/*      $NetBSD: playit.c,v 1.25 2014/03/30 05:48:35 dholland Exp $     */
/*
 * Copyright (c) 1983-2003, Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * + Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * + 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.
 * + Neither the name of the University of California, San Francisco 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 COPYRIGHT HOLDERS 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 COPYRIGHT
 * OWNER 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
__RCSID("$NetBSD: playit.c,v 1.25 2014/03/30 05:48:35 dholland Exp $");
#endif /* not lint */

#include <sys/file.h>
#include <sys/poll.h>
#include <err.h>
#include <errno.h>
#include <curses.h>
#include <ctype.h>
#include <signal.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

#include "hunt_common.h"
#include "hunt_private.h"

#ifndef FREAD
#define FREAD   1
#endif


static int nchar_send;
#ifdef OTTO
int Otto_count;
int Otto_mode;
static int otto_y, otto_x;
static char otto_face;
#endif

#define MAX_SEND        5

/*
 * ibuf is the input buffer used for the stream from the driver.
 * It is small because we do not check for user input when there
 * are characters in the input buffer.
 */
static int icnt = 0;
static unsigned char ibuf[256], *iptr = ibuf;

#define GETCHR()        (--icnt < 0 ? getchr() : *iptr++)

static unsigned char getchr(void);
static void send_stuff(void);
static void redraw_screen(void);

/*
 * playit:
 *      Play a given game, handling all the curses commands from
 *      the driver.
 */
void
playit(void)
{
        int ch;
        int y, x;
        uint32_t version;
        ssize_t result;

        result = read(huntsocket, &version, sizeof(version));
        if (result != (ssize_t)sizeof(version)) {
                bad_con();
                /* NOTREACHED */
        }
        if (ntohl(version) != (uint32_t)HUNT_VERSION) {
                bad_ver();
                /* NOTREACHED */
        }
        errno = 0;
#ifdef OTTO
        Otto_count = 0;
#endif
        nchar_send = MAX_SEND;
        while ((ch = GETCHR()) != EOF) {
#ifdef DEBUG
                fputc(ch, stderr);
#endif
                switch (ch & 0377) {
                  case MOVE:
                        y = GETCHR();
                        x = GETCHR();
                        move(y, x);
                        break;
                  case ADDCH:
                        ch = GETCHR();
#ifdef OTTO
                        switch (ch) {

                        case '<':
                        case '>':
                        case '^':
                        case 'v':
                                otto_face = ch;
                                getyx(stdscr, otto_y, otto_x);
                                break;
                        }
#endif
                        addch(ch);
                        break;
                  case CLRTOEOL:
                        clrtoeol();
                        break;
                  case CLEAR:
                        clear_the_screen();
                        break;
                  case REFRESH:
                        refresh();
                        break;
                  case REDRAW:
                        redraw_screen();
                        refresh();
                        break;
                  case ENDWIN:
                        refresh();
                        if ((ch = GETCHR()) == LAST_PLAYER)
                                Last_player = true;
                        ch = EOF;
                        goto out;
                  case BELL:
                        beep();
                        break;
                  case READY:
                        refresh();
                        if (nchar_send < 0)
                                tcflush(STDIN_FILENO, TCIFLUSH);
                        nchar_send = MAX_SEND;
#ifndef OTTO
                        (void) GETCHR();
#else
                        Otto_count -= (GETCHR() & 0xff);
                        if (!Am_monitor) {
#ifdef DEBUG
                                fputc('0' + Otto_count, stderr);
#endif
                                if (Otto_count == 0 && Otto_mode)
                                        otto(otto_y, otto_x, otto_face);
                        }
#endif
                        break;
                  default:
#ifdef OTTO
                        switch (ch) {

                        case '<':
                        case '>':
                        case '^':
                        case 'v':
                                otto_face = ch;
                                getyx(stdscr, otto_y, otto_x);
                                break;
                        }
#endif
                        addch(ch);
                        break;
                }
        }
out:
        (void) close(huntsocket);
}

/*
 * getchr:
 *      Grab input and pass it along to the driver
 *      Return any characters from the driver
 *      When this routine is called by GETCHR, we already know there are
 *      no characters in the input buffer.
 */
static unsigned char
getchr(void)
{
        struct pollfd set[2];
        int nfds;

        set[0].fd = huntsocket;
        set[0].events = POLLIN;
        set[1].fd = STDIN_FILENO;
        set[1].events = POLLIN;

one_more_time:
        do {
                errno = 0;
                nfds = poll(set, 2, INFTIM);
        } while (nfds <= 0 && errno == EINTR);

        if (set[1].revents && POLLIN)
                send_stuff();
        if (! (set[0].revents & POLLIN))
                goto one_more_time;
        icnt = read(huntsocket, ibuf, sizeof ibuf);
        if (icnt < 0) {
                bad_con();
                /* NOTREACHED */
        }
        if (icnt == 0)
                goto one_more_time;
        iptr = ibuf;
        icnt--;
        return *iptr++;
}

/*
 * send_stuff:
 *      Send standard input characters to the driver
 */
static void
send_stuff(void)
{
        int count;
        char *sp, *nsp;
        static char inp[sizeof Buf];

        count = read(STDIN_FILENO, Buf, sizeof(Buf) - 1);
        if (count <= 0)
                return;
        if (nchar_send <= 0 && !no_beep) {
                (void) beep();
                return;
        }

        /*
         * look for 'q'uit commands; if we find one,
         * confirm it.  If it is not confirmed, strip
         * it out of the input
         */
        Buf[count] = '\0';
        nsp = inp;
        for (sp = Buf; *sp != '\0'; sp++)
                if ((*nsp = map_key[(unsigned char)*sp]) == 'q')
                        intr(0);
                else
                        nsp++;
        count = nsp - inp;
        if (count) {
#ifdef OTTO
                Otto_count += count;
#endif
                nchar_send -= count;
                if (nchar_send < 0)
                        count += nchar_send;
                (void) write(huntsocket, inp, count);
        }
}

/*
 * quit:
 *      Handle the end of the game when the player dies
 */
int
quit(int old_status)
{
        bool explain;
        int ch;

        if (Last_player)
                return Q_QUIT;
#ifdef OTTO
        if (Otto_mode)
                return Q_CLOAK;
#endif
        move(HEIGHT, 0);
        addstr("Re-enter game [ynwo]? ");
        clrtoeol();
        explain = false;
        for (;;) {
                refresh();
                if (isupper(ch = getchar()))
                        ch = tolower(ch);
                if (ch == 'y')
                        return old_status;
                else if (ch == 'o')
                        break;
                else if (ch == 'n') {
#ifndef INTERNET
                        return Q_QUIT;
#else
                        move(HEIGHT, 0);
                        addstr("Write a parting message [yn]? ");
                        clrtoeol();
                        refresh();
                        for (;;) {
                                if (isupper(ch = getchar()))
                                        ch = tolower(ch);
                                if (ch == 'y')
                                        goto get_message;
                                if (ch == 'n')
                                        return Q_QUIT;
                        }
#endif
                }
#ifdef INTERNET
                else if (ch == 'w') {
                        static char buf[WIDTH + WIDTH % 2];
                        char *cp, c;

get_message:
                        c = ch;         /* save how we got here */
                        move(HEIGHT, 0);
                        addstr("Message: ");
                        clrtoeol();
                        refresh();
                        cp = buf;
                        for (;;) {
                                refresh();
                                if ((ch = getchar()) == '\n' || ch == '\r')
                                        break;
                                if (ch == erasechar()) {
                                        if (cp > buf) {
                                                int y, x;
                                                getyx(stdscr, y, x);
                                                move(y, x - 1);
                                                cp -= 1;
                                                clrtoeol();
                                        }
                                        continue;
                                }
                                else if (ch == killchar()) {
                                        int y, x;
                                        getyx(stdscr, y, x);
                                        move(y, x - (cp - buf));
                                        cp = buf;
                                        clrtoeol();
                                        continue;
                                } else if (!isprint(ch)) {
                                        beep();
                                        continue;
                                }
                                addch(ch);
                                *cp++ = ch;
                                if (cp + 1 >= buf + sizeof buf)
                                        break;
                        }
                        *cp = '\0';
                        Send_message = buf;
                        return (c == 'w') ? old_status : Q_MESSAGE;
                }
#endif
                beep();
                if (!explain) {
                        addstr("(Yes, No, Write message, or Options) ");
                        explain = true;
                }
        }

        move(HEIGHT, 0);
#ifdef FLY
        addstr("Scan, Cloak, Flying, or Quit? ");
#else
        addstr("Scan, Cloak, or Quit? ");
#endif
        clrtoeol();
        refresh();
        explain = false;
        for (;;) {
                if (isupper(ch = getchar()))
                        ch = tolower(ch);
                if (ch == 's')
                        return Q_SCAN;
                else if (ch == 'c')
                        return Q_CLOAK;
#ifdef FLY
                else if (ch == 'f')
                        return Q_FLY;
#endif
                else if (ch == 'q')
                        return Q_QUIT;
                beep();
                if (!explain) {
#ifdef FLY
                        addstr("[SCFQ] ");
#else
                        addstr("[SCQ] ");
#endif
                        explain = true;
                }
                refresh();
        }
}

void
clear_the_screen(void)
{
        clear();
        move(0, 0);
        refresh();
}

static void
redraw_screen(void)
{
        clearok(stdscr, TRUE);
        touchwin(stdscr);
}

/*
 * do_message:
 *      Send a message to the driver and return
 */
void
do_message(void)
{
        uint32_t version;
        ssize_t result;

        result = read(huntsocket, &version, sizeof(version));
        if (result != (ssize_t)sizeof(version)) {
                bad_con();
                /* NOTREACHED */
        }
        if (ntohl(version) != (uint32_t)HUNT_VERSION) {
                bad_ver();
                /* NOTREACHED */
        }
#ifdef INTERNET
        if (write(huntsocket, Send_message, strlen(Send_message)) < 0) {
                bad_con();
                /* NOTREACHED */
        }
#endif
        (void) close(huntsocket);
}