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/*	$OpenBSD: tetris.c,v 1.21 2006/04/20 03:24:12 ray Exp $	*/

/*	$NetBSD: tetris.c,v 1.2 1995/04/22 07:42:47 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.

 *

 *	@(#)tetris.c	8.1 (Berkeley) 5/31/93

 */

/** @addtogroup tetris Tetris

 * @brief	Tetris ported from OpenBSD

 * @{ 

 */

/** @file

 */

#ifndef lint

static const char copyright[] =

"@(#) Copyright (c) 1992, 1993\n\

	The Regents of the University of California.  All rights reserved.\n";

#endif /* not lint */

/*

 * Tetris (or however it is spelled).

 */

#include <sys/time.h>

#include <sys/types.h>

#include <err.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "input.h"

#include "scores.h"

#include "screen.h"

#include "tetris.h"

cell	board[B_SIZE];

int	Rows, Cols;

const struct shape *curshape;

const struct shape *nextshape;

long	fallrate;

int	score;

//gid_t	gid, egid;

char	key_msg[100];

int	showpreview, classic;

static void	elide(void);

static void	setup_board(void);

const struct shape *randshape(void);

void	onintr(int);

void	usage(void);

/*

 * Set up the initial board.  The bottom display row is completely set,

 * along with another (hidden) row underneath that.  Also, the left and

 * right edges are set.

 */

static void

setup_board(void)

{

	int i;

	cell *p;

	p = board;

	for (i = B_SIZE; i; i--)

		*p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;

}

/*

 * Elide any full active rows.

 */

static void

elide(void)

{

	int rows = 0;

	int i, j, base;

	cell *p;

	for (i = A_FIRST; i < A_LAST; i++) {

		base = i * B_COLS + 1;

		p = &board[base];

		for (j = B_COLS - 2; *p++ != 0;) {

			if (--j <= 0) {

				/* this row is to be elided */

				rows++;

				memset(&board[base], 0, B_COLS - 2);

				scr_update();

				tsleep();

				while (--base != 0)

					board[base + B_COLS] = board[base];

				scr_update();

				tsleep();

				break;

			}

		}

	}

	switch (rows) {

	case 1:

		score += 10;

		break;

	case 2:

		score += 30;

		break;

	case 3:

		score += 70;

		break;

	case 4:

		score += 150;

		break;

	default:

		break;

	}

}

const struct shape *

randshape(void)

{

	const struct shape *tmp;

	int i, j;

	tmp = &shapes[random() % 7];

	j = random() % 4;

	for (i = 0; i < j; i++)

		tmp = &shapes[classic? tmp->rotc : tmp->rot];

	return (tmp);

}

static void srandomdev(void)

{

	struct timeval tv;

	gettimeofday(&tv, NULL);

	srandom(tv.tv_sec + tv.tv_usec / 100000);

}

static void tetris_menu_draw(int level) 

{

		clear_screen();

		moveto(5,10);

		puts("Tetris\n\n");

		moveto(8,10);

		printf("Level = %d (press keys 1 - 9 to change)",level);

		moveto(9,10);

		printf("Preview is %s (press 'p' to change)", (showpreview?"on ":"off"));

		moveto(12,10);

		printf("Press 'h' to show hiscore table.");

		moveto(13,10);

		printf("Press 's' to start game.");

		moveto(14,10);

		printf("Press 'q' to quit game.");

		moveto(20,10);

		printf("In game controls:");

		moveto(21,0);

		puts(key_msg);

}

static int tetris_menu(int *level) 

{

	static int firstgame = 1;

	int i;

/*	if (showpreview == 0)

		(void)printf("Your score:  %d point%s  x  level %d  =  %d\n",

		    score, score == 1 ? "" : "s", level, score * level);

	else {

 		(void)printf("Your score:  %d point%s x level %d x preview penalty %0.3f = %d\n", 

 		    score, score == 1 ? "" : "s", level, (double)PRE_PENALTY, 

 		    (int)(score * level * PRE_PENALTY)); 

 		score = score * PRE_PENALTY; 

	}

	savescore(level);

	showscores(level);

	printf("\nHit 's' to new game, 'q' to quit.\n");

*/

	tetris_menu_draw(*level);

	while (1) {

		i = getchar();

		switch(i) {

			case 'p':

				showpreview = !showpreview;

				moveto(9,21);

				if (showpreview)

					printf("on ");

				else

					printf("off");

				break;

			case 'h':

				showscores(firstgame);

				tetris_menu_draw(*level);

				break;

			case 's':

				firstgame = 0;

				return 1;

			case 'q':

				return 0;

			case '1':

			case '2':

			case '3':

			case '4':

			case '5':

			case '6':		

			case '7':

			case '8':

			case '9':

				*level = i - '0';

				moveto(8,18);

				printf("%d", *level);

				break;

		}

	}

}

int

main(int argc, char *argv[])

{

	int pos, c;

	char *keys;

	int level = 2;

	char key_write[6][10];

	int i, j;

	keys = "jkl pq";

//	gid = getgid();

//	egid = getegid();

//	setegid(gid);

	classic = 0;

	showpreview = 1; 

/* 	while ((ch = getopt(argc, argv, "ck:l:ps")) != -1) */

/* 		switch(ch) { */

/* 		case 'c': */

/* 			/\* */

/* 			 * this means: */

/* 			 *	- rotate the other way; */

/* 			 *	- no reverse video. */

/* 			 *\/ */

/* 			classic = 1; */

/* 			break; */

/* 		case 'k': */

/* 			if (str_size(keys = optarg) != 6) */

/* 				usage(); */

/* 			break; */

/* 		case 'l': */

/* 			level = (int)strtonum(optarg, MINLEVEL, MAXLEVEL, */

/* 			    &errstr); */

/* 			if (errstr) */

/* 				errx(1, "level must be from %d to %d", */

/* 				    MINLEVEL, MAXLEVEL); */

/* 			break; */

/* 		case 'p': */

/* 			showpreview = 1; */

/* 			break; */

/* 		case 's': */

/* 			showscores(0); */

/* 			exit(0); */

/* 		default: */

/* 			usage(); */

/* 		} */

/* 	argc -= optind; */

/* 	argv += optind; */

/* 	if (argc) */

/* 		usage(); */

	for (i = 0; i <= 5; i++) {

		for (j = i+1; j <= 5; j++) {

			if (keys[i] == keys[j])

				errx(1, "duplicate command keys specified.");

		}

		if (keys[i] == ' ')

			str_ncpy(key_write[i], "<space>", sizeof key_write[i]);

		else {

			key_write[i][0] = keys[i];

			key_write[i][1] = '\0';

		}

	}

	snprintf(key_msg, sizeof key_msg,

"%s - left   %s - rotate   %s - right   %s - drop   %s - pause   %s - quit",

		key_write[0], key_write[1], key_write[2], key_write[3],

		key_write[4], key_write[5]);

	scr_init();

	initscores();

	while (tetris_menu(&level)) {

		fallrate = 1000000 / level;

		scr_clear();

		setup_board();

		srandomdev();

		scr_set();

		pos = A_FIRST*B_COLS + (B_COLS/2)-1;

		nextshape = randshape();

		curshape = randshape();

		scr_msg(key_msg, 1);

		for (;;) {

			place(curshape, pos, 1);

			scr_update();

			place(curshape, pos, 0);

			c = tgetchar();

			if (c < 0) {

				/*

				 * Timeout.  Move down if possible.

				 */

				if (fits_in(curshape, pos + B_COLS)) {

					pos += B_COLS;

					continue;

				}

				/*

				 * Put up the current shape `permanently',

				 * bump score, and elide any full rows.

				 */

				place(curshape, pos, 1);

				score++;

				elide();

				/*

				 * Choose a new shape.  If it does not fit,

				 * the game is over.

				 */

				curshape = nextshape;

				nextshape = randshape();

				pos = A_FIRST*B_COLS + (B_COLS/2)-1;

				if (!fits_in(curshape, pos))

					break;

				continue;

			}

			/*

			 * Handle command keys.

			 */

			if (c == keys[5]) {

				/* quit */

				break;

			}

			if (c == keys[4]) {

				static char msg[] =

				    "paused - press RETURN to continue";

				place(curshape, pos, 1);

				do {

					scr_update();

					scr_msg(key_msg, 0);

					scr_msg(msg, 1);

					(void) fflush(stdout);

				} while (rwait((struct timeval *)NULL) == -1);

				scr_msg(msg, 0);

				scr_msg(key_msg, 1);

				place(curshape, pos, 0);

				continue;

			}

			if (c == keys[0]) {

				/* move left */

				if (fits_in(curshape, pos - 1))

					pos--;

				continue;

			}

			if (c == keys[1]) {

				/* turn */

				const struct shape *new = &shapes[

				    classic? curshape->rotc : curshape->rot];

				if (fits_in(new, pos))

					curshape = new;

				continue;

			}

			if (c == keys[2]) {

				/* move right */

				if (fits_in(curshape, pos + 1))

					pos++;

				continue;

			}

			if (c == keys[3]) {

				/* move to bottom */

				while (fits_in(curshape, pos + B_COLS)) {

					pos += B_COLS;

					score++;

				}

				continue;

			}

			if (c == '\f') {

				scr_clear();

				scr_msg(key_msg, 1);

			}

		}

		scr_clear();

		insertscore(score, level);

		score=0;

	}

	scr_clear();

	printf("\n\n\n\t\tGame over.\n");

/*	

	while ((i = getchar()) != '\n')

		if (i == EOF)

			break

*/

	scr_end();

	return 0;

}

/* void */

/* onintr(int signo) */

/* { */

/* 	scr_clear();		/\* XXX signal race *\/ */

/* 	scr_end();		/\* XXX signal race *\/ */

/* 	_exit(0); */

/* } */

void

usage(void)

{

	(void)fprintf(stderr, "usage: tetris [-ps] [-k keys] [-l level]\n");

	exit(1);

}

/** @}

 */