO(mv.x, mv.y);
        outs(chess[me - 1]);
        win = chkmv( &mv, me, me == BBLACK);
        ku[(int)mv.x][(int)mv.y] = me;
        mylasttick = tick;
        tick = now + MAX_TIME;   /*倒數*/
        lastcount = MAX_TIME;
        if(send(fd, &mv, sizeof(Horder_t), 0) != sizeof(Horder_t))
            break;
        if(win) {
            outmsg(win == 1 ? "我贏囉~~" : "禁手輸了" );
            if(win == 1) {
            cuser.five_lose--;
            cuser.five_win++;
            my->five_win++;
            passwd_update(usernum, &cuser);
            } else 
                my->five_lose++;
            break;
        }
        move(15, 40);
        clrtoeol();
        }
    }
    }
    add_io(0, 0);
    close(fd);
    
    igetch();
    if(v > pool) { 
    char ans[4];
    
    getdata(19 , 0, "要保留本局成棋譜嗎?(y/N)", ans, sizeof(ans), LCECHO);
    if(*ans == 'y')
        HO_log(my->mateid);
    }
    return 0;
}